Attribute Macro butane::dataresult

#[dataresult]

Attribute macro which generates an implementation of DataResult. Continuing with our blog post example from model, we could create a DataResult with only some of the fields from Post (to avoid fetching all of them in a query).

#[dataresult(Post)]
pub struct PostMetadata {
  pub id: i64,
  pub title: String,
  pub pub_time: Option<NaiveDateTime>,
}

Note that the attribute takes a parameter saying which Model this result is a subset of. Every field named in the DataResult must be present in the Model.