Laravel php artisan 在空数据库上迁移错误

Question

奇怪的事情正在发生。一直在尝试运行迁移，php artisan migrate但出现以下关于缺少表（应该由迁移创建和填充）的错误。

PHP Fatal error:  Uncaught PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'app.portals' doesn't exist in /home/daniel/Programming/app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:80
Stack trace:
#0 /home/daniel/Programming/app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(80): PDO->prepare('select * from `...', Array)
#1 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(326): Doctrine\DBAL\Driver\PDOConnection->prepare('select * from `...')
#2 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(657): Illuminate\Database\Connection->Illuminate\Database\{closure}('select * from `...', Array)
#3 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(624): Illuminate\Database\Connection->runQueryCallback('select * from `...', Array, Object(Closure))
#4 /home/daniel/Programming/app/vendor/laravel in /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 664
PHP Fatal error:  Uncaught PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'app.portals' doesn't exist in /home/daniel/Programming/app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:80
Stack trace:
#0 /home/daniel/Programming/app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(80): PDO->prepare('select * from `...', Array)
#1 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(326): Doctrine\DBAL\Driver\PDOConnection->prepare('select * from `...')
#2 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(657): Illuminate\Database\Connection->Illuminate\Database\{closure}('select * from `...', Array)
#3 /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php(624): Illuminate\Database\Connection->runQueryCallback('select * from `...', Array, Object(Closure))
#4 /home/daniel/Programming/app/vendor/laravel in /home/daniel/Programming/app/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 664

Laravel 版本：5.5.*

PHP 版本：7.1

背景故事：

我决定在新的本地数据库安装上工作，而不是总是依赖远程数据库。然后我发现工匠不再工作了。

尝试：

我可以得到的每一个工匠命令，但它们都不起作用，因为甚至php artisan --help抛出了上面的错误......

我还尝试克隆 repo 作为一个新的开始，然后检查我正在处理的分支，并php artisan migrate以相同的错误运行。

迁移：

我不能发布所有这些，但是有一个迁移可以构建丢失的表：

<?php

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

class CreatePortalLinks extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('portal_viewer_user', function (Blueprint $table) {
            $table->integer('viewer_user_id');
            $table->integer('portal_id');
        });

        Schema::create('admin_user_portal', function (Blueprint $table) {
            $table->integer('admin_user_id');
            $table->integer('portal_id');
        });

        Schema::create('portals', function (Blueprint $table) {
            $table->increments('id');
            $table->string('identifier');
            $table->timestamps();
        });
    }

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

Answer 1

错误原因：

错误是由 Laravel 服务提供者在其构造函数中具有数据库查询引起的。

事实证明 - 我不知道这一点 - Laravel 服务提供者在运行 artisan 时会被实例化。

解决方案：

一旦我在我的服务提供者中进行了一些验证，以阻止在 artisan 命令上发生查询，运行php artisan migrate:install, php artisan migrate:fresh，php artisan migrate --seed并由数据库填充所有必要的表和记录。