I needed a way to validate non-required, dynamically generated form fields, and clean provided the best solution for this problem.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | from django import forms
from openair.estimate.models import MyModel
MAX_LEG_FORMS = 5
class MyModelForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(MyModelForm, self).__init__(*args, **kwargs)
for i in range(0, MAX_LEG_FORMS):
self.fields['leg_location_%s' % i] = forms.CharField(
label=u'Location',
max_length=50,
required=False
)
self.fields['leg_airport_%s' % i] = forms.RegexField(
label=u'Departure Airport',
max_length=3,
min_length=3,
regex=r'^[a-zA-Z0-9]{3}$',
required=False
)
self.fields['leg_delay_%s' % i] = forms.IntegerField(
label=u'Delay (in hours)',
min_value=0,
initial=0,
required=False
)
def clean(self):
cleaned_data = self.cleaned_data
for i in range(1, MAX_LEG_FORMS):
location = cleaned_data.get("leg_location_%s" % i)
airport = cleaned_data.get("leg_airport_%s" % i)
delay = cleaned_data.get("leg_delay_%s" % i)
if location != '' and airport in ['', False, None]:
airport_msg = 'Validation message here'
self._errors["leg_airport_%s" % i] = self.error_class([airport_msg])
if location != '' and delay in ['', False, None]:
delay_msg = 'Validation message here'
self._errors["leg_delay_%s" % i] = self.error_class([delay_msg])
return cleaned_data
class Meta:
model = MyModel
|
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