def hdel(self, key, *fields):
result = 0
key_id, hash_length = self._get_hash_key_id_and_length(key)
# safe guard
if hash_length == 0:
return result
batch = self._db.write_batch()
for field in fields:
if self._db.get(KEY_CODEC.encode_hash_field(key_id,
field)) is not None:
result += 1
hash_length -= 1
batch.delete(KEY_CODEC.encode_hash_field(key_id, field))
if hash_length == 0:
# remove empty hashes from keyspace
self.delete(key)
else:
batch.put(
KEY_CODEC.encode_hash(key),
KEY_CODEC.encode_key_id_and_length(key, key_id, hash_length))
batch.write()
return result
def hset(self, key, field, value):
result = 0
if self._db.get(KEY_CODEC.encode_hash_field(key, field)) is None:
result = 1
hash_length = int(self._db.get(KEY_CODEC.encode_hash(key), '0'))
with self._db.write_batch() as batch:
batch.put(KEY_CODEC.encode_hash(key), bytes(hash_length + 1))
batch.put(KEY_CODEC.encode_hash_field(key, field), value)
return result
def hsetnx(self, key, field, value):
# only set if not set before
if self._db.get(KEY_CODEC.encode_hash_field(key, field)) is None:
hash_length = int(self._db.get(KEY_CODEC.encode_hash(key), '0'))
with self._db.write_batch() as batch:
batch.put(KEY_CODEC.encode_hash(key), bytes(hash_length + 1))
batch.put(KEY_CODEC.encode_hash_field(key, field), value)
return 1
else:
return 0
def hset(self, key, field, value):
result = 0
key_id, hash_length = self._get_hash_key_id_and_length(key)
if self._db.get(KEY_CODEC.encode_hash_field(key_id, field)) is None:
result = 1
with self._db.write_batch() as batch:
batch.put(
KEY_CODEC.encode_hash(key),
KEY_CODEC.encode_key_id_and_length(key, key_id,
hash_length + result))
batch.put(KEY_CODEC.encode_hash_field(key_id, field), value)
return result
def hsetnx(self, key, field, value):
key_id, hash_length = self._get_hash_key_id_and_length(key)
# only set if not set before
if self._db.get(KEY_CODEC.encode_hash_field(key_id, field)) is None:
with self._db.write_batch() as batch:
batch.put(
KEY_CODEC.encode_hash(key),
KEY_CODEC.encode_key_id_and_length(key, key_id,
hash_length + 1))
batch.put(KEY_CODEC.encode_hash_field(key_id, field), value)
return 1
else:
return 0
def hget(self, key, field):
return self._db.get(KEY_CODEC.encode_hash_field(key, field))
def hget(self, key, field):
key_id, _ = self._get_hash_key_id_and_length(key)
return self._db.get(KEY_CODEC.encode_hash_field(key_id, field))