Primer commit proyecto Laravel

app/Models/Turno.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Plantel;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Turno extends Model
+{
+    protected $guarded = [];
+
+    public function turnoPlantel() : BelongsToMany
+    {
+        return $this->belongsToMany(Plantel::class)->withPivot('plantel_id');
+    }
+
+    public function existe($plantelId = null)
+    {
+        if (!$plantelId) {
+            return false;
+        }
+
+        return $this->turnoPlantel()
+            ->wherePivot('plantel_id', $plantelId)
+            ->exists();
+    }
+}