json - PostgreSQL rename attribute in jsonb field

Question

In postgresql 9.5, is there a way to rename an attribute in a jsonb field?

For example:

{ "nme" : "test" }

should be renamed to

{ "name" : "test"}

question from:https://stackoverflow.com/questions/42308764/postgresql-rename-attribute-in-jsonb-field

Answer 1

In UPDATE use delete (-) and concatenate (||) operators, e.g.:

create table example(id int primary key, js jsonb);
insert into example values
    (1, '{"nme": "test"}'),
    (2, '{"nme": "second test"}');

update example
set js = js - 'nme' || jsonb_build_object('name', js->'nme')
where js ? 'nme'
returning *;

 id |           js            
----+-------------------------
  1 | {"name": "test"}
  2 | {"name": "second test"}
(2 rows)