Rails为关联模型形成多个复选框

时间:2016-02-10 12:23:55

标签: ruby-on-rails forms ruby-on-rails-4 activerecord

我正在创建一个提交"提交的应用程序"可以使用创建客户详细信息的表单进行,并允许"推荐"根据可提供所需服务的分支来创建

class Submission < ActiveRecord::Base
  has_many :referrals, :inverse_of => :submission, dependent: :delete_all
  accepts_nested_attributes_for :referrals, :allow_destroy => true
end

class Referral < ActiveRecord::Base
  belongs_to :submission
end

class Branch < ActiveRecord::Base
  has_many :referrals
end

提交控制器:

def new
  @submission = Submission.new
  @submission.build_client
  @submission.client.build_address
  @submission.referrals.build
end

def submission_params
  params.require(:submission).permit(:consent, :user_id, client_attributes:
    [:client_id, :first_name,
      address_attributes:
        [:first_line, :second_line,]
    ],
    referrals_attributes:
      [:branch_id]
  )
end

提交表格:

<%= form_for(@submission) do |f| %>
  <%= f.fields_for :referrals do |referral| %>
    <%= render 'referral_fields', f: referral %>
  <% end %>
<% end %>

_referral_fields.html.erb:

    <% Branch.all.where(referrable: true).each do |branch| %>
       <label>
          <%= check_box_tag 'branch_ids[]', branch.id %>
          <%= branch.name %>
       </label>
    <% end %>

我想要的是为每个可引用分支设置复选框。勾选分支并创建提交时,将为该分支创建引用。但是,当我提交表单时,我得到的验证错误是&#34;引荐不能为空白&#34;。知道为什么这不起作用吗?

非常感谢任何帮助

1 个答案:

答案 0 :(得分:3)

使用collection_check_boxes

<% # _referral_fields.html.erb %>
<%= f.collection_check_boxes(:branch_ids, Branch.where(referrable: true), :id, :name) do |b|
  b.label { b.check_box } # wraps check box in label
end %>

您需要将submission[referrals_attributes][branch_ids]列入白名单 - 而不是branch_id

def submission_params
  params.require(:submission)
    .permit(
      :consent, 
      :user_id, 
      client_attributes: [
        :client_id, 
        :first_name,
        address_attributes: [
          :first_line, :second_line,
        ]
    ],
    referrals_attributes: [:branch_ids]
  )
end

编辑。

然而,要使其工作,您需要在Referral和Branch之间设置关系。在这种情况下,您可以使用has_and_belongs_to_many(HABTM)或has_many though:(HMT)关系。

请参阅Choosing Between has_many :through and has_and_belongs_to_many

class Referral < ActiveRecord::Base
  belongs_to :submission
  has_and_belongs_to_many :branches
end

class Branch < ActiveRecord::Base
  has_and_belongs_to_many :referrals
end

您还需要创建一个连接表:

rails g migration CreateBranchReferralJoinTable branch referral