How to do join in different names in Laravel? - php

Question

I have two tables named users and buys:
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('first_name');
$table->string('last_name');
$table->string('referral_code')->nullable();
$table->integer('parent_id')->unsigned()->nullable();
$table->string('mobile')->unique();
$table->string('email')->unique();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
}
public function up()
{
Schema::create('buys', function (Blueprint $table) {
$table->bigIncrements('id');
$table->bigInteger('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
$table->bigInteger('product_id')->unsigned();
$table->foreign('product_id')->references('id')->on('products')->onDelete('cascade');
$table->timestamps();
});
}
I want to do a join on users.parent_id and buys.user_id. Here is my current query:
public function user ()
{
return $this->hasOne(User::class);
}
My query:
$users = Buy::all()->where('parent_id', auth()->user()->id)->latest()->paginate(25);
But my query throws this:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'parent_id' in 'where clause' (SQL: select count(*) as aggregate from buys where parent_id = 2)
Any idea how can I fix it?

Answer 1

When making the relationship, Laravel expects that the foreign key name will be the method name + _id in your case user_id which is okay for the local key, but the foreign key is not the id on the user table, so you need to tell Laravel that. So try this instead:
public function user ()
{
return $this->hasOne(User::class, 'parent_id', 'user_id');
}
-- EDIT after seeing your query
You are trying to use a column that does not exist on your buys model.
$users = Buy::with('user')->where('user_id', auth()->user()->id)->latest()->paginate(25);

Answer 2

It should be like
$users = Buy::where('user_id', auth()->user()->parent_id)->latest()->paginate(25);