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changseok han edited this page Mar 26, 2019 · 1 revision

Rust - examples

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);

$.store.book[*].author

let json = selector("$.store.book[*].author").unwrap();
let ret = json!([
  "Nigel Rees",
  "Evelyn Waugh",
  "Herman Melville",
  "J. R. R. Tolkien"
]);
assert_eq!(json, ret);

$..author

let json = selector("$..author").unwrap();
let ret = json!([
  "Nigel Rees",
  "Evelyn Waugh",
  "Herman Melville",
  "J. R. R. Tolkien"
]);
assert_eq!(json, ret);

$.store.*

let json = selector("$.store.*").unwrap();
let ret = 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
        }
    ],
    {
        "color": "red",
        "price": 19.95
    }
]);
assert_eq!(ret, json);

$.store..price

let json = selector("$.store..price").unwrap();
let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
assert_eq!(ret, json);

$..book[2]

let json = selector("$..book[2]").unwrap();
let ret = json!([{
    "category" : "fiction",
    "author" : "Herman Melville",
    "title" : "Moby Dick",
    "isbn" : "0-553-21311-3",
    "price" : 8.99
}]);
assert_eq!(ret, json);

$..book[-2]

let json = selector("$..book[-2]").unwrap();
let ret = json!([{
    "category" : "fiction",
    "author" : "Herman Melville",
    "title" : "Moby Dick",
    "isbn" : "0-553-21311-3",
    "price" : 8.99
 }]);
assert_eq!(ret, json);

$..book[0,1]

let json = selector("$..book[0,1]").unwrap();
let ret = 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
  }
]);
assert_eq!(ret, json);

$..book[:2]

let json = selector("$..book[:2]").unwrap();
let ret = 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
  }
]);
assert_eq!(ret, json);

$..book[2:]

let json = selector("$..book[2:]").unwrap();
let ret = json!([
  {
    "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
  }
]);
assert_eq!(ret, json);

$..book[?(@.isbn)]

let json = selector("$..book[?(@.isbn)]").unwrap();
let ret = json!([
  {
    "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
  }
]);
assert_eq!(ret, json);

$.store.book[?(@.price < 10)]

let json = selector("$.store.book[?(@.price < 10)]").unwrap();
let ret = json!([
  {
    "category": "reference",
    "author": "Nigel Rees",
    "title": "Sayings of the Century",
    "price": 8.95
  },
  {
    "category": "fiction",
    "author": "Herman Melville",
    "title": "Moby Dick",
    "isbn": "0-553-21311-3",
    "price": 8.99
  }
]);
assert_eq!(ret, json);

$..book[?((@.price == 12.99 || $.store.bicycle.price < @.price) || @.category == "reference")]

let json = selector(r#"$..book[
                    ?(
                        (@.price == 12.99 || $.store.bicycle.price < @.price) 
                        || @.category == "reference"
                     )]"#).unwrap();
let ret = json!([
  {
    "category": "fiction",
    "author": "Evelyn Waugh",
    "title": "Sword of Honour",
    "price": 12.99
  },
  {
    "category": "fiction",
    "author": "J. R. R. Tolkien",
    "title": "The Lord of the Rings",
    "isbn": "0-395-19395-8",
    "price": 22.99
  },
  {
    "category": "reference",
    "author": "Nigel Rees",
    "title": "Sayings of the Century",
    "price": 8.95
  }
]);
assert_eq!(ret, json);
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