请查看有关关联映射的官方文档此处。

Take a look at the official documentation about association mapping here.

尝试这样：

在BlogLinkTag中

In BlogLinkTag

    /**
     * @var integer
     * @ORM\ManyToOne(targetEntity="Blog", inversedBy="tags") //put the name of the variable in the other entity here
     * @ORM\JoinColumn(name="blog_id", referencedColumnName="id") //reference of the column targetted here
     */
    private $blog;

在博客中：

    /**
     * @ORM\OneToMany(targetEntity="BlogLinkTag", mappedBy="blog") //put the name of the variable in the other entity here
     */
    protected $tags;