/**
* 使用 Bill 模型实例填充表单。用于 Update 方法。
*
* @param Bill $bill
* @param array $fields
*
* @return array
*/
protected function fieldsFromModel(Bill $bill, array $fields)
{
$fieldNames = array_keys(array_except($fields, ['categories']));
$fields = ['id' => $this->bill->id];
foreach ($fieldNames as $field) {
$fields[$field] = $bill->{$field};
}
$fields['categories'] = $bill->categories()->lists('name')->all();
return $fields;
}
