WIP on Django 1.8 compatibility.

dddp/api.py

@@ -11,8 +11,11 @@ import dbarray
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.db import connection, connections
-from django.db.models import aggregates, Q
-from django.db.models.expressions import ExpressionNode
+from django.db.models import aggregates, Q, Expression
+try:
+    from django.db.models.expressions import ExpressionNode
+except ImportError:
+    ExpressionNode = None
 from django.db.models.sql import aggregates as sql_aggregates
 from django.utils.encoding import force_text
 from django.db import DatabaseError
@@ -353,11 +356,14 @@ class Collection(APIMixin):
 
     def serialize(self, obj, meteor_ids):
         """Generate a DDP msg for obj with specified msg type."""
-        # check for F expressions
-        exps = [
-            name for name, val in vars(obj).items()
-            if isinstance(val, ExpressionNode)
-        ]
+        if ExpressionNode is None:
+            exps = False
+        else:
+            # check for F expressions
+            exps = [
+                name for name, val in vars(obj).items()
+                if isinstance(val, ExpressionNode)
+            ]
         if exps:
             # clone/update obj with values but only for the expression fields
             obj = deepcopy(obj)

dddp/msg.py

@@ -1,16 +1,22 @@
 """Django DDP utils for DDP messaging."""
 from copy import deepcopy
 from dddp import THREAD_LOCAL as this, REMOVED
-from django.db.models.expressions import ExpressionNode
+try:
+    from django.db.models.expressions import ExpressionNode
+except AttributeError:
+    ExpressionNode = None
 
 
 def obj_change_as_msg(obj, msg):
     """Generate a DDP msg for obj with specified msg type."""
-    # check for F expressions
-    exps = [
-        name for name, val in vars(obj).items()
-        if isinstance(val, ExpressionNode)
-    ]
+    if ExpressionNode is None:
+        exps = False
+    else:
+        # check for F expressions
+        exps = [
+            name for name, val in vars(obj).items()
+            if isinstance(val, ExpressionNode)
+        ]
     if exps:
         # clone and update obj with values but only for the expression fields
         obj = deepcopy(obj)

setup.py

@@ -14,10 +14,10 @@ setup(
     packages=find_packages(),
     include_package_data=True,
     install_requires=[
-        'Django>=1.7,<1.8',
+        'Django>=1.7',
         'psycopg2>=2.5.4',
         'gevent>=1.0',
-        'gevent-websocket>=0.9',
+        'gevent-websocket>=0.9,!=0.9.4',
         'meteor-ejson>=1.0',
         'psycogreen>=1.0',
         'django-dbarray>=0.2',