我正在设置nested_form gem,如下所述:https ://github.com/ryanb/nested_form 。
问题是我的 f.fields_for 似乎空空如也。我没有任何错误,但在页面上我只看到“添加位置”链接,它什么都不做。
数据模型是 Events => event_locations <= Locations,event_locations 充当联结对象。
这是我认为的表格:
<%= nested_form_for @event do |f| %>
<%= @event.locations %>
<%= f.fields_for :locations do |task_form| %>
<%= task_form.text_field :name %>
<%= task_form.link_to_remove "Remove this Location" %>
<% end %>
<p><%= f.link_to_add "Add a Location", :locations %></p>
<% end %>
这是我的事件控制器:
def new
logger.debug "*** before Event.new"
@event = Event.new
logger.debug "*** after Event.new"
3.times do
@event.locations.build
end
end
事件.rb
has_many :days_events
has_many :events_locations
has_many :locations, :through => :events_locations
# Validations
validates_presence_of :name
accepts_nested_attributes_for :locations
event_location.rb
belongs_to :event
belongs_to :location
accepts_nested_attributes_for :location
位置.rb
has_many :events_locations
has_many :events, :through => :events_locations
#validations
validates_presence_of :name
accepts_nested_attributes_for :events