Eloquent One To Many Relationships Tutorial in Laravel 11
<?php
namespace App\Http\Controllers;
use App\Models\Post;
use App\Models\User;
use Illuminate\Http\Request;
class UserController extends Controller
{
/**
* Display a listing of the resource.
*/
public function index()
{
// $users = User::get();
// return $users;
// $users = User::with("post")->get();
// return $users;
// $users = User::with("post")->find(2); //First Way
// $users = User::find(2); //Second Way
// $posts = $users->post;
// return $users;
// Those users who have not any post as shown below :
// $users = User::doesntHave("post")->get();
// return $users;
// Those users names only who have post as shown below :
// $users = User::has("post")->get();
// return $users;
// Those users names with post who have post as shown below :
// $users = User::has("post")->with("post")->get();
// return $users;
// Those users names with post who have 3 or more than 3 post as shown below :
// $users = User::has("post",">=",3)->with("post")->get();
// return $users;
// users names with number of post with "withCount()" method as shown below :
// $users = User::withCount("post")->get();
// return $users;
// users details with some specific columns as shown below :
$users = User::select(["name", "email"])->withCount("post")->get();
return $users;
}
/**
* Show the form for creating a new resource.
*/
public function create()
{
// Method 1 : Insert data in "posts" table as shown below :
// $post = new Post([
// "title" => "News Title - Test",
// "description" => "Just Testing...."
// ]);
// $user = User::find(2);
// $user->post()->save($post);
// Insert data Method 2 :
// $user = User::find(2);
// $user->post()->create([
// "title" => "News Title 2 - Test",
// "description" => "Just Testing 2 ...."
// ]);
// Insert Multiple data in database Method 3 :
$user = User::find(4);
$user->post()->createMany([
[
"title" => "News Title 3 - Test",
"description" => "Just Testing 3 ...."
],
[
"title" => "News Title 4 - Test",
"description" => "Just Testing 4 ...."
]
]);
}
/**
* Store a newly created resource in storage.
*/
public function store(Request $request)
{
//
}
/**
* Display the specified resource.
*/
public function show(string $id)
{
//
}
/**
* Show the form for editing the specified resource.
*/
public function edit(string $id)
{
//
}
/**
* Update the specified resource in storage.
*/
public function update(Request $request, string $id)
{
//
}
/**
* Remove the specified resource from storage.
*/
public function destroy(string $id)
{
//
}
}
Above File is app\Http\Controllers\UserController FileBelow File is app\Http\Controllers\PostController File
<?php
namespace App\Http\Controllers;
use App\Models\Post;
use App\Models\User;
use Illuminate\Http\Request;
class PostController extends Controller
{
/**
* Display a listing of the resource.
*/
public function index()
{
// $posts = Post::get();
// return $posts;
// $posts = Post::with("user")->get();
// return $posts;
// To find particuar user information we can use find() method as shown below :
// $posts = Post::with("user")->find(2);
// return $posts;
// echo $posts->title . "<br>";
// echo $posts->description . "<br>";
// echo $posts->user->name;
// All "posts" table data will show in table as shown below :
// $posts = Post::with("user")->get();
// foreach($posts as $data) {
// echo "<div style='border:1px solid red;margin:0 0 10px'>
// <h3>$data->title</h3>
// <span>{$data->user->name}</span>
// <p>$data->description</p>
// </div>";
// }
// $posts = Post::with("user")->where("title","News Title Two")->get();
// return $posts;
// When we want to search in another table at that time we have to use withWhereHas() method
// $posts = Post::withWhereHas("user",function($query){
// $query->where("name","Salman Khan");
// })->get();
// return $posts;
// If we want to seach for multiple user in another table as shown below :
// $posts = Post::withWhereHas("user",function($query){
// $query->where("name","Salman Khan")->orWhere("name","Deepika Padukone");
// })->get();
// return $posts;
$users = User::where("name", "Salman Khan")->get();
$posts = Post::whereBelongsTo($users)->get();
return $posts;
}
/**
* Show the form for creating a new resource.
*/
public function create()
{
//
}
/**
* Store a newly created resource in storage.
*/
public function store(Request $request)
{
//
}
/**
* Display the specified resource.
*/
public function show(string $id)
{
//
}
/**
* Show the form for editing the specified resource.
*/
public function edit(string $id)
{
//
}
/**
* Update the specified resource in storage.
*/
public function update(Request $request, string $id)
{
//
}
/**
* Remove the specified resource from storage.
