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Timesheet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
在我的时间表表单上,我遇到了我的collection_select问题(运动员名称的下拉列表填充了运行表中的：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？
解决方法
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,{ :prompt => 'Select Athlete' } ) %>
<% end %>