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This is a helper method to save (insert / update) ActiveModel into the database.

Save Behaviour#

When saving an ActiveModel, it will perform either insert or update depending on the primary key attribute:

  • Insert if primary key is Unset
  • Update if primary key is Set or Unchanged


Calling save to insert or update an ActiveModel.

let banana = fruit::ActiveModel {    id: Unset(None), // unset primary key explicitly    name: Set("Banana".to_owned()),    ..Default::default() // all other attributes are `Unset`};
// Insert, because primary key `id` is `Unset`let mut banana =; = Set("Banana Mongo".to_owned());
// Update, because primary key `id` is `Set`let banana =;