HABTM在CakePHP中的形式验证 [英] HABTM form validation in CakePHP

问题描述

我有一个Projects表和一个Users表，它们通过HABTM关系链接。在添加新项目页面中，我有一个多个复选框部分为新项目选择用户。我想为项目至少有一个用户。

I have a Projects table and a Users table which are linked by a HABTM relation. In the "add" new Project page I have a multiple checkbox section to select Users for the new project. I want to have at least one User for the Project. What's the best way to approach this in CakePHP ?

推荐答案

尝试这样：

// app/models/project.php
/**
 * An additional validation check to ensure at least one User is
 * selected. Spoofs Cake into thinking that there are validation
 * errors on the Project model by invalidating a non-existent field
 * on the Project model, then also invalidates the habtm field as
 * well, so when the form is re-displayed, the error is displayed
 * on the User field.
 **/
function beforeValidate() {
  if (!isset($this->data['User']['User'])
  || empty($this->data['User']['User'])) {
    $this->invalidate('non_existent_field'); // fake validation error on Project
    $this->User->invalidate('User', 'Please select at least one user');
  }
  return true;
}

这篇关于HABTM在CakePHP中的形式验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！