Migration Primary and Foreign key in Laravel 11

November 11, 2024

<?php

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('students', function (Blueprint $table) {
            $table->id();
            $table->string("name",30);
            $table->string("email",40)->nullable()->unique();
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('students');
    }
};
Above File is database/migrations/create_students_table.php File

Below File is database/migrations/create_libraries_table.php File

<?php

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('libraries', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger("stu_id");
            $table->foreign("stu_id")->references("id")->on("students")->onUpdate("cascade")->onDelete("cascade");
            $table->string("book");
            $table->date("due_date")->nullable();
            $table->boolean("status");
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('libraries');
    }
};






Below File is database/migrations/update_library_table.php File
<?php

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::table('libraries', function (Blueprint $table) {
            $table->dropForeign("libraries_stu_id_foreign");
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::table('libraries', function (Blueprint $table) {
            //
        });
    }
};