php - 拉维尔 5 : php artisan migrate:refresh

Question

我正在做一个 laravel 项目，每次我更改我的表(添加或删除列)并运行 php artisan migrate:refresh。我收到此错误:

[Symfony\Component\Debug\Exception\FatalErrorException] Can't use method return value in write context

尝试的解决方案:

1. 运行 composer dump-autoload(失败)
2. 在数据库中删除表，删除迁移文件并重新启动(有效)

上一个迁移文件:

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateCommentsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('comments', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('post_id');
            $table->string('body');
            $table->timestamps();
        });
    }

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

更改的迁移文件:

    <?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateCommentsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('comments', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('post_id');
            $table->string('body');
            $table->timestamps();
        });
    }

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

我在up函数的change文件中添加了user_id

Answer 1

试试这个对我有用的命令

php artisan migrate:fresh

但是，要小心!此命令将从您的数据库中删除所有数据:

Note: The migrate:fresh command will drop all tables from the database and then execute the migrate command.

as per Laravel docs 9.x .