/**
* Retrieves form fields configuration. Fields can be config arrays, ActiveField objects or closures.
*
* @param \yii\base\Model|\netis\crud\db\ActiveRecord $model
* @param array $fields
* @param bool $multiple true for multiple values inputs, usually used for search forms
* @param array $hiddenAttributes list of attribute names to render as hidden fields
*
* @return array form fields
* @throws InvalidConfigException
*/
public static function getFormFields($model, $fields, $multiple = false, $hiddenAttributes = [])
{
if (!$model instanceof \yii\db\ActiveRecord) {
return $model->safeAttributes();
}
$keys = Action::getModelKeys($model);
$hiddenAttributes = array_flip($hiddenAttributes);
list($behaviorAttributes, $blameableAttributes) = Action::getModelBehaviorAttributes($model);
$attributes = $model->safeAttributes();
$relations = $model->relations();
if (($versionAttribute = $model->optimisticLock()) !== null) {
$hiddenAttributes[$versionAttribute] = true;
}
$formFields = [];
foreach ($fields as $key => $field) {
if ($field instanceof ActiveField) {
$formFields[$key] = $field;
continue;
} elseif (!is_string($field) && is_callable($field)) {
$formFields[$key] = call_user_func($field, $model);
if (!is_string($formFields[$key])) {
throw new InvalidConfigException('Field definition must be either an ActiveField or a callable.');
}
continue;
} elseif (!is_string($field)) {
throw new InvalidConfigException('Field definition must be either an ActiveField or a callable.');
}
$attributeName = Html::getAttributeName($field);
if (in_array($attributeName, $relations)) {
$formFields = static::addRelationField($formFields, $model, $field, $hiddenAttributes, $attributes, $multiple);
} elseif (in_array($attributeName, $attributes)) {
if (in_array($attributeName, $keys) || in_array($attributeName, $behaviorAttributes)) {
continue;
}
$formFields = static::addFormField($formFields, $model, $field, $hiddenAttributes, $multiple);
}
}
return $formFields;
}