You may want to initiate the .docx creation via a trigger in the post_save
function; see:
https://docs.djangoproject.com/en/1.11/ref/signals/#post-save
Also, I would move the "utility" code for creating the invoice number into
a separate function,
as its easier to test and (possibly) call from other parts of your app.
def create_invoice_number(doc_str):
"""Create a new invoice_number."""
last_invoice =
Invoice.objects.filter(invoice_number__startswith=doc_str).\
order_by('invoice_number').last()
if last_invoice:
last_invoice_num = last_invoice.invoice_number[-2:]
new_invoice_num = int(last_invoice_num) + 1
new_invoice_num = "%02d" % new_invoice_num
else:
new_invoice_num = '01'
return new_invoice_num
Then save becomes:
def save(self, *args, **kwargs):
if not self.id:
today = datetime.date.today()
date_str = datetime.datetime.strftime(today, '%y%m%d')
doc_str = 'IN'
self.invoice_number = doc_str + date_str +
create_invoice_number(doc_str)
On Tuesday, 15 August 2017 01:48:12 UTC+2, Alexander Joseph wrote:
>
> Hello, I have an app for creating invoices, but I'd like to be able to
> save a .docx of the invoice when the user creates the invoice (I'm using
> docx library). I'm very new to django so any direction you can give I
> appreciate. I'd like to know the proper way to go about doing this.
>
> Right now I have it so that the 'invoice_number' is generated in the model
> in the save method and the 'created_by' user is assigned to the
> self.request.user in the view. Please let me know if there is a better way
> to do this also. Thanks for your help!
>
> Here is my model ...
>
>
> class Invoice(models.Model):
> created_at = models.DateTimeField(auto_now_add=True)
> their_company = models.ForeignKey(Contact,
> on_delete=models.CASCADE,blank=True, null=True,)
> invoice_number = models.CharField(max_length=50, default='')
> bill_to = models.CharField(max_length=255, default='')
> in_trash = models.BooleanField(default=False)
> created_by = models.ForeignKey(settings.AUTH_USER_MODEL)
>
> def save(self, *args, **kwargs):
>
> if not self.id:
> today = datetime.date.today()
> date_str = datetime.datetime.strftime(today, '%y%m%d')
> doc_str = 'IN'
> last_invoice =
> Invoice.objects.filter(invoice_number__startswith=doc_str).order_by('invoice_number').last()
> if last_invoice:
> last_invoice_num = last_invoice.invoice_number[-2:]
> new_invoice_num = int(last_invoice_num) + 1
> new_invoice_num = "%02d" % new_invoice_num
> else:
> new_invoice_num = '01'
> self.invoice_number = doc_str + date_str + new_invoice_num
>
>
> super(Invoice, self).save(*args, **kwargs)
>
>
> class Meta:
> ordering = ['invoice_number', ]
>
> def __str__(self):
> return self.invoice_number
>
> def get_absolute_url(self):
> return reverse("accounting:invoices:detail", kwargs={"pk": self.pk
> })
>
>
>
>
> and here is my InvoiceCreateView ...
>
>
> class InvoiceCreateView(LoginRequiredMixin, CreateView):
> fields = ("their_company", "bill_to")
> model = Invoice
> form = forms.CreateInvoiceForm()
>
> def form_valid(self, form):
> object = form.save(commit=False)
> object.created_by = self.request.user
> object.save()
>
>
> document = Document()
> #use invoice data to create invoice
>
> #save the doc
> document.save('invoice.docx')
>
> return super(InvoiceCreateView, self).form_valid(form)
>
>
>
>
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