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似乎是空的。我没有任何错误,但在页面上我只看到了"添加位置"链接,它什么也没做。
数据模型为Events=>event_locations<=位置,event_Locations充当连接对象。
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
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
nested_foorms gem有点旧。我建议在修改后的演员阵容中使用瑞恩的代码(http://railscasts.com/episodes/196-nested-model-form-revised)。我认为你需要专业帐户才能看到它,但这是值得的。
或者,按照最初的屏幕演员阵容(http://railscasts.com/episodes/197-nested-model-form-part-2)未经修改和免费,并使用其中的代码。这样你至少知道发生了什么。