Learning Eloquent with Laravel 8

Eloquent is an ORM(object relational model) used to interact with database by providing a model for each database table.

Creating model:

php artisan make:model owner -mc
php artisan make:model house -mc

Here M is for model and c is for controller. Let’s check our owner model class at apps/model

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class owner extends Model
{
    use HasFactory;
}

So where is our table name? By default owner model is expecting the table name  “owners” .But we can use any table here

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class owner extends Model
{
    use HasFactory;
    protected $table='owners';        
}

Primary Key:

The default primary key for each table is “id” for eloquent but we can change it.

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class owner extends Model
{
    use HasFactory;
    protected $table='owners';
    protected $primaryKey='owner_id';
}

if wish not to increment the primary key value we have to set

class owner extends Model
{
    use HasFactory;
    public $incrementing=false;

}

Also if our primary is not an integer

class owner extends Model
{
    use HasFactory;
    public $keyType='string';

}

Note: Composite primary key is not supported in eloquent.   

Lets get all result from controller using a model in elequent

class TestEqlController extends Model
{
    use HasFactory;

    public function index()
    {
        $house=house::all();

        foreach ($house as $hou)
        {
            echo $hou->house_name;
        }
    }
}

Building Query: eloquent models are query builder as well

$house=house::where('id',1)
    ->orderBy('id')
    ->take(1)
    ->get();
dd($house);