Question

不是我发现的Postgres的第一个Rails 4迁移错误，如果它确实是一个bug。

我无法弄清楚为什么这种非常简单的迁移不起作用：

class AddAdminToUsers < ActiveRecord::Migration
  def change
    add_column :users, :admin, :boolean, { default: false, null: false }
  end
end

我已经尝试了有和没有花括号。这是错误：

== AddAdminToUsers：迁移========================================== ====== - add_column（：users，：admin，：boolean，{：default =＆gt; false，：null =＆gt; false}）耙子流产了！发生错误，此操作和所有后续迁移都已取消：

wrong number of arguments (2 for 1)/Users/me/.rvm/gems/ruby-2.0.0-p353@myapp/gems/rails_best_practices-1.15.0/lib/rails_best_practices/core_ext/object.rb:7:in `try'
/Users/me/.rvm/gems/ruby-2.0.0-p353@myapp/gems/activerecord-4.0.2/lib/active_record/connection_adapters/postgresql_adapter.rb:723:in `translate_exception'
/Users/me/.rvm/gems/ruby-2.0.0-p353@myapp/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_adapter.rb:439:in `rescue in log'
/Users/me/.rvm/gems/ruby-2.0.0-p353@myapp/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_adapter.rb:435:in `log'
/Users/me/.rvm/gems/ruby-2.0.0-p353@myapp/gems/activerecord-4.0.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:127:in `execute'

documentation非常清楚这是允许的：

add_column(table_name, column_name, type, options): 
  Adds a new column to the table called table_name named
  column_name specified to be one of the following types:
    :string, :text, :integer, :float, :decimal, :datetime,
    :timestamp, :time, :date, :binary, :boolean. 
A default value can be specified by passing an options
  hash like { default: 11 }. 
Other options include :limit and :null (e.g. { limit: 50, null: false })

另外，为什么rails-best-practices宝石会抱怨？我不是在调用它。

Answer 1

这似乎是rails_best_practices gem中的一个错误。当我卸载那个gem时，代码可以运行。我会通知宝石维护者。

在Postgres上进行简单迁移时出现4个错误

1 个答案: