Deriving all optional field struct for partial / optional fields selects

[kriswuollett]

The current partial model / optional fields features do not directly support dynamic field masking, because needing to define a struct for each combination is not practical. A commonly used pattern in some systems is field masking, e.g., with the protobuf field masks.

I'm trying to use both the struct_patch or optfield to get a struct with all options that do not rewrap any existing options, but getting what seems to be a macro interaction/ordering error for DerivePartialModel for which I'll post a PR example soon:

error[E0599]: no associated item named `SomeColumnName` found for type `_` in the current scope

More or less the entity struct looks like:

#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
#[sea_orm(table_name = "entity_table_name")]
// #[derive(struct_patch::Patch)]
// #[patch(attribute(derive(Clone, Debug, PartialEq, Eq, DerivePartialModel, FromQueryResult)))]
// #[patch(attribute(sea_orm(entity = "crate::entity_name::Model")))]
#[optfield(pub ModelPartial, attrs = (
    derive(Clone, Debug, PartialEq, Eq, DerivePartialModel, FromQueryResult),
    sea_orm(entity = "Model")
))]
pub struct Model {
    // ...
    some_column_name: String,
    // ...
}

Hopefully this is just an error on my part and wouldn't actually require macro changes in sea-orm?

I know it is probably possible through JsonValue as a work around, but doesn't seem like it should be necessary go through that route.