public static function parseRelationDetails($field, $model_name)
{
// parse the body of the relator method and
// get the relation type, related model name,
// intermediate model name (if many to many),
// and custom key field names (if any)
list($relator_mtd, $related_model_field) = explode('.', $field);
list($relator_mtd_body, $relator_mtd_doccomment) = Helpers::getMethodBodyAndDocComment($model_name, $relator_mtd);
// parse doc comment and get @filter helper, if any
if (preg_match('/@filter ([\\w=&,]+)/', $relator_mtd_doccomment, $matches)) {
$filters = explode('&', $matches[1]);
} else {
$filters = array();
}
// parse the function body and get relation_type,
// related model name, intermediate table name,
// and keys, if any.
$match = preg_match('/return \\$this->([\\w_]+)\\(([\'"\\w,\\s]+)/', $relator_mtd_body, $matches);
list($full_match, $rel_type, $args) = $matches;
$args = array_map(function ($x) {
return trim($x, ' \'');
}, explode(',', $args));
$related_model_name = array_shift($args);
$related_full_model_name = Model::$auto_prefix_models . $related_model_name;
list($inter_model_name, $key1, $key2) = array(null, null, null);
switch ($rel_type) {
case 'belongs_to':
list($key1) = array_merge($args, array(null));
$key1 = Model::buildForeignKeyName($key1, $related_full_model_name);
break;
case 'has_one':
case 'has_many':
list($key1) = array_merge($args, array(null));
$key1 = Model::buildForeignKeyName($key1, $model_name);
break;
case 'has_many_through':
list($inter_model_name, $key1, $key2) = array_merge($args, array(null, null, null));
$inter_model_name = Model::buildJoinClassName($inter_model_name, $model_name, $related_full_model_name);
$key1 = Model::buildForeignKeyName($key1, $model_name);
$key2 = Model::buildForeignKeyName($key2, $related_model_name);
break;
}
return array('relator_mtd' => $relator_mtd, 'related_model_field' => $related_model_field, 'type' => $rel_type, 'related_model_name' => $related_model_name, 'inter_model_name' => $inter_model_name, 'key1' => $key1, 'key2' => $key2, 'filters' => $filters);
}
