Django CBV

cbv.py

import re
from django.http import HttpResponse
from django.shortcuts import render
from functools import wraps


uncamel_patterns = (
    re.compile('(.)([A-Z][a-z]+)'),
    re.compile('([a-z0-9])([A-Z])'),
    )


def uncamel(s):
    """
    Make camelcase lowercase and use underscores.
        >>> uncamel('CamelCase')
        'camel_case'
        >>> uncamel('CamelCamelCase')
        'camel_camel_case'
        >>> uncamel('Camel2Camel2Case')
        'camel2_camel2_case'
        >>> uncamel('getHTTPResponseCode')
        'get_http_response_code'
        >>> uncamel('get2HTTPResponseCode')
        'get2_http_response_code'
        >>> uncamel('HTTPResponseCode')
        'http_response_code'
        >>> uncamel('HTTPResponseCodeXYZ')
        'http_response_code_xyz'
    """
    for pat in uncamel_patterns:
        s = pat.sub(r'\1_\2', s)
    return s.lower()


class Context(object):
    pass


def view(cls):
    """
    View decorator must wrap view class
    """
    @wraps(cls)
    def wrapper(request, **kwargs):
        obj = cls(request, **kwargs)
        handler = getattr(obj, request.method.lower(), None)
        if handler is None:
            return HttpResponse(status_code=405)
        return handler(obj.c) or obj.render(obj.c)
    return wrapper


class View(object):
    def __init__(self, request, **kwargs):
        self.c = Context()
        self.r = request
        self.u = request.user
        self.c.user = self.u
        for k, v in kwargs.items():
            setattr(self, k, v)
        self.setup(self.c)

    def setup(self, c):
        pass

    def render(self, c):
        app = self.__module__.split('.')[0]
        template = '%s/%s.html' % (app, uncamel(self.__class__.__name__))
        return render(self.r, template, c.__dict__)