//models.py
TAG_FIELD = (
	('director', 'Режиссер'),
	('genre', 'Жанр'),
	('casting', 'В ролях'),
	('word', 'слово'),
)
	

class Tag(models.Model):
	field_name = models.CharField(max_length=20, choices=TAG_FIELD)
	tag_name = models.CharField(max_length=40)

	def __unicode__(self):
		return "%s - %s" % (field_name, tag_name)

class Topic(models.Model):
	title = models.CharField(max_length=20)
	body = models.TextField()
	pub_date = models.DateTimeField(auto_now_add=True)
	tags = models.ManyToManyField(Tag)

	def __unicode__(self):
		return self.title


//forms.py
class TagForm(forms.ModelForm):

	class Meta:
		model = Tag

	def save(self):
		field_name = self.cleaned_data.get("field_name")
		tag_name = self.cleaned_data.get("tag_name")
		try:
			obj = Tag.objects.get(field_name=field_name, tag_name=tag_name)
		except DoesNotExist:
			obj = Tag.objects.create(field_name=field_name, tag_name=tag_name)

FIELDS = (
	('director', 'Режиссер'),
	('genre', 'Жанр'),
	('casting', 'В ролях'),
	('word', 'слово'),
	('group', 'группа'),
	('year', 'Год'),
)

class SearchByTagForm(forms.ModelForm):
	field_name = forms.ChoiceField(max_length=20, choices=FIELDS)
	tag_name = forms.CharField(max_length=30)



//views.py
def search_by_tag(request):
	if request.method == 'POST':
		form = SearchByTagForm(request.POST)
		if form.is_valid():
			field_name = form.cleaned_data.get("field_name")
			tag_name = form.cleaned_data.get("tag_name")
			objects = Topic.objects.filter(field_name=field_name, tag_name=tag_name)
	else:
		form = SearchByTagForm()
	return render_to_response("search.html", {'objects': objects})

def get_by_tag(request):
	objects = Topic.objects.filter(
	return render_to_response("fuck.html"), {})