def get_list_from_ddb_typed_value(cls, node, function_name):
assert isinstance(node, DDBTypedValue)
dynamo_value = node.get_value()
assert isinstance(dynamo_value, DynamoType)
if not dynamo_value.is_list():
raise IncorrectOperandType(function_name, dynamo_value.type)
return dynamo_value
def execute(self, item):
string_set_to_remove = self.get_action_value()
assert isinstance(string_set_to_remove, DynamoType)
if not string_set_to_remove.is_set():
raise IncorrectOperandType(
self.operator,
DDBTypeConversion.get_human_type(string_set_to_remove.type),
)
string_set = self.get_item_at_end_of_path(item)
assert isinstance(string_set, DynamoType)
if string_set.type != string_set_to_remove.type:
raise IncorrectDataType()
# String set is currently implemented as a list
string_set_list = string_set.value
stringset_to_remove_list = string_set_to_remove.value
for value in stringset_to_remove_list:
try:
string_set_list.remove(value)
except (KeyError, ValueError):
# DynamoDB does not mind if value is not present
pass
# DynamoDB does not support empty sets. If we've deleted
# the last item in the set, we have to remove the attribute.
if not string_set_list:
element = self.get_element_to_action()
container = self.get_item_before_end_of_path(item)
container.pop(element.get_attribute_name())
def get_subtraction(cls, left_operand, right_operand):
"""
Args:
left_operand(DynamoType):
right_operand(DynamoType):
Returns:
DDBTypedValue:
"""
try:
return DDBTypedValue(left_operand - right_operand)
except TypeError:
raise IncorrectOperandType("-", left_operand.type)
def execute(self, item):
string_set_to_remove = self.get_action_value()
assert isinstance(string_set_to_remove, DynamoType)
if not string_set_to_remove.is_set():
raise IncorrectOperandType(
self.operator,
DDBTypeConversion.get_human_type(string_set_to_remove.type),
)
string_set = self.get_item_at_end_of_path(item)
assert isinstance(string_set, DynamoType)
if string_set.type != string_set_to_remove.type:
raise IncorrectDataType()
# String set is currently implemented as a list
string_set_list = string_set.value
stringset_to_remove_list = string_set_to_remove.value
for value in stringset_to_remove_list:
try:
string_set_list.remove(value)
except (KeyError, ValueError):
# DynamoDB does not mind if value is not present
pass
# DynamoDB does not support empty sets. If we've deleted
# the last item in the set, we have to remove the attribute.
if not string_set_list:
element = self.get_element_to_action()
if isinstance(element, ExpressionAttributeName):
attribute_name = self.expression_attribute_names[
element.get_attribute_name_placeholder()
]
elif isinstance(element, ExpressionAttribute):
attribute_name = element.get_attribute_name()
else:
raise NotImplementedError(
"Moto does not support deleting {t} yet".format(t=type(element))
)
container = self.get_item_before_end_of_path(item)
del container[attribute_name]
def execute(self, item):
string_set_to_remove = self.get_action_value()
assert isinstance(string_set_to_remove, DynamoType)
if not string_set_to_remove.is_set():
raise IncorrectOperandType(
self.operator,
DDBTypeConversion.get_human_type(string_set_to_remove.type),
)
string_set = self.get_item_at_end_of_path(item)
assert isinstance(string_set, DynamoType)
if string_set.type != string_set_to_remove.type:
raise IncorrectDataType()
# String set is currently implemented as a list
string_set_list = string_set.value
stringset_to_remove_list = string_set_to_remove.value
for value in stringset_to_remove_list:
try:
string_set_list.remove(value)
except (KeyError, ValueError):
# DynamoDB does not mind if value is not present
pass