Filter expression with equals on object with key matching query

Setup

Selector: $[?(@.id==2)]

{"id": 2}

Results

Consensus

[]

Not found consensus

This consensus applies for implementations which return a specific not found value if no match exists.

NOT_FOUND

Other responses

C (json-glib)

Not supported

Unable to compile selector `$[?(@.id==2)]': Invalid array index definition “?(@.id==2)]”

Clojure (json-path) ¹

[
  2
]

Elixir (warpath) ¹

[
  {
    "id": 2
  }
]

Golang (github.com-vmware-labs-yaml-jsonpath)

[
  {
    "id": 2
  }
]

JavaScript (Goessner) ²

[
  2
]

JavaScript (brunerd)

[
  2
]

JavaScript (jsonpathly)

[
  {
    "id": 2
  }
]

Java (com.jayway.jsonpath) ¹ ³

[
  {
    "id": 2
  }
]

Kotlin (com.nfeld.jsonpathkt) ¹

Not supported

Unexpected char, char=?, index=2

Objective-C (SMJJSONPath) ¹ ³

[
  {
    "id": 2
  }
]

PHP (remorhaz-jsonpath)

[
  {
    "id": 2
  }
]

Python (jsonpath-ng)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath-rw)

Not supported

JsonPathLexerError('Error on line 1, col 2: Unexpected character: ? ')

Python (jsonpath2)

Not supported

line 1:9 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}
ValueError("line 1:9 extraneous input '=' expecting {'@', '$', 'true', 'false', 'null', '{', '[', STRING, NUMBER}")

Raku (JSON-Path)

Not supported

Evaluation of embedded Perl 6 code not allowed (construct with :allow-eval)

Ruby (jsonpath)

[
  {
    "id": 2
  }
]

Rust (jsonpath_lib)

[
  {
    "id": 2
  }
]

Scala (jsonpath)

[
  {
    "id": 2
  }
]

Swift (Sextant)

[
  {
    "id": 2
  }
]

Errors

Golang (github.com-oliveagle-jsonpath) ¹

key error:  not found in object

PHP (Goessner) ²

ArgumentCountError

Perl (JSON-Path)

non-safe evaluation, died at main.pl line 11.

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.