Derive Macro Sortable

#[derive(Sortable)]
{
    // Attributes available to this derive:
    #[django]
}

Available on crate feature sort only.

Derive the Sortable trait, creating suitable SorterClass types.

This is only implemented for structs with named fields. No fields will be available to use as sort orders, unless there are annotations to indicate otherwise. The annotations use the django attribute, which has the following significant options here:

• #[django(rename="new_name")] Expose the annotated member for sorting as `new_name instead of using its name in the source code.

• #[django(sort)] The field, which must be [Ord], will be exposed as a sort order for the enclosing type. The ordering is taken directly from [Ord].

• #[django(sort="name","age")] The field has a type which is itself Sortable. Expose this field as defining a sort order of the same name, and When sorting by this field make the order defined by the field’s own member name, and then by its own member age as a secondary sort.