php artisan migrate constraint code example

Example 1: laravel foreign key

Schema::table('posts', function (Blueprint $table) {
    $table->unsignedBigInteger('user_id');

    $table->foreign('user_id')->references('id')->on('users');
});
OR
Schema::table('posts', function (Blueprint $table) {
    $table->foreignId('user_id')->constrained();
});

Example 2: change existing migration laravel

php artisan make:migration update_description_in_products_table

Example 3: laravel before migration

Schema::table('users', function ($table) {
    $table->string('email')->after('id')->nullable();
});

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Php Example

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