first commit

app/Models/AdmissionCampaign.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class AdmissionCampaign extends Model
+{
+    use HasFactory;
+
+    protected $guarded = false;
+
+    protected $casts = [
+      'info' => 'array'
+    ];
+
+    public function degrees()
+    {
+        return $this->hasMany(CampaignDegree::class);
+    }
+    public function admission_plans()
+    {
+        return $this->hasMany(AdmissionPlan::class, 'admission_campaigns_id', 'id');
+    }
+
+    public function educationalPrograms()
+    {
+        return $this->hasManyThrough(
+            EducationalProgram::class,
+            AdmissionPlan::class,
+            'admission_campaigns_id', // внешний ключ в AdmissionPlan
+            'id',                     // внешний ключ в EducationalPrograms
+            'id',                     // локальный ключ в AdmissionCampaign
+            'educational_programs_id' // локальный ключ в AdmissionPlan
+        );
+    }
+}