Rails迁移语法错误

Question

我在尝试.getsmaller：

时看到此错误

rake db:migrate

据我所见，我在迁移文件中看不到任何新行：

/db/migrate/20180124161533_a_dd_uid_to_appuser_and_response.rb:22: syntax error, unexpected '\n', expecting =>

知道问题是什么吗？

Answer 1

以下是修改代码的示例。只需在所有行的,语句之前删除if。例如，行：

add_column :appusers, :archived, :boolean, algorithm: :concurrently, if !column_exists?(:appusers, :archived)

应该是：

add_column :appusers, :archived, :boolean, algorithm: :concurrently if !column_exists?(:appusers, :archived)