Returns relationship that property represents
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public getRelationship ( ) : LeanMapper\Relationship\BelongsToMany | LeanMapper\Relationship\BelongsToOne | |
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| return | LeanMapper\Relationship\BelongsToMany | LeanMapper\Relationship\BelongsToOne | |
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private function traverseToRelatedEntity(&$currentTable, &$currentTableAlias, Property $property)
{
if (!$property->hasRelationship()) {
$entityClass = $this->mapper->getEntityClass($currentTable);
throw new InvalidRelationshipException("Property '{$property->getName()}' in entity '{$entityClass}' doesn't have any relationship.");
}
$implicitFilters = array();
$propertyType = $property->getType();
if (is_subclass_of($propertyType, 'LeanMapper\\Entity')) {
$caller = new Caller($this, $property);
$implicitFilters = $this->mapper->getImplicitFilters($property->getType(), $caller);
}
$relationship = $property->getRelationship();
if ($relationship instanceof Relationship\HasOne) {
$targetTable = $relationship->getTargetTable();
$targetTablePrimaryKey = $this->mapper->getPrimaryKey($targetTable);
$referencingColumn = $relationship->getColumnReferencingTargetTable();
// Join table.
$targetTableAlias = $this->joinRelatedTable($currentTableAlias, $referencingColumn, $targetTable, $targetTablePrimaryKey, $implicitFilters, FALSE);
} elseif ($relationship instanceof Relationship\BelongsTo) {
// BelongsToOne, BelongsToMany
$targetTable = $relationship->getTargetTable();
$sourceTablePrimaryKey = $this->mapper->getPrimaryKey($currentTable);
$referencingColumn = $relationship->getColumnReferencingSourceTable();
// Join table.
$targetTableAlias = $this->joinRelatedTable($currentTableAlias, $sourceTablePrimaryKey, $targetTable, $referencingColumn, $implicitFilters);
} elseif ($relationship instanceof Relationship\HasMany) {
$sourceTablePrimaryKey = $this->mapper->getPrimaryKey($currentTable);
$relationshipTable = $relationship->getRelationshipTable();
$sourceReferencingColumn = $relationship->getColumnReferencingSourceTable();
$targetReferencingColumn = $relationship->getColumnReferencingTargetTable();
$targetTable = $relationship->getTargetTable();
$targetTablePrimaryKey = $this->mapper->getPrimaryKey($targetTable);
// Join tables.
// Don't apply filters on relationship table.
$relationshipTableAlias = $this->joinRelatedTable($currentTableAlias, $sourceTablePrimaryKey, $relationshipTable, $sourceReferencingColumn);
$targetTableAlias = $this->joinRelatedTable($relationshipTableAlias, $targetReferencingColumn, $targetTable, $targetTablePrimaryKey, $implicitFilters, FALSE);
} else {
throw new InvalidRelationshipException('Unknown relationship type. ' . get_class($relationship) . ' given.');
}
$currentTable = $targetTable;
$currentTableAlias = $targetTableAlias;
return $this->getPropertiesByTable($targetTable);
}