[−][src]Trait diesel::query_dsl::UpdateAndFetchResults

pub trait UpdateAndFetchResults<Changes, Output>: Connection {
    fn update_and_fetch(&self, changeset: Changes) -> QueryResult<Output>;
}

A trait defining how to update a record and fetch the updated entry on a certain backend.

The only case where it is required to work with this trait is while implementing a new connection type. Otherwise use SaveChangesDsl

For implementing this trait for a custom backend:

  • The Changes generic parameter represents the changeset that should be stored
  • The Output generic parameter represents the type of the response.

Required methods

fn update_and_fetch(&self, changeset: Changes) -> QueryResult<Output>

See the traits documentation.

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Implementors

impl<Changes, Output> UpdateAndFetchResults<Changes, Output> for MysqlConnection where
    Changes: Copy + Identifiable,
    Changes: AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget,
    Changes::Table: FindDsl<Changes::Id>,
    Update<Changes, Changes>: ExecuteDsl<MysqlConnection>,
    Find<Changes::Table, Changes::Id>: LoadQuery<MysqlConnection, Output>, [src]

impl<Changes, Output> UpdateAndFetchResults<Changes, Output> for PgConnection where
    Changes: Copy + AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget,
    Update<Changes, Changes>: LoadQuery<PgConnection, Output>, [src]

impl<Changes, Output> UpdateAndFetchResults<Changes, Output> for SqliteConnection where
    Changes: Copy + Identifiable,
    Changes: AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget,
    Changes::Table: FindDsl<Changes::Id>,
    Update<Changes, Changes>: ExecuteDsl<SqliteConnection>,
    Find<Changes::Table, Changes::Id>: LoadQuery<SqliteConnection, Output>, [src]

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