✨ support defining a dimension field as multi-valued

[gbrlcustodio]

Hey @azaurus1, I hope you're doing well!

As we discussed on azaurus1/terraform-provider-pinot#56, this pull request is to add support for the singleValueField property. It requires a boolean to indicate if the field is single-valued or multi-valued.

The only issue I encountered was regarding how the omitempty option works. It states that the field should be excluded from the encoding if it has an empty value, defined as false, 0, a nil pointer, a nil interface value, or any empty array, slice, map, or string.

When both NotNull and SingleValueField are set to false, they are omitted.

To address this issue, I've replaced it with a boolean pointer as this issue has been extensively debated and this seems to be the simpler workaround. Alternatively, we could use a different JSON serializer. There's also a proposal for golang to support this natively, which is almost ten years old. You can find it here.

[azaurus1]

Hi @gbrlcustodio, looks good, I will make this into a release, so you can reference it in the go.mod when you make the changes for terraform-provider-pinot

[azaurus1]

@gbrlcustodio, new release is v0.3.0