将参数从函数传递给Django中的另一个函数

我在views.py有这两个函数，即： create_excel和section_landpins 。

section_landpins ：

 def section_landpins(request): if request.method == "GET": get_id = request.user.id pnt = ButuanMaps.objects.get(clandpin='162-03-0001-017-33').geom kmdistance = request.GET.get('kmtocity', default=100) mysection = request.GET.get('mysection', default='All') getarea = request.GET.get('getarea', default=5500000) getvalue = request.GET.get('mysoiltype', default=0) getvalue1 = request.GET.get('myerosion', default=0) args = [] kwargs = { 'landproperty__sownerid__id': get_id, 'geom__distance_lte': (pnt, D(km=kmdistance)), 'narea__lte': getarea } if mysection != 'All': kwargs['ssectionid__id'] = mysection if getvalue != '0': args.append(Q(geom__intersects=SoilType.objects.get(id=getvalue).geom)) if getvalue1 != '0': args.append(Q(geom__intersects=ErosionMap.objects.get(id=getvalue1).geom)) #this queryset below, I want this to be pass to `create_excel` function m = ButuanMaps.objects.filter(*args, **kwargs).values_list('clandpin') return HttpResponse(json.dumps(list(m)), content_type='application/json') 

我想通过variablesm到另一个函数来过滤我的Excel文件。

这里是create_excel ：

 def create_excel(request): book = xlwt.Workbook(encoding='utf8') sheet = book.add_sheet('untitled') default_style = xlwt.Style.default_style datetime_style = xlwt.easyxf(num_format_str='dd/mm/yyyy hh:mm') date_style = xlwt.easyxf(num_format_str='dd/mm/yyyy') headers = [f.name for f in SOMEMODELHERE._meta.fields] #values should have the query of m from `section_landpins` values = LandProperty.objects.all().values_list() values_list = [headers] + list(values) for row, rowdata in enumerate(values_list): for col, val in enumerate(rowdata): if isinstance(val, datetime): style = datetime_style elif isinstance(val, date): style = date_style else: style = default_style sheet.write(row, col, val, style=style) response = HttpResponse(mimetype='application/vnd.ms-excel') response['Content-Disposition'] = 'attachment; filename=example.xls' book.save(response) return response 

如何获得或从section_landpins将queryset m传递给create_excel函数来筛选excel文件的结果？

Answer 1

这听起来像你想访问不同请求之间的variables。 有几种方法可以做到这一点：

1. 当用户访问第二个视图时，只需重新计算m。 如果你这样做，你应该写一个单独的函数，这两个视图方法调用，以获得米。
2. 如果要避免在第二个视图中重新计算m，则可以在第一个视图中cachingm的值，并且只在其过期时重新计算。 https://docs.djangoproject.com/en/dev/topics/cache/
3. 在会话中存储您需要的信息。 这是无用的，因为用户的会话将会过期。 https://docs.djangoproject.com/en/dev/topics/http/sessions/

我想我会先去1，如果你遇到任何性能问题，切换到2。

这里是一个如何做的例子1：

 def section_landpins(request): queryset = get_landpins_from_request(request) return HttpResponse(json.dumps(list(queryset)), content_type='application/json') def create_excel(request): queryset = get_landpins_from_request(request) # Do rest of processing here return response def get_landpins_from_request(request): "Returns queryset of landpins based on GET request." # Add processing of request.GET into a queryset here return queryset 

Answer 2

你可以改变代码

 def section_landpins(request): if request.method == "GET": get_id = request.user.id pnt = ButuanMaps.objects.get(clandpin='162-03-0001-017-33').geom kmdistance = request.GET.get('kmtocity', default=100) mysection = request.GET.get('mysection', default='All') getarea = request.GET.get('getarea', default=5500000) getvalue = request.GET.get('mysoiltype', default=0) getvalue1 = request.GET.get('myerosion', default=0) args = [] kwargs = { 'landproperty__sownerid__id': get_id, 'geom__distance_lte': (pnt, D(km=kmdistance)), 'narea__lte': getarea } if mysection != 'All': kwargs['ssectionid__id'] = mysection if getvalue != '0': args.append(Q(geom__intersects=SoilType.objects.get(id=getvalue).geom)) if getvalue1 != '0': args.append(Q(geom__intersects=ErosionMap.objects.get(id=getvalue1).geom)) #this queryset below, I want this to be pass to `create_excel` function request.m = ButuanMaps.objects.filter(*args, **kwargs).values_list('clandpin') return create_excel(request) def create_excel(request): book = xlwt.Workbook(encoding='utf8') sheet = book.add_sheet('untitled') default_style = xlwt.Style.default_style datetime_style = xlwt.easyxf(num_format_str='dd/mm/yyyy hh:mm') date_style = xlwt.easyxf(num_format_str='dd/mm/yyyy') headers = [f.name for f in SOMEMODELHERE._meta.fields] #the required queryset can be accessed this way values = request.m values = LandProperty.objects.all().values_list() values_list = [headers] + list(values) for row, rowdata in enumerate(values_list): for col, val in enumerate(rowdata): if isinstance(val, datetime): style = datetime_style elif isinstance(val, date): style = date_style else: style = default_style sheet.write(row, col, val, style=style) response = HttpResponse(mimetype='application/vnd.ms-excel') response['Content-Disposition'] = 'attachment; filename=example.xls' book.save(response) return response 

我认为这将工作。