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刚开始学习rails,我正在尝试将表单从一个视图传递到另一个视图......我假设这样做的方法是使用部分渲染。

我想将 /users/form 中包含的表单的部分传递给主视图中的 index.html.erb。我只想创建一个新用户,但是来自主视图中的 index.html.erb。

相关代码:

_form.html.erb(在用户视图中)

<%= simple_form_for(@user) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.input :email %>
    <%= f.input :condition, :hint => 'what should we look up for you?'%>
  </div>

  <div class="form-actions">
    <%= f.button :submit, 'Begin curation' %>

  </div>
<% end %>

用户模型(user.rb)

class User < ActiveRecord::Base
  attr_accessible :condition, :email, :name
end

users_controller.rb

class UsersController < ApplicationController
  # GET /users
  # GET /users.json
  def index
    @users = User.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @users }
    end
  end

  # GET /users/1
  # GET /users/1.json
  def show
    @user = User.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @user }
    end
  end

  # GET /users/new
  # GET /users/new.json
  def new
    @user = User.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @user }
    end
  end

  # GET /users/1/edit
  def edit
    @user = User.find(params[:id])
  end

  # POST /users
  # POST /users.json
  def create
    @user = User.new(params[:user])

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: 'Thanks for sharing. We will be back with your curated information in 2-3 days time!' }
        format.json { render json: @user, status: :created, location: @user }
      else
        format.html { render action: "new" }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /users/1
  # PUT /users/1.json
  def update
    @user = User.find(params[:id])

    respond_to do |format|
      if @user.update_attributes(params[:user])
        format.html { redirect_to @user, notice: 'User was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.json
  def destroy
    @user = User.find(params[:id])
    @user.destroy

    respond_to do |format|
      format.html { redirect_to users_url }
      format.json { head :no_content }
    end
  end
end

我确信这是一个简单的解决方法,我只是不知道语法。我检查了其他地方,并没有找到任何对我有帮助的东西。

4

1 回答 1

3

我敢打赌你没有定义@user 变量。SimpleForm 需要一个来自正确模型的实例变量来有效地使用输入字段来发挥它的魔力。如果您的变量未实例化,它会给出该错误。

model_name 在 NilClass 上调用。NilClass 是你的@user。

试试这个:

<%= simple_form_for User.new do |f| %>
...

更新

# app/controllers/users_controller.rb
class UsersController < ApplicationController

  before_filter :prepare_user_form, only: [:index, :new]

  protected

  def prepare_user_form
    @user = User.new
  end

end


# _form.html.erb
<%= simple_form_for @user do |f| %>
...
于 2013-02-03T19:56:50.767 回答