[英]How to change foreign key reference table name in laravel migration
I have this line in a migration table我在迁移表中有这一行
Schema::create('xyzTableName', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('userId');
$table->foreign('userId')->references('id')->on('userId');
$table->timestamps();
});
where I did write on('userId') by mistake what I want is on('users')我在 ('userId')上写错了我想要的是on('users')
now I did this, (in a new migration, as I can't run migrate:fresh
)现在我这样做了,(在新的迁移中,因为我不能运行
migrate:fresh
)
Schema::create('xyzTableName', function (Blueprint $table) {
$table->foreign('userId')->references('id')->on('users')->change();
});
but I don't why it is not working, please help me但我不知道为什么它不起作用,请帮助我
You can drop the old key and build a new one您可以删除旧密钥并构建一个新密钥
Schema::table('xyzTableName', function (Blueprint $table) {
$table->dropForeign('xyzTableName_users_userId_foreign');
$table->foreign('userId')->references('id')->on('users');
});
Laravel will always try to create the keys using its patterns. Laravel 将始终尝试使用其模式创建键。 Since you didn't follow the name and field pattern recommended by laravel I can't be sure that string 'xyzTableName_users_userId_foreign' will be the correct one.
由于您没有遵循 laravel 推荐的名称和字段模式,我无法确定字符串“xyzTableName_users_userId_foreign”是否正确。
Check in your database the foreign key name.将外键名称签入您的数据库。 This is the command I'd use If MySQL
这是我使用的命令 If MySQL
SELECT
TABLE_NAME,
COLUMN_NAME,
CONSTRAINT_NAME,
REFERENCED_TABLE_NAME,
REFERENCED_COLUMN_NAME
FROM
INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_SCHEMA = 'db_name'
AND REFERENCED_TABLE_NAME = 'table_name'
AND REFERENCED_COLUMN_NAME = 'column_name';
In the Model you can give table with protect.在 Model 中,您可以给表提供保护。
namespace App\Models;
class Category extends Model
{
protected $table = 'new_table_name';
}
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