Rails 5 using will_paginate to create a load more button

问题

So I'm trying to create a load more button (not infinite scroll although some simple js tweaks could make it so). I'm using the will_paginate gem in Rails 5.

Its currently all working as expected except when I click load more it loads the next page posts twice e.g: Load more > Post 4, Post 5, Post 6, Post 4, Post 5, Post 6

FYI my 'posts' are @links:

links_controller.erb

def index
  @links = Link.order('created_at DESC').paginate(:page => params[:page], :per_page => 3)
  respond_to do |format|
    format.html
    format.js
  end
end

views/links/index.html.erb

<div class="link-wrap">
  <%= render @links %>
</div>
<% if @links.next_page %>
  <div class="link more">
    <%= link_to 'Load More', links_path(:page => @links.next_page), :class => 'next_page', :remote => true if @links.next_page %>
  </div>
<% end %>

pagination.js.coffee

$ ->
  $('.next_page').on 'click', (e) ->
   e.preventDefault()
   url = $(this).attr('href')
   $.getScript(url)

index.js.erb

$('.link-wrap').append('<%= j render(@links) %>');
<% if @links.next_page %>
  $('.next_page').attr('href','<%= links_path(:page => @links.next_page) %>');
<% else %>
  $('.more').remove();
<% end %>

For the life of me I can't figure out why it would be rendering the links twice when 'load more' is clicked. This seems like a really simple thing but I'm struggling.

回答1:

So it was a stupid error of course.

Remove the line on index.html.erb:

:remote => true if @links.next_page

So now it looks like this:

<div class="link-wrap">
  <%= render @links %>
</div>
<% if @links.next_page %>
  <div class="link more">
  <%= link_to 'Load More', links_path(:page => @links.next_page), :class => 'next_page' %>
  </div>
<% end %>

All works fine now!

回答2:

If you check the server console, you can actually see two requests coming in, one triggered by your :remote => true enabled link and other from your custom ajax. Actually you don't need any js to make this work. Just remove that click function from your pagination.js.coffee or remove :remote => true from the link. After all both are doing the same thing. Hope this will help.

来源：https://stackoverflow.com/questions/48960789/rails-5-using-will-paginate-to-create-a-load-more-button

标签

javascript

ruby-on-rails

ruby-on-rails-5

will-paginate