Add get with date range for operations.

accountant/api/models/operations.py

@@ -14,12 +14,13 @@
     You should have received a copy of the GNU Affero General Public License
     along with Accountant.  If not, see <http://www.gnu.org/licenses/>.
 """
+import arrow
+
 from sqlalchemy import func, case, desc
 
 from accountant import db
 
 
-
 class Operation(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     pointed = db.Column(db.Boolean, nullable=False, default=False)
@@ -48,6 +49,14 @@ class Operation(db.Model):
 
     @classmethod
     def get_for_account_and_month(cls, session, account, year, month):
+        begin = arrow.get(year, month, 1)
+        end = begin.ceil('month')
+
+        return cls.get_for_account_and_range(session, account, begin.date(),
+                                             end.date())
+
+    @classmethod
+    def get_for_account_and_range(cls, session, account, begin, end):
         if isinstance(account, int) or isinstance(account, str):
             account_id = account
         else:
@@ -68,8 +77,8 @@ class Operation(db.Model):
         ).subquery()
 
         query = session.query(base_query).select_from(base_query)
-        query = query.filter(func.date_trunc(
+        query = query.filter(base_query.c.operation_date >= str(begin),
-            'month', base_query.c.operation_date) == "%s-%s-01" % (year, month))
+                             base_query.c.operation_date <= str(end))
 
         return query