/
managers.py
52 lines (40 loc) · 1.82 KB
/
managers.py
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from new import instancemethod
import models
from django.db import models as django_models
NOT_CONSTANTS = ["CHOICES", "CHOICES_DICT", "REVERTED_CHOICES_DICT"]
# BASE
class BaseQuerySet(django_models.query.QuerySet):
def failed(self):
"""Chainable filter to retrieve only errors elements."""
return self.filter(status__gte=100)
class BaseManager(django_models.Manager):
use_for_related_fields = True
def get_query_set(self):
""" Use our custom QuerySet. """
return BaseQuerySet(self.model)
def failed(self):
return self.get_query_set().failed()
def add_filters():
"""Add filters for every choice in ItemToPush.STATUS.
This filters are mostly useless except if you do a lot of management from
command line"""
constants = [c for c in dir(models.ITEM_TO_PUSH_STATUS) if c.isupper() and c not in NOT_CONSTANTS]
for current_constant in constants:
method_name = current_constant.lower()
def get_filter_function(constant):
def filter_by_status(self):
value = getattr(models.ITEM_TO_PUSH_STATUS, constant)
return self.filter(status=value)
return filter_by_status
filter_by_status = get_filter_function(current_constant)
filter_by_status_method = instancemethod(filter_by_status, None, BaseQuerySet)
setattr(BaseQuerySet, method_name, filter_by_status_method)
def get_query_function(name):
def query_by_status(self):
method = getattr(self.get_query_set(), name)
return method()
return query_by_status
query_by_status = get_query_function(method_name)
query_by_status_method = instancemethod(query_by_status, None, BaseManager)
setattr(BaseManager, method_name, query_by_status_method)
add_filters()