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DynamoDB - ADD item to nested sets

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This commit is contained in:
Bert Blommers 2019-11-27 12:36:42 +00:00
commit 6d7ad717df
2 changed files with 69 additions and 4 deletions
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26
moto/dynamodb2/models.py
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@ -63,6 +63,16 @@ class DynamoType(object):
elif self.is_map():
self.value = dict((k, DynamoType(v)) for k, v in self.value.items())
def get(self, key):
if not key:
return self
else:
key_head = key.split(".")[0]
key_tail = ".".join(key.split(".")[1:])
if key_head not in self.value:
self.value[key_head] = DynamoType({"NONE": None})
return self.value[key_head].get(key_tail)
def set(self, key, new_value, index=None):
if index:
index = int(index)
@ -383,11 +393,19 @@ class Item(BaseModel):
# created with only this value if it doesn't exist yet
# New value must be of same set type as previous value
elif dyn_value.is_set():
existing = self.attrs.get(key, DynamoType({dyn_value.type: {}}))
if not existing.same_type(dyn_value):
key_head = key.split(".")[0]
key_tail = ".".join(key.split(".")[1:])
if key_head not in self.attrs:
self.attrs[key_head] = DynamoType({dyn_value.type: {}})
existing = self.attrs.get(key_head)
existing = existing.get(key_tail)
if existing.value and not existing.same_type(dyn_value):
raise TypeError()
new_set = set(existing.value).union(dyn_value.value)
self.attrs[key] = DynamoType({existing.type: list(new_set)})
new_set = set(existing.value or []).union(dyn_value.value)
existing.set(
key=None,
new_value=DynamoType({dyn_value.type: list(new_set)}),
)
else: # Number and Sets are the only supported types for ADD
raise TypeError