Function json_extract_text 

pub fn json_extract_text<'a, L>(
    left: L,
    path: &'a str,
) -> SQL<'a, SQLiteValue<'a>>
where
    L: ToSQL<'a, SQLiteValue<'a>>,

Helper function for JSON extraction as JSON text using -> operator

Example

let column = SQL::<SQLiteValue>::raw("metadata");
let extract_expr = json_extract_text(column, "preferences");
assert_eq!(extract_expr.sql(), "metadata ->'preferences'");