can't use forward slash in json path selector

[rafalkrupinski]

Is there any reason that this shouldn't work?

{
  "paths": {
    "/path":"hello"
  }
}

json path:

$.paths./path

result:

"JSONPathSyntaxError: unexpected shorthand selector '/' ('ths./path':8)"

[jg-rp]

$.paths['/path'] should work as expected.

.name is the shorthand equivalent to ['name'] or ["name"], and the spec limits the characters allowed in the shorthand name selector. If we want to select a property by name and that name contains reserved/disallowed characters, we must use the longer form quoted name selector.

As to why the RFC authors chose to disallow /, I'm not not sure 🤷‍♂️ .

Here's the relevant part of the grammar for reference.

member-name-shorthand = name-first *name-char
name-first          = ALPHA /
                      "_"   /
                      %x80-D7FF /
                         ; skip surrogate code points
                      %xE000-10FFFF
name-char           = name-first / DIGIT

DIGIT               = %x30-39              ; 0-9
ALPHA               = %x41-5A / %x61-7A    ; A-Z / a-z