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<?php |
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/** |
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* Adds a new field to the mysql table which can hold the result |
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* of a "virtual field" (i.e. method call on the model or relation). |
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* |
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* Usage (config.yml): |
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* |
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* Product: |
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* extensions: |
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* - VirtualFieldIndex |
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* VirtualFieldIndex |
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* vfi_spec: |
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* Product: |
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* Price: |
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* Type: simple |
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* Source: sellingPrice |
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* DependsOn: BasePrice |
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* DBField: Currency |
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* Categories: |
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* Type: list |
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* DependsOn: all |
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* Source: |
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* - ParentID |
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* - ProductCategories.ID |
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* |
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* The above will create two new fields on Product: VFI_Price and VFI_Categories. |
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* These will be updated whenever the object is changed and can be triggered via |
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* a build task (dev/tasks/BuildVFI). |
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* |
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* The categories index will contain the merging of results from ParentID and |
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* ProductCategories.ID in the form of a comma-delimited list. |
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* |
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* NOTE: having multiple sources doesn't equate with Type=list always. That's |
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* just the default. Type=list means the output is a list. A single source could |
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* also return an array and that would be a list as well. |
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* |
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* @author Mark Guinn <[email protected]> |
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* @date 09.25.2013 |
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* @package shop_search |
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* @subpackage helpers |
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*/ |
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class VirtualFieldIndex extends DataExtension |
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{ |
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const TYPE_LIST = 'list'; |
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const TYPE_SIMPLE = 'simple'; |
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const DEPENDS_ALL = 'all'; |
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const DEPENDS_NONE = 'none'; |
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/** @var array - central config for all models */ |
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private static $vfi_spec = array(); |
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/** @var bool - if you set this to true it will write to both live and stage using DB::query and save some time, possibly */ |
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private static $fast_writes_enabled = false; |
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/** @var bool - used to prevent an infinite loop in onBeforeWrite */ |
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protected $isRebuilding = false; |
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public static $disable_building = false; |
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/** |
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* @return array |
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*/ |
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public static function get_classes_with_vfi() |
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{ |
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$vfi_def = Config::inst()->get('VirtualFieldIndex', 'vfi_spec'); |
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if (!$vfi_def || !is_array($vfi_def)) { |
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return array(); |
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} |
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return array_keys($vfi_def); |
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} |
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/** |
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* Define extra db fields and indexes. |
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* @param $class |
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* @param $extension |
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* @param $args |
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* @return array |
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*/ |
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public static function get_extra_config($class, $extension, $args) |
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{ |
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$vfi_def = self::get_vfi_spec($class); |
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if (!$vfi_def || !is_array($vfi_def)) { |
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return array(); |
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} |
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$out = array( |
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'db' => array(), |
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'indexes' => array(), |
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); |
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foreach ($vfi_def as $field => $spec) { |
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$fn = 'VFI_' . $field; |
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$out['db'][$fn] = isset($spec['DBField']) ? $spec['DBField'] : 'Varchar(255)'; |
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$out['indexes'][$fn] = true; |
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} |
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return $out; |
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} |
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/** |
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* Return a normalized version of the vfi definition for a given class |
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* @param string $class |
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* @return array |
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*/ |
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public static function get_vfi_spec($class) |
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{ |
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$vfi_master = Config::inst()->get('VirtualFieldIndex', 'vfi_spec'); |
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if (!$vfi_master || !is_array($vfi_master)) { |
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return array(); |
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} |
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// merge in all the vfi's from ancestors as well |
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$vfi_def = array(); |
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foreach (ClassInfo::ancestry($class) as $c) { |
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if (!empty($vfi_master[$c])) { |
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// we want newer classes to override parent classes so we do it this way |
