Ajax提交后如何使输入字段为空？

Question

我对我的应用程序实施了聊天系统 。
提交新评论后，它会部分刷新评论列表。
因此，新添加的评论会弹出，而无需重新加载整个页面。

它工作正常，但问题是，提交:(之后，它不会使输入字段为空（初始化）。

如果提交成功，如何将其清空？
5秒钟自动刷新将是另一个阻止问题。 所以我也必须关心它。

并且如果可能的话，当用户尝试在10秒内提交评论时，我想弹出Flash提示“您不能发送垃圾邮件”。
假设我想从Users＃show页面提交评论

views / users / show.html.erb

<%= javascript_tag do %>
    jQuery(document).ready(function () {
        refreshPartial();
        setInterval(refreshPartial, 5000)
    });


    function refreshPartial() {
      $.ajax({
        url: "<%= show_user_path(@user) %>/refresh_part",
        type: "GET",
        dataType: "script",
      });
    }
<% end %>
......
<span id="chat">
<%= render 'users/comment' %>
</span>
<%= render 'users/comment_input' %>

views / users / _comment.html.erb

<table>
  <tr>
    <th>ID</th>
    <th>PIC</th>
    <th>Body</th>
    <th>Subject</th>
    <th>Posted by</th>
    <th>Delete</th>
  </tr>

<% @comments.each do |comment| %>
  <tr id="<%= dom_id(comment) %>">
    <td><%= comment.id %></td>
    <td>
            <% if comment.comment_icon? %>
                <ul class="thumbnails">
                <%= image_tag(comment.comment_icon.url(:thumb),:height => 100, :width => 100, :style => 'border:3px double #545565;' ) %>
                </ul>
            <% end %>

    </td>
    <td><%= comment.body %></td>
    <td><%= comment.subject %></td>
    <td><%= comment.user.user_profile.nickname if comment.user.user_profile %></td>
    <td>
    <%= button_to 'destroy', polymorphic_path([@user, comment]), :data => {:confirm => 'Are you sure?'}, :method => :delete, :disable_with => 'deleting...', :remote => true, :class => 'btn btn-danger' if current_user && current_user.id == comment.user_id %>
    </td>
    </tr>
<% end %>
</table>

<%= paginate @comments, :window => 4, :outer_window => 5, :left => 2, :right => 2 %>

views / users / _comment_input.html.erb <=这是输入表格！

<%=form_for(([@user, @comment]), :remote => true) do |f| %>
    <div class="field">
      <%= f.label :body %><br />
      <%= f.text_field :body %>
    </div>
    <div class="field">
    <%= f.file_field :comment_icon %>
    </div>
  <div class="actions">
    <%= f.submit %>
  </div>

<% end %>

comments_controller.rb

def create
  commentable = @community_topic||@community||@user
  @comments = commentable.comment_threads.order("updated_at DESC").page(params[:page]).per(5)
  @comment = Comment.build_from(commentable, current_user.try(:id), params[:comment][:body]) 
  @comment.comment_icon = params[:comment][:comment_icon] 


  if @user
    @following_users = @user.all_following(order: 'updated_at DESC') 
    @followed_users = @user.followers 
    @communities_user = @user.get_up_voted(Community).order("updated_at ASC").page(params[:page]).per(5)
  elsif @community      

  end

  last_comment = Comment.where(:user_id => current_user.id).order("updated_at").last

  if last_comment && (Time.now - last_comment.updated_at) <= 10.second  
    flash[:notice] = "You cannot spam!" 
    render :template => template_for(commentable)
  elsif @comment.save 
    #if  @community_topic.empty?
        @comments = commentable.comment_threads.order("updated_at DESC").page(params[:page]).per(5)
        @comment = commentable.comment_threads.build

        respond_to do |format|
            format.html { redirect_to [@community, commentable].uniq, :notice => "comment added!"  }
            format.js do
                if @community.present?
                  render 'communities/refresh_part' 
                elsif @community_topic.present?
                  render 'community_topics/refresh_part'
                elsif @user.present?
                  render 'users/refresh_part'
                end
            end
        end 
  else
    render :template => template_for(commentable)
  end
end

视图/用户/refresh_part.js.erb

$('#chat').html("<%= j(render(:partial => 'users/comment')) %>")

Answer 1

好吧，我认为这是您想清空的“正文”输入，因此，基本上，只需像这样添加一个id即可：

<%= f.text_field :body, :id => "body_input" %>

在您的views / users / refresh_part.js.erb中 ，您可以添加以下内容：

$('#body_input').val('');

这仅在成功提交后才有效，因为从我所看到的情况来看，仅在保存注释时才呈现模板。