Handle root path '.' correctly in JSON.OBJLEN command

[JyotinderSingh]

The current implementation of JSON.OBJLEN does not correctly handle the root path '.'. This needs to be fixed to align with Redis behavior.

Current behavior: When using JSON.OBJLEN doc ., the library is unable to parse it and returns an error.

Expected behavior: JSON.OBJLEN doc . should return the length of the complete parent object, consistent with Redis behavior.

Additional context:

• This issue was identified in PR #593: https://github.com/DiceDB/dice/pull/593#discussion_r1761191999
• After implementation, appropriate tests should be added or updated in integration_tests/commands/json_test.go

Tasks:

• [ ] Implement the fix in evalJSONOBJLEN function
• [ ] Add or update tests to cover this scenario
• [ ] Ensure the fix doesn't introduce any regressions

[AshikBN]

@JyotinderSingh pls assign this to me.

[JyotinderSingh]

@JyotinderSingh pls assign this to me.

Assigned.

[HassanAarzoo]

@AshikBN Are you working on this? If not I would like to pick this up

[AshikBN]

i have not yet, you can start if you are interested @JyotinderSingh Can this be assigned to @HassanAarzoo Please

[kapishmalik]

@JyotinderSingh I am also interested to work on this issue

[arpitbbhayani]

Hello @AshikBN,

There has been no activity on this issue for the past 5 days. It would be awesome if you keep posting updates to this issue so that we know you are actively working on it.

We are really eager to close this issue at the earliest, hence if we continue to see the inactivity, we will have to reassign the issue to someone else. We are doing this to ensure that the project maintains its momentum and others are not blocked on this work.

Just drop a comment with the current status of the work or share any issues you are facing. We can always chip in to help you out.

Thanks again.

[iamskp11]

Hey @JyotinderSingh, requesting you to assign this to me. Would like to fix this particular case.

[JyotinderSingh]

Hey @JyotinderSingh, requesting you to assign this to me. Would like to fix this particular case.

Assigned