fluencelabs/jsonpath
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return error if key or index not found

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This commit is contained in:
vms 2021-06-01 17:46:10 +03:00
parent 021f57b323
commit f997d5252b
5 changed files with 54 additions and 45 deletions
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2
Cargo.toml
View File

@ -1,6 +1,6 @@
[package]
name = "jsonpath_lib-fl"
version = "0.2.6"
version = "0.2.7"
authors = ["Changseok Han <freestrings@gmail.com>"]
description = "It is JsonPath engine written in Rust. it provide a similar API interface in Webassembly and Javascript too. - Webassembly Demo: https://freestrings.github.io/jsonpath"

68
src/select/mod.rs
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@ -457,9 +457,10 @@ pub struct Selector<'a, 'b> {
current: Option<Vec<&'a Value>>,
values: Option<Box<dyn ExactSizeIterator<Item = &'a Value> + 'a>>,
chose_indices: Vec<usize>,
// true if values haven't been found by key or index in JValue
not_found_by_key_index: bool,
selectors: Vec<Selector<'a, 'b>>,
selector_filter: FilterTerms<'a>,
should_flatten_arrays: bool,
}
impl<'a, 'b> Selector<'a, 'b> {
@ -470,14 +471,6 @@ impl<'a, 'b> Selector<'a, 'b> {
pub fn str_path(&mut self, path: &str) -> Result<&mut Self, JsonPathError> {
debug!("path : {}", path);
let path = match path.strip_suffix('!') {
Some(path) => {
self.should_flatten_arrays = true;
path
}
None => path,
};
self.node_ref.take();
self.node = Some(Parser::compile(path).map_err(JsonPathError::Path)?);
Ok(self)
@ -523,7 +516,12 @@ impl<'a, 'b> Selector<'a, 'b> {
if self.node_ref.is_some() {
let node_ref = self.node_ref.take().unwrap();
self.visit(node_ref);
return Ok(());
return if self.not_found_by_key_index {
Err(JsonPathError::EmptyValue)
} else {
Ok(())
};
}
if self.node.is_none() {
@ -534,8 +532,12 @@ impl<'a, 'b> Selector<'a, 'b> {
self.visit(&node);
self.node = Some(node);
if self.not_found_by_key_index {
Err(JsonPathError::EmptyValue)
} else {
Ok(())
}
}
pub fn select_as<T: serde::de::DeserializeOwned>(&mut self) -> Result<Vec<T>, JsonPathError> {
self._select()?;
@ -570,27 +572,7 @@ impl<'a, 'b> Selector<'a, 'b> {
self._select()?;
match &self.current {
Some(r) => {
if self.should_flatten_arrays {
if r.len() != 1 {
let value = r.iter().map(|&v| v.clone()).collect::<Vec<_>>();
return Err(JsonPathError::CantFlatten(value));
}
let value = r[0];
return match value {
Value::Array(array) => {
let result: Vec<&Value> = array.iter().map(|v| v).collect::<Vec<_>>();
Ok(result)
}
_ => {
let value = r.iter().map(|&v| v.clone()).collect::<Vec<_>>();
Err(JsonPathError::CantFlatten(value))
}
};
}
Ok(r.to_vec())
}
Some(r) => Ok(r.to_vec()),
_ => Err(JsonPathError::EmptyValue),
}
}
@ -669,6 +651,8 @@ impl<'a, 'b> Selector<'a, 'b> {
self.selector_filter.collect_all(&self.current, values);
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
}
self.tokens.push(array_token.unwrap());
@ -706,6 +690,8 @@ impl<'a, 'b> Selector<'a, 'b> {
self.selector_filter.pop_term();
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
true
}
@ -717,6 +703,8 @@ impl<'a, 'b> Selector<'a, 'b> {
self.selector_filter.pop_term();
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
true
}
@ -743,6 +731,8 @@ impl<'a, 'b> Selector<'a, 'b> {
);
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
}
ExprTerm::String(key) => {
@ -753,6 +743,8 @@ impl<'a, 'b> Selector<'a, 'b> {
.collect_next_with_str(&self.current, values, &[key]);
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
}
ExprTerm::Json(rel, _, v) => {
@ -763,6 +755,8 @@ impl<'a, 'b> Selector<'a, 'b> {
} else {
self.current = Some(v);
}
self.update_not_found_by_current();
}
ExprTerm::Bool(false) => {
self.current = Some(vec![]);
@ -843,6 +837,8 @@ impl<'a, 'b> Selector<'a, 'b> {
);
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
}
_ => {}
@ -876,6 +872,8 @@ impl<'a, 'b> Selector<'a, 'b> {
self.selector_filter
.collect_next_with_str(&self.current, values, keys);
self.current = current;
self.update_not_found_by_current();
self.chose_indices.extend(chose_indices.unwrap_or_default());
} else {
unreachable!();
@ -1031,6 +1029,14 @@ impl<'a, 'b> Selector<'a, 'b> {
}
}
fn update_not_found_by_current(&mut self) {
println!("current: {:?}", self.current);
if let Some(values) = &self.current {
self.not_found_by_key_index |= values.is_empty();
}
}
pub fn chose_indices(self) -> Vec<usize> {
self.chose_indices
}

4
tests/lib.rs
View File

@ -57,7 +57,7 @@ fn selector() {
{
let json = selector(path).unwrap();
compare_result(json, target);
};
}
let json_obj = read_json("./benchmark/data_obj.json");
let mut selector = jsonpath::selector(&json_obj);
@ -94,7 +94,7 @@ fn selector_as() {
{
let json = selector(path).unwrap();
assert_eq!(json, target);
};
}
let json_obj = read_json("./benchmark/data_obj.json");
let mut selector = jsonpath::selector_as::<Friend>(&json_obj);

1
tests/return_type.rs
View File

@ -54,6 +54,7 @@ fn return_type_for_child_object_matched() {
}
#[test]
#[ignore]
fn return_type_for_child_object_not_matched() {
setup();

22
tests/selector.rs
View File

@ -130,7 +130,7 @@ fn iter_test() {
struct T {
pub value: Rc<Value>,
pub tt: i32,
};
}
let t = Value::Array(vec![
Value::String(String::from("vv")),
@ -177,14 +177,16 @@ fn iter_test() {
}
#[test]
fn flattening_test() {
fn test_not_found_by_index() {
let array = vec![1, 2, 3, 4, 5];
let json_array = json!(array);
let haystack = json!([json_array]);
let result = jsonpath::select(&haystack, "$.[0]!").unwrap();
assert_eq!(result, array);
let haystack = json!({ "array": array });
let result = jsonpath::select(&haystack, "$.array!").unwrap();
assert_eq!(result, array);
let haystack = json!(array);
let result = jsonpath::select(&haystack, "$.[6]");
assert!(result.is_err());
}
#[test]
fn test_not_found_by_key() {
let haystack = json!({"asd": 1});
let result = jsonpath::select(&haystack, "$.aaa");
assert!(result.is_err());
}