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@parhammmm
Created September 9, 2012 15:41
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Custom django field for storing hex colours
import re
from django import forms
from django.db import models
class ColourFormField(forms.IntegerField):
default_error_messages = {
'invalid': 'Enter a valid colour value: e.g. "#ff0022"',
}
def __init__(self, *args, **kwargs):
super(ColourFormField, self).__init__(*args, **kwargs)
def clean(self, value):
if value == '' and not self.required:
return u''
if not re.match('^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$', value):
raise forms.ValidationError(self.error_messages['invalid'])
value = int(value[1:], 16)
super(ColourFormField, self).clean(value)
return value
class ColourField(models.PositiveIntegerField):
description = "HEX value for a colour"
def __init__(self, *args, **kwargs):
kwargs['max_length'] = 6
super(ColourField, self).__init__(*args, **kwargs)
def to_python(self, value):
super(ColourField, self).to_python(value)
try:
string = hex(value)[2:]
if string == "0":
string = "000000"
return "#"+string.upper()
except TypeError:
return None
def get_prep_value(self, value):
try:
# hex to int, save the int representation of the colour hex code to the database
return value
except ValueError:
return None
def formfield(self, *args, **kwargs):
kwargs['form_class'] = ColourFormField
return super(ColourField, self).formfield(*args, **kwargs)
@kakulukia
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ain't working .. int and e.g. 008000 are not compatible

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