*/
public function destroy(string $id)
{
//
}
}
Below File is app\Models\User File
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
public $timestamps = false;
// protected $guarded = []; //First way
protected $fillable = ["name", "email"]; //Second way
public function post()
{
return $this->hasMany(Post::class);
}
}
Below File is app\Models\Post File
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
// protected $guarded = []; //First way
protected $fillable = ["title", "description", "user_id"]; //Second way both are same
public function user()
{
return $this->belongsTo(User::class);
}
}
Below File is database\json\users File
[
{
"name": "Yahoo Baba",
"email": "yahoobaba@gmail.com"
},
{
"name": "Salman Khan",
"email": "salman@gmail.com"
},
{
"name": "Deepika Padukone",
"email": "deepika@gmail.com"
},
{
"name": "Abhishek Bachchan",
"email": "abhishek@gmail.com"
}
]
Below File is database\json\posts File
[
{
"title": "News Title One",
"description": "Lorem ipsum dolor sit amet, consectetur adipiscing elit",
"user_id": 1
},
{
"title": "News Title Two",
"description": "sed do eiusmod tempor incididunt ut labore et dolore magna aliqua",
"user_id": 2
},
{
"title": "News Title Three",
"description": "Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip",
"user_id": 1
},
{
"title": "News Title Four",
"description": "ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur",
"user_id": 1
},
{
"title": "News Title Five",
"description": "Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum",
"user_id": 3
},
{
"title": "News Title Six",
"description": "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium",
"user_id": 3
},
{
"title": "News Title Seven",
"description": "totam rem aperiam, eaque quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo",
"user_id": 1
},
{
"title": "News Title Eight",
"description": "Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui",
"user_id": 3
},
{
"title": "News Title Nine",
"description": "ratione voluptatem sequi nesciunt.Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit",
"user_id": 2
}
]
Below File is database\migrations\2024_12_10_072517_create_users_table File
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
return new class extends Migration
{
/**
* Run the migrations.
*/
public function up(): void
{
Schema::create('users', function (Blueprint $table) {
$table->id();
$table->string("name");
$table->string("email", 50)->unique();
});
}
/**
* Reverse the migrations.
*/
public function down(): void
{
Schema::dropIfExists('users');
}
};
Below File is database\migrations\2024_12_10_072614_create_posts_table File
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
return new class extends Migration
{
/**
* Run the migrations.
*/
public function up(): void
{
Schema::create('posts', function (Blueprint $table) {
$table->id();
$table->string("title", 50);
$table->longText("description");
$table->foreignId("user_id")->constrained("users")->onUpdate("cascade")->onDelete("cascade");
$table->timestamps();
});
}
/**
* Reverse the migrations.
*/
public function down(): void
{
Schema::dropIfExists('posts');
}
};
Below File is database\seeders\UserSeeder File
<?php
namespace Database\Seeders;
use App\Models\User;
use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\File;
class UserSeeder extends Seeder
{
/**
* Run the database seeds.
*/
public function run(): void
{
$json = File::get(path: "database/json/users.json");
$users = collect(json_decode($json));
$users->each(function ($user) {
User::create([
"name" => $user->name,
"email" => $user->email
]);
});
}
}
Below File is database\seeders\PostSeeder File
<?php
namespace Database\Seeders;
use App\Models\Post;
use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\File;
class PostSeeder extends Seeder
{
/**
* Run the database seeds.
*/
public function run(): void
{
$json = File::get(path: "database/json/posts.json");
$posts = collect(json_decode($json));
$posts->each(function ($post) {
Post::create([
"title" => $post->title,
"description" => $post->description,
"user_id" => $post->user_id
]);
});
}
}
Below File is database\seeders\DatabaseSeeder File
<?php
namespace Database\Seeders;
use App\Models\User;
// use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;
class DatabaseSeeder extends Seeder
{
/**
* Seed the application's database.
*/
public function run(): void
{
// User::factory(10)->create();
// User::factory()->create([
// 'name' => 'Test User',
// 'email' => 'test@example.com',
// ]);
$this->call([
UserSeeder::class,
PostSeeder::class
]);
}
}
Below File is routes\web File
<?php
use App\Http\Controllers\PostController;
use App\Http\Controllers\UserController;
use Illuminate\Support\Facades\Route;
Route::get('/', function () {
return view('welcome');
});
Route::resource("user", UserController::class);
Route::resource("post", PostController::class);
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