A Django newforms field which takes another newforms field during initialization and validates every item in a comma-separated list with this field class. Please use it like this:
from django.newforms import EmailField
emails = CommaSeparatedValuesField(EmailField)
You would be able to enter a string like "[email protected],[email protected]" because every email address would be validated when clean() is executed. This of course also applies to any other Field class.
You can define the sepator (default: ",") during initialization with the
separator
parameter like this:
from django.newforms import EmailField`
emails = SeparatedValuesField(EmailField, separator="###")
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 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | from django import newforms as forms
class SeparatedValuesField(forms.Field):
"""
A Django newforms field which takes another newforms field during
initialization and validates every item in a separated list with
this field class. Please use it like this::
from django.newforms import EmailField
emails = SeparatedValuesField(EmailField)
You would be able to enter a string like "[email protected],[email protected]"
because every email address would be validated when clean() is executed.
This of course also applies to any other Field class.
You can define the sepator (default: ",") during initialization with the
``separator`` parameter like this::
from django.newforms import EmailField
emails = SeparatedValuesField(EmailField, separator="###")
If validation succeeds it returns the original data, though the already
splitted value list can be accessed with the get_list() method.
>>> f = SeparatedValuesField(forms.EmailField)
>>> f.clean("[email protected],[email protected]")
'[email protected],[email protected]'
>>> f.get_list()
['[email protected]', '[email protected]']
>>> f.clean("foobar,[email protected],[email protected]")
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
>>> u = SeparatedValuesField(forms.URLField)
>>> u.clean("http://foo.bar.com,http://foobar.com")
'http://foo.bar.com,http://foobar.com'
>>> u.clean("http:foo.bar.com")
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
>>> f = SeparatedValuesField(forms.EmailField, separator="###")
>>> f.clean("[email protected]###[email protected]")
'[email protected]###[email protected]'
>>> f.clean("foobar###[email protected]###[email protected]")
Traceback (most recent call last):
...
ValidationError: <unprintable ValidationError object>
"""
def __init__(self, base_field=None, separator=",", *args, **kwargs):
super(SeparatedValuesField, self).__init__(*args, **kwargs)
self.base_field = base_field
self.separator = separator
def clean(self, data):
if not data:
raise forms.ValidationError('Enter at least one value.')
self.value_list = data.split(self.separator)
if self.base_field is not None:
base_field = self.base_field()
for value in self.value_list:
base_field.clean(value)
return data
def get_list(self):
return self.value_list
def _test():
import doctest
doctest.testmod()
if __name__ == "__main__":
_test()
|
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Comments
This is pretty cool, thanks! But it doesn't work if the form field (ie EmailField) is allowed to be empty :(
#
This fixes it and also adds a 'strip' field so that you can ignore whitespace in the input:
#
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