django custom validation - reference submitted form value -

i trying django custom validate form field.

i have written code below, cannot think of how reference submitted value of employment_record_date_display_type included in employmentrecordform.

i tried employment_record_date_display_type = employmentrecordform.employment_record_date_display_type gives following error:

type object 'employmentrecordform' has no attribute 'employment_record_date_display_type'

here validation code in forms.py file:

class employmentrecordform(forms.modelform):     .............     def clean_employment_record_completion_date(self):          employment_record_display_type = self.cleaned_data.get('employment_record_display_type')         employment_record_date_display_type = ?????????         employment_record_commencement_date = self.cleaned_data.get('employment_record_commencement_date')         employment_record_completion_date = self.cleaned_data.get('employment_record_completion_date')          if employment_record_display_type == 0:             if employment_record_completion_date not none , employment_record_commencement_date not none:                 if employment_record_commencement_date > employment_record_completion_date:                     if employment_record_date_display_type == 2 or employment_record_date_display_type == 3:                         raise forms.validationerror(_("to date must greater date."))                     elif employment_record_date_display_type == 4 or employment_record_date_display_type == 5:                         raise forms.validationerror(_("finish date must greater start date."))                     elif employment_record_date_display_type == 6 or employment_record_date_display_type == 7:                         raise forms.validationerror(_("end date must greater begin date."))                     elif employment_record_date_display_type == 8 or employment_record_date_display_type == 9:                         raise forms.validationerror(_("this date must greater other date."))                     else:                         raise forms.validationerror(_("completion date must after commencement date."))          return employment_record_completion_date 

how reference submitted value of employment_record_date_display_type ?

you should write custom validator class , in fields want should have validators list property. this:

price = models.integerfield(validators=[mycustomvalidator])