Question

我使用以下脚手架

创建了此表单

rails generate scaffold Adminlocations city:string state:string zip:integer long:integer lat:integer

当我在表单中输入新位置时，我收到以下错误:(我没有看到＆＃34;加入＆＃34;编码中的任何地方）

2014-04-30 08:15:21 INFO -- Processing by AdminlocationsController#create as HTML
2014-04-30 08:15:21 INFO --   Parameters: {"utf8"=>"✓", "authenticity_token"=>"U27TufEFF9UYznNMB/OzkEIEPSSBScKqPH/MOdzC9kQ=", "adminlocation"=>{"city"=>"Springfield", "state"=>"Mo", "zip"=>"65803", "long"=>"123", "lat"=>"123"}, "commit"=>"Create Adminlocation"}
2014-04-30 08:15:21 INFO -- Redirected to 
2014-04-30 08:15:21 INFO -- Completed 500 Internal Server Error in 539ms
2014-04-30 08:15:21 FATAL -- 
NoMethodError (undefined method `join' for nil:NilClass):
  app/controllers/adminlocations_controller.rb:40:in `block (2 levels) in create'
  app/controllers/adminlocations_controller.rb:38:in `create'


2014-04-30 08:15:21 INFO -- Processing by InfoController#error as HTML
2014-04-30 08:15:21 INFO --   Parameters: {"utf8"=>"✓", "authenticity_token"=>"U27TufEFF9UYznNMB/OzkEIEPSSBScKqPH/MOdzC9kQ=", "adminlocation"=>{"city"=>"Springfield", "state"=>"Mo", "zip"=>"65803", "long"=>"123", "lat"=>"123"}, "commit"=>"Create Adminlocation"}
2014-04-30 08:15:21 INFO --   Rendered info/error.html.haml within layouts/application (0.3ms)
2014-04-30 08:15:22 INFO --   Rendered shared/_navbar.html.haml (300.7ms)
2014-04-30 08:15:22 INFO --   Rendered shared/_footer.html.haml (0.3ms)
2014-04-30 08:15:22 INFO -- Completed 200 OK in 617ms (Views: 30.5ms | ActiveRecord: 575.7ms)
2014-04-30 08:15:22 INFO --

这是控制器中的相应区块

  def create
    @adminlocation = Adminlocation.new(params[:adminlocation])
    respond_to do |format|
      if @adminlocation.save
        format.html { redirect_to @adminlocation, notice: 'Adminlocation was successfully created.' }
        format.json { render json: @adminlocation, status: :created, location: @adminlocation }
      else
        format.html { render action: "new" }
        format.json { render json: @adminlocation.errors, status: :unprocessable_entity }
      end
    end
  end

这是生成表单的输出：

[root@digihaul3-pc current]# rails generate scaffold Adminlocations city:string state:string zip:integer long:integer lat:integer
        SECURITY WARNING: No secret option provided to Rack::Session::Cookie.
        This poses a security threat. It is strongly recommended that you
        provide a secret to prevent exploits that may be possible from crafted
        cookies. This will not be supported in future versions of Rack, and
        future versions will even invalidate your existing user cookies.

        Called from: /home/deployer/loadmax/shared/bundle/ruby/1.9.1/gems/actionpack-3.2.3/lib/action_dispatch/middleware/session/abstract_store.rb:28:in `initialize'.

Plural version of the model detected, using singularized version. Override with --force-plural.
      invoke  active_record
      create    db/migrate/20140429172723_create_adminlocations.rb
      create    app/models/adminlocation.rb
      invoke    test_unit
      create      test/unit/adminlocation_test.rb
      create      test/fixtures/adminlocations.yml
       route  resources :adminlocations
      invoke  scaffold_controller
      create    app/controllers/adminlocations_controller.rb
      invoke    erb
      create      app/views/adminlocations
      create      app/views/adminlocations/index.html.erb
      create      app/views/adminlocations/edit.html.erb
      create      app/views/adminlocations/show.html.erb
      create      app/views/adminlocations/new.html.erb
      create      app/views/adminlocations/_form.html.erb
      invoke    test_unit
      create      test/functional/adminlocations_controller_test.rb
      invoke    helper
      create      app/helpers/adminlocations_helper.rb
      invoke      test_unit
      create        test/unit/helpers/adminlocations_helper_test.rb
      invoke  assets
      invoke    coffee
      create      app/assets/javascripts/adminlocations.js.coffee
      invoke    scss
      create      app/assets/stylesheets/adminlocations.css.scss
      invoke  scss
      create    app/assets/stylesheets/scaffolds.css.scss

我必须手动创建数据库并为其提供正确的权限

请求信息

class Adminlocation < ActiveRecord::Base
  attr_accessible :city, :lat, :long, :state, :zip
end

Answer 1

尝试：

rails generate scaffold Adminlocation city:string state:string zip:integer long:integer lat:integer

在rails generate scaffold中您提供了型号名称。型号名称应该始终是单数！（看看你的错误消息）

NoMethodError（未定义的方法`join＆＃39; for nil：NilClass）：

1 个答案: