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我正在設置nested_form gem，如下所述：https://github.com/ryanb/nested_form。nested_form gem的問題
問題是我的f.fields_for似乎回來空了。我沒有任何錯誤，但在頁面上我只看到「添加位置」鏈接，該鏈接什麼都不做。
數據模型是Events => event_locations < =地點，event_locations充當聯結對象。
這裏是在我的視圖的形式：
<%= 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 %>
這是我的事件控制器：
def new
logger.debug "*** before Event.new"
@event = Event.new
logger.debug "*** after Event.new"
3.times do
@event.locations.build
end
end
event.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
location.rb
has_many :events_locations
has_many :events, :through => :events_locations
#validations
validates_presence_of :name
accepts_nested_attributes_for :events