def get_resource_links(self, item):
kwargs = resolve_params(item, self.opts.self_url_kwargs or {})
for arg in kwargs.values():
if arg is None:
return None
return super().get_resource_links(item)
def get_top_level_links(self, data, many):
""" Overriding base implementation to support serialization as a related resource. """
self_link = None
if self.self_related_route:
if many:
kwargs = self.self_related_route_kwargs
else:
kwargs = resolve_params(data, self.self_related_route_kwargs)
self_link = self.generate_url(self.self_related_route, **kwargs)
if self_link:
return {"self": self_link}
return super().get_top_level_links(data, many)
def get_related_url(self, obj):
if self.related_url:
params = resolve_params(obj,
self.related_url_kwargs,
default=self.default)
non_null_params = {
key: value
for key, value in params.items() if value is not None
}
if non_null_params:
attr = getattr(obj, self.load_from)
ret = {
'href': self.related_url.format(**non_null_params),
}
if self.many:
count = attr.count() if isinstance(
attr, BaseManager) else len(attr)
ret['meta'] = {'count': count}
return ret
return None
def get_url(self, obj, route_name, **kwargs):
if route_name and self.parent and self.parent.app and isinstance(
self.parent.app, Starlette):
kwargs = resolve_params(obj, kwargs, default=self.default)
return self.parent.app.url_path_for(route_name, **kwargs)
return None