1 | <?php |
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2 | /* |
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3 | |
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4 | @version V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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5 | Latest version is available at http://adodb.sourceforge.net |
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6 | |
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7 | Released under both BSD license and Lesser GPL library license. |
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8 | Whenever there is any discrepancy between the two licenses, |
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9 | the BSD license will take precedence. |
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10 | |
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11 | Active Record implementation. Superset of Zend Framework's. |
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12 | |
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13 | Version 0.07 |
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14 | |
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15 | See http://www-128.ibm.com/developerworks/java/library/j-cb03076/?ca=dgr-lnxw01ActiveRecord |
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16 | for info on Ruby on Rails Active Record implementation |
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17 | */ |
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18 | |
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19 | global $_ADODB_ACTIVE_DBS; |
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20 | global $ADODB_ACTIVE_CACHESECS; // set to true to enable caching of metadata such as field info |
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21 | global $ACTIVE_RECORD_SAFETY; // set to false to disable safety checks |
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22 | |
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23 | // array of ADODB_Active_DB's, indexed by ADODB_Active_Record->_dbat |
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24 | $_ADODB_ACTIVE_DBS = array(); |
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25 | $ACTIVE_RECORD_SAFETY = true; |
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26 | |
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27 | class ADODB_Active_DB { |
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28 | var $db; // ADOConnection |
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29 | var $tables; // assoc array of ADODB_Active_Table objects, indexed by tablename |
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30 | } |
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31 | |
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32 | class ADODB_Active_Table { |
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33 | var $name; // table name |
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34 | var $flds; // assoc array of adofieldobjs, indexed by fieldname |
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35 | var $keys; // assoc array of primary keys, indexed by fieldname |
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36 | var $_created; // only used when stored as a cached file |
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37 | } |
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38 | |
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39 | // returns index into $_ADODB_ACTIVE_DBS |
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40 | function ADODB_SetDatabaseAdapter(&$db) |
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41 | { |
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42 | global $_ADODB_ACTIVE_DBS; |
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43 | |
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44 | foreach($_ADODB_ACTIVE_DBS as $k => $d) { |
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45 | if (PHP_VERSION >= 5) { |
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46 | if ($d->db === $db) return $k; |
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47 | } else { |
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48 | if ($d->db->_connectionID === $db->_connectionID && $db->database == $d->db->database) |
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49 | return $k; |
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50 | } |
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51 | } |
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52 | |
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53 | $obj = new ADODB_Active_DB(); |
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54 | $obj->db =& $db; |
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55 | $obj->tables = array(); |
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56 | |
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57 | $_ADODB_ACTIVE_DBS[] = $obj; |
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58 | |
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59 | return sizeof($_ADODB_ACTIVE_DBS)-1; |
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60 | } |
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61 | |
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62 | |
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63 | class ADODB_Active_Record { |
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64 | var $_dbat; // associative index pointing to ADODB_Active_DB eg. $ADODB_Active_DBS[_dbat] |
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65 | var $_table; // tablename, if set in class definition then use it as table name |
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66 | var $_tableat; // associative index pointing to ADODB_Active_Table, eg $ADODB_Active_DBS[_dbat]->tables[$this->_tableat] |
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67 | var $_where; // where clause set in Load() |
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68 | var $_saved = false; // indicates whether data is already inserted. |
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69 | var $_lasterr = false; // last error message |
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70 | var $_original = false; // the original values loaded or inserted, refreshed on update |
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71 | |
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72 | // should be static |
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73 | function SetDatabaseAdapter(&$db) |
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74 | { |
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75 | return ADODB_SetDatabaseAdapter($db); |
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76 | } |
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77 | |
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78 | // php4 constructor |
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79 | function ADODB_Active_Record($table = false, $pkeyarr=false, $db=false) |
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80 | { |
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81 | ADODB_Active_Record::__construct($table,$pkeyarr,$db); |
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82 | } |
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83 | |
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84 | // php5 constructor |
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85 | function __construct($table = false, $pkeyarr=false, $db=false) |
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86 | { |
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87 | global $ADODB_ASSOC_CASE,$_ADODB_ACTIVE_DBS; |
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88 | |
