刚开始学习rails,我正试图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partial传递给home视图中的index.html.erb。我只想创建一个新用户,但是在主视图中从index.html.erb。
相关守则:
_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
我确定这是一个简单的修复,我只是不知道语法。我检查了其他地方,但没有找到任何可以帮助我的地方。
答案 0 :(得分:3)
我敢打赌我的生活中你没有定义@user变量。 SimpleForm需要来自正确模型的实例变量才能有效地利用输入字段实现其魔力。如果您的变量未实例化,则会出现该错误。
在NilClass上调用model_name。 NilClass是你的@user。
请改为尝试:
<%= simple_form_for User.new do |f| %>
...
# 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| %>
...