Trait rbatis_sql::ops_index::Index [−][src]
pub trait Index: Sealed { }Expand description
A type that can be used to index into a rbatis_sql::Value.
The get and get_mut methods of Value accept any type that
implements Index, as does the square-bracket indexing operator. This
trait is implemented for strings which are used as the index into a JSON
map, and for usize which is used as the index into a JSON array.
This trait is sealed and cannot be implemented for types outside of
bson.
Examples
let data = bson!({ "inner": [1, 2, 3] });
// Data is a JSON map so it can be indexed with a string.
let inner = &data["inner"];
// Inner is a JSON array so it can be indexed with an integer.
let first = &inner[0];
assert_eq!(first, 1);