Question

您好我试图创建显示所有类别的脚本，如果类别属于post，则应使用复选框选中此类别。我的剧本不会有用，请你帮我。当必须显示两个时，它只显示一个选中的类别。 Controller类别模型：

class Category extends Eloquent {

    protected $table= "categories";

    public function posts(){
        return $this->belongsToMany('Post');
    }

}

发布模型

class Post extends Eloquent {

    protected $table = 'posts';

    public function categories(){
        return $this->belongsToMany('Category');
    }

}

catRelation：

[{"id":"45","post_id":"132","category_id":"1","created_at":"2014-12-26 20:32:41","updated_at":"2014-12-26 20:32:41"},{"id":"46","post_id":"132","category_id":"3","created_at":"2014-12-26 20:32:41","updated_at":"2014-12-26 20:32:41"}]

所有类别：[{"id":"1","name":"Laravel","slug":"laravel","created_at":"-0001-11-30 00:00:00","updated_at":"-0001-11-30 00:00:00"},{"id":"3","name":"PHP","slug":"php","created_at":"-0001-11-30 00:00:00","updated_at":"-0001-11-30 00:00:00"}]

Answer 1

一个类别不应该属于一个帖子，而是一个帖子应该属于一个类别。

我认为catRelation是您的数据透视表。对于此，您不需要id，created_at或updated_at。

示例模型：

class Post extends Eloquent 
{
    protected $table = 'posts';

    public function category()
    {
        return $this->belongsToMany('Category', 'catRelation', 'category_id');
    }
}

class Category extends Eloquent
{
    protected $table = 'categories';

    public function post()
    {
        return $this->belongsToMany('Post', 'catRelation', 'post_id');
    }
}

注意：我可能错误地在belongsToMany中获得了最终论据。

检查类别是否属于post

1 个答案: