class DbMemory(DbBase):
-
- def __init__(self, logger_name='db', lock=False):
+ def __init__(self, logger_name="db", lock=False):
super().__init__(logger_name, lock)
self.db = {}
return db_filter
def _find(self, table, q_filter):
-
- def recursive_find(key_list, key_next_index, content, operator, target):
+ def recursive_find(key_list, key_next_index, content, oper, target):
if key_next_index == len(key_list) or content is None:
try:
- if operator == "eq":
- if isinstance(target, list) and not isinstance(content, list):
- return True if content in target else False
- return True if content == target else False
- elif operator in ("neq", "ne"):
- if isinstance(target, list) and not isinstance(content, list):
- return True if content not in target else False
- return True if content != target else False
- if operator == "gt":
+ if oper in ("eq", "cont"):
+ if isinstance(target, list):
+ if isinstance(content, list):
+ return any(
+ content_item in target for content_item in content
+ )
+ return content in target
+ elif isinstance(content, list):
+ return target in content
+ else:
+ return content == target
+ elif oper in ("neq", "ne", "ncont"):
+ if isinstance(target, list):
+ if isinstance(content, list):
+ return all(
+ content_item not in target
+ for content_item in content
+ )
+ return content not in target
+ elif isinstance(content, list):
+ return target not in content
+ else:
+ return content != target
+ if oper == "gt":
return content > target
- elif operator == "gte":
+ elif oper == "gte":
return content >= target
- elif operator == "lt":
+ elif oper == "lt":
return content < target
- elif operator == "lte":
+ elif oper == "lte":
return content <= target
- elif operator == "cont":
- return content in target
- elif operator == "ncont":
- return content not in target
else:
- raise DbException("Unknown filter operator '{}' in key '{}'".
- format(operator, ".".join(key_list)), http_code=HTTPStatus.BAD_REQUEST)
+ raise DbException(
+ "Unknown filter operator '{}' in key '{}'".format(
+ oper, ".".join(key_list)
+ ),
+ http_code=HTTPStatus.BAD_REQUEST,
+ )
except TypeError:
return False
elif isinstance(content, dict):
- return recursive_find(key_list, key_next_index+1, content.get(key_list[key_next_index]), operator,
- target)
+ return recursive_find(
+ key_list,
+ key_next_index + 1,
+ content.get(key_list[key_next_index]),
+ oper,
+ target,
+ )
elif isinstance(content, list):
look_for_match = True # when there is a match return immediately
- if (target is None and operator not in ("neq", "ne")) or \
- (target is not None and operator in ("neq", "ne")):
- look_for_match = False # when there is a match return immediately
+ if (target is None) != (
+ oper in ("neq", "ne", "ncont")
+ ): # one True and other False (Xor)
+ look_for_match = (
+ False # when there is not a match return immediately
+ )
for content_item in content:
if key_list[key_next_index] == "ANYINDEX" and isinstance(v, dict):
+ matches = True
for k2, v2 in target.items():
k_new_list = k2.split(".")
new_operator = "eq"
- if k_new_list[-1] in ("eq", "ne", "gt", "gte", "lt", "lte", "cont", "ncont", "neq"):
+ if k_new_list[-1] in (
+ "eq",
+ "ne",
+ "gt",
+ "gte",
+ "lt",
+ "lte",
+ "cont",
+ "ncont",
+ "neq",
+ ):
new_operator = k_new_list.pop()
- if not recursive_find(k_new_list, 0, content_item, new_operator, v2):
- match = False
+ if not recursive_find(
+ k_new_list, 0, content_item, new_operator, v2
+ ):
+ matches = False
break
- else:
- match = True
else:
- match = recursive_find(key_list, key_next_index, content_item, operator, target)
- if match == look_for_match:
- return match
- if key_list[key_next_index].isdecimal() and int(key_list[key_next_index]) < len(content):
- match = recursive_find(key_list, key_next_index+1, content[int(key_list[key_next_index])],
- operator, target)
- if match == look_for_match:
- return match
+ matches = recursive_find(
+ key_list, key_next_index, content_item, oper, target
+ )
+ if matches == look_for_match:
+ return matches
+ if key_list[key_next_index].isdecimal() and int(
+ key_list[key_next_index]
+ ) < len(content):
+ matches = recursive_find(
+ key_list,
+ key_next_index + 1,
+ content[int(key_list[key_next_index])],
+ oper,
+ target,
+ )
+ if matches == look_for_match:
+ return matches
return not look_for_match
else: # content is not dict, nor list neither None, so not found
- if operator in ("neq", "ne"):
- return True if target is None else False
+ if oper in ("neq", "ne", "ncont"):
+ return target is not None
else:
- return True if target is None else False
+ return target is None
for i, row in enumerate(self.db.get(table, ())):
q_filter = q_filter or {}
for k, v in q_filter.items():
k_list = k.split(".")
