Seat model and migration

app/Models/Seat.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Seat extends Model
+{
+    use HasFactory;
+}

database/migrations/2024_06_22_210509_create_seats_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use App\Models\Audition;
+use App\Models\Ensemble;
+use App\Models\Entry;
+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('seats', function (Blueprint $table) {
+            $table->id();
+            $table->foreignIdFor(Ensemble::class)->constrained()->restrictOnDelete()->cascadeOnUpdate();
+            $table->foreignIdFor(Audition::class)->constrained()->restrictOnDelete()->cascadeOnUpdate();
+            $table->integer('seat');
+            $table->foreignIdFor(Entry::class)->constrained()->restrictOnDelete()->cascadeOnUpdate();
+            $table->unique(['ensemble_id', 'audition_id', 'seat']);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('seats');
+    }
+};