rhysd / tinyjson Goto Github PK

The README documents the .query method, which cannot be found in the latest release v2.5.1 doc.

I suppose there are some major changes in the git repo are not published yet?

Currently it is hard to access to nested elements. ([] operator panics when the key or index doesn't exist)

We need to consider some query API to

• get nested values without panic
• check if some (nested) keys or indices are existing

API currently I'm thinking about:

let v: JsonValue = r#"[{"foo": true}]"#.parse().unwrap();

// Access to nested element
let found = v.query().child(0).child("foo").find();
assert_eq!(found, Some(&JsonValue::Boolean(true)));

// Check if key exists
assert!(v.query().child(0).exists());
assert!(!v.query().child(1).exists());
assert!(!v.query().child("foo").exists());

// Mutably access to nested element
let Some(found) = v.query_mut().child(0).child("foo").find() else { panic() };
*found = JsonValue::Number(10.0);
assert_eq!(v.stringify().unwrap(), "[{\"foo\":10}]");

My JSON file might not contain a certain key. How do I check if such key exists? I'd rather not resort to catching panics.