Finished Release v0.7.1

README.rst

@@ -228,8 +228,8 @@ You can create array fields containing any data type, for example::
     class SensorData(models.Model):
 
         date = fields.DateField()
-        temperatures = fields.ArrayField(fields.Float32Field)
-        humidity_levels = fields.ArrayField(fields.UInt8Field)
+        temperatures = fields.ArrayField(fields.Float32Field())
+        humidity_levels = fields.ArrayField(fields.UInt8Field())
 
         engine = engines.MergeTree('date', ('date',))
 

src/infi/clickhouse_orm/database.py

@@ -35,7 +35,7 @@ class Database(object):
     def drop_database(self):
         self._send('DROP DATABASE `%s`' % self.db_name)
 
-    def insert(self, model_instances):
+    def insert(self, model_instances, batch_size=1000):
         from six import next
         i = iter(model_instances)
         try:
@@ -45,11 +45,19 @@ class Database(object):
         model_class = first_instance.__class__
         def gen():
             yield self._substitute('INSERT INTO $table FORMAT TabSeparated\n', model_class).encode('utf-8')
-            yield first_instance.to_tsv().encode('utf-8')
-            yield '\n'.encode('utf-8')
+            yield (first_instance.to_tsv() + '\n').encode('utf-8')
+            # Collect lines in batches of batch_size
+            batch = []
             for instance in i:
-                yield instance.to_tsv().encode('utf-8')
-                yield '\n'.encode('utf-8')
+                batch.append(instance.to_tsv())
+                if len(batch) >= batch_size:
+                    # Return the current batch of lines
+                    yield ('\n'.join(batch) + '\n').encode('utf-8')
+                    # Start a new batch
+                    batch = []
+            # Return any remaining lines in partial batch
+            if batch:
+                yield ('\n'.join(batch) + '\n').encode('utf-8')
         self._send(gen())
 
     def count(self, model_class, conditions=None):

src/infi/clickhouse_orm/fields.py

@@ -107,6 +107,8 @@ class DateTimeField(Field):
         if isinstance(value, int):
             return datetime.datetime.fromtimestamp(value, pytz.utc)
         if isinstance(value, string_types):
+            if value == '0000-00-00 00:00:00':
+                return self.class_default
             return datetime.datetime.strptime(value, '%Y-%m-%d %H:%M:%S')
         raise ValueError('Invalid value for %s - %r' % (self.__class__.__name__, value))
 

src/infi/clickhouse_orm/models.py

@@ -154,10 +154,5 @@ class Model(with_metaclass(ModelBase)):
         '''
         Returns the instance's column values as a tab-separated line. A newline is not included.
         '''
-        parts = []
-        for name, field in self._fields:
-            value = field.to_db_string(getattr(self, name), quote=False)
-            parts.append(value)
-        tsv = '\t'.join(parts)
-        logger.debug(tsv)
-        return tsv
+        data = self.__dict__
+        return '\t'.join(field.to_db_string(data[name], quote=False) for name, field in self._fields)

src/infi/clickhouse_orm/utils.py

@@ -14,6 +14,8 @@ SPECIAL_CHARS = {
     "'"  : "\\'"
 }
 
+SPECIAL_CHARS_REGEX = re.compile("[" + ''.join(SPECIAL_CHARS.values()) + "]")
+
 
 def escape(value, quote=True):
     '''
@@ -22,8 +24,10 @@ def escape(value, quote=True):
     converts it to one.
     '''
     if isinstance(value, string_types):
-        chars = (SPECIAL_CHARS.get(c, c) for c in value)
-        value = "'" + "".join(chars) + "'" if quote else "".join(chars)
+        if SPECIAL_CHARS_REGEX.search(value):
+            value = "".join(SPECIAL_CHARS.get(c, c) for c in value)
+        if quote:
+            value = "'" + value + "'"
     return text_type(value)
 
 
@@ -69,8 +73,8 @@ def parse_array(array_string):
         else:
             # Start of non-quoted value, find its end
             match = re.search(r",|\]", array_string)
-            values.append(array_string[1 : match.start() + 1])
-            array_string = array_string[match.end():]
+            values.append(array_string[0 : match.start()])
+            array_string = array_string[match.end() - 1:]
 
 
 def import_submodules(package_name):

tests/test_array_fields.py

@@ -46,6 +46,21 @@ class ArrayFieldsTest(unittest.TestCase):
             with self.assertRaises(ValueError):
                 instance.arr_int = value
 
+    def test_parse_array(self):
+        from infi.clickhouse_orm.utils import parse_array, unescape
+        self.assertEquals(parse_array("[]"), [])
+        self.assertEquals(parse_array("[1, 2, 395, -44]"), ["1", "2", "395", "-44"])
+        self.assertEquals(parse_array("['big','mouse','','!']"), ["big", "mouse", "", "!"])
+        self.assertEquals(parse_array(unescape("['\\r\\n\\0\\t\\b']")), ["\r\n\0\t\b"])
+        for s in ("", 
+                  "[", 
+                  "]", 
+                  "[1, 2", 
+                  "3, 4]", 
+                  "['aaa', 'aaa]"):
+            with self.assertRaises(ValueError):
+                parse_array(s)
+
 
 class ModelWithArrays(Model):