Auth fixes, tests.py, increment method, pep8

Fixed authentication, since Parse appears to have changed their API.

Added tests.py with unit tests for ParseObject and ParseQuery classes.

Added ParseObject.increment(key) method.

pep8 compliance changes, mostly removing end of line whitespace

__init__.py

@@ -11,7 +11,8 @@
 #    You should have received a copy of the GNU General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import urllib, urllib2
+import urllib
+import urllib2
 import base64
 import json
 import datetime
@@ -35,9 +36,11 @@ class ParseBase(object):
 
         request.add_header('Content-type', 'application/json')
 
-        # we could use urllib2's authentication system, but it seems like overkill for this
-        auth_header =  "Basic %s" % base64.b64encode('%s:%s' % (APPLICATION_ID, MASTER_KEY))
-        request.add_header("Authorization", auth_header)
+        #auth_header =  "Basic %s" % base64.b64encode('%s:%s' %
+        #                            (APPLICATION_ID, MASTER_KEY))
+        #request.add_header("Authorization", auth_header)
+        request.add_header("X-Parse-Application-Id", APPLICATION_ID)
+        request.add_header("X-Parse-REST-API-Key", MASTER_KEY)
 
         request.get_method = lambda: http_verb
 
@@ -51,7 +54,8 @@ class ParseBase(object):
     def _ISO8601ToDatetime(self, date_string):
         # TODO: verify correct handling of timezone
         date_string = date_string[:-1] + 'UTC'
-        date = datetime.datetime.strptime(date_string, "%Y-%m-%dT%H:%M:%S.%f%Z")
+        date = datetime.datetime.strptime(date_string,
+                                            "%Y-%m-%dT%H:%M:%S.%f%Z")
         return date
 
 
@@ -69,10 +73,12 @@ class ParseObject(ParseBase):
         return self._object_id
 
     def updatedAt(self):
-        return self._updated_at and self._ISO8601ToDatetime(self._updated_at) or None
+        return (self._updated_at and self._ISO8601ToDatetime(self._updated_at)
+                    or None)
 
     def createdAt(self):
-        return self._created_at and self._ISO8601ToDatetime(self._created_at) or None
+        return (self._created_at and self._ISO8601ToDatetime(self._created_at)
+                    or None)
 
     def save(self):
         if self._object_id:
@@ -90,13 +96,36 @@ class ParseObject(ParseBase):
 
         self = self.__init__(None)
 
+    def increment(self, key, amount=1):
+        """
+        Increment one value in the object. Note that this happens immediately:
+        it does not wait for save() to be called
+        """
+        uri = '/%s/%s' % (self._class_name, self._object_id)
+        txdata = '{"%s": {"__op": "Increment", "amount": %d}}' % (key, amount)
+        ret = self._executeCall(uri, 'PUT', txdata)
+        self._populateFromDict(ret)
+
+    def has(self, attr):
+        return attr in self.__dict__
+
+    def remove(self, attr):
+        self.__dict__.pop(attr)
+
+    def refresh(self):
+        uri = '/%s/%s' % (self._class_name, self._object_id)
+        response_dict = self._executeCall(uri, 'GET')
+        self._populateFromDict(response_dict)
+
     def _populateFromDict(self, attrs_dict):
+        if 'objectId' in attrs_dict:
             self._object_id = attrs_dict['objectId']
-        self._created_at = attrs_dict['createdAt']
-        self._updated_at = attrs_dict['updatedAt']
-
             del attrs_dict['objectId']
+        if 'createdAt' in attrs_dict:
+            self._created_at = attrs_dict['createdAt']
             del attrs_dict['createdAt']
+        if 'updatedAt' in attrs_dict:
+            self._updated_at = attrs_dict['updatedAt']
             del attrs_dict['updatedAt']
 
         attrs_dict = dict(map(self._convertFromParseType, attrs_dict.items()))
@@ -111,8 +140,8 @@ class ParseObject(ParseBase):
                     'className': value._class_name,
                     'objectId': value._object_id}
         elif type(value) == datetime.datetime:
-            value = {'__type': 'Date',
-                    'iso': value.isoformat()[:-3] + 'Z'} # take off the last 3 digits and add a Z
+            # take off the last 3 digits and add a Z
+            value = {'__type': 'Date', 'iso': value.isoformat()[:-3] + 'Z'}
         elif type(value) == ParseBinaryDataWrapper:
             value = {'__type': 'Bytes',
                     'base64': base64.b64encode(value)}
@@ -122,13 +151,14 @@ class ParseObject(ParseBase):
     def _convertFromParseType(self, prop):
         key, value = prop
 
-        if type(value) == dict and value.has_key('__type'):
+        if type(value) == dict and '__type' in value:
             if value['__type'] == 'Pointer':
                 value = ParseQuery(value['className']).get(value['objectId'])
             elif value['__type'] == 'Date':
                 value = self._ISO8601ToDatetime(value['iso'])
             elif value['__type'] == 'Bytes':
-                value = ParseBinaryDataWrapper(base64.b64decode(value['base64']))
+                value = ParseBinaryDataWrapper(base64.b64decode(
+                                                        value['base64']))
             else:
                 raise Exception('Invalid __type.')
 
