Laravel 5.1 HasMany关系问题

Question

I have 3 tables posts, comments and likes. One post can have multiple comments and one comments can have multiple likes. How can I define relationship between 3 tables to fetch all posts details, including comments and likes of particular post_id in laravel 5.1?

Tables in DB

1. posts

   • post_id
   • post_detail

2. comments

   • comment_id
   • post_id
   • comment

3. likes

   • like_id
   • comment_id

Answer 1

I think this can be done is several ways. I have implemented in following way keeping two pivot table for 1. post-comment 2. comment-like. However this way may not be the best way, but it works. My tables looks like...

1) comment table.

class PostCommentsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('post_comments', function (Blueprint $table) {
            $table->increments('id');
            $table->unsignedInteger('post_id');

            $table->string('comment_owner_username');
            $table->string('comment');
            $table->timestamps();
        });
    }

2) like table.

class CommentLikesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('comment_likes', function (Blueprint $table) {
            $table->unsignedInteger('post_comment_id');
            $table->unsignedInteger('user_id');
            $table->timestamps();

            $table->primary(array("post_comment_id", "user_id"));
        });
    }

NOTE you need to add the Model class and all other codes required to make this work porperly. This is only the database migration part.