在 laravel 中创建 table 期间出现迁移错误

Question

我在 laravel 项目中使用 xampp 作为服务器。创建迁移时，我遇到错误：只能创建一个迁移 table；其他人没有被创造。

这是错误：

**Migration table created successfully.
Migrating: 2014_10_12_000000_create_users_table
   Illuminate\Database\QueryException  : SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length
is 767 bytes (SQL: alter table `users` add unique `users_email_unique`(`email`))
  at C:\xampp\htdocs\lsapp\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664

    660|         // If an exception occurs when attempting to run a query, we'll format the error
    661|         // message to include the bindings with SQL, which will make this exception a
    662|         // lot more helpful to the developer instead of just
the database's errors.
    663|         catch (Exception $e) {
  > 664|             throw new QueryException(
    665|                 $query, $this->prepareBindings($bindings), $e    666|             );
    667|         }
    668|
  Exception trace:
  1   PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes")
      C:\xampp\htdocs\lsapp\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458
  2   PDOStatement::execute()
      C:\xampp\htdocs\lsapp\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458**

Answer 1

更新配置文件夹中的 database.php 文件，如下所示

'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',

至

'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',

它应该可以工作。如果它不起作用，请更新 app/Providers/ 中的 AppServiceProvider.php，如下所示。

use Illuminate\Support\Facades\Schema; //Import Schema

function boot()
{
    Schema::defaultStringLength(191); //Solved by increasing StringLength
}

Answer 2

你可以试试这个：

AppServiceProvider.php

use Illuminate\Support\Facades\Schema; //Import Schema

function boot()
{
    Schema::defaultStringLength(191); 
}

希望对您有所帮助。

在 laravel 中创建 table 期间出现迁移错误

Migration error during creation of table in laravel

laravel-5.7