首页 > 解决方案 > Rails AJAX 不渲染部分

问题描述

我有一个表单来创建一个新source的,sources#create上面有一个模式来创建一个新的author. 用户可以创建一个新author的以分配给源,也可以从清单中选择一个现有的。

理想情况下,如果他们确实需要创建新作者,则authors#create表单会以 AJAX 方式创建作者,并且新作者将自动出现在可与源相关联的作者清单中。

以下是作者选择复选框的代码sources#create

  <section id="author" class="white h-100">

    <h2>Author(s)</h2>

    <% if @user_authors.count != 0 %>
      <p class="text-center">Select an author to add below or <a data-toggle="modal" data-target="#newAuthorModal">create a new author</a>.</p>
      <div id="#authorsChecklist"><%= render partial: "authors/checklist", locals: { f: f } %></div>
    <% else %>
      <p class="text-center"><a data-toggle="modal" data-target="#newAuthorModal">Create a New Author</a></p>
    <% end %>

  </section>

以此为authors/_checklist.html.erb部分:

<div class="boxed-scroll">
  <%= f.collection_check_boxes :author_ids, @user_authors.sort_by(&:last_name), :id, :last_first do |b| %>
    <div class="field form-check" style="display: block">
      <%= b.check_box class: "form-check-input" %>
      <%= b.label class: "form-check-label" %>
    </div>
  <% end %>
</div> <!-- boxedscroll -->

这作为创建作者的模态:

<!-- New Author Modal -->
<div class="modal fade" id="newAuthorModal" tabindex="-1" role="dialog" aria-labelledby="newAuthorModalLabel"
  aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="newAuthorModalLabel">Add a New Author</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <%= render partial: "authors/js_form", locals: {author: @new_author} %>
      </div>
    </div>
  </div>
</div>

这是create方法:

  def create
    @author = Author.new(author_params)
    @author.user_id = current_user.id

    respond_to do |format|
      if @author.save
        format.html { redirect_back(fallback_location: author_path(@author)) }
        format.json { render :show, status: :created, location: @author }
        format.js
      else
        format.html { render :new }
        format.json { render json: @author.errors, status: :unprocessable_entity }
      end
    end
  end

这是authors/create.js

  $("#authorsChecklist").html("<%= escape_javascript(render partial: 'authors/checklist', locals: { f: f } ) %>"); 

到目前为止,作者确实成功创建:

Started POST "/authors" for ::1 at 2020-01-31 21:23:26 -0800
Processing by AuthorsController#create as JS
  Parameters: {"utf8"=>"✓", "author"=>{"first_name"=>"Liz", "middle_initials"=>"", "last_name"=>"Bayardelle", "notes"=>""}, "commit"=>"Save Author Info"}
  User Load (1.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2  [["id", 1], ["LIMIT", 1]]
  ↳ app/controllers/application_controller.rb:5
   (0.1ms)  BEGIN
  ↳ app/controllers/authors_controller.rb:32
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2  [["id", 1], ["LIMIT", 1]]
  ↳ app/controllers/authors_controller.rb:32
  Author Create (0.8ms)  INSERT INTO "authors" ("first_name", "middle_initials", "last_name", "notes", "user_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["first_name", "Liz"], ["middle_initials", ""], ["last_name", "Bayardelle"], ["notes", ""], ["user_id", 1], ["created_at", "2020-02-01 05:23:26.279449"], ["updated_at", "2020-02-01 05:23:26.279449"]]
  ↳ app/controllers/authors_controller.rb:32
   (0.4ms)  COMMIT
  ↳ app/controllers/authors_controller.rb:32
  Rendering authors/create.js
  Rendered authors/create.js (0.4ms)
Completed 200 OK in 214ms (Views: 27.8ms | ActiveRecord: 42.7ms)

但是,当您点击提交并且作者没有被添加到复选框列表时,模式不会消失(基本上部分不会刷新)。当您手动点击刷新时,作者会完美显示。

任何人都可以看到如何正确地将其发送到 AJAX 吗?所需的行为是当您点击提交时模式消失,并且清单部分为 AJAX-ically 刷新以便作者出现。

更新

根据评论建议,我将其添加到create.js,这成功地使模态消失,尽管部分没有刷新:

$('#newAuthorModal').modal('hide');

然后我发现这个问题表明我需要更改create.jscreate.js.erb. 这以某种方式阻止了模式消失,但产生了一个服务器错误:

NameError - undefined local variable or method `f' for #<#<Class:0x00007f9e1e0c0ad0>:0x00007f9e18101d38>:
  app/views/authors/create.js.erb:2:in `_app_views_authors_create_js_erb__3387754959944580247_70158492637620'

第二次更新

在查阅 的文档后collection_check_boxesf.之前collection_check_boxes是不必要的。我将其删除并, locals: { f: f }从我的create.js.erb. 模态现在正确关闭并且错误消失了,但我仍然必须点击刷新才能显示名称。

标签: ruby-on-railsajax

解决方案


里面有sources#create个错字:

<div id="#authorsChecklist">

本来应该:

<div id="authorsChecklist">

并且控制器方法需要包含以下定义@user_authors

format.js do
   @user_authors = Author.where(user_id: current_user.id)
end

现在它起作用了!


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