原则2：复杂关系中的实体保存

本文介绍了原则2：复杂关系中的实体保存的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的学说实体之间有以下关系：

I have the following relationships within my doctrine entities:

FavoriteRecipe

/** * @ManyToOne(targetEntity="User", inversedBy="favoriteRecipes") */ private $user; /** * @ManyToOne(targetEntity="Recipe", inversedBy="favoriteRecipes") */ private $recipe;

配方

/** * @OneToMany(targetEntity="FavoriteRecipe", mappedBy="user") */ private $favoriteRecipes;

用户

/** * @OneToMany(targetEntity="FavoriteRecipe", mappedBy="user") */ private $favoriteRecipes;

在我的一个控制器中，我有以下代码：

In one of my controllers I have the following code:

$favoriteRecipe = new \Entities\FavoriteRecipe(); $favoriteRecipe->setRecipe($recipe); $favoriteRecipe->setUser($user); $this->_em->persist($favoriteRecipe); $this->_em->flush();

但是，这会引发异常，并显示以下消息：

But this throws an exception with the following message:

通过没有配置的关系来发现一个新的实体级联持久化操作： Entities\User @ 00000000408bd010000000007cb1380e。明确地坚持新实体或在关系上配置级联持久性操作。

A new entity was found through a relationship that was not configured to cascade persist operations: Entities\User@00000000408bd010000000007cb1380e. Explicitly persist the new entity or configure cascading persist operations on the relationship.

我正确地创建并保存一个 FavoriteRecipe 实体？

How can I correctly create and save a FavoriteRecipe entity?

推荐答案

您是否为所有关系实体设置了级联选项？这是通过设置cascade属性为excample来实现的：cascade = {persist，remove}

Did you set the cascade option for all your relational entities? This is done by setting the cascade property for excample: cascade={"persist", "remove"}

也许这个页面： www.doctrine-project/docs/orm/2.0/ en / reference / working-with-associations.html

或这些视频： www.zendcasts/many-to-many-with-doctrine-2/2011/ 03 / http： //www.zendcasts/one-to-many-with-doctrine-2/2011/03/