Question

我的主页表单与控制器之间创建数据库对象的东西在我尝试加载页面时给出了标题中的错误。不确定是什么导致它，这里是相关的文件/代码：

home.html.erb

<%= form_for :colours do |f| %>
    <span class="form-group">
      <%= f.text_field :colour, required: true, class: "balloon", id: "colour", placeholder: "Colour category (red, blue..)" %><label for="colour">Colour</label>
    </span>
    <span class="form-group">
      <%= f.number_field :bold, required: true, class: "balloon-num", id: "bold", min: 1, max: 12, placeholder: "1-12" %><label for="bold">Boldness</label>
    </span>
    <span class="form-group">
      <%= f.number_field :bright, required: true, class: "balloon-num", id: "bright", min: 1, max: 12, placeholder: "1-12" %><label for="bright">Brightness</label>
    </span>
    <span class="form-group">
      <%= f.number_field :num, required: true, class: "balloon-num", id: "num", min: 1, max: 5, placeholder: "1-5" %><label for="num"># Colours</label>
    </span>
    <span class="form-group">
     <button class="button" id="generate" type="submit"><i class="fi-arrow-right"></i></button>
    </span>
  <% end %>

控制器/ colours_controller.rb

class ColoursController < ApplicationController
  def home
    @colours = Colours.new
  end
  def create
    @colours = Colours.new(colours_params)
    if @colours.save
      redirect_to root_path
    else
      redirect_to root_path, notice: "Error."
    end
  end
  private
  def colours_params
    params.require(:colours).permit(:colour, :bold, :bright, :num)
  end
end

控制器/ pages_controller.rb

class PagesController < ApplicationController
    def home
        @colours = Colours.new
    end
    private
    def colours_params
        params.require(:colours).permit(:colour, :bold, :bright, :num)
    end
end

配置/ routes.rb中

Rails.application.routes.draw do
  root to: 'pages#home'
  resources :colour, only: [:home, :create]
end

分贝/迁移/ 20161215012944_create_colours.rb

class CreateColours < ActiveRecord::Migration[5.0]
  def change
    create_table :colours do |t|
      t.string :colour
      t.integer :bold
      t.integer :bright
      t.integer :num
      t.timestamps
    end
  end
end

模型/ colours.rb

class Colours < ActiveRecord::Base

end

我一直在寻找和问人们一整天都没有运气，希望有人能在这里看到我的错误并向我解释如何纠正它。谢谢！

更新将form_for标记中的“：colors”更改为“@colours”，现在收到以下错误：

undefined method `colours_index_path' for #<#<Class:0x007fe711dbfab0>:0x007fe704401058>
Did you mean?  colours_path

更新2 在控制台中，'bundle exec rails routes'返回：

Prefix Verb URI Pattern       Controller#Action
        root GET  /                 pages#home
colour_index POST /colour(.:format) colour#create

更新3 在控制台中运行rails路由返回：

Prefix Verb   URI Pattern                Controller#Action
        root GET    /                          pages#home
colour_index GET    /colour(.:format)          colour#index
             POST   /colour(.:format)          colour#create
  new_colour GET    /colour/new(.:format)      colour#new
 edit_colour GET    /colour/:id/edit(.:format) colour#edit
      colour GET    /colour/:id(.:format)      colour#show
             PATCH  /colour/:id(.:format)      colour#update
             PUT    /colour/:id(.:format)      colour#update
             DELETE /colour/:id(.:format)      colour#destroy

Answer 1

您的表单是问题所在：

<%= form_for :colours do |f| %>

更改它以便它使用您在主动作中定义的实例变量。

<%= form_for @colours do |f| %>

Pages＃Home中的NoMethodError：＃<colors：0x007fe71261c708>未定义方法'color'

1 个答案: