[英]Rendering partial collection with Ajax
我認為我的javascript工作正常,但現在無法加載內容。 只是一個空白。 我目前在我的create.js.erb中
$('#pit_form').remove(); //remove form
$('#new_link').show(); //show new link again
$('#pit_index').append("<%= j (render :partial => 'pits/pit', :collection => @pits) %>")
我也在pits_controller的create動作中添加了@pits。
調節器
class PitsController < ApplicationController
before_action :current_user, only: [:create, :destroy]
before_action :correct_user, only: :destroy
def new
@pit = Pit.new
end
def index
@pit = Pit.all
@user = User.find_by(params[:id])
@pits = Pit.paginate(:page => params[:page]).order('created_at DESC').group_by { |pit| pit.created_at.strftime("%B %Y") }
end
def create
@pit = current_user.pits.create(pit_params)
@pits = Pit.paginate(:page => params[:page]).order('created_at DESC').group_by { |pit| pit.created_at.strftime("%B %Y") }
respond_to do |format|
format.html { redirect_to @pit}
format.js
end
end
def show
@pit = Pit.find(params[:id])
end
def edit
end
def update
@pit = Pit.find(pit_params[:id])
if @pit.update_attributes(pit_params)
redirect_to @pit
end
end
def destroy
@pit = Pit.find(params[:id])
@pit.destroy
end
def upvote
@pit = Pit.find(params[:pit_id])
@pit.upvote_from current_user
redirect_to pit_path(@pit)
end
def downvote
@pit = Pit.find(params[:pit_id])
@pit.downvote_from current_user
redirect_to pit_path(@pit)
end
private
def correct_user
@pit = current_user.pits.find_by_id(params[:id])
redirect_to root_path if @pit.nil?
end
def pit_params
params.require(:pit).permit(:topic, :summary, :image, :video_url, :author, :user_id)
end
end
我的日志說它正在加載內容,但除了空白外什么都沒有顯示。
日志
Started POST "/pits" for 127.0.0.1 at 2014-09-03 13:43:20 -0500
Processing by PitsController#create as JS
Parameters: {"utf8"=>"✓", "pit"=>{"topic"=>"test", "author"=>"test", "summary"=>"test", "video_url"=>""}, "commit"=>"Start Pit"}
User Load (0.4ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1
(0.1ms) begin transaction
SQL (0.4ms) INSERT INTO "pits" ("author", "created_at", "summary", "topic", "updated_at", "user_id", "video_url") VALUES (?, ?, ?, ?, ?, ?, ?) [["author", "test"], ["created_at", "2014-09-03 18:43:20.845193"], ["summary", "test"], ["topic", "test"], ["updated_at", "2014-09-03 18:43:20.845193"], ["user_id", 1], ["video_url", ""]]
(1.2ms) commit transaction
Pit Load (0.3ms) SELECT "pits".* FROM "pits" ORDER BY created_at DESC LIMIT 30 OFFSET 0
Rendered pits/_pit.html.erb (0.0ms)
Rendered pits/create.js.erb (2.2ms)
Completed 200 OK in 23ms (Views: 5.8ms | ActiveRecord: 2.3ms)
根據我的搜索,似乎在@create動作中添加@pits可以解決其他問題,但不是我的。 希望有所幫助。
我的index.html.erb
<div class = "container list-pits", id = "pit_index">
<%= link_to "Add New Pit", new_pit_path, id: "new_link", remote: true, class: "btn btn-default" %>
<br>
<br>
<% @pit.each do |pit| %>
<div class = "container">
<div class = "well">
<h3 id="pit-title"><%= link_to pit.topic, pit_path(pit) %></h3>
<p>by <%= link_to pit.author, '#' %></p>
<br>
<p><%= pit.summary %></p>
<p>Replies (<%= pit.comments.count %>)</p>
<br>
<p>Pit Created by: <%= link_to pit.user.name, pit.user %> on <%= pit.created_at %></p>
