Rails还是比较新的。我使用acts_as_votable gem来创建upvote和upvote按钮以允许用户上调/下调笑话,但是我不能让它们从upvote / downvote改变(反之亦然)并且每次他们点击时更新计数器而不刷新页面。没有运气,我尝试了其他类似的答案。这是我试图实现的。
笑话模型
acts_as_votable
用户模型
acts_as voter
Routes.rb是
resources :jokes do
member do
get "like" => "jokes#upvote"
get "unlike" => "jokes#downvote"
end
end
笑话控制器
#upvote from user
def upvote
@joke = Joke.find(params[:id])
@joke.upvote_from current_user
respond_to do |format|
format.html { redirect_to :back }
format.js { render :layout => false }
end
end
#downvote from user
def downvote
@joke = Joke.find(params[:id])
@joke.downvote_from current_user
respond_to do |format|
format.html { redirect_to :back }
format.js { render :layout => false }
end
end
我的观点:
<div class="votes">
<%= link_to like_joke_path(@joke), method: :get, remote: true, class: 'like_joke' do %>
<button type="button" class="btn btn-info" aria-label="Left Align">
<i class="fa fa-arrow-up"></i>
<span class="badge vote_count"><%= @joke.get_upvotes.size %></span>
</button>
<% end %>
<%= link_to unlike_joke_path(@joke), method: :get, remote: true, class: 'unlike_joke' do %>
<button type="button" class="btn btn-info" aria-label="Left Align">
<i class="fa fa-arrow-down"></i>
<span class="badge voute_count"><%= @joke.get_downvotes.size %></span>
</button>
<% end %>
</div>
like.js.erb:
$('.like_joke').bind('ajax:success', function(){
$(this).parent().parent().find('.vote_count').html('<%= escape_javascript @joke.votes_for.size.to_s %>');
$(this).closest('.like_joke').hide();
$(this).closest('.votes').html(' <%= link_to "Unlike", unlike_joke_path(@joke), remote: true, method: :get, class: 'unlike_joke' %>');
});
最后不像.js.erb:
$('.unlike_joke').bind('ajax:success', function(){
$(this).parent().parent().find('.vote_count').html('<%= escape_javascript @joke.votes_for.size.to_s %>');
$(this).closest('.unlike_joke').hide();
$(this).closest('.votes').html(' <%= link_to "Like", like_joke_path(@joke), remote: true, method: :get, class: 'like_joke' %>');
});
这是呈现的HTML:
<div class="votes">
<a class="like_joke" data-remote="true" data-method="get" href="/jokes/11-cat-joke-title/like">
<button type="button" class="btn btn-info" aria-label="Left Align">
<i class="fa fa-arrow-up"></i>
<span class="badge vote_count">0</span>
</button>
</a>
<a class="unlike_joke" data-remote="true" data-method="get" href="/jokes/11-cat-joke-title/unlike">
<button type="button" class="btn btn-info" aria-label="Left Align">
<i class="fa fa-arrow-down"></i>
<span class="badge voute_count">1</span>
</button>
</a></div>
当我查看js控制台时,我在jquery.js得到内部服务器错误?body = 1:9665这是xhr.send((options.hasContent&amp;&amp; options.data)|| null);
好像我很接近,但我认为我的观点和js搞砸了。有人能告诉我我缺少的东西吗?
答案 0 :(得分:1)
如果你看一下你提供的代码......代码就是字符串内部和外部的颜色......你会注意到这一行:
$(this).closest('.votes').html(' <%= link_to "Unlike", unlike_joke_path(@joke), remote: true, method: :get, class: 'unlike_joke' %>');
变色,这样部分代码就在字符串中......但是部分不是(向右滚动看到它,它接近结尾)。
我不确定这是您的错误,但您可能应该考虑将其更改为:
$(this).closest('.votes').html(' <%= link_to "Unlike", unlike_joke_path(@joke), remote: true, method: :get, class: "unlike_joke" %>');
如果只是为了消除歧义。 (还检查其他类似问题)
好的,我认为问题在于此。 一旦你点击了...你就会去喜欢的行动(顺便说一句,你应该称之为'喜欢'而不是'upvote'以保持一致性)&gt; 然后你渲染like.js。
此时你想让js实际更新like-count等。 你已经拥有了javascript,而你只想立即运行它。 你不需要将它绑定到ajax成功......你已经成功了。所以你的like.js应该只包含裸javascript来实际更新屏幕,例如:
var like_joke = $('.unlike_joke');
like_joke.parent().parent().find('.vote_count').html('<%= escape_javascript @joke.votes_for.size.to_s %>');
like_joke.closest('.like_joke').hide();
like_joke.closest('.votes').html(' <%= link_to "Unlike", unlike_joke_path(@joke), remote: true, method: :get, class: 'unlike_joke' %>');
注意:未经测试且可能存在错误,但您明白了。唐;不要把一个可以调用ajax成功的函数,或者它会坐在那里等待其他一些成功发生。成功已经发生了......现在就去做那件事:)
另请注意:这里有一个错字:
<span class="badge voute_count"><%= @joke.get_downvotes.size %></span>
应该是
<span class="badge vote_count"><%= @joke.get_downvotes.size %></span>
答案 1 :(得分:0)
更好的方式......
#config/routes.rb
resources :jokes do
match :vote, via: [:post, :delete], on: :member
end
#app/controllers/jokes_controller.rb
class JokesController < ApplicationController
def vote
@joke = Joke.find(params[:id])
if request.post?
@joke.upvote_from current_user
elsif request.delete?
@joke.downvote_from current_user
end
respond_to do |format|
format.html { redirect_to :back }
format.js
end
end
end
制作一个partial
视图:
#app/views/jokes/_vote.html.erb
<% voted = current_user.voted_for? joke %>
<% styling = voted ? "" : "un" %>
<% arrow = voted ? "up" : "down" %>
<% method = voted ? :delete : :post %>
<%= link_to vote_joke_path(joke), method: method, remote: true, class: '#{styling}like_joke', id: joke.id do %>
<button type="button" class="btn btn-info" aria-label="Left Align">
<i class="fa fa-arrow-<%= arrow %>"></i>
<span class="badge vote_count"><%= joke.get_upvotes.size %></span>
</button>
<% end %>
#app/views/jokes/show.html.erb
<%= render partial: "vote", locals: { joke: @joke } %>
这样,当您从vote.js.erb
调用JokesController
时,您就可以使用以下内容:
#app/views/jokes/vote.js.erb
$("<%=j @joke.id %>").html("<%=j render partial: "jokes/vote", locals: { joke: @joke } %>");