我收到这个奇怪的错误,好像甚至没有安装SimpleForm:
undefined method `simple_form_for'
SimpleForm IS 在我的 gemfile 中,我已经安装了:
Using simple_form (2.0.2)
我在 Pow 服务器上运行,所以它每次都会重新启动。
#events_controller.rb
class admin::EventsController < ApplicationController
def new
@event = Event.new
end
#Event.rb
class Event
include Mongoid::Document
field :summary
field :start_date
field :end_date
end
#new.html.haml
= simple_form_for [:admin, @event] do |f|
= f.input :summary
= f.input :start_date
= f.input :end_date
任何想法为什么看起来甚至没有安装SimpleForm?
安装 gem 后是否运行了生成器?在控制台中,您需要运行以下命令:
rails generate simple_form:install
我尝试了以下命令:轨道生成simple_form:安装
而且 - 它没有运行。相反,输出看起来像我给了 rails 一个格式不正确的命令行,它返回了使用文件的副本。
然后,在 RubyMine 中,我再次尝试 - 这次得到了错误回溯 - 第一行如下所示:
/home/user1/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/generators/base.rb:265:in `const_defined?': wrong constant name SimpleForm:installGenerator
在注释掉base.rb中的第265-269行后:
# if last && last.const_defined?(last_name.camelize, false)
# raise Error, "The name '#{class_name}' is either already used in your application " <<
# "or reserved by Ruby on Rails. Please choose an alternative and run " <<
# "this generator again."
# end
并再次运行该命令,我得到:
/home/user1/.rvm/rubies/ruby-2.0.0-p247/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /home/user1/RubymineProjects/TravelAid/bin/rails generate generator simple_form:install -s
create lib/generators/simple_form:install
create lib/generators/simple_form:install/simple_form:install_generator.rb
create lib/generators/simple_form:install/USAGE
create lib/generators/simple_form:install/templates
Process finished with exit code 0
这看起来不错,但我还没有回去检查simple_form是否有效。
在库/生成器下,我有:
simple_form
templates
simple_form_generator.rb
USAGE
simple_form.install
templates
simple_form.install_generator.rb (created about 18 minutes ago - consistent with new)
USAGE
我在 Rubymine 中运行 Rails 4.0.0 和 ruby-2.0.0-p247