多重messages.error Django

Question

我希望使用Django消息捕获不正确的信息。我有一个工作正常的message.error，但是当我添加更多的潜在消息时，它们就不能工作了。这是我的代码：

def order_approve(request):
    if request.method == 'POST':
        form = Approved(request.POST or None)
        success = False
        if form.is_valid:    

            order = request.POST.get('order')
            department = request.POST.get('department')
            name = request.POST.get('name')
            notes = request.POST.get('notes')
            check = department
            if check == 'wrong': #I have a column that is '-----' for placeholding
                messages.error(request, 'Please select a valid department')
            else:
                if department == 'sales':
                    approved = PDFStat.objects.filter(quote_num=order).values_list('sales_approved', flat=True)
                    if approved == True:
                        messages.error(requet, order + ' has already been approved by Sales')
                    else:
                        PDFStat.objects.select_related().filter(quote_num=order).update(
                            sales_name = name, sales_approved = True,
                            sales_date=datetime.today())
                        HomeTable.objects.filter(quote_num=order).update(
                            last_app = 'Sales')
                        if notes != '':
                            object1 = PDFStat.objects.select_related().filter(quote_num=order)
                            for a in object1:
                                if a.sales_notes == None:
                                    PDFStat.objects.select_related().filter(quote_num=order).update(
                                        sales_notes = notes)
                                else:
                                    a.sales_notes = a.sales_notes + " " + notes
                                    a.save()
        messages.success(request, 'The quote has successfully been approved by ' + name + ' in ' + department)
        form = Approved()
        success = True
        return render(request, 'approved.html', {'form': form})

    else:
        form = Approved()
    return render(request, 'approved.html', {'form': form})

我的第一个messages.error工作得很好，但是当它转到if approved == True上时，不管它是真是假(在我的数据库中)，它都会移动到or。我做错了什么？所有的对象都在获取正确的数据。

谢谢你的帮助！

Answer 1

approved = PDFStat.objects.filter(quote_num=order).values_list('sales_approved', flat=True)

这将返回一个查询集值，例如[True,]。将其与True进行比较总是会返回False。

也许你想要这样的东西：

pdf_stat = PDFStat.objects.get(quote_num=order)
approved = pdf_stat.sales_approved

注意，如果没有与get()匹配的行或多行，则可能需要额外的代码来处理这种情况。

Answer 2

 messages.error(requet, order + ' has already been approved by Sales').

'requet' should be 'request'。

字符串连接应该是。

messages.error(request, '{0} has already been approved by Sales'.format(order)).