Resolve django 1.11 migration errors.

evennia/objects/migrations/0006_auto_20170606_1731.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-06-06 17:31
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+import re
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('objects', '0005_auto_20150403_2339'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='objectdb',
+            name='db_attributes',
+            field=models.ManyToManyField(help_text=b'attributes on this object. An attribute can hold any pickle-able python object (see docs for special cases).', to='typeclasses.Attribute'),
+        ),
+        migrations.AlterField(
+            model_name='objectdb',
+            name='db_sessid',
+            field=models.CharField(help_text=b'csv list of session ids of connected Player, if any.', max_length=32, null=True, validators=[django.core.validators.RegexValidator(re.compile('^\\d+(?:\\,\\d+)*\\Z'), code='invalid', message='Enter only digits separated by commas.')], verbose_name=b'session id'),
+        ),
+        migrations.AlterField(
+            model_name='objectdb',
+            name='db_tags',
+            field=models.ManyToManyField(help_text=b'tags on this object. Tags are simple string markers to identify, group and alias objects.', to='typeclasses.Tag'),
+        ),
+    ]

evennia/objects/models.py

@@ -18,6 +18,7 @@ from builtins import object
 from django.conf import settings
 from django.db import models
 from django.core.exceptions import ObjectDoesNotExist
+from django.core.validators import validate_comma_separated_integer_list
 
 from evennia.typeclasses.models import TypedObject
 from evennia.objects.manager import ObjectDBManager
@@ -172,7 +173,8 @@ class ObjectDB(TypedObject):
     db_player = models.ForeignKey("players.PlayerDB", null=True, verbose_name='player', on_delete=models.SET_NULL,
                                   help_text='a Player connected to this object, if any.')
     # the session id associated with this player, if any
-    db_sessid = models.CommaSeparatedIntegerField(null=True, max_length=32, verbose_name="session id",
+    db_sessid = models.CharField(null=True, max_length=32, validators=[validate_comma_separated_integer_list],
+                                                  verbose_name="session id",
                                                   help_text="csv list of session ids of connected Player, if any.")
     # The location in the game world. Since this one is likely
     # to change often, we set this with the 'location' property

evennia/objects/objects.py

@@ -58,7 +58,7 @@ class ObjectSessionHandler(object):
         self._sessid_cache = list(set(int(val) for val in (self.obj.db_sessid or "").split(",") if val))
         if any(sessid for sessid in self._sessid_cache if sessid not in _SESSIONS):
             # cache is out of sync with sessionhandler! Only retain the ones in the handler.
-            self.sessid_cache = [sessid for sessid in self._sessid_cache if sessid in _SESSIONS]
+            self._sessid_cache = [sessid for sessid in self._sessid_cache if sessid in _SESSIONS]
             self.obj.db_sessid = ",".join(str(val) for val in self._sessid_cache)
             self.obj.save(update_fields=["db_sessid"])