Laravel Eloquent ORM in Bangla Part-enerating Model Classes)
Jan 05, 2025 pm 05:32 PM
Eloquent: Generating Model Classes is a process for generating model classes for interacting with database tables in Laravel. Using Eloquent ORM (Object-Relational Mapper) you can easily read, create, update and delete data from database tables.
How to create Model Class
1. Creating Model using Artisan command
The model class is created using Laravel's artisan CLI. Run the following command:
php artisan make:model ModelName
For example, to create a model named Post:
php artisan make:model Post
This will create a Post.php file in the app/Models directory.
The basic structure of the model
The model should generally look like this:
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
use HasFactory;
}
2. Creating model with migration file
Use the following command to create the model and database migration together:
php artisan make:model Post -m
This will create two things:
- Post model.
- A migration file named database/migrations/2025_01_05_000000_create_posts_table.php.
3. Creating Factory and Seeder with Model
To build models with Factory and Seeder files:
php artisan make:model ModelName
- m: will generate migration.
- f: will create the factory.
- s: will generate cedar.
- c: will create the controller.
relation to database table in model
1. Default table name
Laravel assumes the database table name according to the model class name.
For example:
- The default table for the Post model will be posts.
- The default table for the User model will be users.
If you want to use custom tables, set the $table property on the model:
php artisan make:model Post
Important properties and methods of model
1. $fillable and $guarded
$fillable or $guarded is used to determine which fields in the database can insert data.
- $fillable: Data can be inserted into specified fields.
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
use HasFactory;
}
- $guarded: Data cannot be inserted into specified fields.
php artisan make:model Post -m
2. $primaryKey
If the primary key of your table is something other than id:
php artisan make:model Post -mfsc
3. $timestamps
Laravel uses table created_at and updated_at columns by default. If you don't want to use them:
class Post extends Model
{
protected $table = 'blog_posts';
}
4. Relationships (Relationships)
Models can be linked to each other using Eloquent relationships.
- One-to-One Relationship:
php artisan make:model ModelName
- One-to-Many relationship:
php artisan make:model Post
- Many-to-Many relationship:
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
use HasFactory;
}
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