1 unstable release
Uses old Rust 2015
0.0.1 | Feb 29, 2024 |
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#42 in #json-path
19,116 downloads per month
Used in 28 crates
(via polars-ops)
300KB
6K
SLoC
jsonpath_lib
VENDOR OF POLARS; DON'T USE.
See https://crates.io/crates/jsonpath_lib for the original.
lib.rs
:
JsonPath implementation written in Rust.
Example
extern crate jsonpath_lib as jsonpath;
#[macro_use] extern crate serde_json;
let json_obj = json!({
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
});
let mut selector = jsonpath::selector(&json_obj);
assert_eq!(selector("$.store.book[*].author").unwrap(),
vec![
"Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien"
]);
assert_eq!(selector("$..author").unwrap(),
vec![
"Nigel Rees", "Evelyn Waugh", "Herman Melville", "J. R. R. Tolkien"
]);
assert_eq!(selector("$.store.*").unwrap(),
vec![
&json!([
{ "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 },
{ "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 },
{ "category": "fiction", "author": "Herman Melville", "title": "Moby Dick", "isbn": "0-553-21311-3", "price": 8.99 },
{ "category": "fiction", "author": "J. R. R. Tolkien", "title": "The Lord of the Rings", "isbn": "0-395-19395-8", "price": 22.99 }
]),
&json!({ "color": "red", "price": 19.95 })
]);
assert_eq!(selector("$.store..price").unwrap(),
vec![
8.95, 12.99, 8.99, 22.99, 19.95
]);
assert_eq!(selector("$..book[2]").unwrap(),
vec![
&json!({
"category" : "fiction",
"author" : "Herman Melville",
"title" : "Moby Dick",
"isbn" : "0-553-21311-3",
"price" : 8.99
})
]);
assert_eq!(selector("$..book[-2]").unwrap(),
vec![
&json!({
"category" : "fiction",
"author" : "Herman Melville",
"title" : "Moby Dick",
"isbn" : "0-553-21311-3",
"price" : 8.99
})
]);
assert_eq!(selector("$..book[0,1]").unwrap(),
vec![
&json!({"category" : "reference","author" : "Nigel Rees","title" : "Sayings of the Century","price" : 8.95}),
&json!({"category" : "fiction","author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99})
]);
assert_eq!(selector("$..book[:2]").unwrap(),
vec![
&json!({"category" : "reference","author" : "Nigel Rees","title" : "Sayings of the Century","price" : 8.95}),
&json!({"category" : "fiction","author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99})
]);
assert_eq!(selector("$..book[:2]").unwrap(),
vec![
&json!({"category" : "reference","author" : "Nigel Rees","title" : "Sayings of the Century","price" : 8.95}),
&json!({"category" : "fiction","author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99})
]);
assert_eq!(selector("$..book[?(@.isbn)]").unwrap(),
vec![
&json!({"category" : "fiction","author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99}),
&json!({"category" : "fiction","author" : "J. R. R. Tolkien","title" : "The Lord of the Rings","isbn" : "0-395-19395-8","price" : 22.99})
]);
assert_eq!(selector("$.store.book[?(@.price < 10)]").unwrap(),
vec![
&json!({"category" : "reference","author" : "Nigel Rees","title" : "Sayings of the Century","price" : 8.95}),
&json!({"category" : "fiction","author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99})
]);
Dependencies
~1.5–2.6MB
~50K SLoC