Attribute Error in Uploading Excel File to Django - django

Question

I am having trouble uploading excel file to my django application. It is a very simple application that should allow a user to upload an excel file with 3 columns. The application will read the contents of this file and process it into bunch of calculations
here is my forms.py:
class InputForm(forms.Form):
FileLocation = forms.FileField(label='Import Data',required=True,widget=forms.FileInput(attrs={'accept': ".xlsx"}))
settings.py:
FILE_UPLOAD_HANDLERS = ["django_excel.ExcelMemoryFileUploadHandler",
"django_excel.TemporaryExcelFileUploadHandler"]
views.py:
import xlrd
from django.shortcuts import render_to_response, render
from django.conf.urls.static import static
from django.contrib import admin
from django.contrib.staticfiles.urls import staticfiles_urlpatterns
from django.template.context_processors import csrf
from io import TextIOWrapper
from WebApp.forms import *
from django.core.mail import send_mail
from django.utils.safestring import mark_safe
from django.db import connection
import os
import csv
def analyze(request):
if request.method == 'POST':
form = InputForm(request.POST,request.FILES['FileLocation'])
if form.is_valid():
book = xlrd.open_workbook(request.FILES('FileLocation'))
for sheet in book.sheets():
number_of_rows = sheet.nrows
number_of_columns = sheet.ncols
print(number_of_rows)
I upload the file in the form and it gives me an error:
AttributeError at /app/analyze/
'ExcelInMemoryUploadedFile' object has no attribute 'get'
Request Method: POST
Request URL: http://127.0.0.1:8000/data/analyze/
Django Version: 1.11
Exception Type: AttributeError
Exception Value:
Exception Location: C:\Python36\lib\site-packages\django\forms\widgets.py in value_from_datadict, line 367
Python Executable: C:\Python36\python.exe
Python Version: 3.6.4
I am also able to upload a .csv file successfully using the following views.py code:
def analyze(request):
c={}
context = RequestContext(request)
c.update(csrf(request))
abc=['a','b','c']
if request.method == 'POST':
form = InputForm(request.POST,request.FILES)
dataType = request.POST.get("DataType")
print(dataType)
if form.is_valid():
cd = form.cleaned_data #print (cd)
a = TextIOWrapper(request.FILES['FileLocation'].file,encoding='ascii',errors='replace')
#print (request.FILES.keys())
data = csv.reader(a)
row1csv = next(data)
region = row1csv[0]
metric = row1csv[2]
I have tried django-excel with same error.

Answer 1

You're correctly initialising your form for the .CSV case but not in your Excel case:
form = InputForm(request.POST, request.FILES)
Don't initialise using request.FILES['FileLocation'] as that's passing the wrong type to the form. It's expecting a MultiValueDict of uploaded files, not a single uploaded file. That's why it fails when calling get on it.
Next, you can't pass an ExcelInMemoryUploadedFile to xlrd.get_workbook(). You need to save the file to disk first, then pass it's path to the get_workbook() method. The documentation of django-excel gives some easier methods:
book = request.FILES['FileLocation'].get_book() # note the square brackets!
or to directly access a sheet:
sheet = request.FILES['FileLocation'].get_sheet('sheet1')