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89 | if ($db == false && is_object($pkeyarr)) { |
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90 | $db = $pkeyarr; |
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91 | $pkeyarr = false; |
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92 | } |
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93 | |
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94 | if (!$table) { |
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95 | if (!empty($this->_table)) $table = $this->_table; |
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96 | else $table = $this->_pluralize(get_class($this)); |
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97 | } |
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98 | if ($db) { |
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99 | $this->_dbat = ADODB_Active_Record::SetDatabaseAdapter($db); |
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100 | } else |
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101 | $this->_dbat = sizeof($_ADODB_ACTIVE_DBS)-1; |
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102 | |
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103 | |
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104 | if ($this->_dbat < 0) $this->Error("No database connection set; use ADOdb_Active_Record::SetDatabaseAdapter(\$db)",'ADODB_Active_Record::__constructor'); |
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105 | |
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106 | $this->_table = $table; |
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107 | $this->_tableat = $table; # reserved for setting the assoc value to a non-table name, eg. the sql string in future |
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108 | $this->UpdateActiveTable($pkeyarr); |
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109 | } |
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110 | |
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111 | function __wakeup() |
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112 | { |
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113 | $class = get_class($this); |
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114 | new $class; |
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115 | } |
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116 | |
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117 | function _pluralize($table) |
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118 | { |
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119 | $ut = strtoupper($table); |
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120 | $len = strlen($table); |
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121 | $lastc = $ut[$len-1]; |
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122 | $lastc2 = substr($ut,$len-2); |
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123 | switch ($lastc) { |
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124 | case 'S': |
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125 | return $table.'es'; |
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126 | case 'Y': |
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127 | return substr($table,0,$len-1).'ies'; |
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128 | case 'X': |
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129 | return $table.'es'; |
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130 | case 'H': |
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131 | if ($lastc2 == 'CH' || $lastc2 == 'SH') |
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132 | return $table.'es'; |
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133 | default: |
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134 | return $table.'s'; |
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135 | } |
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136 | } |
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137 | |
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138 | ////////////////////////////////// |
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139 | |
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140 | // update metadata |
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141 | function UpdateActiveTable($pkeys=false,$forceUpdate=false) |
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142 | { |
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143 | global $ADODB_ASSOC_CASE,$_ADODB_ACTIVE_DBS , $ADODB_CACHE_DIR, $ADODB_ACTIVE_CACHESECS; |
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144 | |
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145 | $activedb =& $_ADODB_ACTIVE_DBS[$this->_dbat]; |
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146 | |
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147 | $table = $this->_table; |
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148 | $tables = $activedb->tables; |
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149 | $tableat = $this->_tableat; |
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150 | if (!$forceUpdate && !empty($tables[$tableat])) { |
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151 | $tobj =& $tables[$tableat]; |
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152 | foreach($tobj->flds as $name => $fld) |
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153 | $this->$name = null; |
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154 | return; |
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155 | } |
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156 | |
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157 | $db =& $activedb->db; |
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158 | $fname = $ADODB_CACHE_DIR . '/adodb_' . $db->databaseType . '_active_'. $table . '.cache'; |
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159 | if (!$forceUpdate && $ADODB_ACTIVE_CACHESECS && $ADODB_CACHE_DIR && file_exists($fname)) { |
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160 | $fp = fopen($fname,'r'); |
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161 | @flock($fp, LOCK_SH); |
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162 | $acttab = unserialize(fread($fp,100000)); |
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163 | fclose($fp); |
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164 | if ($acttab->_created + $ADODB_ACTIVE_CACHESECS - (abs(rand()) % 16) > time()) { |
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165 | // abs(rand()) randomizes deletion, reducing contention to delete/refresh file |
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166 | // ideally, you should cache at least 32 secs |
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167 | $activedb->tables[$table] = $acttab; |
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168 | |
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169 | //if ($db->debug) ADOConnection::outp("Reading cached active record file: $fname"); |
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170 | return; |
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171 | } else if ($db->debug) { |
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172 | ADOConnection::outp("Refreshing cached active record file: $fname"); |
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173 | } |
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174 | } |
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175 | $activetab = new ADODB_Active_Table(); |
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176 | $activetab->name = $table; |
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177 | |
