/** * Validate related class and inverse on a field map * @param epFieldMap $fm the field map to be checked * @param string $class the name of the class that the field belongs to * @return array (errors) */ protected function _validateRelationshipField(&$fm, $class) { // array to hold error messages $errors = array(); // // 1. check the opposite class for the field // // string for class and field $class_field = '[' . $class . '::' . $fm->getName() . ']'; // does the relation field have the related class defined? if (!($rclass = $fm->getClass())) { // shouldn't happend $errors[] = $class_field . ' does not have opposite class specified'; return $errors; } // does the related class exist? if (!isset($this->class_maps[$rclass])) { // alert if not $errors[] = 'Class [' . $rclass . '] for ' . $class_field . ' does not exist'; return $errors; } // // 2. check inverse of the field // // does this field have an inverse? if (!($inverse = $fm->getInverse())) { return $errors; } // get the related class map $rcm = $this->class_maps[$rclass]; // get all fields point to the current class in the related class $rfields = $rcm->getFieldsOfClass($class); // 2.a. default inverse (that is, set to true) if (true === $inverse) { // the related class must have only one relationship var to the current class if (!$rfields) { $errors[] = 'No inverse found for ' . $class_field; } else { if (count($rfields) > 1) { $errors[] = 'Ambiguilty in the inverse of ' . $class_field; } else { $rfms = array_values($rfields); $fm->setInverse($rfms[0]->getName()); $rfms[0]->setInverse($fm->getName()); } } return $errors; } // 2.b. inverse is specified // check if inverse exists if (!isset($rfields[$fm->getClass() . ':' . $inverse]) || !$rfields[$fm->getClass() . ':' . $inverse]) { $errors[] = 'Inverse of ' . $class_field . ' (' . $fm->getClass() . '::' . $inverse . ') does not exist'; return $errors; } // get the field map for the inverse $rfm = $rfields[$fm->getClass() . ':' . $inverse]; // set up the inverse on the other side -only if- inverse on the other side // is -not- already set or set to default if (!($rinverse = $rfm->getInverse()) || $rinverse === true) { $rfm->setInverse($fm->getName()); return $errors; } // if specified, check duality if ($class != $rfm->getClass() || $rinverse != $fm->getName()) { $errors[] = 'Inverse of [' . $rcm->getName() . '::' . $fm->getName() . '] is not specified as ' . $class_field; } return $errors; }
/** * Checks if the value to be set matches the type set in the field map * @param epObject|string $value The value to be set * @param epFieldMap $fm The field map for the value * @return bool */ protected function _typeMatches($value, $fm) { // no check if no manager if (!$this->ep_m) { return true; } // no checking on primitve, ignore false|null|empty, and non-epObject if ($fm->isPrimitive() || !$value) { // always true return true; } // epObject if ($value instanceof epObject) { return $this->_isClassOf($this->ep_m->getClass($value), $fm->getClass()); } else { if (is_array($value) || $value instanceof epArray) { foreach ($value as $k => $v) { if (!$v instanceof epObject) { continue; } if (!$this->_isClassOf($this->ep_m->getClass($v), $fm->getClass())) { return false; } } return true; } } return true; }
/** * Make where part of a SQL select for relationship fields * @param epDbObject $db the db connection * @param epFieldMap $fm the field map * @param epClassMap $cm the child object for query * @param string $alias the alias of this table in the previous part * @return array('from', 'where') * @author Oak Nauhygon <*****@*****.**> * @author Trevan Richins <*****@*****.**> */ public static function sqlSelectRelations($db, $fm, $cm, $table, $alias, $parentTable) { $base_a = $fm->getClassMap()->getName(); $class_a = $cm->getName(); $var_a = $fm->getName(); $base_b = $fm->getClass(); // call manager to get relation table for base class a and b $rt = epManager::instance()->getRelationTable($base_a, $base_b); // the alias of the table we are dealing with right now $tbAlias = '_' . $alias; $rtAlias = 'rt' . $alias; // quoted aliases (avoid repeating) $tbAlias_q = $db->quoteId($tbAlias); $rtAlias_q = $db->quoteId($rtAlias); // compute 'from' parts: tables with aliases $from = array(); $from[] = $db->quoteId($table) . ' AS ' . $tbAlias_q; $from[] = $db->quoteId($rt) . ' AS ' . $rtAlias_q; // compute expressions 'where' $where = array(); // rt.class_a = $where[] = $rtAlias_q . '.' . $db->quoteId('class_a') . ' = ' . $db->quote($class_a); // rt.var_a = $where[] = $rtAlias_q . '.' . $db->quoteId('var_a') . ' = ' . $db->quote($var_a); // rt.base_b = $where[] = $rtAlias_q . '.' . $db->quoteId('base_b') . ' = ' . $db->quote($base_b); // rt.class_b = TODO: doesn't look like it is used //$where .