except Exception as e: # TODO refine
raise DbException(str(e))
+ def _update(self, db_item, update_dict, unset=None, pull=None, push=None):
+ """
+ Modifies an entry at database
+ :param db_item: entry of the table to update
+ :param update_dict: Plain dictionary with the content to be updated. It is a dot separated keys and a value
+ :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: True if database has been changed, False if not; Exception on error
+ """
+ def _iterate_keys(k, db_nested, populate=True):
+ k_list = k.split(".")
+ k_item_prev = k_list[0]
+ populated = False
+ for k_item in k_list[1:]:
+ if isinstance(db_nested[k_item_prev], dict):
+ if k_item not in db_nested[k_item_prev]:
+ if not populate:
+ raise DbException("Cannot set '{}', not existing '{}'".format(k, k_item))
+ populated = True
+ db_nested[k_item_prev][k_item] = None
+ elif isinstance(db_nested[k_item_prev], list) and k_item.isdigit():
+ # extend list with Nones if index greater than list
+ k_item = int(k_item)
+ if k_item >= len(db_nested[k_item_prev]):
+ if not populate:
+ raise DbException("Cannot set '{}', index too large '{}'".format(k, k_item))
+ populated = True
+ db_nested[k_item_prev] += [None] * (k_item - len(db_nested[k_item_prev]) + 1)
+ elif db_nested[k_item_prev] is None:
+ if not populate:
+ raise DbException("Cannot set '{}', not existing '{}'".format(k, k_item))
+ populated = True
+ db_nested[k_item_prev] = {k_item: None}
+ else: # number, string, boolean, ... or list but with not integer key
+ raise DbException("Cannot set '{}' on existing '{}={}'".format(k, k_item_prev,
+ db_nested[k_item_prev]))
+ db_nested = db_nested[k_item_prev]
+ k_item_prev = k_item
+ return db_nested, k_item_prev, populated
+
+ updated = False
+ try:
+ if update_dict:
+ for dot_k, v in update_dict.items():
+ dict_to_update, key_to_update, _ = _iterate_keys(dot_k, db_item)
+ dict_to_update[key_to_update] = v
+ updated = True
+ if unset:
+ for dot_k in unset:
+ try:
+ dict_to_update, key_to_update, _ = _iterate_keys(dot_k, db_item, populate=False)
+ del dict_to_update[key_to_update]
+ updated = True
+ except Exception:
+ pass
+ if pull:
+ for dot_k, v in pull.items():
+ try:
+ dict_to_update, key_to_update, _ = _iterate_keys(dot_k, db_item, populate=False)
+ except Exception:
+ continue
+ if key_to_update not in dict_to_update:
+ continue
+ if not isinstance(dict_to_update[key_to_update], list):
+ raise DbException("Cannot pull '{}'. Target is not a list".format(dot_k))
+ while v in dict_to_update[key_to_update]:
+ dict_to_update[key_to_update].remove(v)
+ updated = True
+ if push:
+ for dot_k, v in push.items():
+ dict_to_update, key_to_update, populated = _iterate_keys(dot_k, db_item)
+ if isinstance(dict_to_update, dict) and key_to_update not in dict_to_update:
+ dict_to_update[key_to_update] = [v]
+ updated = True
+ elif populated and dict_to_update[key_to_update] is None:
+ dict_to_update[key_to_update] = [v]
+ updated = True
+ elif not isinstance(dict_to_update[key_to_update], list):
+ raise DbException("Cannot push '{}'. Target is not a list".format(dot_k))
+ else:
+ dict_to_update[key_to_update].append(v)
+ updated = True
+
+ return updated
+ except DbException:
+ raise
+ except Exception as e: # TODO refine
+ raise DbException(str(e))
+
def set_one(self, table, q_filter, update_dict, fail_on_empty=True, unset=None, pull=None, push=None):
"""
Modifies an entry at database
is appended to the end of the array
:return: Dict with the number of entries modified. None if no matching is found.
"""
- try:
- with self.lock:
- for i, db_item in self._find(table, self._format_filter(q_filter)):
- break
- else:
- if fail_on_empty:
- raise DbException("Not found entry with _id='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
- return None
- for k, v in update_dict.items():
- db_nested = db_item
- k_list = k.split(".")
- k_item_prev = k_list[0]
- for k_item in k_list[1:]:
- if isinstance(db_nested[k_item_prev], dict):
- if k_item not in db_nested[k_item_prev]:
- db_nested[k_item_prev][k_item] = None
- elif isinstance(db_nested[k_item_prev], list) and k_item.isdigit():
- # extend list with Nones if index greater than list
- k_item = int(k_item)
- if k_item >= len(db_nested[k_item_prev]):
- db_nested[k_item_prev] += [None] * (k_item - len(db_nested[k_item_prev]) + 1)
- elif db_nested[k_item_prev] is None:
- db_nested[k_item_prev] = {k_item: None}
- else: # number, string, boolean, ... or list but with not integer key
- raise DbException("Cannot set '{}' on existing '{}={}'".format(k, k_item_prev,
- db_nested[k_item_prev]))
-
- db_nested = db_nested[k_item_prev]
- k_item_prev = k_item
+ with self.lock:
+ for i, db_item in self._find(table, self._format_filter(q_filter)):
+ updated = self._update(db_item, update_dict, unset=unset, pull=pull, push=push)
+ return {"updated": 1 if updated else 0}
+ else:
+ if fail_on_empty:
+ raise DbException("Not found entry with _id='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ return None
- db_nested[k_item_prev] = v
- return {"updated": 1}
- except DbException:
- raise
- except Exception as e: # TODO refine
- raise DbException(str(e))
+ def set_list(self, table, q_filter, update_dict, fail_on_empty=True, unset=None, pull=None, push=None):
+ with self.lock:
+ updated = 0
+ for i, db_item in self._find(table, self._format_filter(q_filter)):
+ if self._update(db_item, update_dict, unset=unset, pull=pull, push=push):
+ updated += 1
+ if i == 0 and fail_on_empty:
+ raise DbException("Not found entry with _id='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ return {"updated": updated} if i else None
def replace(self, table, _id, indata, fail_on_empty=True):
"""
projects / osm / common.git / blobdiff