from django.apps import AppConfig
from django.contrib.contenttypes import generic


class ResourcesConfig(AppConfig):
    name = 'orchestra.apps.resources'
    verbose_name = 'Resources'
    
    def ready(self):
        from .models import Resource
        # TODO execute on Resource.save()
        relation = generic.GenericRelation('resources.ResourceAllocation')
        for resources in Resource.group_by_content_type():
            model = resources[0].content_type.model_class()
            model.add_to_class('allocations', relation)