Question

我正在尝试构建嵌套表单，用户可以在其中为创建的每个邀请添加一个或多个时隙。

在Invitations视图中，我有_form.html.erb：

<%= simple_form_for invitation, id: "invitation_form", :remote => true do |f| %>
    <div class="col-md-12">
      <%= f.error_notification %>
      <%= f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present? %>
      <%= f.collection_select(:guest_id, User.all, :id, :full_name, {}, class: "selectpicker", title: "Choose recipient", multiple: true) %>
      <br>
      <br>
    </div>
    <br><br>
    <div class="col-md-12">
      <%= f.collection_select(:type_of_event, @type_evenement, :id, :type_name, {:include_blank => true}, class: "selectpicker", title: "Type", multiple: false) %>
      <br>
    </div>
    <div class="col-md-12">
      <br>
      <%= f.collection_select(:event_id, @events_list, :id, :title, {:include_blank => true}, class: "selectpicker", title: "Related event (Optional)", multiple: false) %>
      <br>
      <br>
      <%= f.input :title, placeholder: "Title", label: false %>
      <%= f.text_area :memo, placeholder: "Start writing", class: "form form-control", rows: 10 %>
      <div class="fields">
        <%= f.simple_fields_for :invsession do |builder| %>
          <%= render 'invitations/invsession_fields', f: builder %>
        <% end %>
      </div>
      <div class="form-actions">
        <br>
        <%= f.button :submit, class: "btn btn-primary" %>
      </div>
    </div>

  <% end %>

在同一“邀请”视图中，我有部分_invsession_fields.html.erb

<tr>
  <td>
    <%= f.input_field :_destroy, as: :hidden %>
    <%= link_to 'Delete', '#', class: 'remove_record' %>
  </td>
  <td>
    <div class='input-group date' id='datetimepicker2'>
      <%= f.text_field :start, :class => "form-control" %>
      <span class="input-group-addon">
              <span class="glyphicon glyphicon-calendar"></span>
          </span><br>
    </div>
  </td>
  <td>
    <div class='input-group date' id='datetimepicker3'>
      <%= f.text_field :end, :class => "form-control" %>
      <span class="input-group-addon">
              <span class="glyphicon glyphicon-calendar"></span>
          </span>
    </div>
  </td>
</tr>

在我的Invitation controller中：

  def new
        @type_evenement = TypeEvenement.all
        @invitation = current_user.invitations.build(invitation_params)
        @invitation.invsessions.build
  end


   def invitation_params
      params.require(:invitation).permit(:user_id, :guest_id, :event_id, :start, :title, :type_of_event,:memo, :seen, :deleted, :modified, invsessions_attributes: Invsession.attribute_names.map(&:to_sym).push(:_destroy))
    end

我的邀请模式：

class Invitation < ApplicationRecord    
  belongs_to :user
  has_many :invsessions, dependent: :destroy
  accepts_nested_attributes_for :invsessions, allow_destroy: true      
end

和我的入侵模型：

class Invsession < ApplicationRecord
  belongs_to :invitation, optional: true
  belongs_to :user
end

显示效果很好，但是当我单击“保存”时，它仅保存新邀请，而不保存新的邀请项。我有以下内容：

Processing by InvitationsController#create as JS
  Parameters: {"utf8"=>"✓", "invitation"=>{"guest_id"=>["", "1"], "type_of_event"=>"2", "event_id"=>"108", "title"=>"ssss", "memo"=>"ssss", "invsession"=>{"_destroy"=>"", "start"=>"2018-11-02 04:15 am +08:00", "end"=>"2018-11-02 04:15 am +08:00"}}, "commit"=>"Create Invitation", "locale"=>"en-us"}
  User Load (0.6ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT ?  [["id", 1], ["LIMIT", 1]]
Unpermitted parameters: :guest_id, :invsession
1
   (0.1ms)  begin transaction
  SQL (23.0ms)  INSERT INTO "invitations" ("user_id", "guest_id", "event_id", "title", "memo", "created_at", "updated_at", "type_of_event") VALUES (?, ?, ?, ?, ?, ?, ?, ?)  [["user_id", 1], ["guest_id", 1], ["event_id", 108], ["title", "ssss"], ["memo", "ssss"], ["created_at", "2018-11-02 08:15:37.916159"], ["updated_at", "2018-11-02 08:15:37.916159"], ["type_of_event", 2]]
   (25.6ms)  commit transaction
   (0.1ms)  begin transaction

在这一行中，我不知道如何解决Unpermitted parameters: :guest_id, :invsession

是否需要进行一些修改才能使其正常工作？我正在跟踪关于红宝石（070）的教程，该教程似乎很简单。

Answer 1

这里的问题是，表单没有为嵌套的表单上的输入创建正确的名称。

您在这里有不同的选择，请记住您使用的是simple_form创建输入，因此，请使用simple_form中的帮助器创建输入，它将自动神奇地创建正确的名称

?php
$date1 = date_create("2017-04-15");
$date2 = date_create("2017-05-18");

//difference between two dates
$diff = date_diff($date1,$date2);

//count days
echo 'Days Count - '.$diff->format("%a");
?

为此，您当然需要配置simple_form以使其适合您要输入的结构。

或者在其他情况下，如果您只想让这样的事情出现，请像这样手动设置输入的名称。

<%= f.input :start, input_html: { class: 'form-control' } %>

这将为表单上的参数创建所需的结构，并将其放入<%= f.text_field :start, :class => "form-control", name: 'invitation[invsession_attributes][start]' %>内，因为这是您在允许的params方法上使用的结构。

Answer 2

您的invitation_params必须看起来像这样。据此，它将接受guest_id和invsessions_attributes作为Array。

def invitation_params
  params.require(:invitation).permit(:user_id, guest_id:[], :type_of_event, :event_id, :title, :memo, :seen, :deleted, :modified, invsessions_attributes: %i[_destroy start end])
end

您正在使用具有nested_attributes关系的has_many，因此这些属性也将作为数组接收。

#update 2

你可以试试这个吗

def invitation_params
  params.require(:invitation).permit(:user_id, guest_id:[], :type_of_event, :event_id, :title, :memo, :seen, :deleted, :modified, :invsessions_attributes => [:_destroy, :start, :end])
end

#update 3

def invitation_params
 params.require(:invitation).permit(:user_id, :type_of_event, :event_id, :title, :memo, :seen, :deleted, :modified, guest_id:[], :invsessions_attributes => [:_destroy, :start, :end])
end

在guest_id:[]之前放入invsessions_attributes。

希望这会对您有所帮助。

Rails嵌套形式的“不允许的参数：”

2 个答案: