return (self.totais() or 0) - (self.baixado() or 0) Geat!
Thank's Em dom, 7 de abr de 2019 às 21:29, 'Vinod Kumar' via Django users < [email protected]> escreveu: > Hi > It error generate from model string represention where you are trying to > add two other relationship model key those don't have any object. > > Please let me know if you have any other questions. > Or share with me model structure. > > I'm happy to help you. > > On Mon, Apr 8, 2019, 5:45 AM Elias Coutinho <[email protected]> > wrote: > >> Save some people. >> >> Friends lack sufficient knowledge to try to solve this problem alone. >> >> I have these 3 classes below: >> >> Historical >> <https://github.com/CoutinhoElias/pesquisasatisfacao/blob/master/pesquisasatisfacao/financeiro/models.py#L15-L43>, >> Account >> <https://github.com/CoutinhoElias/pesquisasatisfacao/blob/master/pesquisasatisfacao/financeiro/models.py#L46-L72>, >> Payment >> <https://github.com/CoutinhoElias/pesquisasatisfacao/blob/master/pesquisasatisfacao/financeiro/models.py#L75-L85> >> >> In the admin I can list in the History the added values of Account and >> Payment as well so I will search in the respective models, however I think >> it is interesting to also present a column with the remaining value, that >> is, Account - Payment (Clustered value of accounts subtracted from the >> payment) . >> >> I thought it would be easy to do but it returns me the following error: >> >> unsupported operand type (s) for -: 'NoneType' and 'NoneType' >> >> I know it means the message but I do not know how to solve it. >> >> Has anyone ever experienced this? Can you help me? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Django users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/django-users. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/d3190fd9-0fdf-4e1d-9f3d-6a0120662b3e%40googlegroups.com >> <https://groups.google.com/d/msgid/django-users/d3190fd9-0fdf-4e1d-9f3d-6a0120662b3e%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > ************************************************************************ > > *This e-mail and all attachments are intended solely for use by the > intended recipient and may contain confidential / proprietary information > of KiwiTech, LLC, subject to important disclaimers and conditions including > restrictions on the use, disclosure, transfer or export of such > information.* *If you have received this message in error or are not the > named recipient(s), please immediately notify the sender at the telephone > number stated above or by reply e-mail and delete this e-mail from your > computer* > > -- > You received this message because you are subscribed to a topic in the > Google Groups "Django users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/django-users/ZF9sj04neCQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/CAJOHC1y6PAWRJBmGqk7%3DZFbDrFFZJaqgAvEwZdxm5x5T%3DAq-TQ%40mail.gmail.com > <https://groups.google.com/d/msgid/django-users/CAJOHC1y6PAWRJBmGqk7%3DZFbDrFFZJaqgAvEwZdxm5x5T%3DAq-TQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Elias Coutinho. Aprender sobre alguns assuntos é fundamental. Aprender sobre Deus é indiscutivelmente o melhor conteúdo. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CALgom8oxkTiUiF%3DtmzGmZDfqbYcRSNvCoZgkZd0BDwhBCCTRFw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
