Question

我的django项目遇到此错误。我的应用程序称为“分数提交” 基本上我在网站上有一个功能，允许用户下载报告。因此，在我的views.py文件中，我具有报告功能并导入report.py文件，其中显示了报告的生成方式
它显示了以下代码行中发生的错误：

 submission=Submission.objects.get(month=month,year=reportyear,program=program)

Views.py

def report(request):    

    from scoresubmission.report import reportA, reportB, reportC
    reportType = request.POST["reportType"]
    reportYear = int(request.POST["reportYear"])

    if reportType == 'a':
        report_content = reportA(reportYear)
        response = HttpResponse(report_content, content_type="text/csv")
        response['Content-Disposition'] = 'inline; filename=5SAuditYearlySummaryReport_%d.xlsx' %reportYear

report.py，其中包含相关代码用于设施中的设施： worksheet.write（row，col，facility.name，facility_format）

    for i in range(12): # 12 months
        month=i+1
        programs=Program.objects.filter(facility_id=facility.id)
        avg_totalscore=0
        count=1
        for program in programs:
            print(program)
            try:

                submission=Submission.objects.get(month=month,year=reportyear,program=program)
                print(submission)
                avg_score=Result.objects.filter(submission=submission).aggregate(Avg('NewScore'))
                #print avg_score.get('NewScore__avg')
                avg_totalscore=(avg_totalscore + avg_score.get('NewScore__avg'))/count
                count=count+1
            except submission.DoesNotExist:
                pass

                #print avg_totalscore
        if avg_totalscore!=0:
            worksheet.write(row,i+3,avg_totalscore,red_format)
        else:
            worksheet.write(row,i+3,'-',red_format)

回溯（最近通话最近）：文件“ C：\ Users \ CHLOZHAO \ AppData \ Local \ Programs \ Python \ Python37 \ lib \ site-packages \ django \ core \ handlers \ exception.py”，第34行，位于内部响应= get_response（请求）文件“ C：\ Users \ CHLOZHAO \ AppData \ Local \ Programs \ Python \ Python37 \ lib \ site-packages \ django \ core \ handlers \ base.py”，行115，_get_response 响应= self.process_exception_by_middleware（e，请求）文件“ C：\ Users \ CHLOZHAO \ AppData \ Local \ Programs \ Python \ Python37 \ lib \ site-packages \ django \ core \ handlers \ base.py”，行_get_response中的113 响应= wraped_callback（请求，* callback_args，** callback_kwargs） _wrapped_view中的文件“ C：\ Users \ CHLOZHAO \ AppData \ Local \ Programs \ Python \ Python37 \ lib \ site-packages \ django \ contrib \ auth \ decorators.py”，第21行返回view_func（request，* args，** kwargs）报告中的文件“ C：\ D Drive \ 5S Audit Website \ my5saudit \ scoresubmission \ views.py”，行185 report_content = reportA（reportYear）在reportA中的文件“ C：\ D Drive \ 5S Audit Website \ my5saudit \ scoresubmission \ report.py”，行79 除了submit.DoesNotExist： UnboundLocalError：分配前已引用本地变量“提交”

Answer 1

在您的except中，您需要引用 class Submission， not 对象，因为它本身不是当时存在：

try:
    submission=Submission.objects.get(month=month,year=reportyear,program=program)
    print(submission)
    avg_score=Result.objects.filter(submission=submission).aggregate(Avg('NewScore'))
    #print avg_score.get('NewScore__avg')
    avg_totalscore=(avg_totalscore + avg_score.get('NewScore__avg'))/count
    count=count+1
except Submission.DoesNotExist:  # reference to the class, not the object
    pass

如果Sibmission.objects.get(..)失败，则不会分配submission变量，因此submission.DoesNotExist毫无意义。

您应该从不使用该对象，并始终使用模型类本身来引用DoesNotExist异常类。

分配前引用的本地变量“提交”

1 个答案: