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问Laravel 9-不能声明类CreateUsersTable，因为名称已经在使用中了
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Stack Overflow用户

提问于 2022-06-21 13:30:22

回答 2查看 1.2K关注 0票数 0

我删除了继Laravel之后的迁移文件，并创建了一个新的迁移文件。血干了，我干了这么久。迁移文件中的类名是CreateUsersTable，我将其更改为CreateUserTable.。我删除了数据库从一开始..。我清理了Laravel的藏身处但是..。字面上什么都没有..。它把它藏在哪里？1-2小时前，我删除了另一个迁移文件，但Laravel并不真正关心它，它在哪里呢？

错误消息：

 Illuminate\Database\QueryException 

C:\xampp\htdocs\chikchika>php artisan migrate
Migration table created successfully.
Migrating: 2014_10_12_100000_create_password_resets_table
Migrated:  2014_10_12_100000_create_password_resets_table (9.05ms)
Migrating: 2019_08_19_000000_create_failed_jobs_table
Migrated:  2019_08_19_000000_create_failed_jobs_table (11.17ms)
Migrating: 2019_12_14_000001_create_personal_access_tokens_table
Migrated:  2019_12_14_000001_create_personal_access_tokens_table (24.01ms)
Migrating: 2022_06_21_083427_followers
Migrated:  2022_06_21_083427_followers (6.22ms)
Migrating: 2022_06_21_084259_email_verification
Migrated:  2022_06_21_084259_email_verification (6.40ms)
Migrating: 2022_06_21_084605_search_keywords
Migrated:  2022_06_21_084605_search_keywords (7.15ms)
Migrating: 2022_06_21_084834_dm_conversition
Migrated:  2022_06_21_084834_dm_conversition (7.65ms)
Migrating: 2022_06_21_085432_dm_messages
Migrated:  2022_06_21_085432_dm_messages (6.13ms)
Migrating: 2022_06_21_085828_posts
Migrated:  2022_06_21_085828_posts (5.89ms)
Migrating: 2022_06_21_090526_post_files    
Migrated:  2022_06_21_090526_post_files (6.21ms)
Migrating: 2022_06_21_090756_post_reactions
Migrated:  2022_06_21_090756_post_reactions (6.63ms)
Migrating: 2022_06_21_091042_comments
Migrated:  2022_06_21_091042_comments (7.98ms)
Migrating: 2022_06_21_092616_comment_reactions
Migrated:  2022_06_21_092616_comment_reactions (6.44ms)
Migrating: 2022_06_21_092807_system
Migrated:  2022_06_21_092807_system (11.89ms)
PHP Fatal error:  Cannot declare class CreateUsersTable, because the name is already in use in C:\xampp\
htdocs\chikchika\database\migrations\2022_06_21_124328_users.php on line 7

   Symfony\Component\ErrorHandler\Error\FatalError 

  Cannot declare class CreateUsersTable, because the name is already in use

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_users.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕
  ➜   7▕ class CreateUsersTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.
     11▕      *


   Whoops\Exception\ErrorException 

  Cannot declare class CreateUsersTable, because the name is already in use

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_users.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕
  ➜   7▕ class CreateUsersTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.
     11▕      *

  1   C:\xampp\htdocs\chikchika\vendor\filp\whoops\src\Whoops\Run.php:486
      Whoops\Run::handleError("Cannot declare class CreateUsersTable, because the name is already in use
", "C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_users.php")

  2   [internal]:0
      Whoops\Run::handleShutdown()

C:\xampp\htdocs\chikchika>php artisan migrate
PHP Fatal error:  Cannot declare class CreateUserTable, because the name is already in use in C:\xampp\h
tdocs\chikchika\database\migrations\2022_06_21_124328_users.php on line 7

   Symfony\Component\ErrorHandler\Error\FatalError 

  Cannot declare class CreateUserTable, because the name is already in use

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_users.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;

C:\xampp\htdocs\chikchika>php artisan migrate
PHP Fatal error:  Cannot declare class CreateUserTable, because the name is already in use in C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php on line 7

   Symfony\Component\ErrorHandler\Error\FatalError 

  Cannot declare class CreateUserTable, because the name is already in use     

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕ 
  ➜   7▕ class CreateUserTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.
     11▕      *


   Whoops\Exception\ErrorException 

  Cannot declare class CreateUserTable, because the name is already in use

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕ 
  ➜   7▕ class CreateUserTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.

C:\xampp\htdocs\chikchika>php artisan migrate
PHP Fatal error:  Cannot declare class CreateUserTable, because the name is already in use in C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php on line 7

   Symfony\Component\ErrorHandler\Error\FatalError 

  Cannot declare class CreateUserTable, because the name is already in use     

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕ 
  ➜   7▕ class CreateUserTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.
     11▕      *


   Whoops\Exception\ErrorException 

  Cannot declare class CreateUserTable, because the name is already in use

  at C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php:7
      3▕ use Illuminate\Database\Migrations\Migration;
      4▕ use Illuminate\Database\Schema\Blueprint;
      5▕ use Illuminate\Support\Facades\Schema;
      6▕ 
  ➜   7▕ class CreateUserTable extends Migration
      8▕ {
      9▕     /**
     10▕      * Run the migrations.
     11▕      *

  1   C:\xampp\htdocs\chikchika\vendor\filp\whoops\src\Whoops\Run.php:486
      Whoops\Run::handleError("Cannot declare class CreateUserTable, because the name is already in use", "C:\xampp\htdocs\chikchika\database\migrations\2022_06_21_124328_user.php")

  2   [internal]:0
      Whoops\Run::handleShutdown()

C:\xampp\htdocs\chikchika>

这是我的"2022_06_21_124328_user.php"：

<?php

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

class CreateUserTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->id();
            $table->string('username');
            $table->string('name');
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('password');
            $table->timestamp('account_verified')->nullable();
            $table->integer('level')->default(0); // 0 - member, 1 - moder, 2 - admin
            $table->string('bio')->nullable();
            $table->string('avatar')->nullable();
            $table->string('cover')->nullable();
            $table->integer('audience')->default(0); // 0 - public, 1 - private
            $table->timestamp('birth_date')->nullable();
            $table->string('location')->nullable();
            $table->string('website')->nullable();
            $table->integer('disabled')->default(0);
            $table->rememberToken();
            $table->timestamps();
        });
    }

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

laravel

eloquent

laravel-8

laravel-9

php

回答 2

Stack Overflow用户

回答已采纳

发布于 2022-06-21 16:02:56

您可以使用anonymous migration，就像Laravel开始推荐的那样：

<?php
 
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
 
return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('flights', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->string('airline');
            $table->timestamps();
        });
    }
 
    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('flights');
    }
};

参考资料：https://laravel.com/docs/9.x/migrations#migration-structure

票数 1

Stack Overflow用户

发布于 2022-06-21 16:16:13

我希望我的解决方案将帮助您:使您的迁移名与类名相同。因此，如果类名为CreateUserTable，则迁移名称应反映与以下内容完全相同的内容：

CreateUserTable => create_user_table.php

票数 1

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/72701682

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问Laravel 9-不能声明类CreateUsersTable，因为名称已经在使用中了
EN