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178 | |
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179 | $cols = $db->MetaColumns($table); |
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180 | if (!$cols) { |
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181 | $this->Error("Invalid table name: $table",'UpdateActiveTable'); |
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182 | return false; |
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183 | } |
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184 | $fld = reset($cols); |
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185 | if (!$pkeys) { |
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186 | if (isset($fld->primary_key)) { |
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187 | $pkeys = array(); |
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188 | foreach($cols as $name => $fld) { |
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189 | if (!empty($fld->primary_key)) $pkeys[] = $name; |
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190 | } |
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191 | } else |
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192 | $pkeys = $this->GetPrimaryKeys($db, $table); |
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193 | } |
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194 | if (empty($pkeys)) { |
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195 | $this->Error("No primary key found for table $table",'UpdateActiveTable'); |
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196 | return false; |
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197 | } |
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198 | |
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199 | $attr = array(); |
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200 | $keys = array(); |
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201 | |
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202 | switch($ADODB_ASSOC_CASE) { |
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203 | case 0: |
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204 | foreach($cols as $name => $fldobj) { |
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205 | $name = strtolower($name); |
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206 | $this->$name = null; |
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207 | $attr[$name] = $fldobj; |
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208 | } |
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209 | foreach($pkeys as $k => $name) { |
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210 | $keys[strtolower($name)] = strtolower($name); |
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211 | } |
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212 | break; |
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213 | |
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214 | case 1: |
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215 | foreach($cols as $name => $fldobj) { |
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216 | $name = strtoupper($name); |
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217 | $this->$name = null; |
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218 | $attr[$name] = $fldobj; |
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219 | } |
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220 | |
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221 | foreach($pkeys as $k => $name) { |
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222 | $keys[strtoupper($name)] = strtoupper($name); |
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223 | } |
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224 | break; |
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225 | default: |
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226 | foreach($cols as $name => $fldobj) { |
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227 | $name = ($fldobj->name); |
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228 | $this->$name = null; |
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229 | $attr[$name] = $fldobj; |
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230 | } |
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231 | foreach($pkeys as $k => $name) { |
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232 | $keys[$name] = $cols[$name]->name; |
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233 | } |
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234 | break; |
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235 | } |
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236 | |
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237 | $activetab->keys = $keys; |
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238 | $activetab->flds = $attr; |
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239 | |
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240 | if ($ADODB_ACTIVE_CACHESECS && $ADODB_CACHE_DIR) { |
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241 | $activetab->_created = time(); |
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242 | $s = serialize($activetab); |
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243 | if (!function_exists('adodb_write_file')) include(ADODB_DIR.'/adodb-csvlib.inc.php'); |
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244 | adodb_write_file($fname,$s); |
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245 | } |
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246 | $activedb->tables[$table] = $activetab; |
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247 | } |
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248 | |
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249 | function GetPrimaryKeys(&$db, $table) |
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250 | { |
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251 | return $db->MetaPrimaryKeys($table); |
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252 | } |
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253 | |
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254 | // error handler for both PHP4+5. |
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255 | function Error($err,$fn) |
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256 | { |
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257 | global $_ADODB_ACTIVE_DBS; |
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258 | |
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259 | $fn = get_class($this).'::'.$fn; |
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260 | $this->_lasterr = $fn.': '.$err; |
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261 | |
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262 | if ($this->_dbat < 0) $db = false; |
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263 | else { |
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264 | $activedb = $_ADODB_ACTIVE_DBS[$this->_dbat]; |
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265 | $db =& $activedb->db; |
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266 | } |
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267 | |
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268 | if (function_exists('adodb_throw')) { |
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269 | if (!$db) adodb_throw('ADOdb_Active_Record', $fn, -1, $err, 0, 0, false); |
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270 | else adodb_throw($db->databaseType, $fn, -1, $err, 0, 0, $db); |
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271 | } else |
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272 | if (!$db || $db->debug) ADOConnection::outp($this->_lasterr); |