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$vfi_def = $vfi_master[$c] + $vfi_def; |
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} |
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} |
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if (empty($vfi_def)) { |
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return array(); |
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} |
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// convert shorthand to longhand |
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foreach ($vfi_def as $k => $v) { |
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if (is_numeric($k)) { |
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$vfi_def[$v] = $v; |
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unset($vfi_def[$k]); |
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} elseif (is_string($v)) { |
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$vfi_def[$k] = array( |
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'Type' => self::TYPE_SIMPLE, |
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'DependsOn' => self::DEPENDS_ALL, |
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'Source' => $v, |
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); |
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} elseif (is_array($v) && !isset($vfi_def[$k]['Source'])) { |
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$vfi_def[$k] = array( |
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'Type' => self::TYPE_LIST, |
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'DependsOn' => self::DEPENDS_ALL, |
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'Source' => $v, |
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); |
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} else { |
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if (!isset($v['Type'])) { |
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$vfi_def[$k]['Type'] = is_array($v['Source']) ? self::TYPE_LIST : self::TYPE_SIMPLE; |
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} |
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if (!isset($v['DependsOn'])) { |
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$vfi_def[$k]['DependsOn'] = self::DEPENDS_ALL; |
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} |
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} |
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} |
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return $vfi_def; |
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} |
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/** |
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* Rebuilds any vfi fields on one class (or all). Doing it in chunks means a few more |
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* queries but it means we can handle larger datasets without storing everything in memory. |
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* |
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* @param string $class [optional] - if not given all indexes will be rebuilt |
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*/ |
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public static function build($class='') |
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{ |
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if ($class) { |
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$list = DataObject::get($class); |
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$count = $list->count(); |
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for ($i = 0; $i < $count; $i += 10) { |
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$chunk = $list->limit(10, $i); |
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// if (Controller::curr() instanceof TaskRunner) echo "Processing VFI #$i...\n"; |
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foreach ($chunk as $rec) { |
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$rec->rebuildVFI(); |
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} |
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} |
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} else { |
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foreach (self::get_classes_with_vfi() as $c) { |
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self::build($c); |
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} |
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} |
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} |
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/** |
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* Rebuild all vfi fields. |
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*/ |
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public function rebuildVFI($field = '') |
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{ |
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if ($field) { |
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$this->isRebuilding = true; |
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$spec = $this->getVFISpec($field); |
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$fn = $this->getVFIFieldName($field); |
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$val = $this->getVFI($field, true); |
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if ($spec['Type'] == self::TYPE_LIST) { |
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if (is_object($val)) { |
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$val = $val->toArray(); |
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} // this would be an ArrayList or DataList |
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if (!is_array($val)) { |
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$val = array($val); |
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} // this would be a scalar value |
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$val = self::encode_list($val); |
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} else { |
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if (is_array($val)) { |
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$val = (string)$val[0]; |
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} // if they give us an array, just take the first value |
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if (is_object($val)) { |
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$val = (string)$val->first(); |
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} // if a SS_List, take the first as well |
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} |
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if (Config::inst()->get('VirtualFieldIndex', 'fast_writes_enabled')) { |
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// NOTE: this is usually going to be bad practice, but if you |
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// have a lot of products and a lot of on...Write handlers that |
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// can get tedious really quick. This is just here as an option. |
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$table = ''; |
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foreach ($this->owner->getClassAncestry() as $ancestor) { |
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if (DataObject::has_own_table($ancestor)) { |
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$sing = singleton($ancestor); |
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if ($sing->hasOwnTableDatabaseField($fn)) { |
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$table = $ancestor; |
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break; |
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} |
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} |
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} |
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if (!empty($table)) { |
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DB::query($sql = sprintf("UPDATE %s SET %s = '%s' WHERE ID = '%d'", $table, $fn, Convert::raw2sql($val), $this->owner->ID)); |
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DB::query(sprintf("UPDATE %s_Live SET %s = '%s' WHERE ID = '%d'", $table, $fn, Convert::raw2sql($val), $this->owner->ID)); |
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$this->owner->setField($fn, $val); |
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} else { |
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// if we couldn't figure out the right table, fall back to the old fashioned way |
