Posted By
Bajarangi soft ,
Posted On 08-09-2020
One To Many Eloquent Relationship
Lets start.
How to define One To Many Eloquent Relationship
1.Create laravel project and connect to database in .env file.
composer create-project --prefer-dist laravel/laravel Company
2.Create Model and Migrate it.
To implement the one to Many relationship in Laravel, we need two models: Employee and Transactions
Now we create Employee and Transactions models in fresh project so run below commands in comand prompt.
php artisan make:model Employee -m
php artisan make:model Transaction -m
3.After Created Implement code in Model and migration files as below
Employee.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Employee extends Model
{
protected $table = 'Employees';
protected $fillable = [
'employee_name', 'salary',
];
}
Transactions.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Transaction extends Model
{
protected $table = 'Transactions';
protected $fillable = [
'employee_id', 'transaction_amount',
];
}
2020_09_04_115547_create_employees_table.php
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateEmployeesTable extends Migration
{
public function up()
{
Schema::create('employees', function (Blueprint $table) {
$table->increments('id');
$table->string('employee_name');
$table->integer('salary');
$table->timestamps();
});
}
public function down()
{
Schema::dropIfExists('employees');
}
}
2020_09_04_115902_create_transactions_table.php
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateTransactionsTable extends Migration
{
public function up()
{
Schema::create('transactions', function (Blueprint $table) {
$table->increments('id');
$table->integer('employee_id');
$table->integer('transaction_amount');
$table->timestamps();
});
}
public function down()
{
Schema::dropIfExists('transactions');
}
}
3.After creating new model now we need create Company controller.
php artisan make:controller CompanyController
4.Creating a One To Many Relationship in Employee and Transactions Models
Defining One To Many Relationship in Employee.php
public function transactions()
{
return $this->hasMany('App\Transaction');
}
Defining Inverse One To Many Relationship in Transactions.php
public function employee()
{
return $this->belongsTo('App\Employee');
}
5.Creating a One To Many Relationship Impement code in company controller to access one to many relationship.
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Employee;
use App\Transaction;
class CompanyController extends Controller
{
public function index()
{
// $data=Transaction::find(1)->employee->amount; //to get single data from Transaction model
// $data=Employee::find(1)->transactions;//to get single data from Employee model
$data = Employee::with('transactions')->get(); // For multiple data
return $data;
}
}
Create Route in web.php
Route::get('employee/onetomany', 'CompanyController@onetomay')->name('employee.onetomany');
6.Filtering a One To Many Relationship Impement code in company controller to filter one to many relationship.
$Employee = Employee::find(1);
$data = $Employee->transactions()
->where('transaction_amount', '>', '500')
->orderBy('name', 'asc')
->get();
return $data
7.Deleteing a One To Many Relationship Impement code in company controller to delete one to many relationship.
$Employee = Employee::find(1);
$Employee->transactions()->delete();