Identifier generating

* refactors identifier generating into BaseObject class

intervention/models.py

@@ -7,16 +7,11 @@ Created on: 17.11.20
 """
 from django.contrib.auth.models import User
 from django.contrib.gis.db import models
-from django.db import transaction
-from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
-from django.utils.timezone import now
 
-from intervention.settings import INTERVENTION_IDENTIFIER_LENGTH, INTERVENTION_IDENTIFIER_TEMPLATE
 from konova.models import BaseObject, Geometry, UuidModel, BaseResource
 from konova.settings import DEFAULT_SRID_RLP, LANIS_LINK_TEMPLATE
 from konova.utils import generators
-from konova.utils.generators import generate_random_string
 from organisation.models import Organisation
 from user.models import UserActionLogEntry
 
@@ -135,22 +130,6 @@ class Intervention(BaseObject):
     def __str__(self):
         return "{} ({})".format(self.identifier, self.title)
 
-    @staticmethod
-    def _generate_new_identifier() -> str:
-        """ Generates a new identifier for the intervention object
-
-        Returns:
-            str
-        """
-        curr_month = str(now().month)
-        curr_year = str(now().year)
-        rand_str = generate_random_string(
-            length=INTERVENTION_IDENTIFIER_LENGTH,
-            only_numbers=True,
-        )
-        _str = "{}{}{}".format(curr_month, curr_year, rand_str)
-        return INTERVENTION_IDENTIFIER_TEMPLATE.format(_str)
-
     def generate_access_token(self, make_unique: bool = False, rec_depth: int = 5):
         """ Creates a new access token for the intervention