REFACTOR: 🔨 Add return types and new relations for User and `Custom…

…er` (#8)

* REFACTOR: 🔨 return types and new relations for User and Customer models

* CHORE: ⭐ sorting relations alphabetically

app/Models/Customer.php

@@ -4,15 +4,23 @@
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
 
 class Customer extends Model
 {
     use HasFactory, SoftDeletes;
 
-    public function users()
+
+    public function invoices(): HasMany
+    {
+        return $this->hasMany(Invoice::class);
+    }
+
+    public function users(): HasMany
     {
         return $this->hasMany(User::class);
     }
+
 }

app/Models/User.php

@@ -4,6 +4,7 @@
 
 // use Illuminate\Contracts\Auth\MustVerifyEmail;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Laravel\Sanctum\HasApiTokens;
@@ -44,7 +45,7 @@ class User extends Authenticatable
         'password' => 'hashed',
     ];
 
-    public function customer()
+    public function customer(): BelongsTo
     {
         return $this->belongsTo(Customer::class);
     }

database/migrations/2014_10_12_000000_create_users_table.php

@@ -12,6 +12,7 @@ public function up(): void
     {
         Schema::create('users', function (Blueprint $table) {
             $table->id();
+            $table->foreignId('customer_id')->nullable();
             $table->string('name');
             $table->string('email')->unique();
             $table->timestamp('email_verified_at')->nullable();