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273 | |
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274 | } |
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275 | |
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276 | // return last error message |
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277 | function ErrorMsg() |
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278 | { |
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279 | if (!function_exists('adodb_throw')) { |
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280 | if ($this->_dbat < 0) $db = false; |
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281 | else $db = $this->DB(); |
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282 | |
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283 | // last error could be database error too |
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284 | if ($db && $db->ErrorMsg()) return $db->ErrorMsg(); |
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285 | } |
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286 | return $this->_lasterr; |
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287 | } |
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288 | |
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289 | function ErrorNo() |
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290 | { |
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291 | if ($this->_dbat < 0) return -9999; // no database connection... |
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292 | $db = $this->DB(); |
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293 | |
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294 | return (int) $db->ErrorNo(); |
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295 | } |
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296 | |
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297 | |
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298 | // retrieve ADOConnection from _ADODB_Active_DBs |
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299 | function &DB() |
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300 | { |
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301 | global $_ADODB_ACTIVE_DBS; |
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302 | |
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303 | if ($this->_dbat < 0) { |
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304 | $false = false; |
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305 | $this->Error("No database connection set: use ADOdb_Active_Record::SetDatabaseAdaptor(\$db)", "DB"); |
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306 | return $false; |
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307 | } |
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308 | $activedb = $_ADODB_ACTIVE_DBS[$this->_dbat]; |
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309 | $db =& $activedb->db; |
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310 | return $db; |
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311 | } |
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312 | |
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313 | // retrieve ADODB_Active_Table |
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314 | function &TableInfo() |
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315 | { |
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316 | global $_ADODB_ACTIVE_DBS; |
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317 | |
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318 | $activedb = $_ADODB_ACTIVE_DBS[$this->_dbat]; |
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319 | $table =& $activedb->tables[$this->_tableat]; |
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320 | return $table; |
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321 | } |
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322 | |
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323 | // set a numeric array (using natural table field ordering) as object properties |
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324 | function Set(&$row) |
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325 | { |
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326 | global $ACTIVE_RECORD_SAFETY; |
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327 | |
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328 | $db =& $this->DB(); |
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329 | |
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330 | if (!$row) { |
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331 | $this->_saved = false; |
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332 | return false; |
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333 | } |
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334 | |
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335 | $this->_saved = true; |
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336 | |
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337 | $table =& $this->TableInfo(); |
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338 | if ($ACTIVE_RECORD_SAFETY && sizeof($table->flds) != sizeof($row)) { |
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339 | $this->Error("Table structure of $this->_table has changed","Load"); |
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340 | return false; |
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341 | } |
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342 | |
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343 | $cnt = 0; |
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344 | foreach($table->flds as $name=>$fld) { |
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345 | $this->$name = $row[$cnt]; |
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346 | $cnt += 1; |
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347 | } |
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348 | $this->_original = $row; |
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349 | return true; |
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350 | } |
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351 | |
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352 | // get last inserted id for INSERT |
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353 | function LastInsertID(&$db,$fieldname) |
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354 | { |
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355 | if ($db->hasInsertID) |
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356 | $val = $db->Insert_ID($this->_table,$fieldname); |
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357 | else |
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358 | $val = false; |
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359 | |
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360 | if (is_null($val) || $val === false) { |
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361 | // this might not work reliably in multi-user environment |
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362 | return $db->GetOne("select max(".$fieldname.") from ".$this->_table); |
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363 | } |
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364 | return $val; |
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365 | } |
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366 | |
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367 | // quote data in where clause |
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368 | function doquote(&$db, $val,$t) |
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369 | { |
