laravel relations find

1$comment = Post::find(1)->comments()
2                    ->where('title', 'foo')
3                    ->first();

1return $this->hasMany(Comment::class, 'foreign_key');
2
3return $this->hasMany(Comment::class, 'foreign_key', 'local_key');

1/**
2 * Get the user's most recent order.
3 */
4public function latestOrder()
5{
6    return $this->hasOne(Order::class)->latestOfMany();
7}

1class Project extends Model
2{
3    public function deployments()
4    {
5        return $this->hasManyThrough(
6            Deployment::class,
7            Environment::class,
8            'project_id', // Foreign key on the environments table...
9            'environment_id', // Foreign key on the deployments table...
10            'id', // Local key on the projects table...
11            'id' // Local key on the environments table...
12        );
13    }
14}

1/**
2 * Get the current pricing for the product.
3 */
4public function currentPricing()
5{
6    return $this->hasOne(Price::class)->ofMany([
7        'published_at' => 'max',
8        'id' => 'max',
9    ], function ($query) {
10        $query->where('published_at', '<', now());
11    });
12}

1return $this->belongsToMany(Role::class, 'role_user');

1<?php
2
3namespace App\Models;
4
5use Illuminate\Database\Eloquent\Model;
6
7class Comment extends Model
8{
9    /**
10     * Get the post that owns the comment.
11     */
12    public function post()
13    {
14        return $this->belongsTo(Post::class);
15    }
16}

1/**
2 * Get the user's oldest order.
3 */
4public function oldestOrder()
5{
6    return $this->hasOne(Order::class)->oldestOfMany();
7}

1use App\Models\User;
2
3$user = User::find(1);
4
5foreach ($user->roles as $role) {
6    //
7}

1<?php
2
3namespace App\Models;
4
5use Illuminate\Database\Eloquent\Model;
6
7class Mechanic extends Model
8{
9    /**
10     * Get the car's owner.
11     */
12    public function carOwner()
13    {
14        return $this->hasOneThrough(Owner::class, Car::class);
15    }
16}