Symfony 5，Doctrine queryBuilder OneToMany 关系

Posted 2023-04-14

【中文标题】Symfony 5，Doctrine queryBuilder OneToMany 关系

【英文标题】：Symfony 5, Doctrine queryBuilder OneToMany Relationship

【发布时间】：2021-04-16 06:32:22

【问题描述】：

我需要有关 Symfony 5 Doctrine queryBuilder 的帮助。我需要找到一些 OneToMany 关系只有来自选定文件组的文件的项目。

Entity structure:
    Documents.php:
       Id
       Name: (string)
       FILES: (OneToMany DocumentsFiles.php)
    DocumentsFiles.php: 
            Id
            File: (OneToOne)
            FileGroup: (ManyToOne DocumentsFilesGroup.php)
            Documents: (ManyToOne Documents.php)
    DocumentsFilesGroup.php:
            Id
            Name: (string)
            ShortName: (string)
            Files: (OneToMany DocumentsFiles.php)

Database:
    Document
        ID, NAME, FILES (OneToMany)
        1, SomeName, [1, File, 1,2, File1, 1,3, File2, 1,4, File3, 2],
        2, SomeName1, [5, File4, 1,6, File5, 1]
        3, SomeName2, [12, File11, 2]
        4, SomeName3, [13, File12, 1]
        5, SomeName4, [16, File15, 2]
    DocumentsFileGroups
        Id, Name, ShortName
        1, Temporary, tmp
        2, Final, final
For example:
    I need document with temporary files only.
    Result:  
        2, SomeName1, [5, File4, 1,6, File5, 1]
        4, SomeName3, [13, File12, 1]

In DocumentRepository i have query:
$query->addSelect('nodeFiles')->leftJoin('node.files', 'nodeFiles')->leftJoin(\App\Entity\DocumentsFiles::class, 'nodeExt', Expr\Join::WITH, 'nodeExt.fileGroup IN (:documentsFileGroup) AND nodeExt.fileGroup NOT IN (:documentsNotFileGroup)')
                                        ->setParameter('documentsFileGroup', 1)
                                        ->setParameter('documentsNotFileGroup', 2);
But in results i have:
  (wrong) 1, SomeName, [1, File, 1,2, File1, 1,3, File2, 1,4, File3, 2],
  2, SomeName1, [5, File4, 1,6, File5, 1]
  4, SomeName3, [13, File12, 1]

有人有想法或线索吗？ 感谢您的帮助。

【参考方案1】：

使用innerJoin 而不是leftJoin DocumentsFiles 或者更好地将过滤条件放入where()，因为您不需要加入DocumentFiles 两次。它可能看起来像这样：

$query->addSelect('nodeFiles')
    ->innerJoin('node.files', 'nodeFiles')
    ->where($query->expr()->eq('nodeFiles.fileGroup', ':documentsFileGroup'))
    ->andWhere($query->expr()->neq('nodeExt.fileGroup', ':documentsNotFileGroup'))
    ->setParameter('documentsFileGroup', 1)
    ->setParameter('documentsNotFileGroup', 2);