operator = "eq"
- if k_list[-1] in ("eq", "ne", "gt", "gte", "lt", "lte", "cont", "ncont", "neq"):
+ if k_list[-1] in (
+ "eq",
+ "ne",
+ "gt",
+ "gte",
+ "lt",
+ "lte",
+ "cont",
+ "ncont",
+ "neq",
+ ):
operator = k_list.pop()
- match = recursive_find(k_list, 0, row, operator, v)
- if not match:
+ matches = recursive_find(k_list, 0, row, operator, v)
+ if not matches:
break
else:
# match
except Exception as e: # TODO refine
raise DbException(str(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:
+ return sum(1 for x in self._find(table, self._format_filter(q_filter)))
+ except DbException:
+ raise
+ except Exception as e: # TODO refine
+ raise DbException(str(e))
+
def get_one(self, table, q_filter=None, fail_on_empty=True, fail_on_more=True):
"""
Obtain one entry matching q_filter
if not fail_on_more:
return deepcopy(row)
if result:
- raise DbException("Found more than one entry with filter='{}'".format(q_filter),
- HTTPStatus.CONFLICT.value)
+ raise DbException(
+ "Found more than one entry with filter='{}'".format(
+ q_filter
+ ),
+ HTTPStatus.CONFLICT.value,
+ )
result = row
if not result and fail_on_empty:
- raise DbException("Not found entry with filter='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ raise DbException(
+ "Not found entry with filter='{}'".format(q_filter),
+ HTTPStatus.NOT_FOUND,
+ )
return deepcopy(result)
except Exception as e: # TODO refine
raise DbException(str(e))
break
else:
if fail_on_empty:
- raise DbException("Not found entry with filter='{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ raise DbException(
+ "Not found entry with filter='{}'".format(q_filter),
+ HTTPStatus.NOT_FOUND,
+ )
return None
del self.db[table][i]
return {"deleted": 1}
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):
+ def _update(
+ self,
+ db_item,
+ update_dict,
+ unset=None,
+ pull=None,
+ push=None,
+ push_list=None,
+ pull_list=None,
+ ):
"""
Modifies an entry at database
- :param table: collection or table
- :param q_filter: Filter
+ :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 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 pull_list: Same as pull but values are arrays where each item is removed from the array
: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.
+ :param push_list: Same as push but values are arrays where each item is and appended instead of appending the
+ whole array
+ :return: True if database has been changed, False if not; Exception on error
"""
- 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_nested_prev = k_list[0]
- for k_nested in k_list[1:]:
- if isinstance(db_nested[k_nested_prev], dict):
- if k_nested not in db_nested[k_nested_prev]:
- db_nested[k_nested_prev][k_nested] = None
- elif isinstance(db_nested[k_nested_prev], list) and k_nested.isdigit():
- # extend list with Nones if index greater than list
- k_nested = int(k_nested)
- if k_nested >= len(db_nested[k_nested_prev]):
- db_nested[k_nested_prev] += [None] * (k_nested - len(db_nested[k_nested_prev]) + 1)
- elif db_nested[k_nested_prev] is None:
- db_nested[k_nested_prev] = {k_nested: None}
- else: # number, string, boolean, ... or list but with not integer key
- raise DbException("Cannot set '{}' on existing '{}={}'".format(k, k_nested_prev,
- db_nested[k_nested_prev]))
- db_nested = db_nested[k_nested_prev]
- k_nested_prev = k_nested
+ def _iterate_keys(k, db_nested, populate=True):
+ k_list = k.split(".")
