исправление ошибок

database/migrations/2020_12_08_082614_create_academic_plans_table.php

@@ -0,0 +1,43 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateAcademicPlansTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('academic_plans', function (Blueprint $table) {
+            $table->unsignedInteger('subject_id');
+            $table->unsignedInteger('class_id');
+            $table->unsignedInteger('hours_per_week');
+            $table->unsignedInteger('hours_per_year');
+            $table->timestamps();
+
+            $table->foreign('subject_id')
+                ->references('id')->on('subjects')
+                ->onDelete('cascade');
+            $table->foreign('class_id')
+                ->references('id')->on('school_classes')
+                ->onDelete('cascade');
+
+            $table->primary(['subject_id', 'class_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('academic_plans');
+    }
+}