方案
我创建了一个用于学习Rails和Bootstrap的简单应用程序。这个应用程序的功能是允许用户为名人提供昵称,也喜欢昵称。您可以在http://celebnicknames.herokuapp.com
查看我有一个link_to按钮,用于在我的 home / index.html.erb 中为名人发布喜欢的内容:
<%= link_to home_updatelike_path(id: nickname.id, search: @search ), method: :post, remote: true, class: "update_like btn btn-xs btn3d pull-right" do %>
<i class="glyphicon glyphicon-thumbs-up"></i>
<% end %>
我的home_controller.rb中对于post方法的相应代码是:
def updatelike
@like = Like.new(:nickname_id => params[:id], :ip_address => request.remote_ip)
@like.save
respond_to do |format|
format.html { redirect_to root_path("utf8"=>"✓", "search"=>params[:search], "commit"=>"Search") }
format.json { head :no_content }
format.js { render :layout => false }
end
end
updatelike.js.erb 中的代码如下:
$('.update_like').bind('ajax:success', function() {
});
现在,我想要实现的是在不执行页面重新加载的情况下提交类似内容。
问题:
每当我按下按钮时,数据库操作就完成了,但除非我重新加载,否则更改不会反映在页面中。请引导我完成这个noob问题,并提供资源的链接,这些资源解释了使用带有Rails的AJAX。
修改
以下是整个主页/ index.html.erb
<div class="jumbotron col-md-6 col-md-offset-3">
<h1 class='text-center'>Nicknamer</h1>
</div>
<div class="container">
<div class="row">
<div class="col-sm-8 col-sm-offset-2 bottom50">
<%= form_tag(root_path, :method => "get", id: "search-form", type: "search") do %>
<div class = "form-group" >
<div class = "col-sm-9 " >
<%= text_field_tag :search, params[:search], placeholder: "Name", class: "form-control" %>
</div>
<div class = "col-sm-3" >
<%= submit_tag "Search", class: "btn btn-default btn-block btn-success"%>
</div>
</div>
<% end %>
</div>
</div>
<% @names.each do |name| %>
<div class="col-md-6 col-xs-8 col-md-offset-3 col-xs-offset-2 bottom50">
<!-- ===== vCard Navigation ===== -->
<div class="row w">
<div class="col-md-4">
<% if name.sex == true %>
<%= image_tag("mal.jpg", :alt => "", class: "img-responsive") %>
<% else %>
<%= image_tag("fem.jpg", :alt => "", class: "img-responsive") %>
<% end %>
</div><!-- col-md-4 -->
<!-- ===== vCard Content ===== -->
<div class="col-md-8">
<div class="row w1">
<div class="col-xs-10 col-xs-offset-1">
<h3><%= "#{name.name}" %></h3>
<hr>
<h5>Also known as</h5>
<% name.nicknames.each do |nickname| %>
<div class = "row w2 bottom10">
<% if nickname.name_id == name.id %>
<div class="col-xs-7">
<%= nickname.nickname %>
</div>
<div class="col-xs-3 text-right">
<%= pluralize(nickname.likes.count, 'like') %>
</div>
<div class="col-xs-1">
<%= link_to home_updatelike_path(id: nickname.id, search: @search ), method: :post, remote: true, class: "update_like btn btn-xs btn3d pull-right" do %>
<i class="glyphicon glyphicon-thumbs-up"></i>
<% end %>
</div>
<% end %><!-- if -->
</div><!-- row w2 -->
<% end %><!-- do -->
<div class = "row w3 bottom30">
<%= form_for @addnickname, as: :addnickname, url: {action: "addnickname"} do |f| %>
<div class = "form-group" >
<%= f.hidden_field :name_id, :value => name.id %>
<%= f.hidden_field :search, :value => @search %>
<div class = "col-xs-9">
<%= f.text_field :nickname , :required => true, class: "form-control" %>
</div>
<div class = "col-xs-3">
<%= f.submit "Add", class: "btn btn-default btn-info"%>
</div>
</div>
<% end %>
</div>
</div><!-- col-xs-10 -->
</div><!-- row w1 -->
</div><!-- col-md-8 -->
</div><!-- row w -->
</div><!-- col-lg-6 -->
<% end %>
</div><!-- /.container -->
这是整个 home_controller.rb
class HomeController < ApplicationController
def index
@addnickname = Nickname.new
if params[:search]
@search = params[:search]
@names = Name.search(params[:search])
else
@names = Name.all
end
end
def addnickname
@addnickname = Nickname.new(:nickname => params[:addnickname][:nickname], :name_id => params[:addnickname][:name_id])
if @addnickname.save
redirect_to root_path("utf8"=>"✓", "search"=>params[:addnickname][:search], "commit"=>"Search")
else
render :new
end
end
def updatelike
@like = Like.new(:nickname_id => params[:id], :ip_address => request.remote_ip)
@like.save
respond_to do |format|
format.html { redirect_to root_path("utf8"=>"✓", "search"=>params[:search], "commit"=>"Search") }
format.json { head :no_content }
format.js { render :layout => false }
end
end
private
def addnickname_params
params.require(:addnickname).permit(:name_id, :nickname, :search)
end
end
答案 0 :(得分:0)
好的,所以你需要一种方法来识别需要改变的数字的div:
<div class="col-xs-3 text-right">
<%= pluralize(nickname.likes.count, 'like') %>
</div>
最简单的方法是在id
上使用div
属性,该属性对应于昵称的(唯一)数据库ID。 Rails的div_for
为<%= div_for(nickname, class: "col-xs-3 text-right") do %>
<%= pluralize(nickname.likes.count, 'like') %>
<% end %>
。所以你可以将上面的代码更改为:
div
这将生成id
nickname_1
,如$("nickname_#{@like.nickname.id}").html(@like.nickname.likes.count);
(如果昵称的此ID为1)。
现在,在您的javascript模板中,您可以轻松定位需要更新的div:
ajax:success
此处不需要aml:length aml:hasDataType "xs:double" ;
aml:hasValue "35"^^xsd:double ;
rdf:type aml:Attribute ;
schema:name "length" .
绑定,因为您正在渲染javascript模板。在模板中,您可以访问控制器中设置的实例变量 - 就像您可以从HTML模板中一样。上面的代码旨在用新计数替换包含like count的div的内容。