How to convert the raw sql command on Laravel ORM Eloquent - php

Question

I have 4 tables, 1->user, 2->category, 3->comment, 4->post
I want to get the category for the related post that user already commented
SELECT kategoris.* FROM kategoris
INNER JOIN yazis on yazis.kategori_id = kategoris.id
INNER JOIN yorums on yorums.yazi_id = yazis.id
INNER JOIN users on users.id = yorums.user_id
where users.id = 1
Relations

Answer 1

Depending on how your models are setup, this is how the query should be with Eloquent
$category = Post::whereHas('comments', function($query) {
$query->where('user_id', auth()->user()->id);
})->first()->category;
Update:
This is how your models and table migrations should look
User has many posts and comments
public function posts()
{
return $this->hasMany(Post::class);
}
public function comments()
{
return $this->hasMany(Comment::class);
}
Category has many posts
public function posts()
{
return $this->hasMany(Post::class);
}
Post belongs to a category and a user, has many comments
public function category()
{
return $this->belongsTo(Category::class);
}
public function comments()
{
return $this->hasMany(Comment::class);
}
public function user()
{
return $this->belongsTo(User::class);
}
Posts Table Migration
Schema::create('posts', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('user_id');
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
$table->unsignedBigInteger('category_id');
$table->foreign('category_id')->references('id')->on('categories')->onDelete('cascade');
$table->timestamps();
});
Comment belongs to a post and a user
public function post()
{
return $this->belongsTo(Post::class);
}
public function user()
{
return $this->belongsTo(User::class);
}
Comments Table Migration
Schema::create('comments', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('user_id');
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
$table->unsignedBigInteger('post_id');
$table->foreign('post_id')->references('id')->on('posts')->onDelete('cascade');
$table->timestamps();
});
Let's populate some data like this...
Database Seeder
$user = factory(User::class)->create([]);
$category = Category::create([]);
$post = $user->posts()->create(['category_id' => $category->id]);
$post->comments()->create(['user_id' => $user->id]);
And get the category of the post that the authenticated user commented on with the query above...
Hope this helps :)