如何获取所有评论的帖子标题链接到 Laravel 中的帖子表？

Question

Comments Table

+----+---------+------+------+--------+-----------+
| id | post_id | name | text | status | timestamp |
+----+---------+------+------+--------+-----------+
|  1 |      52 | user | test |      1 | timestamp |
+----+---------+------+------+--------+-----------+

Posts

+----+--------+------------------+-----------+
| id | title  |   description    | timestamp |
+----+--------+------------------+-----------+
| 52 | mypost | post description | timestamp |
+----+--------+------------------+-----------+

Commnet.php [laravel Model]

public function post()
{
    return $this->belongsTo('App\Post');
}

Post.php [laravel Model]

public function comments()
{
    return $this->hasMany('App\Comment');
}

I want to List all Comments with Post title. How can I collect Post title included in comments collection?

I do not want to use DB::table(); I want it to be collected through comment Model. like this $comments = Comment::all()->post->title;

Answer 1

Example 1

Usually a query looks like this( laravel docs ):

$comments = Comment::with('post')->all();  

Using the data like this looks like so:

foreach($comments as $comment) {
    $comment->name;
    $comment->text;
    $comment->post->title;
}

Example 2

If you want the output to be 'flat' you can also do something like this( laravel docs ):

$comments = Comment::select('comments.*', 'posts.title')->join('posts', 'post.id', 'comments.post_id')->get()

This way you can use the data like this:

foreach($comments as $comment) {
    $comment->name;
    $comment->text;
    $comment->title;
}

Example 3

After seeing your comment under your answer later, I realized the query you could be looking for:

$postTitles = Post::select('title')->whereHas('comments')->get()->pluck('title');

This will return a collection of post titles, only the post titles which have comments will be shown.

Example 4

Based on your latest comments I can show you how to filter on comments in post( laravel docs ):

 $post = Post
        ::with([
            'category',
            'comments' => function($query) {
                $query->where('status_id', 1);
            },
            'user'
        ])
        -where('slug', $slug)
        ->first();

Now you get the first post related to the slug and with it all user details, all category details, but only the comments which have status_id 1