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See the fields available in a JSON value without showing scalar values
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| use serde_json::Value; | |
| /// Recursively maps the structure of a [`serde_json::Map`], replacing scalar values | |
| /// with type indicators. | |
| pub fn map_structure<'a, I>(item: I) -> Value | |
| where | |
| I: IntoIterator<Item = (&'a String, &'a Value)> + 'a, | |
| { | |
| Value::Object( | |
| item.into_iter() | |
| .map(|(k, v)| (k.to_owned(), value_structure(v))) | |
| .collect(), | |
| ) | |
| } | |
| /// Recursively maps the structure of a [`serde_json::Value`], replacing scalar values | |
| /// with type indicators. | |
| pub fn value_structure(value: &Value) -> Value { | |
| match value { | |
| Value::Null => value.clone(), | |
| Value::Bool(_) => "[bool]".into(), | |
| Value::Number(_) => "[number]".into(), | |
| Value::String(_) => "[string]".into(), | |
| Value::Object(map) => map_structure(map), | |
| Value::Array(array) => array_structure(array), | |
| } | |
| } | |
| /// Recursively maps the structure of a [`serde_json::Value::Array`], replacing | |
| /// scalar values with type indicators. | |
| pub fn array_structure(array: &[Value]) -> Value { | |
| Value::Array(array.iter().map(value_structure).collect()) | |
| } | |
| #[cfg(test)] | |
| mod test { | |
| use pretty_assertions::assert_eq; | |
| use serde_json::json; | |
| use super::map_structure; | |
| #[test] | |
| fn test_key_structure() { | |
| let input = json!({ | |
| "a": 1, | |
| "b": true, | |
| "c": null, | |
| "d": "a string", | |
| "e": [ | |
| 1, | |
| true, | |
| null, | |
| "a string", | |
| [1, 2, 3], | |
| { | |
| "f": 1, | |
| "g": true, | |
| "h": null, | |
| "i": "a string", | |
| "j": [1, 2, 3], | |
| "k": { | |
| "l": 10, | |
| }, | |
| }, | |
| ], | |
| }); | |
| let expected = json!({ | |
| "a": "[number]", | |
| "b": "[bool]", | |
| "c": null, | |
| "d": "[string]", | |
| "e": [ | |
| "[number]", | |
| "[bool]", | |
| null, | |
| "[string]", | |
| ["[number]", "[number]", "[number]"], | |
| { | |
| "f": "[number]", | |
| "g": "[bool]", | |
| "h": null, | |
| "i": "[string]", | |
| "j": ["[number]", "[number]", "[number]"], | |
| "k": { | |
| "l": "[number]", | |
| }, | |
| }, | |
| ], | |
| }); | |
| let result = map_structure(input.as_object().unwrap()); | |
| assert_eq!(result, expected); | |
| } | |
| } |
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