🐛 Bug Report: Updating Attributes with Null Default Fails

[jaboyc]

👟 Reproduction steps

When I update an attribute using Databases.update#Attribute and pass in null for xdefault,

👍 Expected behavior

It should set the default value of that attribute to null.

👎 Actual Behavior

It actually throws an exception: AppwriteException: general_argument_invalid, Param "default" is not optional. (400)

I've found that modifying https://github.com/appwrite/sdk-for-dart/blob/master/lib/src/client_mixin.dart#L15 to params.removeWhere((key, value) => value == null && key != 'default'); locally fixes the issue. Looks like the default: null header is being removed before sending the http request, which is causing the exception. This does not seem like a good fix for the issue, but it narrows down where the issue is coming from.

🎲 Appwrite version

Version 0.10.x

💻 Operating system

MacOS

🧱 Your Environment

Using this in a CLI script to automatically update my attributes.

👀 Have you spent some time to check if this issue has been raised before?

• [X] I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• [X] I have read the Code of Conduct