PostgreSQL: How to use -> and ->> to search SQL JSON?

Question

The below is the json in my 'details' column in a postgreSQL DB. I am trying to do a login check to return the username which matches the password.

{
  "id":"11a8581b-b56f-426e-92f6-a426ba635b98",
  "firstName":"Ryan",
  "lastName":"Bob",
  "username":"ryan",
  "address":"Flat 7, 8 Clisssld Road, London, N16 9AB",
  "email":"ryan@abc.com",
  "password":"$s0$e0801$M/lNYD/JsVN4FoOjs7BwBA==$+C3+A9lAYPMd1YM0FsSbaIzw0wFito4OSEvSrMM/34k="
}

SELECT details -> 'username' 
FROM users WHERE 
details -> 'password' = '$s0$e0801$M/lNYD/JsVN4FoOjs7BwBA==$+C3+A9lAYPMd1YM0FsSbaIzw0wFito4OSEvSrMM/34k=';

Answer 1

PostgreSQL provides two native operators -> and ->> to help you query JSON data.

• The operator -> returns JSON object field as JSON.
• The operator ->> returns JSON object field as text.

I think this link could be really helpful in your case.