有没有一种方法可以缓存request.FILES ['file']以在第二个请求中使用它。
我正在尝试确认文件上传。因此，我有两种形式。一种将文件上传到服务器，另一种确认上传。但是，在第二种形式中，request.FILES ['file']当然是空的，因为它是一个新请求。如何缓存文件以在第二个请求中使用它。
这是我的views.py
def file_upload(request):
save = False
if request.method == "POST":
form = UploadFileForm(request.POST, request.FILES)
# In form2 the request.FILES should contain the file I selected in the UploadFileForm
form2 = ConfirmationForm(request.POST, request.FILES)
if not form2:
save = True
elif form.is_valid():
save = False
print("request.POST: ", request.POST)
print("request.FILES: ", request.FILES) # empty
print("save: ", save) #false
print("form: ", form)
print("form2: ", form2) # empty
if not request.FILES:
print("empty")
else:
print("not empty")
updated_obj = 0
created_obj = 0
duplicate_obj = 0
count = 0
# Prüfen ob CSV Datei valide ist (keine doppelten Datensätze)
if form.is_valid():
csv_file = request.FILES['file']
print("csv_file: ", csv_file)
rs1 = list()
rs2 = list()
d_list1 = list()
d_list2 = list()
file = csv_file.read().decode('utf-8').splitlines()
reader_orig = csv.reader(file)
for row in reader_orig:
try:
row_set1 = [row[0], row[1], row[2], row[3], row[4]]
row_set2 = [row[5], row[6]]
if row_set1 not in rs1:
rs1.append(row_set1)
else:
d_list1.append(row_set1)
if row_set2 not in rs2:
rs2.append(row_set2)
else:
d_list2.append(row_set2)
except IndexError:
break
if len(d_list1) and len(d_list2):
messages.error(request, "In der CSV Datei sind folgende Datensätze mehrfach vorhanden")
messages.error(request, "Dosen: %s " % d_list1)
messages.error(request, "Ports: %s " % d_list2)
return redirect('appp:index')
elif len(d_list1) and not len(d_list2):
messages.error(request, "In der ausgewählten CSV Datei sind folgende Dosen mehrfach vorhanden")
messages.error(request, "%s " % d_list1)
return redirect('appp:index')
elif not len(d_list1) and len(d_list2):
messages.error(request, "In der ausgewählten CSV Datei sind folgende Ports mehrfach vorhanden")
messages.error(request, "%s " % d_list2)
return redirect('appp:index')
# Wenn CSV Datei valide ist --> Datei hochladen
csv_file = request.FILES['file']
# print("csv: ", csv_file.name)
#print("csv_file: ", csv_file)
#row_count = csv_file.
# print("length: ", row_count)
# csv_file.close()
#print("csv.seek: ", csv_file.seek(0))
#print("current_pos: ", csv_file.tell())
csv_file.seek(0)
decoded_file = csv_file.read().decode('utf-8').splitlines()
row_count = len(decoded_file)
#print("d_file: ", decoded_file)
reader = csv.reader(decoded_file)
updated_list = list()
created_list = list()
for row in reader:
count += 1
try:
datet = datetime.now().date()
datum = datet.strftime("%d.%m.%Y")
row[7] = datum
row[8] = str(request.user)
#d = [row[0], row[1], row[2], row[3], row[4]]
dataset1 = CSV5.objects.filter(gebaeudebereich=row[0],
gebaeudenummer=row[1], ebene=row[2],
raum=row[3], dose=row[4])#.values_list("gebaeudebereich", "gebaeudenummer",
# "ebene", "raum", "dose")
dataset2 = CSV5.objects.filter(switch_ip=row[5], switch_port=row[6])#.values_list("switch_ip", "switch_port")
ds1 = CSV5.objects.values_list("gebaeudebereich", "gebaeudenummer", "ebene",
"raum", "dose")
ds2 = CSV5.objects.values_list("switch_ip", "switch_port")
#print("ds1: ", ds1)
print("count: ", count)
print("dataset1: ", dataset1)
print("dataset2: ", dataset2)
print("dataset1: ", dataset1.exists())
print("dataset2: ", dataset2.exists())
print("save: ", save)
if (dataset1.exists() and not dataset2.exists()):
#instance = get_object_or_404(CSV5, id=count)
print("Fall 1")
ins = CSV5.objects.filter(gebaeudebereich=row[0],
gebaeudenummer=row[1], ebene=row[2],
raum=row[3], dose=row[4])
#liste.append(ins.values_list())
#print("liste: ", liste)
print ("instance: ", ins)
if save == True:
ins.update(switch_ip=row[5], switch_port=row[6], datum = row[7], akteur = row[8])
else:
updated_list.append(ins)
updated_obj += 1
elif not dataset1.exists() and dataset2.exists():
print("Fall 2")
ins = CSV5.objects.filter(switch_ip=row[5], switch_port=row[6])
print("instance: ", ins)
if save == True:
ins.update(gebaeudebereich = row[0], gebaeudenummer = row[1], ebene = row[2], raum = row[3],
dose = row[4], datum = row[7], akteur = row[8])
else:
updated_list.append(ins.values_list())
print("dat2: ", dataset2)
updated_obj += 1
elif (dataset1.exists() and dataset2.exists()):
print("Fall 3")
#liste.append(dataset1)
#print("liste: ", liste)
duplicate_obj += 1
elif not (dataset1.exists() and dataset2.exists()):
print("Fall 4")
if save == True:
ins = CSV5.objects.get_or_create(id=CSV5.objects.count() + 1, gebaeudebereich=row[0],
gebaeudenummer=row[1], ebene=row[2],
raum=row[3], dose=row[4], switch_ip=row[5], switch_port=row[6],
datum=row[7], akteur=row[8])
created_list.append(ins)
ins.save()
created_obj += 1
except IndexError:
print("IndexError")
break
except IntegrityError:
duplicate_obj += 1
print("IntegrityError")
messages.success(request, "Objects created: %s" % created_obj)
messages.success(request, "Objects updated: %s " % updated_obj)
messages.success(request, "Duplicate Objects: %s " % duplicate_obj)
# After the validation of the file this file is rendered
form2 = ConfirmationForm()
return render(request, "appp/confirmation.html", {'form' : form2})
form = UploadFileForm()
return render(
request, "appp/file_upload.html", {"form": form}
)
因此，form2中的request.FILES不应为空，而应包含UploadFileForm的文件。如何缓存文件。任何帮助将不胜感激。