Laravel one to one eloquent relationship tutorial example – onlinecode
In this post we will give you information about Laravel one to one eloquent relationship tutorial example – onlinecode. Hear we will give you detail about Laravel one to one eloquent relationship tutorial example – onlinecodeAnd how to use it also give you demo for it if it is necessary.
In this tutorial, today we discuss laravel one to one Eloquent relationship. Eloquent ORM means Object-relational Mapping and laravel provides a beautiful ActiveRecord structure. so we can easy to interact with the application database. let’s start about one to one eloquent relationship.
Laravel one to one relationship is based on the relation between two tables. so we need one table of the primary key and another table of reference key. For example, we have two tables: Students and Standards. both tables are connected as a one to one relationship with each other using the primary key and reference key.
Setting Database Configuration
After complete installation of laravel. we have to database configuration. now we will open the .env file and change the database name, username, password in the .env file. See below changes in a .env file.
DB_CONNECTION=mysql DB_HOST=127.0.0.1 DB_PORT=3306 DB_DATABASE=Enter_Your_Database_Name(one_to_one_relation) DB_USERNAME=Enter_Your_Database_Username(root) DB_PASSWORD=Enter_Your_Database_Password(root)
Create Table using migration
Now, We need to create a migration. so we will below command using create the students and standards table migration.
php artisan make:migration create_students_table --create=students php artisan make:migration create_standars_table --create=standards
After complete migration. we need below changes in the database/migrations/create_students_table and database/migrations/create_standars_table file.
create_students_table.php
<?php
use IlluminateSupportFacadesSchema;
use IlluminateDatabaseSchemaBlueprint;
use IlluminateDatabaseMigrationsMigration;
class CreateStudentsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('students', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('first_name');
$table->string('last_name');
$table->text('address');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('students');
}
}
?>create_standars_table.php
<?php
use IlluminateSupportFacadesSchema;
use IlluminateDatabaseSchemaBlueprint;
use IlluminateDatabaseMigrationsMigration;
class CreateStandardsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('standards', function (Blueprint $table) {
$table->bigIncrements('id');
$table->integer('student_id')->unsigned();
$table->string('standard_name');
$table->timestamps();
$table->foreign('student_id')->references('id')->on('students')->onDelete('cascade');
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('standards');
}
}
?>Run the below command. after the changes above file.
php artisan migrate
Create Model
Here below command help through we will create the Student and Standard model. we will also use “hasOne()” for a student model and “belongsTo()” for a standard model.
php artisan make:model Student php artisan make:model Standard
Student.php
<?php
namespace App;
use IlluminateDatabaseEloquentModel;
class Student extends Model
{
protected $fillable = [
'first_name','last_name', 'address'
];
/**
* Get the standard record associated with the student.
*/
public function standard()
{
return $this->hasOne('AppStandard');
}
}
?>Standard.php
<?php
namespace App;
use IlluminateDatabaseEloquentModel;
class Standard extends Model
{
/**
* Get the student that owns the standard.
*/
public function student()
{
return $this->belongsTo('AppStudent');
}
}
?>Route and Controller
We have to need put below student resource route in routes/web.
<?php
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('/', function () {
return view('welcome');
});
Route::get('student','studentsController@index');
?>Here below command help to create the student controller.
php artisan make:controller StudentsController
StudentController.php
<?php
namespace AppHttpControllers;
use AppStudent;
use AppStandard;
use IlluminateHttpRequest;
class StudentController extends Controller
{
/**
* Display a listing of the resource.
*
* @return IlluminateHttpResponse
*/
public function index()
{
//
$student1 = Student::find(1)->standard;
dd($student1);
}
}
?>Hope this code and post will helped you for implement Laravel one to one eloquent relationship tutorial example – onlinecode. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs