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我想使用选择标签来保存父项中的多个嵌套子项。导轨 - 多个嵌套属性
这是我在看
Couldn't find all UserLocations with IDs (1, 2) (found 0 results, but was looking for 2)
错误我有Rails 4
和Devise
下以下设置:
用户
class User < ActiveRecord::Base
has_many :user_locations
accepts_nested_attributes_for :user_locations, :allow_destroy => true
end
用户位置(罗阳离子用户有)
class UserLocation < ActiveRecord::Base
belongs_to :user
belongs_to :location
end
位置(位置预设列表中,用户可以在选择)
class Location < ActiveRecord::Base
has_many :user_locations
has_many :users, through: :user_locations
end
然而,试图保存选定UserLocations
时,他们将不会被保存。
Rails的选择标记(您可以选择多个项目)
<%= f.select :user_location_ids, options_for_select(Location.all.collect { |l| [ l.name, l.id ] }, @user.user_locations.collect{ |l| l.id }), {}, { multiple: true } %>
我已经把user_location_ids
我application_controller
作为user_location_ids: []
干杯