except Exception as e: # TODO refine
raise DbException(e)
+ def count(self, table, q_filter=None):
+ """
+ Count the number of entries matching q_filter
+ :param table: collection or table
+ :param q_filter: Filter
+ :return: number of entries found (can be zero)
+ :raise: DbException on error
+ """
+ try:
+ with self.lock:
+ collection = self.db[table]
+ db_filter = self._format_filter(q_filter)
+ count = collection.count(db_filter)
+ return count
+ except DbException:
+ raise
+ except Exception as e: # TODO refine
+ raise DbException(e)
+
def get_one(self, table, q_filter=None, fail_on_empty=True, fail_on_more=True):
"""
Obtain one entry matching q_filter
except Exception as e: # TODO refine
raise DbException(e)
- def set_one(self, table, q_filter, update_dict, fail_on_empty=True):
+ def set_one(self, table, q_filter, update_dict, fail_on_empty=True, unset=None, pull=None, push=None):
"""
Modifies an entry at database
:param table: collection or table
:param update_dict: Plain dictionary with the content to be updated. It is a dot separated keys and a value
:param fail_on_empty: If nothing matches filter it returns None unless this flag is set tu True, in which case
it raises a DbException
+ :param unset: Plain dictionary with the content to be removed if exist. It is a dot separated keys, value is
+ ignored. If not exist, it is ignored
+ :param pull: Plain dictionary with the content to be removed from an array. It is a dot separated keys and value
+ if exist in the array is removed. If not exist, it is ignored
+ :param push: Plain dictionary with the content to be appended to an array. It is a dot separated keys and value
+ is appended to the end of the array
:return: Dict with the number of entries modified. None if no matching is found.
"""
try:
+ db_oper = {}
+ if update_dict:
+ db_oper["$set"] = update_dict
+ if unset:
+ db_oper["$unset"] = unset
+ if pull:
+ db_oper["$pull"] = pull
+ if push:
+ db_oper["$push"] = push
+
with self.lock:
collection = self.db[table]
- rows = collection.update_one(self._format_filter(q_filter), {"$set": update_dict})
+ rows = collection.update_one(self._format_filter(q_filter), db_oper)
if rows.matched_count == 0:
if fail_on_empty:
raise DbException("Not found any {} with filter='{}'".format(table[:-1], q_filter),