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370 | switch($t) { |
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371 | case 'D': |
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372 | case 'T': |
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373 | if (empty($val)) return 'null'; |
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374 | |
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375 | case 'C': |
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376 | case 'X': |
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377 | if (is_null($val)) return 'null'; |
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378 | |
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379 | if (strncmp($val,"'",1) != 0 && substr($val,strlen($val)-1,1) != "'") { |
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380 | return $db->qstr($val); |
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381 | break; |
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382 | } |
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383 | default: |
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384 | return $val; |
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385 | break; |
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386 | } |
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387 | } |
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388 | |
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389 | // generate where clause for an UPDATE/SELECT |
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390 | function GenWhere(&$db, &$table) |
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391 | { |
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392 | $keys = $table->keys; |
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393 | $parr = array(); |
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394 | |
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395 | foreach($keys as $k) { |
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396 | $f = $table->flds[$k]; |
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397 | if ($f) { |
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398 | $parr[] = $k.' = '.$this->doquote($db,$this->$k,$db->MetaType($f->type)); |
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399 | } |
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400 | } |
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401 | return implode(' and ', $parr); |
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402 | } |
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403 | |
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404 | |
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405 | //------------------------------------------------------------ Public functions below |
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406 | |
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407 | function Load($where,$bindarr=false) |
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408 | { |
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409 | $db =& $this->DB(); if (!$db) return false; |
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410 | $this->_where = $where; |
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411 | |
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412 | $save = $db->SetFetchMode(ADODB_FETCH_NUM); |
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413 | $row = $db->GetRow("select * from ".$this->_table.' WHERE '.$where,$bindarr); |
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414 | $db->SetFetchMode($save); |
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415 | |
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416 | return $this->Set($row); |
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417 | } |
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418 | |
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419 | // false on error |
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420 | function Save() |
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421 | { |
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422 | if ($this->_saved) $ok = $this->Update(); |
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423 | else $ok = $this->Insert(); |
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424 | |
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425 | return $ok; |
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426 | } |
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427 | |
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428 | // false on error |
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429 | function Insert() |
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430 | { |
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431 | $db =& $this->DB(); if (!$db) return false; |
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432 | $cnt = 0; |
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433 | $table =& $this->TableInfo(); |
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434 | |
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435 | $valarr = array(); |
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436 | $names = array(); |
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437 | $valstr = array(); |
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438 | |
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439 | foreach($table->flds as $name=>$fld) { |
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440 | $val = $this->$name; |
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441 | if(!is_null($val) || !array_key_exists($name, $table->keys)) { |
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442 | $valarr[] = $val; |
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443 | $names[] = $name; |
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444 | $valstr[] = $db->Param($cnt); |
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445 | $cnt += 1; |
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446 | } |
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447 | } |
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448 | |
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449 | if (empty($names)){ |
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450 | foreach($table->flds as $name=>$fld) { |
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451 | $valarr[] = null; |
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452 | $names[] = $name; |
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453 | $valstr[] = $db->Param($cnt); |
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454 | $cnt += 1; |
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455 | } |
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456 | } |
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457 | $sql = 'INSERT INTO '.$this->_table."(".implode(',',$names).') VALUES ('.implode(',',$valstr).')'; |
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458 | $ok = $db->Execute($sql,$valarr); |
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459 | |
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460 | if ($ok) { |
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461 | $this->_saved = true; |
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462 | $autoinc = false; |
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463 | foreach($table->keys as $k) { |
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464 | if (is_null($this->$k)) { |
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465 | $autoinc = true; |
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466 | break; |
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467 | } |
