我通过 :collection 选项将集合(@feed_items)传递给 _feed_item 部分。在_feed_item部分内,我想渲染另一个部分_like_button。在_like_button部分中,我希望能够访问集合的特定成员。我应该从_feed_item部分传递什么到_like_button部分?
@feed_items = current_user.user_feed.order("id DESC").limit(5)
_feed.html.erb
<%= render partial: 'shared/feed_item', collection: @feed_items %>
_feed_item.html.erb
<%= render 'likes/like_button', ????? %>
_like_button.html.erb
<% if like = current_user.likes.find_by_feed_id(feed_item.id) %>
编辑
根据以下答案传递局部变量有效:
<%= render :partial => 'likes/like_button', :locals =>{:feed_item => feed_item} %>
ActionView::Template::Error (undefined local variable or method 'feed_item'
但是,在提交 like 之后,当它尝试通过 ajax 再次呈现表单时,我得到了一个。如何通过 ajax 调用再次传递局部变量?
控制器
class LikesController < ApplicationController
def create
@like = Like.create(params[:like])
@feed = @like.feed
render :toggle
end
def destroy
like = Like.find(params[:id]).destroy
@feed = like.feed
render :toggle
end
end
切换.js.erb
$("#like").html("<%= escape_javascript render('like_button') %>");
_like_button.html.erb
<% if like = current_user.likes.find_by_feed_id(feed_item.id) %>
<%= form_for like, :html => { :method => :delete }, :remote => true do |f| %>
<%= f.submit "Unlike" %>
<% end %>
<% else %>
<%= form_for current_user.likes.build(:feed_id => feed_item.id), :remote => true do |f| %>
<%= f.hidden_field :feed_id %>
<%= f.hidden_field :user_id %>
<%= f.submit "Like" %>
<% end %>
<% end %>
_feed_item.html.erb
<div id="like">
<%= render :partial => 'likes/like_button', :locals =>{:feed_item => feed_item} %>
</div>