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        如何在不加入doctrine2的情况下获得id?

        How to get an id without join in doctrine2?(如何在不加入doctrine2的情况下获得id?)

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                • 本文介绍了如何在不加入doctrine2的情况下获得id?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跟版网的小编来一起学习吧!

                  问题描述

                  我有这样的实体:

                  /**
                   *
                   * @Table(name="table")
                   * @Entity
                   */
                   class Table {
                  
                      /**
                       * @Column(type="integer")
                       * @Id
                       * @GeneratedValue(strategy="IDENTITY")
                       */
                       private $id;
                  
                  
                      /**
                       * @ManyToOne(targetEntity="EntitiesUsers")
                       * @joinColumn(name="userId", referencedColumnName="id")
                       */
                       private $User;
                  
                  
                      /**
                       * @Column(type="string")
                       */
                       private $text;
                  
                  
                  }
                  

                  如果我这样做$q->getQuery()->getSingleResult()->getUser()->getUserId()

                  doctrine 生成查询,如:

                  doctrine generate query like:

                  SELECT * FROM table t INNER JOIN users u ON u.id = t.userId WHERE id = 100
                  

                  但如果我不需要表用户,如何获取用户 ID.

                  but if i don`t need table users, how to get an userId.

                  在纯 SQL 中,我可以

                  In pure SQL i can just

                  SELECT * FROM table WHERE id = 100
                  

                  并在不加入用户表的情况下获取 userId.

                  and get userId without join users table.

                  推荐答案

                  您可能还想查看 IDENTITY() 函数(Doctrine version >2.2).

                  You may also want to look at the IDENTITY() function (Doctrine version >2.2).

                  示例:

                  SELECT IDENTITY(t.User) AS user_id from Table
                  

                  应该返回:

                  [ ['user_id' => 1], ['user_id' => 2], ... ]
                  

                  另见:http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html#dql-functions

                  这篇关于如何在不加入doctrine2的情况下获得id?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跟版网!

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