Increment jsonb field by 1 + value in another column using Peewee

jsonb-increment.py

# Suppose table like this
#
# item
# ----
# like_count INTEGER
# snippet JSONB
#
# You want 'like_count' key in snippet also
# and now there is a time to increment

await Item.db_manager.execute(
    Item
    .update(
        like_count=Item.like_count + 1,
        snippet=SQL("jsonb_set(snippet,'{\"like_count\"}', to_jsonb(item.like_count + 1))")
    )
    .where(Item.id == requested_id)
)

# It is stripped nonsense example, but this is how you can build composite fields in jsonb in one update query
# along with usual fields