forms.py
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# coding=utf-8
from django import forms
from django.utils.translation import ugettext_lazy as _
from django.utils.html import strip_tags
from subjects.models import Tag
from .models import Webpage
class WebpageForm(forms.ModelForm):
subject = None
def __init__(self, *args, **kwargs):
super(WebpageForm, self).__init__(*args, **kwargs)
self.subject = kwargs['initial'].get('subject', None)
if self.instance.id:
self.subject = self.instance.topic.subject
self.initial['tags'] = ", ".join(self.instance.tags.all().values_list("name", flat = True))
self.fields['students'].queryset = self.subject.students.all()
self.fields['groups'].queryset = self.subject.group_subject.all()
tags = forms.CharField(label = _('Tags'), required = False)
class Meta:
model = Webpage
fields = ['name', 'content', 'brief_description', 'all_students', 'students', 'groups', 'show_window', 'visible']
labels = {
'name': _('Webpage name'),
'content': _('Webpage content'),
}
widgets = {
'content': forms.Textarea,
'brief_description': forms.Textarea,
'students': forms.SelectMultiple,
'groups': forms.SelectMultiple,
}
def clean_name(self):
name = self.cleaned_data.get('name', '')
topics = self.subject.topic_subject.all()
for topic in topics:
if self.instance.id:
same_name = topic.resource_topic.filter(name__unaccent__iexact = name).exclude(id = self.instance.id).count()
else:
same_name = topic.resource_topic.filter(name__unaccent__iexact = name).count()
if same_name > 0:
self._errors['name'] = [_('This subject already has a webpage with this name')]
return ValueError
return name
def clean_content(self):
content = self.cleaned_data.get('content', '')
cleaned_content = strip_tags(content)
if cleaned_content == '':
self._errors['content'] = [_('This field is required.')]
return ValueError
return content
def save(self, commit = True):
super(WebpageForm, self).save(commit = True)
self.instance.save()
previous_tags = self.instance.tags.all()
tags = self.cleaned_data['tags'].split(",")
#Excluding unwanted tags
for prev in previous_tags:
if not prev.name in tags:
self.instance.tags.remove(prev)
for tag in tags:
tag = tag.strip()
exist = Tag.objects.filter(name = tag).exists()
if exist:
new_tag = Tag.objects.get(name = tag)
else:
new_tag = Tag.objects.create(name = tag)
if not new_tag in self.instance.tags.all():
self.instance.tags.add(new_tag)
return self.instance