From 05211dca7f3dd6b15353f22ae7e1320fb676c917 Mon Sep 17 00:00:00 2001
From: Filipp Lepalaan <filipp@mac.com>
Date: Wed, 12 May 2021 14:48:56 +0300
Subject: Stopped using Sites. Added Django 3 req fields

---
 servo/models/common.py | 82 +++++++++++++++++++-------------------------------
 1 file changed, 31 insertions(+), 51 deletions(-)

diff --git a/servo/models/common.py b/servo/models/common.py
index b2b6c51..81e6855 100644
--- a/servo/models/common.py
+++ b/servo/models/common.py
@@ -3,12 +3,10 @@
 import gsxws
 import os.path
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.template.defaultfilters import slugify
 from pytz import common_timezones, country_timezones
 
-from django.contrib.sites.models import Site
-
 from django.db import models
 from django.conf import settings
 
@@ -20,9 +18,6 @@ from django.utils.translation import ugettext_lazy as _
 from django.dispatch import receiver
 from django.db.models.signals import post_save
 
-from django.contrib.contenttypes.models import ContentType
-from django.contrib.contenttypes.fields import GenericForeignKey
-
 from django.core.cache import cache
 
 from servo import defaults
@@ -75,33 +70,14 @@ class CsvTable(object):
         return unicode(self).encode('utf-8')
 
 
-class BaseItem(models.Model):
-    """
-    Base class for a few generic relationships
-    """
-    object_id = models.PositiveIntegerField()
-    content_type = models.ForeignKey(ContentType)
-    content_object = GenericForeignKey("content_type", "object_id")
-
-    class Meta:
-        abstract = True
-        app_label = "servo"
 
-
-class RatedItem(BaseItem):
-    rating = models.PositiveIntegerField()
-
-
-class TimedItem(BaseItem):
-    status = models.CharField(max_length=128)
-    started_at = models.DateTimeField()
-    timeout_at = models.DateTimeField()
-
-
-class TaggedItem(BaseItem):
+class TaggedItem(models.Model):
     """
     A generic tagged item
     """
+    ref = models.CharField(max_length=32)
+    ref_id = models.IntegerField()
+
     tag = models.CharField(max_length=128)
     slug = models.SlugField()
     color = models.CharField(max_length=8, default="")
@@ -115,20 +91,29 @@ class TaggedItem(BaseItem):
 
     class Meta:
         app_label = "servo"
-        unique_together = ("content_type", "object_id", "tag",)
+        unique_together = ("ref", "ref_id", "tag",)
 
 
-class FlaggedItem(BaseItem):
-    flagged_by = models.ForeignKey(settings.AUTH_USER_MODEL)
+class FlaggedItem(models.Model):
+    ref = models.CharField(max_length=32)
+    ref_id = models.IntegerField()
+    flagged_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.SET_NULL
+    )
 
 
-class Event(BaseItem):
+class Event(models.Model):
     """
     Something that happens
     """
-    description = models.CharField(max_length=255)
+    ref = models.CharField(max_length=32)
+    ref_id = models.IntegerField()
 
-    triggered_by = models.ForeignKey(settings.AUTH_USER_MODEL)
+    description = models.CharField(max_length=255)
+    triggered_by = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.SET_NULL)
     triggered_at = models.DateTimeField(auto_now_add=True)
     handled_at = models.DateTimeField(null=True)
 
@@ -170,12 +155,6 @@ class Event(BaseItem):
 
 class GsxAccount(models.Model):
 
-    site = models.ForeignKey(
-        Site,
-        editable=False,
-        default=defaults.site_id
-    )
-
     title = models.CharField(max_length=128, default=_("New GSX Account"))
     sold_to = models.CharField(max_length=10, verbose_name=_("Sold-To"))
     ship_to = models.CharField(max_length=10, verbose_name=_("Ship-To"))
@@ -342,7 +321,8 @@ class Tag(MPTTModel):
         'self',
         null=True,
         blank=True,
-        related_name='children'
+        related_name='children',
+        on_delete=models.SET_NULL,
     )
 
     times_used = models.IntegerField(default=0, editable=False)
@@ -393,13 +373,9 @@ class LocationManager(models.Manager):
 
 
 class Location(models.Model):
-    """A Service Location within a company."""
-
-    site = models.ForeignKey(
-        Site,
-        editable=False,
-        default=defaults.site_id
-    )
+    """
+    A Service Location within a company.
+    """
 
     title = models.CharField(
         max_length=255,
@@ -479,6 +455,7 @@ class Location(models.Model):
         settings.AUTH_USER_MODEL,
         null=True,
         blank=True,
+        on_delete=models.SET_NULL,
         related_name="managed_locations",
         limit_choices_to={'is_visible': True}
     )
@@ -544,7 +521,7 @@ class Location(models.Model):
 
 
 class Configuration(models.Model):
-    site = models.ForeignKey(Site, editable=False, default=defaults.site_id)
+
     key = models.CharField(max_length=255)
     value = models.TextField(default='', blank=True)
 
@@ -775,9 +752,12 @@ class Template(models.Model):
         verbose_name_plural = _('Templates')
 
 
-class Attachment(BaseItem):
+class Attachment(models.Model):
     """A file attached to something."""
 
+    ref = models.CharField(max_length=32)
+    ref_id = models.IntegerField()
+
     mime_type = models.CharField(max_length=64, editable=False)
     content = models.FileField(
         upload_to='attachments',
-- 
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