Fix exception handling in TagField
from django import forms
from django.utils.translation import ugettext as _

from taggit.utils import parse_tags, edit_string_for_tags

class TagParseError(Exception):
    pass

def tags_to_editable_string(tags):
    return u' '.join([u"#%s" % t for t in tags])

def parse_tags(string):
    tags = string.split()
    for tag in tags:
        if not tag.startswith('#'):
            raise TagParseError(_("Tag '%s' does not start with #" % tag))
    return [tag[1:] for tag in tags if len(tag) > 1]

class TagWidget(forms.TextInput):
    def render(self, name, value, attrs=None, renderer=None):
        if value is not None and not isinstance(value, str):
            value = tags_to_editable_string([o.tag for o in value.select_related("tag")])
        return super(TagWidget, self).render(name, value, attrs)

class TagField(forms.CharField):
    widget = TagWidget
    help_text = "asdasd"

    def clean(self, value):
        value = super(TagField, self).clean(value)
        try:
            return parse_tags(value)
        except TagParseError as e:
            raise forms.ValidationError(str(e))


from django import forms
from django.utils.translation import ugettext as _

from taggit.utils import parse_tags, edit_string_for_tags

class TagParseError(Exception):
    pass

def tags_to_editable_string(tags):
    return u' '.join([u"#%s" % t for t in tags])

def parse_tags(string):
    tags = string.split()
    for tag in tags:
        if not tag.startswith('#'):
            raise TagParseError(_("Tag '%s' does not start with #" % tag))
    return [tag[1:] for tag in tags if len(tag) > 1]

class TagWidget(forms.TextInput):
    def render(self, name, value, attrs=None, renderer=None):
        if value is not None and not isinstance(value, str):
            value = tags_to_editable_string([o.tag for o in value.select_related("tag")])
        return super(TagWidget, self).render(name, value, attrs)

class TagField(forms.CharField):
    widget = TagWidget
    help_text = "asdasd"

    def clean(self, value):
        value = super(TagField, self).clean(value)
        try:
            return parse_tags(value)
        except TagParseError as e:
            raise forms.ValidationError(e.msg)

