deps.py

from Imp.export import dependency_manager
from Imp.resources import Resource

@dependency_manager
def use_relations(config_model, resources):
    for _id, resource in resources.items():
        res_class = resource.model.__class__
        if resource.model.__module__ == "std" and res_class.__name__ == "File":
            model = resource.model

            for name, attr in model.__entity__._attributes.items():
                # check if the attribute is a relation
                if hasattr(attr, "end"):
                    # get our side
                    attr_end = attr.end

                    if attr_end.depends:
                        requirement = getattr(model, name)
                        print("%s depends on %s" % (model, requirement))

                        req_resource = Resource.get_resource(requirement)
                        if not req_resource:
                            print("  but %s is not exported" % requirement)