Table field default value 0 or "" isn't interpreted as a default value

[TouhoHH]

When adding a new field to a table that has data and the default value is a number 0 or empty string for the new field, spacetimedb checks if (defaultValue) and refuses to merge because there is no default value.

I found this from the library:

if (meta.defaultValue) {
      const writer = new BinaryWriter(16);
      builder.serialize(writer, meta.defaultValue);
      defaultValues.push({
        colId: colIds.get(name)!,
        value: writer.getBuffer(),
      });
    }

Should check if (meta.defaultValue !== undefined) or something.

[TouhoHH]

Codex solved the issue by having non falsy zero. :D

const DefaultAreaCenter = new Number(0.0) as unknown as number;

[JasonAtClockwork]

Thanks for your report on this! I've added a PR to get this fixed up: #4838