Laravel 5 为什么回滚提升不能删除索引错误?
在我的Laravel5.7应用程序中,我需要将其他表中的表和引用添加到创建的表中。 我制作了2个迁移文件和 migrate命令运行正常 但是运行回滚时我有一个错误:Laravel 5 为什么回滚提升不能删除索引错误?,laravel-5,migration,Laravel 5,Migration,在我的Laravel5.7应用程序中,我需要将其他表中的表和引用添加到创建的表中。 我制作了2个迁移文件和 migrate命令运行正常 但是运行回滚时我有一个错误: $ php artisan migrate Migrating: 2020_03_08_162307_create_colors_table Migrated: 2020_03_08_162307_create_colors_table Migrating: 2020_03_08_162642_add_color_storage_
$ php artisan migrate
Migrating: 2020_03_08_162307_create_colors_table
Migrated: 2020_03_08_162307_create_colors_table
Migrating: 2020_03_08_162642_add_color_storage_spaces_table
Migrated: 2020_03_08_162642_add_color_storage_spaces_table
serge@athoe:/mnt/_work_sdb8/wwwroot/lar/BoxBooking2$ php artisan migrate:rollback
Rolling back: 2020_03_08_162642_add_color_storage_spaces_table
Illuminate\Database\QueryException : SQLSTATE[HY000]: General error: 1553 Cannot drop index 'storage_spaces_color_id_foreign': needed in a foreign key constraint (SQL: alter table `storage_spaces` drop index `storage_spaces_color_id_foreign`)
at /mnt/_work_sdb8/wwwroot/lar/BoxBooking2/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 Doctrine\DBAL\Driver\PDOException::("SQLSTATE[HY000]: General error: 1553 Cannot drop index 'storage_spaces_color_id_foreign': needed in a foreign key constraint")
/mnt/_work_sdb8/wwwroot/lar/BoxBooking2/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php:119
2 PDOException::("SQLSTATE[HY000]: General error: 1553 Cannot drop index 'storage_spaces_color_id_foreign': needed in a foreign key constraint")
/mnt/_work_sdb8/wwwroot/lar/BoxBooking2/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php:117
Please use the argument -v to see more details.
这些文件是:
2020_03_08_162307_创建_颜色_table.php:
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateColorsTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('colors', function (Blueprint $table) {
$table->smallIncrements('id');
$table->string('color', 10)->unique();
$table->string('title', 50)->unique();
$table->enum('status', [ 'BU', 'UDL', 'UBPNCI', 'R' , 'NPC' , 'AUWN' , 'A' ])->nullable()->comment(', BU=>Booked Units / Client Checked-In already, UDL=>Units Double Locked, UBPNCI - Unit Booked/Paid, not check-in, R - Reserved, AUWN - Available Units with notes (For repair, with water leakage, under maintenance & etch...), NPC - Non Paying Clients, A=>Available');
$table->timestamp( 'created_at')->useCurrent();
});
Artisan::call('db:seed', array('--class' => 'AdColorsWithInitData'));
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::dropIfExists('colors');
}
}
您的错误是:
无法删除索引“存储空间颜色id外部”
索引名称应在dropForeign函数中匹配
试试看,希望能奏效
Schema::table('storage_spaces', function (Blueprint $table) {
$table->dropForeign('storage_spaces_color_id_foreign);
$table->dropColumn('color_id');
});
您的错误是:
无法删除索引“存储空间颜色id外部”
索引名称应在dropForeign函数中匹配
试试看,希望能奏效
Schema::table('storage_spaces', function (Blueprint $table) {
$table->dropForeign('storage_spaces_color_id_foreign);
$table->dropColumn('color_id');
});