Performance optimisation for LDListMixin
The LDListMixin call Model.resolve_parent(self.context['request'].path)
to get parent model from request. This instruction result in a SQL request on each call to get the model.
The problem is that the parent function is called on each container serialization : this result a similar SQL request for each ManyToManyField or related ForeignKey field of every object serialized. This is a major performance bottleneck when serializing a large container.
I propose to put this request on a request middleware, and use the result in LDListMixin