我有 2 个具有多对多关联的模型,如下所示:
class User < ActiveRecord::Base
has_many :remark_users, :dependent => :destroy
has_many :designated_remarks, :through => :remark_users, :source => :remark
end
class Remark < ActiveRecord::Base
has_many :remark_users, :dependent => :destroy
has_many :users, :through => :remark_users
accepts_nested_attributes_for :users
end
和关系:
class RemarkUser < ActiveRecord::Base
belongs_to :remark
belongs_to :user
end
应该执行保存的 remarks_controller 操作:
# PATCH Save users
def save_users
@remark = Remark.find(params[:id])
@remark.users.build(params[:remark_user_ids])
@remark.save
end
和形式:
<%= form_for @remark, :url => salveaza_responsabili_remark_path(@remark) do |f| %>
<% @users.each do |user| %>
<%= check_box_tag 'remark[remark_user_ids][]', user.id, @remark.users.include?(user) %>
<%= user.name %>
<% end %>
<%= hidden_field_tag 'remark[remark_user_ids][]', '' %>
<% end %>
Remarks_controller:
params.require(:remark).permit(:description, :suggestion, :origin_details, process_type_id, :origin_id, :remark_user_ids)
用户和备注都已经存在,我需要一个用于创建关联的表单,最好使用复选框。
在控制台中,关联已保存。但是我花了最后一天的时间试图让它在浏览器中工作。我已经阅读了所有我能找到的关于这个问题的资料,但我现在很困惑。
谁能告诉我实际的表单应该是什么样子,以及是否需要在 Controller 中添加任何其他内容?
最佳答案
你的表单没有任何问题,但可以简化为以下内容
<%= form_for @remark, :url => salveaza_responsabili_remark_path(@remark) do |f| %>
<% @users.each do |user| %>
<%= check_box_tag 'user_ids[]', user.id, @remark.users.include?(user) %>
<%= user.name %>
<% end %>
<% end %>
然后在您的 Controller 中,您可以从 params[:user_ids]
def save_users
@remark = Remark.find(params[:id])
# This is where you need to think about things. If the checkbox in the form
# contains all the users for a remark, the following code should work.
#
# @remark.user_ids = params[:user_ids]
# @remark.save
#
# otherwise, you have to loop through each user_id
params[:user_ids].each do |user_id|
@remark.remark_users.create!(user_id: user_id)
end
end
关于ruby-on-rails - rails 4 has_many :through not saving associations,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19923897/