def test_decrement_action_value(self):
action = self.attribute.set(Value(0) - Path('bar'))
placeholder_names, expression_attribute_values = {}, {}
expression = action.serialize(placeholder_names, expression_attribute_values)
assert expression == "#0 = :0 - #1"
assert placeholder_names == {'foo': '#0', 'bar': '#1'}
assert expression_attribute_values == {':0': {'N': '0'}}
def test_table_integration(ddb_url):
table_name = 'pynamodb-ci-table'
# For use with a fake dynamodb connection
# See: http://aws.amazon.com/dynamodb/developer-resources/
conn = TableConnection(table_name, host=ddb_url)
print(conn)
print("conn.describe_table...")
table = None
try:
table = conn.describe_table()
except TableDoesNotExist:
params = {
'read_capacity_units':
1,
'write_capacity_units':
1,
'attribute_definitions': [{
'attribute_type': STRING,
'attribute_name': 'Forum'
}, {
'attribute_type': STRING,
'attribute_name': 'Thread'
}, {
'attribute_type': STRING,
'attribute_name': 'AltKey'
}, {
'attribute_type': NUMBER,
'attribute_name': 'number'
}],
'key_schema': [{
'key_type': HASH,
'attribute_name': 'Forum'
}, {
'key_type': RANGE,
'attribute_name': 'Thread'
}],
'global_secondary_indexes': [{
'index_name':
'alt-index',
'key_schema': [{
'KeyType': 'HASH',
'AttributeName': 'AltKey'
}],
'projection': {
'ProjectionType': 'KEYS_ONLY'
},
'provisioned_throughput': {
'ReadCapacityUnits': 1,
'WriteCapacityUnits': 1,
}
}],
'local_secondary_indexes': [{
'index_name':
'view-index',
'key_schema': [{
'KeyType': 'HASH',
'AttributeName': 'Forum'
}, {
'KeyType': 'RANGE',
'AttributeName': 'AltKey'
}],
'projection': {
'ProjectionType': 'KEYS_ONLY'
}
}]
}
print("conn.create_table...")
conn.create_table(**params)
while table is None:
time.sleep(2)
table = conn.describe_table()
while table['TableStatus'] == 'CREATING':
time.sleep(5)
print(table['TableStatus'])
table = conn.describe_table()
print("conn.update_table...")
conn.update_table(read_capacity_units=table.get(
PROVISIONED_THROUGHPUT).get(READ_CAPACITY_UNITS) + 1,
write_capacity_units=2)
table = conn.describe_table()
while table['TableStatus'] != 'ACTIVE':
time.sleep(2)
table = conn.describe_table()
print("conn.put_item")
conn.put_item(
'item1-hash',
range_key='item1-range',
attributes={'foo': {
'S': 'bar'
}},
condition=NotExists(Path('Forum')),
)
conn.get_item('item1-hash', range_key='item1-range')
conn.delete_item('item1-hash', range_key='item1-range')
items = []
for i in range(10):
items.append({"Forum": "FooForum", "Thread": "thread-{}".format(i)})
print("conn.batch_write_items...")
conn.batch_write_item(put_items=items)
print("conn.batch_get_items...")
data = conn.batch_get_item(items)
print("conn.query...")
conn.query(
"FooForum",
range_key_condition=(BeginsWith(Path('Thread'), Value('thread'))),
)
print("conn.scan...")
conn.scan()
print("conn.delete_table...")
conn.delete_table()