使用虾和Prawnto for Rails PDF 生成

发布于 2024-08-15 02:57:12 字数 1368 浏览 7 评论 0原文

这可能更多是一个设计或使用问题，但主要问题是将 Prawn 插件与 Rails 2.3.4 一起使用并访问生成的 PDF 对象以将其渲染到文件中。

场景基本上是；

带有 respond_to 块的控制器设置了
一个视图，其中包含用于将文本、图形等渲染为 PDF 的代码，

它看起来像：
从客户控制器

def show    
    @customer = Customer.find(params[:id])  

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @customer }
      format.pdf  { render :layout => false  }
end

从客户视图

  pdf.text "Hello World"  
  pdf.text "Customer is #{@customer.name}"

这工作正常，生成响应 /customers/1.pdf 的 PDF 文件，正如生成 PDF 文件所预期的那样。

其他要求之一是将 pdf 呈现为文件并在服务器上存储副本。大虾提供方法： pdf.render_file {path_tofile}

所以现在，如果我将其包含在视图代码中，我当然可以将文件保存在服务器上。但我想在控制器中管理它，因为它与逻辑相关，而不是视图本身。

第一次尝试是：

def show    
   @customer = Customer.find(params[:id])
   @pdf = Prawn::Document.new()  

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @customer }
      format.pdf  { render :layout => false  }
      pdf.render_file {path_to_file}
end

从客户角度来看

  pdf.text "Hello World"  
  pdf.text "Customer is #{@customer.name}"

问题此尝试的问题是 PDF 未呈现。我怀疑 Controller 实例变量与 Prawnto Plugin pdf 变量发生冲突。但即使更改 PDF 变量也不起作用。有什么建议吗？

原文

This is probably more a design or usage question but the main issue is using the Prawn plugin with Rails 2.3.4 and accessing the resulting PDF object to render it to a file.

The scenario is basically;

a controller with the respond_to block setup
a view with code for rendering the text, graphics etc to PDF

It looks like:
From Customer Controller

def show    
    @customer = Customer.find(params[:id])  

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @customer }
      format.pdf  { render :layout => false  }
end

From Customer View

  pdf.text "Hello World"  
  pdf.text "Customer is #{@customer.name}"

This works fine, producing a PDF file in response to /customers/1.pdf, as expected with a PDF file being generated.

One of the other requirements is to render the pdf to a file and store a copy on the server. Prawn provides the method:
pdf.render_file {path_tofile}

So now if I include this in the View code I can of course save the file on the server. But I'd like to manage this in the controller, as it's related to logic, not view per se.

The first attempt was :

def show    
   @customer = Customer.find(params[:id])
   @pdf = Prawn::Document.new()  

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @customer }
      format.pdf  { render :layout => false  }
      pdf.render_file {path_to_file}
end

From Customer View

  pdf.text "Hello World"  
  pdf.text "Customer is #{@customer.name}"

PROBLEM
The problem with this attempt is that the PDF is not rendered. I suspected the Controller instance variable is clashing with the Prawnto Plugin pdf variable. But even changing the PDF variable didn't work.
Any suggestions ?

分享到QQ

分享到微博