Trait diesel::query_dsl::UpdateAndFetchResults

pub trait UpdateAndFetchResults<Changes, Output>: Connection {
    // Required method
    fn update_and_fetch(&mut 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(&mut self, changeset: Changes) -> QueryResult<Output>

See the traits documentation.

Object Safety

This trait is not object safe.

Implementors

impl<'b, Changes, Output> UpdateAndFetchResults<Changes, Output> for MysqlConnection

where Changes: Copy + Identifiable + AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget, Changes::Table: FindDsl<Changes::Id>, Update<Changes, Changes>: ExecuteDsl<MysqlConnection>, Find<Changes::Table, Changes::Id>: LoadQuery<'b, MysqlConnection, Output>, <Changes::Table as Table>::AllColumns: ValidGrouping<()>, <<Changes::Table as Table>::AllColumns as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,

Available on crate feature mysql only.

impl<'b, Changes, Output> UpdateAndFetchResults<Changes, Output> for PgConnection

where Changes: Copy + AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget, Update<Changes, Changes>: LoadQuery<'b, PgConnection, Output>, <Changes::Table as Table>::AllColumns: ValidGrouping<()>, <<Changes::Table as Table>::AllColumns as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,

Available on crate feature postgres only.

impl<'b, Changes, Output> UpdateAndFetchResults<Changes, Output> for SqliteConnection

where Changes: Copy + Identifiable + AsChangeset<Target = <Changes as HasTable>::Table> + IntoUpdateTarget, Changes::Table: FindDsl<Changes::Id>, Update<Changes, Changes>: ExecuteDsl<SqliteConnection>, Find<Changes::Table, Changes::Id>: LoadQuery<'b, SqliteConnection, Output>, <Changes::Table as Table>::AllColumns: ValidGrouping<()>, <<Changes::Table as Table>::AllColumns as ValidGrouping<()>>::IsAggregate: MixedAggregates<No, Output = No>,

Available on crate feature sqlite only.

impl<Changes, Output, M> UpdateAndFetchResults<Changes, Output> for PooledConnection<M>

where M: ManageConnection, M::Connection: UpdateAndFetchResults<Changes, Output>, Self: Connection,

Available on crate feature r2d2 only.