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$this->owner->setField($fn, $val); |
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$this->owner->write(); |
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} |
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} else { |
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$this->owner->setField($fn, $val); |
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$this->owner->write(); |
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} |
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$this->isRebuilding = false; |
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} else { |
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// rebuild all fields if they didn't specify |
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4 |
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foreach ($this->getVFISpec() as $field => $spec) { |
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240
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$this->rebuildVFI($field); |
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4 |
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} |
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} |
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243
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8 |
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} |
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244
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245
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/** |
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246
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* @param $name |
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247
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* @return string |
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248
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*/ |
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249
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8 |
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public function getVFIFieldName($name) |
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250
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{ |
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251
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8 |
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return 'VFI_' . $name; |
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252
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} |
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253
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254
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255
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/** |
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256
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* @param string $field [optional] |
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257
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* @return array|false |
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258
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*/ |
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259
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8 |
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public function getVFISpec($field = '') |
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260
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{ |
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261
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8 |
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$spec = self::get_vfi_spec($this->owner->class); |
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262
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8 |
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if ($field) { |
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263
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8 |
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return empty($spec[$field]) ? false : $spec[$field]; |
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264
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} else { |
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265
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8 |
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return $spec; |
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266
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} |
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267
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} |
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268
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269
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270
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/** |
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271
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* @param string $field |
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272
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* @param bool $fromSource [optional] - if true, it will regenerate the data from the source fields |
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273
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* @param bool $forceIDs [optional] - if true, it will return an ID even if the norm is to return a DataObject |
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274
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* @return string|array|SS_List |
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275
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*/ |
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276
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8 |
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public function getVFI($field, $fromSource=false, $forceIDs=false) |
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277
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{ |
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278
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8 |
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$spec = $this->getVFISpec($field); |
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279
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8 |
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if (!$spec) { |
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280
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1 |
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return null; |
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281
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} |
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282
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8 |
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if ($fromSource) { |
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283
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8 |
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if (is_array($spec['Source'])) { |
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284
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8 |
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$out = array(); |
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285
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8 |
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foreach ($spec['Source'] as $src) { |
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286
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8 |
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$myOut = self::get_value($src, $this->owner); |
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287
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8 |
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if (is_array($myOut)) { |
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288
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$out = array_merge($out, $myOut); |
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289
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8 |
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} elseif (is_object($myOut) && $myOut instanceof SS_List) { |
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290
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8 |
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$out = array_merge($out, $myOut->toArray()); |
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291
