因此,我试图开发一个应用程序,让您将产品转换为带有QR码的标签。使用gem PDFKit和wkhtmltopdf它在本地工作正常。但是在Heroku上它产生了一个HTTP 406和以下rails错误:ActionController::UnknownFormat (OrderController#print is missing a template for this request format and variant. request.formats: ["application/pdf"] request.variants: [])
。我搜索了论坛,但似乎找不到任何遇到同样问题的人。我也按照PDFKit github上的指南进行了heroku使用,link to guide。意思是我有wkhtmltopdf-binary gem和wkhtmltopdf-heroku gem。
相关代码片段:
#in app/views/order/show.html.erb
<%= link_to "Print QR-code", print_order_path(@order, :format => :pdf), class 'btn btn-primary' %>
#in app/config/initializers/pdfkit.rb
PDFKit.configure do |config|
if File.executable? 'app/.apt/usr/local/bin/wkhtmltopdf'
config.wkhtmltopdf = 'app/.apt/usr/local/bin/wkhtmltopdf'
end
#app/controllers/order_controller
def print
@order = Order.find(params[:id])
end
#app/views/order/print.html.erb
<div style="display: inline-block">
<table class="QR" style="width:100%">
<tr style="margin:30px">
<td class="QR">
<% @qr = RQRCode::QRCode.new(@order.qr_code.to_s, :size => 6)%>
<%= raw @qr.as_svg(offset:0, color: '000',shape_rendering: 'crispEdges', module_size:4) %>
</td>
<td style="font-size:50px;padding:20px; text-align:center">
<%[email protected]_s%><br>
<%[email protected]_s%>
</td>
</tr>
</table>
</div>
在使用srng提供的respond_to添加块后,我现在收到以下错误:
ActionView::MissingTemplate(Missing template order/print, application/print with {:locale =>[:sv], :formats =>[:pdf], :variants => [], :handlers => [:raw, :erb, :html, :builder, :ruby, :coffee, :jbuilder]}
你错过了我认为的格式块。这就是它正在寻找的东西。
您需要在Order.rb #print方法中添加一个块;
// order_controller.rb
def print
@order = Order.find(params[:id])
respond_to do |format|
# format.html
format.pdf do
send_data PDFKit.new( render_to_string 'print', order: @order ).to_pdf
end
end
end
编辑:神圣哇,这很有趣。
1-将名为print.pdf.erb的文件添加到views / order文件夹中2-内容与print.html.erb相同2-使用上面的格式块,我已将html格式注释为不必要的
编辑2:看到它在本地和Heroku上工作,我只是要复制/粘贴所有代码,以便直接比较。我没有qr类,我的属性不同,但你可以得到这个想法。
//orders_controller.rb
def print
@order = Order.find(params[:order_id])
respond_to do |format|
format.html
format.pdf do
send_data PDFKit.new( render_to_string 'print', order: @order ).to_pdf
end
end
end
# GET /orders
# GET /orders.json
def index
@orders = Order.all
end
# GET /orders/1
# GET /orders/1.json
def show
end
....
//views/orders/show.html.erb
<p id="notice"><%= notice %></p>
<p>
<strong>Name:</strong>
<%= @order.name %>
</p>
<p>
<strong>Thing:</strong>
<%= @order.thing %>
</p>
<%= link_to 'Print', order_print_path(@order, :format => :pdf) %> |
<%= link_to 'Edit', edit_order_path(@order) %> |
<%= link_to 'Back', orders_path %>
//views/order/print.html.erb
<div style="display: inline-block">
<table class="QR" style="width:100%">
<tr style="margin:30px">
<td class="QR">
</td>
<td style="font-size:50px;padding:20px; text-align:center">
<%[email protected]%><br>
<%[email protected]%>
</td>
</tr>
</table>
</div>
//views/orders/print.pdf.erb
<div style="display: inline-block">
<table class="QR" style="width:100%">
<tr style="margin:30px">
<td class="QR">
</td>
<td style="font-size:50px;padding:20px; text-align:center">
<%[email protected]%><br>
<%[email protected]%>
</td>
</tr>
</table>
</div>
//Gemfile
gem 'pdfkit'
gem 'wkhtmltopdf-heroku'
//config/routes.rb
resources :orders do
get 'print', to: 'orders#print'
end