accepts_nested_attributes_for:我做错了什么 [英] accepts_nested_attributes_for: What am I doing wrong

问题描述

我尝试在 rails4 中创建一对多连接.但是，虽然我没有收到错误消息，但未存储嵌套属性.

我做错了什么?

站模型

class Station 

地址模型

 类地址 

站控制器类 StationsController <应用控制器

 def new@station = [e-mail]结尾定义创建@station = Station.new(station_params)@station.save重定向到@station结尾定义索引@stations = Station.all结尾私人的def station_paramsparams.require(:station).permit(:name, adresses_attributes: [:url])结尾结尾

站:new.html.erb

<%= form_for :station, url:station_path do |station|％＞<p><%= station.label :name %><br/><%= station.text_field :name %></p><%= station.fields_for :adresses do |adress|％＞<div class="field"><p><%= adress.label :url %><br/><%= adress.text_field :url %></p>

<%结束%><p><%= station.submit %></p><%结束%>


我构建了这个问题的一个最小示例，并将其记录为此处的分步说明:https://groups.google.com/forum/#!topic/rubyonrails-talk/4RF_CFChua0

解决方案

你应该使用 form_for @station 而不是 form_for :station(使用实例而不是符号).

干杯

I try do create a one-to-many connection in rails4. However, although I don't get an error, the nested attribute is not stored.

What am I doing wrong?

Station-Models

class Station < ActiveRecord::Base
    has_many :adresses

    accepts_nested_attributes_for :adresses
end

Adress-Model

    class Adress < ActiveRecord::Base
        belongs_to :station
    end

Station-Controller class StationsController < ApplicationController

    def new
        @station = Station.new
        @station.adresses.build
    end

    def create
        @station = Station.new(station_params)
        @station.save
        redirect_to @station
    end

    def index
        @stations = Station.all
    end

private

    def station_params
        params.require(:station).permit(:name, adresses_attributes: [ :url ])
    end

end

Station: new.html.erb

<%= form_for :station, url: stations_path do |station| %>
    <p>
        <%= station.label :name %><br />
        <%= station.text_field :name %>
    </p>
    <%= station.fields_for :adresses do |adress| %>
        <div class="field">
            <p>
                <%= adress.label :url %><br />
                <%= adress.text_field :url %>
            </p>
        </div>
    <% end %>
    <p>
        <%= station.submit %>
    </p>
<% end %>

[edit]
I constructed a minimal example of this problem and documented it as a step-by-step instruction here: https://groups.google.com/forum/#!topic/rubyonrails-talk/4RF_CFChua0

解决方案

You should use form_for @station instead of form_for :station (use an instance instead of a symbol).

Cheers

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