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8 |
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} else { |
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292
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8 |
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$out[] = $myOut; |
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293
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} |
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294
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8 |
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} |
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295
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8 |
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return $out; |
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296
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} else { |
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297
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8 |
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return self::get_value($spec['Source'], $this->owner); |
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298
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} |
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299
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} else { |
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300
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3 |
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$val = $this->owner->getField($this->getVFIFieldName($field)); |
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301
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3 |
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if ($spec['Type'] == self::TYPE_LIST) { |
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302
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3 |
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return self::decode_list($val, $forceIDs); |
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303
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} else { |
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304
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1 |
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return $val; |
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305
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} |
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306
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} |
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307
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} |
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308
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309
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310
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/** |
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311
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* Template version |
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312
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* @param string $field |
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313
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|
* @return string|array|SS_List |
|
314
|
|
|
*/ |
|
315
|
|
|
public function VFI($field) |
|
316
|
|
|
{ |
|
317
|
|
|
return $this->getVFI($field); |
|
318
|
|
|
} |
|
319
|
|
|
|
|
320
|
|
|
|
|
321
|
|
|
/** |
|
322
|
|
|
* @param array $list |
|
323
|
|
|
* @return string |
|
324
|
|
|
*/ |
|
325
|
8 |
|
protected static function encode_list(array $list) |
|
326
|
|
|
{ |
|
327
|
|
|
// If we've got objects, encode them a little differently |
|
328
|
8 |
|
if (count($list) > 0 && is_object($list[0])) { |
|
329
|
8 |
|
$ids = array(); |
|
330
|
8 |
|
foreach ($list as $rec) { |
|
331
|
8 |
|
$ids[] = $rec->ID; |
|
332
|
8 |
|
} |
|
333
|
8 |
|
$val = '>' . $list[0]->ClassName . '|' . implode('|', $ids) . '|'; |
|
334
|
8 |
|
} else { |
|
335
|
|
|
$val = '|' . implode('|', $list) . '|'; |
|
336
|
|
|
} |
|
337
|
|
|
|
|
338
|
8 |
|
return $val; |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
|
|
342
|
|
|
/** |
|
343
|
|
|
* @param string $val |
|
344
|
|
|
* @param bool $forceIDs [optional] - if true encoded objects will not be returned as objects but as id's |
|
345
|
|
|
* @return array |
|
346
|
|
|
*/ |
|
347
|
8 |
|
protected static function decode_list($val, $forceIDs=false) |
|
348
|
|
|
{ |
|
349
|
3 |
|
if ($val[0] == '>') { |
|
350
|
3 |
|
$firstBar = strpos($val, '|'); |
|
351
|
3 |
|
if ($firstBar < 3) { |
|
352
|
|
|
return array(); |
|
353
|
|
|
} |
|
354
|
3 |
|
$className = substr($val, 1, $firstBar-1); |
|
355
|
8 |
|
$ids = explode('|', trim(substr($val, $firstBar), '|')); |
|
356
|
3 |
|
return $forceIDs ? $ids : DataObject::get($className)->filter('ID', $ids)->toArray(); |
|
357
|
|
|
} else { |
|
358
|
|
|
return explode('|', trim($val, '|')); |
|
359
|
|
|
} |
|
360
|
|
|
} |
|
361
|
|
|
|
|
362
|
|
|
|
|
363
|
|
|
/** |
|
364
|
|
|
* This is largely borrowed from DataObject::relField, but |
|
365
|
|
|
* adapted to work with many-many and has-many fields. |
|
366
|
|
|
* @param string $fieldName |
|
367
|
|
|
* @param DataObject $rec |
|
368
|
|
|
* @return mixed |
|
369
|
|
|
*/ |
|
370
|
8 |
|
protected static function get_value($fieldName, DataObject $rec) |
|
371
|
|
|
{ |
|
372
|
8 |
|
$component = $rec; |
|
373
|
|
|
|
|
374
|
|
|
// We're dealing with relations here so we traverse the dot syntax |
|
375
|
8 |
|
if (strpos($fieldName, '.') !== false) { |
|
376
|
|
|
$relations = explode('.', $fieldName); |
|
377
|
|
|
$fieldName = array_pop($relations); |
|
378
|
|
|
foreach ($relations as $relation) { |
|
379
|
|
|
// Inspect $component for element $relation |
|
380
|
|
|
if ($component->hasMethod($relation)) { |
|
381
|
|
|
// Check nested method |
|
382
|
|
|
$component = $component->$relation(); |
|
383
|
|
|
} elseif ($component instanceof SS_List) { |
|
384
|
|
|
// Select adjacent relation from DataList |
|
385
|
|
|
$component = $component->relation($relation); |
|
386
|
|
|
} elseif ($component instanceof DataObject && ($dbObject = $component->dbObject($relation))) { |
|
387
|
|
|
// Select db object |
|
388
|
|
|
$component = $dbObject; |
|
389
|
|
|
} else { |
|
390
|
|
|
user_error("$relation is not a relation/field on ".get_class($component), E_USER_ERROR); |
|
391
|
|
|
} |
|
392
|
|
|
} |
|
393
|
|
|
} |
|
394
|
|
|
|
|
395
|
|
|
// Bail if the component is null |
|
396
|
8 |
|
if (!$component) { |
|
397
|
|
|
return null; |
|
398
|
8 |
|
} elseif ($component instanceof SS_List) { |
|
399
|
|
|
return $component->column($fieldName); |
|
400
|
8 |
|
} elseif ($component->hasMethod($fieldName)) { |
|
401
|
8 |
|
return $component->$fieldName(); |
|
402
|
|
|
} else { |
|
403
|
|
|
return $component->$fieldName; |
|
404
|
|
|
} |
|
405
|
|
|
} |
|
406
|
|
|
|
|
407
|
|
|
/** |
|
408
|
|
|
* Trigger rebuild if needed |
|
409
|
|
|
*/ |
|
410
|
8 |
|
public function onBeforeWrite() |
|
411
|
|
|
{ |
|
412
|
8 |
|
if ($this->isRebuilding || self::$disable_building) { |
|
413
|
8 |
|
return; |
|
414
|
|
|
} |
|
415
|
|
|
|
|
416
|
8 |
|
$queueFields = interface_exists('QueuedJob') ? array() : false; |
|
417
|
|
|
|
|
418
|
8 |
|
foreach ($this->getVFISpec() as $field => $spec) { |
|
|
|
|
|
|
419
|
8 |
|
$rebuild = false; |
|
420
|
|
|
|
|
421
|
8 |
|
if ($spec['DependsOn'] == self::DEPENDS_NONE) { |
|
422
|
|
|
continue; |
|
423
|
8 |
|
} elseif ($spec['DependsOn'] == self::DEPENDS_ALL) { |
|
424
|
8 |
|
$rebuild = true; |
|
425
|
8 |
|
} elseif (is_array($spec['DependsOn'])) { |
|
426
|
|
|
foreach ($spec['DependsOn'] as $f) { |
|
427
|
|
|
if ($this->owner->isChanged($f)) { |
|
428
|
|
|
$rebuild = true; |
|
429
|
|
|
break; |
|
430
|
|
|
} |
|
431
|
|
|
} |
|
432
|
|
|
} else { |
|
433
|
8 |
|
if ($this->owner->isChanged($spec['DependsOn'])) { |
|
434
|
|
|
$rebuild = true; |
|
435
|
|
|
} |
|
436
|
|
|
} |
|
437
|
|
|
|
|
438
|
8 |
|
if ($rebuild) { |
|
439
|
8 |
|
if ($queueFields === false) { |
|
440
|
8 |
|
$this->rebuildVFI($field); |
|
441
|
8 |
|
} else { |
|
442
|
|
|
$queueFields[] = $field; |
|
443
|
|
|
} |
|
444
|
8 |
|
} |
|
445
|
8 |
|
} |
|
446
|
|
|
|
|
447
|
|
|
// if the queued-jobs module is present, then queue up the rebuild |
|
448
|
8 |
|
if ($queueFields) { |
|
449
|
|
|
$job = new VirtualFieldIndexQueuedJob($this->owner, $queueFields); |
|
450
|
|
|
$job->triggerProcessing(); |
|
451
|
|
|
} |
|
452
|
8 |
|
} |
|
453
|
|
|
} |
|
454
|
|
|
|
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.