Do not store empty dictionary when updating PollDTO.custom and PollOptionDTO.custom

[laevandus]

🎯 Goal

Do not store empty dictionary when updating PollDTO.custom and PollOptionDTO.custom because it leads to errors in decoding later

📝 Summary

• Do not set empty dictionary to custom properties
• Fixes errors like below
• This started to happen when I recently added JSON decoding error logs for PollDTO and PollOptionDTO (errors were ignored before)

[NSManagedObjectContext 0x600003520370] [PollOptionDTO.swift:67] [asModel()] > Failed to decode extra data for poll option with id: <9265a0ab-49a7-4d80-9c12-1cc906e71b65>, using default value instead. Error: valueNotFound(Swift.Dictionary<Swift.String, Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Cannot get value of type Dictionary<String, Any> -- found null value instead", underlyingError: nil))

🛠 Implementation

🎨 Showcase

🧪 Manual Testing Notes

N/A

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• Changelog is updated with new localization keys
• New code is covered by unit tests
• Documentation has been updated in the docs-content repo

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
StreamChat	6.98 MB	6.98 MB	0 KB	🟢
StreamChatUI	4.77 MB	4.77 MB	0 KB	🟢

[github-actions]

	1 Message
📖	There seems to be app changes but CHANGELOG wasn't modified. Please include an entry if the PR includes user-facing changes. You can find it at CHANGELOG.md.

Generated by 🚫 Danger

[Stream-SDK-Bot]

SDK Performance

target	metric	benchmark	branch	performance	status
MessageList	Hitches total duration	10 ms	5.01 ms	49.9% 🔼	🟢
	Duration	2.6 s	2.54 s	2.31% 🔼	🟢
	Hitch time ratio	4 ms per s	1.97 ms per s	50.75% 🔼	🟢
	Frame rate	75 fps	78.01 fps	4.01% 🔼	🟢
	Number of hitches	1	0.6	40.0% 🔼	🟢

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
StreamChat	6.98 MB	6.98 MB	0 KB	🟢
StreamChatUI	4.77 MB	4.77 MB	0 KB	🟢

[sonarqubecloud]

Quality Gate passed

Issues
173 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.6% Coverage on New Code
0.1% Duplication on New Code

See analysis details on SonarQube Cloud