Merge branch 'fix_objectid_validation'

Author: nicolaiarocci

eve/io/mongo/validation.py

@@ -164,7 +164,7 @@ def _validate_data_relation(self, data_relation, field, value):
                              data_resource, data_relation['field']))
 
     def _validate_type_objectid(self, value):
-        if isinstance(value, ObjectId):
+        if ObjectId.is_valid(value):
             return True
 
     def _validate_type_decimal(self, value):

tox.ini

@@ -1,20 +1,19 @@
 [tox]
-envlist=py26,py27,py33,py34,py35,py36,pypy,flake8
+envlist=py26,py27,py33,py34,py35,py36,pypy
 
 [testenv]
 commands=python setup.py test {posargs}
 
 [testenv:flake8]
 deps=flake8
-basepython=python2
-commands=flake8 --ignore=E731,E722 eve {posargs}
+basepython=python3
+commands=flake8 --ignore=E731,E722,F821 eve {posargs}
 
 [tox:travis]
 2.6 = py26
 2.7 = py27
 3.3 = py33
 3.4 = py34
-3.5 = py35
+3.5 = py35, flake8
 3.6 = py36
 pypy = pypy
-flake8 = flake8