tuple_object:format()

object tuple_object¶

tuple_object:format()¶

Get the format of a tuple. The resulting table lists the fields of a tuple (their names and types) if the format option was specified during the tuple creation. Otherwise, the return value is empty.

Return:	the tuple format.
Rtype:	table

Примечание

tuple_object.format() is equivalent to box.tuple.format(tuple_object).

Example:

• A formatted tuple:

  tarantool> f = box.tuple.format.new({{'id', 'number'}, {'name', 'string'}})
  ---
  ...
  
  tarantool> ftuple = box.tuple.new({1, 'Bob'}, {format = f})
  ---
  ...
  
  tarantool> ftuple:format()
  ---
  - [{'name': 'id', 'type': 'number'}, {'name': 'name', 'type': 'string'}]
  ...
  
  tarantool> box.tuple.format(ftuple)
  ---
  - [{'name': 'id', 'type': 'number'}, {'name': 'name', 'type': 'string'}]
  ...
  

• A tuple without a format:

  tarantool> tuple1 = box.tuple.new({1, 'Bob'}) -- no format
  ---
  ...
  
  tarantool> tuple1:format()
  ---
  - []
  ...
  
  tarantool> box.tuple.format(tuple1)
  ---
  - []
  ...