Failure to match "$..['$ref']", "$..['ref']", but succeeds on "$..ref"

[JRAndreassen]

Hi...
I'm trying to use the JsonPath with OpenAPI files...
there is a lot of redirect references that I can't extract of the form:

{
...
 "$ref": "#/x/y/z",
...
}

Given the following JSON

{
    "Junk1": "This is a test to illustrate use of '$' in the attr for the expression $..['$ref'] ",
    "$ref": "Match Root",
    "Subset1":[
        {"Junk2": "Data...",
         "$ref": "Match Subset1"
        }
    ],
    "hierachy1":{
        "hierachy2.1":{
            "hierachy2.1.1":{ "$ref":"Match 2.1.1"},
            "hierachy2.1.2":{ "ref":"Match 2.1.2"},
            "hierachy2.1.3":{ "ref":"No Match 2.1.3"},
            "hierachy2.1.4":{ "$ref":"Match 2.1.4"},
            "hierachy2.1.5":{ "ref":"No Match 2.1.5"}
        },
        "hierachy2.2":{
            "hierachy2.2.1":{ "ref":"No Match 2.2.1"},
            "hierachy2.2.2":{ "$ref":"Match 2.2.2"},
            "hierachy2.2.3":{ "ref":"No Match 2.2.3"},
            "hierachy2.2.4":{ "ref":"No Match 2.2.5"},
            "hierachy2.2.5":{ "$ref":"Match 2.2.5"}
        },
        "hierachy2.3":{
            "hierachy2.3.1":{ "ref":"No Match 2.3.1"},
            "hierachy2.3.2":{ "ref":"No Match 2.3.2"},
            "hierachy2.3.3":{ "ref":"No Match 2.3.3"},
            "hierachy2.3.4":{ "ref":"No Match 2.3.4"},
            "hierachy2.3.5":{ "ref":"No Match 2.3.5"},
            "hierachy2.3.6":{
                "hierachy2.3.6.1":{ "$ref":"Match 2.3.6.1"},
                "hierachy2.3.6.2":{ "ref":"No Match 2.3.6.2"},
                "hierachy2.3.6.3":{ "ref":"No Match 2.3.6.3"},
                "hierachy2.3.6.4":{ "ref":"No Match 2.3.6.4"},
                "hierachy2.3.6.5":{ "ref":"No Match 2.3.6.5"}
                }
            }
    }
}

Using the online JasonPath evaluator, The expressions "$..['$ref']", "$..[$ref]", "$..$ref" should yeild:
The

Select: [String("Match Root")
String("Match Subset1"),
String("Match 2.1.1"),
String("Match 2.1.4"),
String("Match 2.2.2"),
String("Match 2.2.5"),
String("Match 2.3.6.1")]

the expression "$..$ref" causes an error:
Select: Err(path error:
$..
^^^
)

This works: "$..ref"

Select: [String("Match 2.1.2"), String("No Match 2.1.3"), String("No Match 2.1.5"), String("No Match 2.2.1"), String("No Match 2.2.3"), String("No Match 2.2.5"), String("No Match 2.3.1"), String("No Match 2.3.2"), String("No Match 2.3.3"), String("No Match 2.3.4"), String("No Match 2.3.5"), String("No Match 2.3.6.2"), String("No Match 2.3.6.3"), String("No Match 2.3.6.4"), String("No Match 2.3.6.5")]

I'll be happy to contribute, if you have some indicator on where to look/fix
JR

[freestrings]

@JRAndreassen Thank you for your reporting!

[JRAndreassen]

@freestrings :
What would it take to make it able to do content/substring matches:
Taken from "Jayway JsonPath"

• "=~ " left matches regular expression [?(@.name =~ /foo.*?/i)]
• $..book[?(@.author =~ /.*REES/i)] | All books matching regex (ignore case)

What I need is:
Given: "$ref": "#/x/y/z"
I need to find all the entries that starts with "#/x"
So something like:
"$..[?(@.$ref =~ /#*/i)]"

Optimally something more like:
"$..[?(@.$ref LIKE '#*')]"

I'll be happy to contribute, if you give me some indicators where and how.
Thanks
JR

[freestrings]

@JRAndreassen

Currently 'IN' filter operator is under development and then other operators that 'LIKE', RegEx, etc will be supported sequentially.

If you are interested in the development of adding filter operators, you can start from the 'tokenizer.rs'.

Thank you for your attention.

[JRAndreassen]

Thanks for taking care of it...
JR