+ k_item_prev = k_list[0]
+ populated = False
+ if k_item_prev not in db_nested and populate:
+ populated = True
+ db_nested[k_item_prev] = None
+ 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
- db_nested[k_nested_prev] = v
- return {"updated": 1}
+ 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 pull_list:
+ for dot_k, v in pull_list.items():
+ if not isinstance(v, list):
+ raise DbException(
+ "Invalid content at pull_list, '{}' must be an array".format(
+ dot_k
+ ),
+ http_code=HTTPStatus.BAD_REQUEST,
+ )
+ 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_list '{}'. Target is not a list".format(dot_k)
+ )
+ for single_v in v:
+ while single_v in dict_to_update[key_to_update]:
+ dict_to_update[key_to_update].remove(single_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
+ if push_list:
+ for dot_k, v in push_list.items():
+ if not isinstance(v, list):
+ raise DbException(
+ "Invalid content at push_list, '{}' must be an array".format(
+ dot_k
+ ),
+ http_code=HTTPStatus.BAD_REQUEST,
+ )
+ 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.copy()
+ updated = True
+ elif populated and dict_to_update[key_to_update] is None:
+ dict_to_update[key_to_update] = v.copy()
+ updated = True
+ elif not isinstance(dict_to_update[key_to_update], list):
+ raise DbException(
+ "Cannot push '{}'. Target is not a list".format(dot_k),
+ http_code=HTTPStatus.CONFLICT,
+ )
+ else:
+ dict_to_update[key_to_update] += 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,
+ push_list=None,
+ pull_list=None,
+ ):
+ """
+ Modifies an entry at database
+ :param table: collection or table
+ :param q_filter: Filter
+ :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 pull_list: Same as pull but values are arrays where each item is removed from the array
+ :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
+ :param push_list: Same as push but values are arrays where each item is and appended instead of appending the
+ whole array
+ :return: Dict with the number of entries modified. None if no matching is found.
+ """
+ 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,
+ push_list=push_list,
+ pull_list=pull_list,
+ )
+ 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
+
+ def set_list(
+ self,
+ table,
+ q_filter,
+ update_dict,
+ unset=None,
+ pull=None,
+ push=None,
+ push_list=None,
+ pull_list=None,
+ ):
+ """Modifies al matching entries at database. Same as push. Do not fail if nothing matches"""
+ with self.lock:
+ updated = 0
+ found = 0
+ for _, db_item in self._find(table, self._format_filter(q_filter)):
+ found += 1
+ if self._update(
+ db_item,
+ update_dict,
+ unset=unset,
+ pull=pull,
+ push=push,
+ push_list=push_list,
+ pull_list=pull_list,
+ ):
+ updated += 1
+ # if not found and fail_on_empty:
+ # raise DbException("Not found entry with '{}'".format(q_filter), HTTPStatus.NOT_FOUND)
+ return {"updated": updated} if found else None
+
def replace(self, table, _id, indata, fail_on_empty=True):
"""
Replace the content of an entry
break
else:
if fail_on_empty:
- raise DbException("Not found entry with _id='{}'".format(_id), HTTPStatus.NOT_FOUND)
+ raise DbException(
+ "Not found entry with _id='{}'".format(_id),
+ HTTPStatus.NOT_FOUND,
+ )
return None
self.db[table][i] = deepcopy(indata)
return {"updated": 1}
Add a new entry at database
:param table: collection or table
:param indata: content to be added
- :return: database id of the inserted element. Raises a DbException on error
+ :return: database '_id' of the inserted element. Raises a DbException on error
"""
try:
id = indata.get("_id")
Add a new entry at database
:param table: collection or table
:param indata_list: list content to be added
- :return: database ids of the inserted element. Raises a DbException on error
+ :return: list of inserted 'id's. Raises a DbException on error
"""
try:
_ids = []
- for indata in indata_list:
- _id = indata.get("_id")
- if not _id:
- _id = str(uuid4())
- indata["_id"] = _id
- with self.lock:
- if table not in self.db:
- self.db[table] = []
- self.db[table].append(deepcopy(indata))
- _ids.append(_id)
+ with self.lock:
+ for indata in indata_list:
+ _id = indata.get("_id")
+ if not _id:
+ _id = str(uuid4())
+ indata["_id"] = _id
+ with self.lock:
+ if table not in self.db:
+ self.db[table] = []
+ self.db[table].append(deepcopy(indata))
+ _ids.append(_id)
return _ids
except Exception as e: # TODO refine
raise DbException(str(e))
-if __name__ == '__main__':
+if __name__ == "__main__":
# some test code
db = DbMemory()
db.create("test", {"_id": 1, "data": 1})
projects / osm / common.git / blobdiff