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468 | } |
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469 | if ($autoinc && sizeof($table->keys) == 1) { |
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470 | $k = reset($table->keys); |
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471 | $this->$k = $this->LastInsertID($db,$k); |
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472 | } |
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473 | } |
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474 | |
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475 | $this->_original = $valarr; |
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476 | return !empty($ok); |
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477 | } |
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478 | |
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479 | function Delete() |
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480 | { |
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481 | $db =& $this->DB(); if (!$db) return false; |
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482 | $table =& $this->TableInfo(); |
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483 | |
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484 | $where = $this->GenWhere($db,$table); |
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485 | $sql = 'DELETE FROM '.$this->_table.' WHERE '.$where; |
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486 | $ok = $db->Execute($sql); |
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487 | |
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488 | return $ok ? true : false; |
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489 | } |
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490 | |
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491 | // returns an array of active record objects |
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492 | function &Find($whereOrderBy,$bindarr=false,$pkeysArr=false) |
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493 | { |
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494 | $db =& $this->DB(); if (!$db || empty($this->_table)) return false; |
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495 | $arr =& $db->GetActiveRecordsClass(get_class($this),$this->_table, $whereOrderBy,$bindarr,$pkeysArr); |
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496 | return $arr; |
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497 | } |
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498 | |
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499 | // returns 0 on error, 1 on update, 2 on insert |
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500 | function Replace() |
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501 | { |
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502 | global $ADODB_ASSOC_CASE; |
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503 | |
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504 | $db =& $this->DB(); if (!$db) return false; |
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505 | $table =& $this->TableInfo(); |
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506 | |
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507 | $pkey = $table->keys; |
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508 | |
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509 | foreach($table->flds as $name=>$fld) { |
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510 | $val = $this->$name; |
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511 | /* |
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512 | if (is_null($val)) { |
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513 | if (isset($fld->not_null) && $fld->not_null) { |
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514 | if (isset($fld->default_value) && strlen($fld->default_value)) continue; |
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515 | else { |
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516 | $this->Error("Cannot update null into $name","Replace"); |
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517 | return false; |
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518 | } |
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519 | } |
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520 | }*/ |
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521 | if (is_null($val) && !empty($fld->auto_increment)) { |
---|
522 | continue; |
---|
523 | } |
---|
524 | $t = $db->MetaType($fld->type); |
---|
525 | $arr[$name] = $this->doquote($db,$val,$t); |
---|
526 | $valarr[] = $val; |
---|
527 | } |
---|
528 | |
---|
529 | if (!is_array($pkey)) $pkey = array($pkey); |
---|
530 | |
---|
531 | |
---|
532 | if ($ADODB_ASSOC_CASE == 0) |
---|
533 | foreach($pkey as $k => $v) |
---|
534 | $pkey[$k] = strtolower($v); |
---|
535 | elseif ($ADODB_ASSOC_CASE == 0) |
---|
536 | foreach($pkey as $k => $v) |
---|
537 | $pkey[$k] = strtoupper($v); |
---|
538 | |
---|
539 | $ok = $db->Replace($this->_table,$arr,$pkey); |
---|
540 | if ($ok) { |
---|
541 | $this->_saved = true; // 1= update 2=insert |
---|
542 | if ($ok == 2) { |
---|
543 | $autoinc = false; |
---|
544 | foreach($table->keys as $k) { |
---|
545 | if (is_null($this->$k)) { |
---|
546 | $autoinc = true; |
---|
547 | break; |
---|
548 | } |
---|
549 | } |
---|
550 | if ($autoinc && sizeof($table->keys) == 1) { |
---|
551 | $k = reset($table->keys); |
---|
552 | $this->$k = $this->LastInsertID($db,$k); |
---|
553 | } |
---|
554 | } |
---|
555 | |
---|
556 | $this->_original =& $valarr; |
---|
557 | } |
---|
558 | return $ok; |
---|
559 | } |
---|
560 | |
---|
561 | // returns 0 on error, 1 on update, -1 if no change in data (no update) |
---|
562 | function Update() |
---|
563 | { |
---|
564 | $db =& $this->DB(); if (!$db) return false; |
---|
565 | $table =& $this->TableInfo(); |
---|
566 | |
---|
567 | $where = $this->GenWhere($db, $table); |
---|
568 | |
---|
569 | if (!$where) { |
---|
570 | $this->error("Where missing for table $table", "Update"); |
---|
571 | return false; |
---|
572 | } |
---|
573 | $valarr = array(); |
---|
574 | $neworig = array(); |
---|
575 | $pairs = array(); |
---|
576 | $i = -1; |
---|
577 | $cnt = 0; |
---|
578 | foreach($table->flds as $name=>$fld) { |
---|
579 | $i += 1; |
---|
580 | $val = $this->$name; |
---|
581 | $neworig[] = $val; |
---|
582 | |
---|
583 | if (isset($table->keys[$name])) { |
---|
584 | continue; |
---|
585 | } |
---|
586 | |
---|
587 | if (is_null($val)) { |
---|
588 | if (isset($fld->not_null) && $fld->not_null) { |
---|
589 | if (isset($fld->default_value) && strlen($fld->default_value)) continue; |
---|
590 | else { |
---|
591 | $this->Error("Cannot set field $name to NULL","Update"); |
---|
592 | return false; |
---|
593 | } |
---|
594 | } |
---|
595 | } |
---|
596 | |
---|
597 | if (isset($this->_original[$i]) && $val == $this->_original[$i]) { |
---|
598 | continue; |
---|
599 | } |
---|
600 | $valarr[] = $val; |
---|
601 | $pairs[] = $name.'='.$db->Param($cnt); |
---|
602 | $cnt += 1; |
---|
603 | } |
---|
604 | |
---|
605 | |
---|
606 | if (!$cnt) return -1; |
---|
607 | $sql = 'UPDATE '.$this->_table." SET ".implode(",",$pairs)." WHERE ".$where; |
---|
608 | $ok = $db->Execute($sql,$valarr); |
---|
609 | if ($ok) { |
---|
610 | $this->_original =& $neworig; |
---|
611 | return 1; |
---|
612 | } |
---|
613 | return 0; |
---|
614 | } |
---|
615 | |
---|
616 | function GetAttributeNames() |
---|
617 | { |
---|
618 | $table =& $this->TableInfo(); |
---|
619 | if (!$table) return false; |
---|
620 | return array_keys($table->flds); |
---|
621 | } |
---|
622 | |
---|
623 | }; |
---|
624 | |
---|
625 | ?> |
---|