我正在尝试使用fields_for
并创建一个嵌套表单,但是只有一个文本字段显示为空白。我有3个crewmember
记录。crewmember
模型:
class Crewmember < ActiveRecord::Base
belongs_to :production
belongs_to :callsheet
validates :firstname, presence: true
validates :email, presence: true
def name
"#{firstname} #{lastname}"
end
end
callsheet
模型class Callsheet < ActiveRecord::Base
attr_accessible :crewmembers_params
has_many :castmembers
has_many :crewmembers
accepts_nested_attributes_for :crewmembers
end
callsheets
Controller class CallsheetsController < ApplicationController
def index
@callsheets = Callsheet.all
@departments = Department.where(production_id: current_user.default_working_production_id)
end
def show
@callsheet = Callsheet.find(params[:id])
end
def new
@callsheet = Callsheet.new
@departments = Department.where(production_id: current_user.default_working_production_id)
end
def edit
@callsheet = Callsheet.find(params[:id])
end
def create
@callsheet = Callsheet.new(callsheets_params)
@Callsheet.production_id = current_user.default_working_production_id
if @callsheets.save
redirect_to callsheet_path
else
render 'new'
end
end
def update
@callsheet = Callsheet.find(params[:id])
if @callsheet.update(callsheets_params)
redirect_to callsheet_path, :notice => "callsheets successfully updated."
else
render 'edit', :notice => "callsheets not updated."
end
end
def destroy
@callsheet = Callsheet.find(params[:id])
@callsheet.destroy
redirect_to callsheets_path
end
private
def callsheets_params
params.require(:callsheet).permit(:crewmembers_params [:id, :firstname])
end
end
新 call 表的形式:
<%= form_for @callsheet do |f| %>
<% if @callsheet.errors.any? %>
<div id="error_explanation" class="alert alert-danger">
<strong>
<%= pluralize(@callsheet.errors.count, "error") %> prohibited
this call sheet from being saved:
</strong>
<ul>
<% @callsheet.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<%= f.fields_for :crewmember do |crewmember| %>
<fieldset>
<%= crewmember.label :firstname, "First Name" %><br />
<%= crewmember.text_field :firstname %>
</fieldset>
<% end %>
<% end %>
最佳答案
您不需要attr_accessible
(仅适用于Rails 3)。
您还应该将所有模型重命名为 snake_case
,并引用 CamelCase
:
#app/models/call_sheet.rb
class CallSheet < ActiveRecord::Base
has_many :cast_members
has_many :crew_members
accepts_nested_attributes_for :crew_members
end
与
fields_for
的习惯一样,您还需要构建关联的对象(如果要创建new
记录)(如果是editing
则不需要这样做):#app/controllers/call_sheets_controller.rb
class CallSheetsController < ApplicationController
before_action :set_departments
def new
@callsheet = Callsheet.new
@callsheet.crew_members.build
end
def edit
@callsheet = Callsheet.find params[:id]
end
def update
@callsheet = Callsheet.find params[:id]
@callsheet.update callsheet_params
end
private
def set_departments
@departments = Department.where(production_id: current_user.default_working_production_id)
end
def callsheet_params
params.require(:callsheet).permit(crew_members_attributes: [:id, :firstname])
end
end
这将允许您使用:
<%= form_for @callsheet do |f| %>
<%= f.fields_for :crew_members do |crewmember| %>
<%= crewmember.label :firstname, "First Name" %><br />
<%= crewmember.text_field :firstname %>
<% end %>
<%= f.submit %>
<% end %>
-
通过
fields_for
传递嵌套属性时,您需要几个组件:@parent.build_child
)fields_for
定义parameters
我已经概述了如何实现上述目标,而这些都是您不正确的。
您还可以在同一调用中声明多个验证:
#app/models/crew_member.rb
class CrewMember < ActiveRecord::Base
validates :firstname, :email, presence: true
end
关于ruby-on-rails - Rails fields_for不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34940338/