Filter expression with equals with root reference
Setup
Selector: $.items[?(@.key==$.value)]
{"value": 42, "items": [{"key": 10}, {"key": 42}, {"key": 50}]}
Results
Other responses
Bash (JSONPath.sh)
[]
C (json-glib)
Not supported
Unable to compile selector `$.items[?(@.key==$.value)]': Invalid array index definition “?(@.key==$.value)]”
Clojure (json-path)
¹
[
{
"key": 42
}
]
Cpp (jsoncons)
[
{
"key": 42
}
]
Dart (json_path)
Not supported
FormatException: end of input expected at 1:8. Expression: $.items[?(@.key==$.value)]
Elixir (ExJsonPath)
Not supported
syntax error before: '$'
Elixir (jaxon)
[]
Elixir (warpath)
¹
Not supported
Parser error: Invalid token on line 1, syntax error before: <<"$">>
Erlang (ejsonpath)
[
{
"key": 42
}
]
[
{
"key": 42
}
]
[
{
"key": 42
}
]
[
{
"key": 42
}
]
[]
[]
[
{
"key": 42
}
]
[
{
"key": 42
}
]
Haskell (jsonpath)
[
{
"key": 42
}
]
JavaScript (Goessner)
²
[
{
"key": 42
}
]
JavaScript (brunerd)
[
{
"key": 42
}
]
JavaScript (jsonpath)
[]
Java (com.github.jsurfer)
Not supported
line 1:17 no viable alternative at input '@.key==$'
org.antlr.v4.runtime.misc.ParseCancellationException
Java (com.jayway.jsonpath)
¹
³
[
{
"key": 42
}
]
Kotlin (com.nfeld.jsonpathkt)
¹
Not supported
Unexpected char, char=?, index=8
Objective-C (SMJJSONPath)
¹
³
[
{
"key": 42
}
]
PHP (galbar-jsonpath)
²
[
{
"key": 42
}
]
PHP (remorhaz-jsonpath)
[]
PHP (softcreatr-jsonpath)
[]
Python (jsonpath)
²
Not found
jsonpath returned false, this might indicate an error
Python (jsonpath-ng)
Not supported
JsonPathLexerError('Error on line 1, col 8: Unexpected character: ? ')
Python (jsonpath-rw)
Not supported
JsonPathLexerError('Error on line 1, col 8: Unexpected character: ? ')
Python (jsonpath2)
Not supported
line 1:16 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}
ValueError("line 1:16 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}")
Raku (JSON-Path)
Not supported
Evaluation of embedded Perl 6 code not allowed (construct with :allow-eval)
Ruby (jsonpath)
[]
Rust (jsonpath)
Not supported
parsing error
Rust (jsonpath_lib)
[
{
"key": 42
}
]
Rust (jsonpath_plus)
[
{
"key": 42
}
]
Scala (jsonpath)
[
{
"key": 42
}
]
Swift (Sextant)
[
{
"key": 42
}
]
dotNET (Json.NET)
[
{
"key": 42
}
]
dotNET (JsonCons.JsonPath)
[
{
"key": 42
}
]
dotNET (JsonPath.Net)
[
{
"key": 42
}
]
dotNET (Manatee.Json)
[
{
"key": 42
}
]
JSON (Path_Reference_Implementation)
Not supported
--> 1:9
|
1 | $.items[?(@.key==$.value)]
| ^---
|
= expected unionChild, unionArrayIndex, or sliceStart
Proposal (A)
[
{
"key": 42
}
]
Errors
JavaScript (jsonpath-plus)
jsonPath: $ is not defined: @.key==$.value
PHP (Goessner)
²
ArgumentCountError
Perl (JSON-Path)
non-safe evaluation, died at main.pl line 11.
dotNET (JsonPathLib)
$ is not defined
Footnotes
- ¹ This implementation returns a single value where only one match is possible (instead of an array of a single value).
- ² This implementation returns a specific not found value if no match exists.
- ³ This implementation returns a specific not found value if a query that would regularly return a single match results in no match.