= 'rt.'.$db->quoteId('class_b') . ' = ' . $db->quote($val->getClass()); // A.oid = rt.oid_a $where[] = $db->quoteId($parentTable) . '.' . $db->quoteId($cm->getOidColumn()) . ' = ' . $rtAlias_q . '.' . $db->quoteId('oid_a'); // Child.oid = rt.oid_b $where[] = $tbAlias_q . '.' . $db->quoteId($fm->getClassMap()->getOidColumn()) . ' = ' . $rtAlias_q . '.' . $db->quoteId('oid_b'); return array('from' => $from, 'where' => $where); }
/** * Returns the relation ids for the variable specified of the object * @param epObject $o the object * @param epFieldMap $fm the field map of the variable * @param epClassMap $cm the class map of the object * @return false|string|array */ public function getRelationIds(&$o, $fm, $cm) { // make sure we are dealing with valid object and non-primitive field if (!$o || !$fm || !$cm) { return false; } // object needs to have a valid id and has to be non-primitive if (!($oid_a = $o->epGetObjectId())) { return false; } // get class_a, var_a, and the related class $base_a = $fm->getClassMap()->getName(); $class_a = $cm->getName(); $var_a = $fm->getName(); $base_b = $fm->getClass(); if (!$base_a || !$class_a || !$var_a || !$base_b) { throw new epExceptionManager('Cannot find related class for var [' . $class_a . '::' . $var_a . ']'); return false; } // switch relations table $this->_setRelationTable($base_a, $base_b); // make an example relation objects if (!($eo =& $this->_relationExample($class_a, $oid_a, $var_a, $base_b))) { return false; } // find all relation objects using the example object $rs =& parent::find($eo, EP_GET_FROM_DB, false); // find from db only, false no cache // convert result into oids $oids_b = null; if ($fm->isSingle()) { if (is_array($rs) && count($rs) > 1) { throw new epExceptionManager('Field ' . $fm->getName() . ' mapped as composed_of_/has_one but is associated with > 1 objects'); return false; } if ($rs) { $oids_b = $this->_encodeClassOid($rs[0]->get_class_b(), $rs[0]->get_oid_b()); } } else { if ($fm->isMany()) { $oids_b = array(); if ($rs) { foreach ($rs as $r) { $oids_b[] = $this->_encodeClassOid($r->get_class_b(), $r->get_oid_b()); } } } } return $oids_b; }
/** * Builds SQL statement from 'contains' or alias assignment node * @param epQueryNode &$node either a 'contains' node or an assignment node * @param epFieldMap $fm the starting field map * @param array $var_exprs expressions for var * @param array|epObject $arg the argument|value for the operation * @return false|string * @throws epExceptionQueryBuilder */ protected function _buildSqlRelationship(epQueryNode &$node, $fm, $var_exprs, $arg) { // is arg a string if (is_string($arg)) { // go through each where (notice &) foreach ($var_exprs as $alias => &$expr) { // remove last alias $expr = str_replace($alias, $arg, $expr); // remove this alias (important) unset($this->aliases[$alias]); } return implode(' OR ', $var_exprs); } else { if (is_array($arg) || $arg instanceof epObject) { // convert array to an object $o = $arg; if (is_array($arg)) { // false: no event dispatching, true: null vars if no value $o =& $this->em->createFromArray($fm->getClass(), $arg, false, true); // object and children not to be committed $o->epSetCommittable(false, true); } // array to keep all expressions $exprs = array(); // go through each var exprs foreach ($var_exprs as $var_alias => $var_expr) { // build sql for array or object $obj_exprs = $this->_buildSqlObject($o, $fm, $var_alias); // go through each returned expr from the array or object foreach ($obj_exprs as $obj_expr) { $exprs[] = $obj_expr . ' AND ' . $var_expr; } } return implode(' OR ', $exprs); } } // unrecognized throw new epExceptionQueryBuilder($this->_e("Unrecognized argument in 'contains()'", $node)); return false; }