Laravel迁移:即使指定，唯一密钥也太长 [英] Laravel migration: unique key is too long, even if specified

问题描述

我正在尝试在Laravel中迁移用户表.当我运行迁移时，出现此错误:

I am trying to migrate a users table in Laravel. When I run my migration I get this error:

[Illuminate \ Database \ QueryException] SQLSTATE [42000]:语法错误 或访问冲突:1071指定的密钥太长；最大密钥长度 是767个字节(SQL:更改表users添加唯一 users_email_uniq(email))

[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_uniq(email))

我的迁移如下:

Schema::create('users', function(Blueprint $table)
{
    $table->increments('id');
    $table->string('name', 32);
    $table->string('username', 32);
    $table->string('email', 320);
    $table->string('password', 64);
    $table->string('role', 32);
    $table->string('confirmation_code');
    $table->boolean('confirmed')->default(true);
    $table->timestamps();

    $table->unique('email', 'users_email_uniq');
});

经过一番谷歌搜索后，我遇到了此错误报告，泰勒说您可以将索引键指定为第二个我已经完成的unique()参数.它仍然给出错误.这是怎么回事?

After some googling I came across this bug report where Taylor says you can specify the index key as the 2nd parameter of unique(), which I have done. It still gives the error. What is going on here?

推荐答案

为电子邮件指定较小的长度:

Specify a smaller length for your e-mail:

$table->string('email', 250);

实际上是默认值:

$table->string('email');

你应该很好.

对于Laravel 5.4，您可以在 Laravel 5.4中找到解决方案:指定的密钥太长错误，Laravel新闻帖子:

For Laravel 5.4 you can find a solution in this Laravel 5.4: Specified key was too long error, Laravel News post:

如要解决此问题的《迁移指南》所述，只需编辑AppServiceProvider.php文件，并在启动方法内设置默认字符串长度即可:

use Illuminate\Database\Schema\Builder;


public function boot()
{
    Builder::defaultStringLength(191);
}

这篇关于Laravel迁移:即使指定，唯一密钥也太长的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！