如何在ReportLab中引用Django模型

Question

我正在使用ReportLab创建一个PDF，我想从订单模型中汲取单个字段(该字段称为'remote'(。我目前正在使用orders.objects.all((，但是我不确定如何参考模型的特定字段。

我目前拥有的：

def write_pdf_view(request):
    doc = SimpleDocTemplate("/tmp/somefilename.pdf")
    styles = getSampleStyleSheet()
    Story = [Spacer(1,2*inch)]
    style = styles["Normal"]
    orders = Orders.objects.all()
    for i in orders:
       bogustext = ("This is Order number %s.  " %i)
       p = Paragraph(bogustext, style)
       Story.append(p)
       Story.append(Spacer(1,0.2*inch))
    doc.build(Story)
    fs = FileSystemStorage("/tmp")
    with fs.open("somefilename.pdf") as pdf:
        response = HttpResponse(pdf, content_type='application/pdf')
        response['Content-Disposition'] = 'attachment; filename="somefilename.pdf"'
        return response
    return response

这将返回带有文本"这是订单号订单对象"的PDF，但我希望它读为"这是订单号参考" "

Answer 1

我认为您可以像这样

访问它

bogustext = ("This is Order number %s.  " % i.reference)

Answer 2

在您的型号

class Order(db.Model):
    ...
    def __str__(self):
        return self.reference