我有时间表模型,运行模型和运动员模型。
class Timesheet < ActiveRecord::Base
has_many :runs, :dependent => :destroy
accepts_nested_attributes_for :runs
end
class Run < ActiveRecord::Base
belongs_to :timesheet
belongs_to :athlete
end
class Athlete < ActiveRecord::Base
has_many :runs
end
运行嵌套在Timesheets下,我想在创建时间表的同一表单上创建一些运行,如此railscast
所示class TimesheetsController < ApplicationController
def new
@timesheet = Timesheet.new
3.times { @timesheet.runs.build }
end
在我的时间表表格中,我遇到了我的collection_select问题(运动员名称下拉,填写了运行表中的:athlete_id字段)。
<% form_for(@timesheet) do |f| %>
<%= f.error_messages %>
<%= f.label "Date" %>
<%= f.text_field :date %>
<% f.fields_for :runs do |builder| %>
<%= collection_select(:run, :athlete_id, Athlete.all(:order => 'name'), :id, :name, { :prompt => 'Select Athlete' } ) %>
<% end %>
<%= f.submit 'Create' %>
<% end %>
是否可以使用如上所示的collection_select填充Run的:athlete_id字段,在Timesheet的嵌套表单中,或者我错过了什么?
答案 0 :(得分:15)
看起来你没有在表单构建器上创建集合选择,尝试这样的事情:
<% f.fields_for :runs do |r| %>
<%= r.collection_select(:athlete_id, Athlete.all(:order => 'name'), :id, :name, { :prompt => 'Select Athlete' } ) %>
<% end %>