Save a CSV in a Django FileField through a Django view

Question

I am trying to save a whole CSV file uploaded from a form through a Django view. However, when I click the button to upload the CSV to the FileField I get 'str' object has no attribute 'file'

I have seen some questions like this but I haven't managed to save the CSV in the model. What am I missing?

The model:

class wordsFile(models.Model):
table = models.ForeignKey(WordsTable, on_delete=models.CASCADE)
file = models.FileField(upload_to='media/%Y/%m/%d/', blank=True, null=True)

def save(self, *args, **kwargs):
    self.file.save(self.file.name, self.file, save=False)

views.py:

def home(request):
   if request.method == 'POST':
      tp = request.POST.get('tp')
       if tp == "Upload CSV":
          if request.user.is_authenticated:
            upCSV = request.FILES.get('upload')
            wordsFile.save(upCSV.name, upCSV) #HERE is where I save the CSV to the FileField 
            decoded_file = upCSV.read().decode('utf-8')
            io_string = io.StringIO(decoded_file)
            usr = User.objects.get(username=request.user)
            for idx,row in enumerate(csv.reader(io_string, delimiter=',')):
                if idx!=0:
                    wt = WordsTable()
                    wt.user = usr
                    wt.word1 = row[0]  
                    wt.word2 = row[1]
                    wt.word3 = row[2]
                    wt.word4 = row[3]
                    wt.word5 = row[4]
                    wt.save()
            return redirect("home")

The form:

<form method="POST" enctype="multipart/form-data">
    {% csrf_token %}
    <input type="file" name="upload" accept=".csv, .xlsx" value="Upload">
    <br>
   <input type="submit" id="btnupload" class="button btn btn-primary" name="tp" value="Upload CSV">
</form>