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views.py
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/
views.py
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from StringIO import StringIO
from django import http
from django.core.serializers.json import Serializer
from django.db.models.query import QuerySet
from django.views.generic import TemplateView
class TemplateContextView(TemplateView):
""" Allow define context in as_view method.
"""
context = dict()
def __init__(self, context=None, **kwargs):
self.context = context or dict()
super(TemplateContextView, self).__init__(**kwargs)
def get(self, request, *args, **kwargs):
self.context.update(self.get_context_data(**kwargs))
return self.render_to_response(self.context)
class AbstractResponseMixin(object):
""" Abstract class for data serialize.
"""
mimetype = "application/text"
@staticmethod
def render_template(context):
"String representation of given context."
return str(context)
def render_to_response(self, context):
"Return HttpResponse."
return http.HttpResponse(
self.render_template(context),
content_type=self.mimetype)
class JSONResponseMixin(AbstractResponseMixin):
""" Serialize queryset or any objects context in JSON.
"""
mimetype = "application/json"
def render_template(self, context):
encoder = Serializer()
if isinstance(context, QuerySet):
return encoder.serialize(context, ensure_ascii=False)
else:
encoder.objects = context
encoder.options = dict()
encoder.stream = StringIO()
encoder.end_serialization()
return encoder.getvalue()
class JSONView(JSONResponseMixin, TemplateView):
""" Render view context in JSON.
"""
pass