Question

我在Laravel 5.1上编写了一个迁移，在创建了一个表后，我重命名了表名和列，它运行了MySQL数据库的迁移，但在SQL Server 2008上尝试重命名列和输出失败了下一个错误：

Next Doctrine\DBAL\DBALException: An exception occurred while executing 'SELECT    col.name,
                     type.name AS type,
                     col.max_length AS length,
                     ~col.is_nullable AS notnull,
                     def.definition AS [default],
                     col.scale,
                     col.precision,
                     col.is_identity AS autoincrement,
                     col.collation_name AS collation,
                     CAST(prop.value AS NVARCHAR(MAX)) AS comment -- CAST avoids driver error for sql_variant type
           FROM      sys.columns AS col
           JOIN      sys.types AS type
           ON        col.user_type_id = type.user_type_id
           JOIN      sys.objects AS obj
           ON        col.object_id = obj.object_id
           JOIN      sys.schemas AS scm
           ON        obj.schema_id = scm.schema_id
           LEFT JOIN sys.default_constraints def
           ON        col.default_object_id = def.object_id
           AND       col.object_id = def.parent_object_id
           LEFT JOIN sys.extended_properties AS prop
           ON        obj.object_id = prop.major_id
           AND       col.column_id = prop.minor_id
           AND       prop.name = 'MS_Description'
           WHERE     obj.type = 'U'
           AND       (obj.name = 'roles' AND scm.name = SCHEMA_NAME())':

我需要在两个数据库上进行迁移。我的迁移代码是：

public function up()
{
  Schema::create('cat_tipo_usuario', function (Blueprint $table) {
      $table->increments('id_tipo_usuario');
      $table->string('txt_tipo_usuario');
      $table->timestamps();
  });
  //Se renombra la tabla
  Schema::rename('cat_tipo_usuario','roles');
  //Se cambia el nombre de las columnas
  Schema::table('roles',function($tabla){
    $tabla->renameColumn('id_tipo_usuario','id');
    $tabla->renameColumn('txt_tipo_usuario','nombre');
  });
}

如果我评论我重命名列的行，则迁移正确运行，因此驱动程序和连接运行良好。

Answer 1

我认为导致问题的是您重命名主键字段。

请测试此迁移，看看它是否解决了您的问题：

Schema::table('roles',function($tabla){ $table->dropPrimary('id_tipo_usuario'); $tabla->renameColumn('id_tipo_usuario','id'); $table->primary('id'); $tabla->renameColumn('txt_tipo_usuario','nombre'); });

我认为如果在重命名之前删除主键约束，它应该可以解决！

重命名Laravel 5.1迁移列[SQL SERVER] [Linux]

1 个答案: