Ruby on rails 具有嵌套属性的Rails表单(接受嵌套属性)
我有一对多的关系:Ruby on rails 具有嵌套属性的Rails表单(接受嵌套属性),ruby-on-rails,nested-attributes,has-many,Ruby On Rails,Nested Attributes,Has Many,我有一对多的关系: class Programa < ActiveRecord::Base attr_accessible :descripcion, :nombre, :roles_attributes has_many :roles, :dependent => :restrict accepts_nested_attributes_for :roles ... end class Role < ActiveRecord::Base attr_ac
class Programa < ActiveRecord::Base
attr_accessible :descripcion, :nombre, :roles_attributes
has_many :roles, :dependent => :restrict
accepts_nested_attributes_for :roles
...
end
class Role < ActiveRecord::Base
attr_accessible :description, :name, :programa_id
belongs_to :programa
...
end
class Programa:限制
接受:角色的\u嵌套\u属性\u
...
结束
类角色
它在rails控制台中工作:
> params = { programa: { nombre: 'nuevo', roles_attributes: [ {name: 'role1'}, {name: 'role2'}] }}
> p = Programa.create(params[:programa])
> p
=> #<Programa id: 7, nombre: "nuevo", descripcion: nil, created_at: "2013-10-09 14:07:46", updated_at: "2013-10-09 14:07:46">
> p.roles
=> [#<Role id: 15, name: "role1", description: nil, created_at: "2013-10-09 14:07:46", updated_at: "2013-10-09 14:07:46", programa_id: 7>, #<Role id: 16, name: "role2", description: nil, created_at: "2013-10-09 14:07:46", updated_at: "2013-10-09 14:07:46", programa_id: 7>]
>params={programma:{nombre:'nuevo',roles_属性:[{name:'role1'},{name:'role2'}]}
>p=Programa.create(参数[:Programa])
>p
=> #
>p.角色
=> [#, #]
但我无法在app/views/programas/\u表单中使其工作:
<%= form_for(@programa) do |f| %>
<%= render 'shared/form_error_messages', object: f.object %>
<div class="field">
<%= f.label :nombre %>
<%= f.text_field :nombre %>
</div>
<div class="field">
<%= f.label :descripcion %>
<%= f.text_field :descripcion %>
</div>
<% f.fields_for :roles do |builder| %>
<div class="field">
<%= builder.label :name %>
<%= builder.text_field :name %>
</div>
<div class="field">
<%= builder.label :description %>
<%= builder.text_field :description %>
</div>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
为了使我的表单显示嵌套属性的角色,是否还需要添加或删除其他内容
这是我的程序控制器:
class ProgramasController < ApplicationController
# GET /programas
# GET /programas.json
def index
@programas = Programa.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: @programas }
end
end
# GET /programas/1
# GET /programas/1.json
def show
@programa = Programa.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: @programa }
end
end
# GET /programas/new
# GET /programas/new.json
def new
@programa = Programa.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: @programa }
end
end
# GET /programas/1/edit
def edit
@programa = Programa.find(params[:id])
end
# POST /programas
# POST /programas.json
def create
@programa = Programa.new(params[:programa])
respond_to do |format|
if @programa.save
format.html { redirect_to @programa, notice: 'Programa was successfully created.' }
format.json { render json: @programa, status: :created, location: @programa }
else
format.html { render action: "new" }
format.json { render json: @programa.errors, status: :unprocessable_entity }
end
end
end
# PUT /programas/1
# PUT /programas/1.json
def update
@programa = Programa.find(params[:id])
respond_to do |format|
if @programa.update_attributes(params[:programa])
format.html { redirect_to @programa, notice: 'Programa was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @programa.errors, status: :unprocessable_entity }
end
end
end
# DELETE /programas/1
# DELETE /programas/1.json
def destroy
@programa = Programa.find(params[:id])
@programa.destroy
respond_to do |format|
format.html { redirect_to programas_url }
format.json { head :no_content }
end
end
end
class ProgramasController
我只希望嵌套属性仅在“编辑和显示”操作中显示。嵌套属性的表单将仅在实际有数据要显示时显示,即如果您的程序实例有一个或多个与其关联的角色 这可以很简单,在呈现表单之前,在控制器中生成
@programa.roles.build
,以添加新角色。将呈现任何现有角色
编辑:您还需要实际呈现表单,即
您的控制器操作是什么样子的?角色的创建是从其他表单进行的。我实际上在角色表中有数据和它对应的程序id。真不敢相信,正式语言!谢谢谢谢,我也忘了=
。当我做第一百次的时候,事情变得模糊了。