<%= link_to "View Pit", pit_path(pit), class: "btn btn-primary" %>
<%= link_to "Delete Pit", pit_path(pit), remote: true, method: :delete, data: { confirm: 'Are you sure?' } %>
</div>
</div>
<% end %>
</div>
_pit.html.erb
<
div class = "container list-pits", id = "pit_index">
<%= link_to "Add New Pit", new_pit_path, id: "new_link", remote: true, class: "btn btn-default" %>
<br>
<br>
<% @pit.each do |pit| %>
<div class = "container">
<div class = "well">
<h3 id="pit-title"><%= link_to pit.topic, pit_path(pit) %></h3>
<p>by <%= link_to pit.author, '#' %></p>
<br>
<p><%= pit.summary %></p>
<p>Replies (<%= pit.comments.count %>)</p>
<br>
<p>Pit Created by: <%= link_to pit.user.name, pit.user %> on <%= pit.created_at %></p>
<%= link_to "View Pit", pit_path(pit), class: "btn btn-primary" %>
<%= link_to "Delete Pit", pit_path(pit), remote: true, method: :delete, data: { confirm: 'Are you sure?' } %>
</div>
</div>
<% end %>
</div>
我根據一些建議在_pit部分中拋出了相同的內容。 謝謝。
采集
為了給你一些進一步的范圍內, collection
了的說法partial
幫手基本上取代了.each
你的方面partial
。 重要的一點是,您需要使用as:
參數記錄要調用的本地對象:
要在部分中使用自定義局部變量名稱,請在對部分的調用中指定:as選項:
<%= render partial: "product", collection: @products, as: :item %>
進行此更改后,您可以將@products集合的實例作為局部中的item局部變量進行訪問。
這意味着,如果要使用collection
渲染局部變量,則需要確保它具有與as:
方法相鄰的方法,以便為您提供正確的局部變量名稱。 此外,正如Ruby Racer
在他的回答中概述的那樣,您應該只將collection
參數用於數據收集 :
#app/views/pits/create.js.erb
$('#pit_index').append("<%= j (render :partial => 'pits/pit', collection: @pits, as: :pit) %>")
這將加載pit
部分就好像你叫@pits.each do |pit|
,這意味着您將可以使用以下內容:
#app/views/pits/_pit.html.erb
<div class = "container list-pits", id = "pit_index">
<div class = "container">
<div class = "well">
<h3 id="pit-title"><%= link_to pit.topic, pit_path(pit) %></h3>
<p>by <%= link_to pit.author, '#' %></p>
<br>
<p><%= pit.summary %></p>
<p>Replies (<%= pit.comments.count %>)</p>
<br>
<p>Pit Created by: <%= link_to pit.user.name, pit.user %> on <%= pit.created_at %></p>
<%= link_to "View Pit", pit_path(pit), class: "btn btn-primary" %>
<%= link_to "Delete Pit", pit_path(pit), remote: true, method: :delete, data: { confirm: 'Are you sure?' } %>
</div>
</div>
</div>
固定
您有幾個問題(我已經在上面解決了),即您在部分代碼中使用了@pit
。
@pit
是一個實例變量,這意味着只能在控制器中設置。 如果使用局部 @instance
調用局部變量,它們的作用域與@instance
vars明顯不同。
查看您的日志,似乎您的partial
已被調用,但是您使用@pit.each
可能僅會引起空白。 我的建議解決了這個問題
您正在使用
render :partial => 'pits/pit', :collection => @pits
如果您熟悉該文檔,則應該知道這意味着您將使用局部對象,該局部對象將為該集合中的每個對象呈現一個對象,而不是一個集合。
通用(不是來自您的代碼)部分是:
_pit.html.erb:
name: <%= pit.name %>
surname: <%= pit.surname %>
<%# etcetera %>
現在,如果要使用包含集合的局部,則應該更改局部和對其的調用。
更改部分:
將每個@pits
(或@pit
,更改為粘貼)更改為pits
更改調用方式(發送局部變量):
render :partial => 'pits/pit', locals: {pits: @pits}
這應該可以解決問題。
更新:
更改此:
<% @pit.each do |pit| %>
對此:
<% pits.each do |pit| %>
和這個:
$('#pit_index').append("<%= j (render :partial => 'pits/pit', :collection => @pits) %>")
對此:
$('#pit_index').append("<%= j (render :partial => 'pits/pit', locals: {pits: @pits}) %>")
更新您的@pits是數組的哈希(已使用group_by {})。 因此,您可能應該這樣更改部分內容:
<% pits.each do |current_value, pitarrray| %>
<%# maybe do some grouping actions here %>
<% pitarray.each do |pit| %>
別忘了,循環<% end %>
時會有兩個<% end %>
。
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