@@ -139,9 +169,11 @@ class ParseObject(ParseBase):
         properties_list = self.__dict__.items()
 
         # filter properties that start with an underscore
-        properties_list = filter(lambda prop: prop[0][0] != '_', properties_list)
+        properties_list = filter(lambda prop: prop[0][0] != '_',
+                                    properties_list)
 
-        #properties_list = [(key, value) for key, value in self.__dict__.items() if key[0] != '_']
+        #properties_list = [(key, value) for key, value
+        #                        in self.__dict__.items() if key[0] != '_']
 
         properties_list = map(self._convertToParseType, properties_list)
 
@@ -227,8 +259,8 @@ class ParseQuery(ParseBase):
         return self._fetch(single_result=True)
 
     def fetch(self):
-        # hide the single_result param of the _fetch method from the library user
-        # since it's only useful internally
+        # hide the single_result param of the _fetch method from the library
+        # user since it's only useful internally
         return self._fetch()
 
     def _fetch(self, single_result=False):
@@ -251,5 +283,5 @@ class ParseQuery(ParseBase):
         if single_result:
             return ParseObject(self._class_name, response_dict)
         else:
-            return [ParseObject(self._class_name, result) for result in response_dict['results']]
-                
+            return [ParseObject(self._class_name, result)
+                        for result in response_dict['results']]

tests.py

+"""
+Contains unit tests for the Python Parse REST API wrapper
+"""
+
+import unittest
+import urllib2
+import datetime
+
+import __init__ as ParsePy
+
+try:
+    import settings_local
+except ImportError:
+    raise ImportError("You must create a settings_local.py file " +
+                      "with an example application to run tests")
+
+ParsePy.APPLICATION_ID = settings_local.APPLICATION_ID
+ParsePy.MASTER_KEY = settings_local.MASTER_KEY
+
+
+### FUNCTIONS ###
+
+def test_obj(saved=False):
+    """Return a test ParsePy.ParseObject (content is from the docs)"""
+    ret = ParsePy.ParseObject("GameScore")
+    ret.score = 1337
+    ret.playerName = "Sean Plott"
+    ret.cheatMode = False
+    if saved:
+        ret.save()
+    return ret
+
+
+### CLASSES ###
+
+class TestParseObjectAndQuery(unittest.TestCase):
+    """
+    Tests for the ParsePy.ParseObject interface for creating and updating Parse
+    objects, as well as the ParsePy.ParseQuery interface for retrieving them
+    """
+
+    def check_test_obj(self, o):
+        """check that the object is consistent with the test object"""
+        self.assertEqual(o.objectId().__class__, unicode)
+        self.assertEqual(o.updatedAt().__class__, datetime.datetime)
+        self.assertEqual(o.createdAt().__class__, datetime.datetime)
+        self.assertEqual(o.score, 1337)
+        # TODO: str vs unicode
+        #self.assertEqual(o.playerName.__class__, unicode)
+        self.assertEqual(o.cheatMode.__class__, bool)
+
+    def test_object(self):
+        """Test the creation, retrieval and updating of a ParseObject"""
+        gameScore = test_obj()
+        gameScore.save()
+        self.check_test_obj(gameScore)
+
+        # retrieve a new one
+        query = ParsePy.ParseQuery("GameScore")
+        obj1 = query.get(gameScore.objectId())
+        self.check_test_obj(obj1)
+
+        # now update it
+        current_updated = obj1.updatedAt()
+        obj1.score = 1000
+        obj1.save()
+        self.assertGreater(obj1.updatedAt(), current_updated)
+        self.assertEqual(obj1.score, 1000)
+
+        # re-retrieve it
+        obj2 = query.get(obj1.objectId())
+        self.assertEqual(obj2.score, 1000)
+
+        # change one object, check that others can be refreshed
+        obj2.score = 2000
+        obj2.save()
+
+        self.assertEqual(obj1.score, 1000)
+        obj1.refresh()
+        self.assertEqual(obj1.score, 2000)
+
+        # try removing a field
+        obj2.remove("score")
+        obj2.save()
+        self.assertEqual(obj2.has("score"), False)
+
+    def test_increment(self):
+        """Test incrementation of fields"""
+        o = test_obj(True)
+        self.check_test_obj(o)
+        o.save()
+
+        o.increment("score")
+        self.assertEqual(o.score, 1338)
+
+        query = ParsePy.ParseQuery("GameScore")
+        o2 = query.get(o.objectId())
+        self.assertEqual(o2.score, 1338)
+
+        # one more time
+        o.increment("score")
+        self.assertEqual(o.score, 1339)
+        o3 = query.get(o.objectId())
+        self.assertEqual(o3.score, 1339)
+
+    def test_relationship(self):
+        """Test relationship between objects"""
+        post = ParsePy.ParseObject("Post")
+        post.title = "I'm Hungry"
+        post.content = "Where should we go for lunch?"
+        post.save()
+
+        comment = ParsePy.ParseObject("Comment")
+        comment.content = "Let's do Sushirrito"
+        comment.parent = post
+        comment.save()
+
+        # that should have saved both post and comment
+        post_id = post.objectId()
+        comment_id = comment.objectId()
+        self.assertEqual(post_id.__class__, unicode)
+        self.assertEqual(comment_id.__class__, unicode)
+
+        # retrieve new ones
+        post2 = ParsePy.ParseQuery("Post").get(post_id)
+        comment2 = ParsePy.ParseQuery("Comment").get(comment_id)
+        # check the relationship between the saved post and comment
+        self.assertEqual(comment2.parent.objectId(), post_id)
+        self.assertEqual(comment2.parent.title, "I'm Hungry")
+
+
+if __name__ == "__main__":
+    # command line
+    unittest.main()