Override Wagtail CMS templates based on the URL of the incoming request. Search by specific URL, then look for templates which override by model type.

Wagtail dynamic templates

class PathOverrideable(object):

    def get_template(self, request, mode='', **kwargs):
        try:
            return self._path_overrideable_template
        except AttributeError:

            if not self.url:
                return get_template(self.template)

            path = self.url.strip('/')
            model_name = camelcase_to_underscore(self.specific_class.__name__)

            if mode:
                mode = ':'+mode

            model_template = model_name + mode + '.html'

            full_path = os.path.join('default', path+mode+'.html')
            templates = [full_path]
            logger.debug("Adding candidate template based on URL: %s", full_path)

            previous_index = len(path)
            while True:
                previous_index = path.rfind('/', 0, previous_index)
                if previous_index == -1:
                    break

                candidate = os.path.join('default', path[0:previous_index+1], model_template)
                templates.append(candidate)
                logger.debug("Adding candidate template for path-based model override: %s", candidate)

            #templates.append("%s/%s" % (self.specific_class._meta.app_label, model_name))
            templates.append(self.template)  # add the default template as the last one to seek

            logger.debug("Adding candidate template based on model name only: %s", self.template)
            selected_template = select_template(templates)
            logger.debug("Selected template: %s", selected_template.name)

            self._path_overrideable_template = selected_template
            return self._path_overrideable_template