Python Django: How To Override Validation On Multiplechoicefield

I'm trying to save multiple checkbox selections on a Charfield, but I cannot bypass the message: Select a valid choice. ['...', '...', '...'] is not one of the available choices

Solution 1:

In your models - you're using...

sinais_e_sintomas_locais = models.CharField(
    blank=False, choices=TIPOS_SINAIS_E_SINTOMAS, max_length=255,
    verbose_name="Sinais e Sintomas locais (marque todas as opções \
    válidas) *",
)

... and have choices=TIPOS_SINAIS_E_SINTOMAS which'll work in the event of only a single selection, but where you try to pipe delimit multiple selections, they'll fail to match and cause the validation error.

Answer : remove the choices= option. Although - you should check that all values are valid choices in your clean_<field> methods before pipe delimiting them and saving it as a CharField, eg:

defclean_sinais_e_sintomas_locais(self):
    ssl = self.cleaned_data['sinais_e_sintomas_locais']
    # Check there are no selections or only valid selectionsifnot (ssl orset(ssl).difference(TIPOS_SINAIS_E_SINTOMAS)):
        self.cleaned_data['sinais_e_sintomas_locais'] = '|'.join(ssl)
        return self.cleaned_data['sinais_e_sintomas_locais']
    # Error: some individual values weren't valid...raise forms.ValidationError('some message')