Trait HandleUpdate 

pub trait HandleUpdate<L, U, DB, Ctx> {
    // Required method
    fn handle_update(
        selection: Option<&[Selection<'_, WundergraphScalarValue>]>,
        executor: &Executor<'_, Ctx, WundergraphScalarValue>,
        update: &U,
    ) -> ExecutionResult<WundergraphScalarValue>;
}

A trait to handle update mutations for database entities

Type parameters:

• Self: database table type for diesel
• U: data to update into the table. This type should contain information which entry should be updated (by containing the primary key) and the data that should be actually updated
• DB: Backend type from diesel, so one of Pg or Sqlite
• Ctx: The used wundergraph context type

A default implementation is provided for all types implementing diesel::AsChangeset

Required Methods

fn handle_update( selection: Option<&[Selection<'_, WundergraphScalarValue>]>, executor: &Executor<'_, Ctx, WundergraphScalarValue>, update: &U, ) -> ExecutionResult<WundergraphScalarValue>

Actual function called to insert a database entity

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<L, U, DB, Ctx, T> HandleUpdate<L, U, DB, Ctx> for T

where T: Table + HasTable<Table = T> + FindDsl<<&'static U as Identifiable>::Id> + 'static + BoxedDsl<'static, DB, Output = BoxedSelectStatement<'static, SqlTypeOf<<T as Table>::AllColumns>, T, DB>>, DB: Backend + ApplyOffset + 'static + HasSqlType<SqlTypeOfPlaceholder<L::FieldList, DB, L::PrimaryKeyIndex, T, Ctx>>, DB::QueryBuilder: Default, T::FromClause: QueryFragment<DB>, L: LoadingHandler<DB, Ctx, Table = T>, L::Columns: BuildOrder<T, DB> + BuildSelect<T, DB, SqlTypeOfPlaceholder<L::FieldList, DB, L::PrimaryKeyIndex, T, Ctx>>, Ctx: WundergraphContext + QueryModifier<L, DB>, Ctx::Connection: Connection<Backend = DB>, L::FieldList: WundergraphFieldList<DB, L::PrimaryKeyIndex, T, Ctx>, <L::Filter as BuildFilter<DB>>::Ret: AppearsOnTable<T>, U: 'static, &'static U: AsChangeset<Target = T> + Identifiable + HasTable<Table = T>, Find<T, <&'static U as Identifiable>::Id>: IntoUpdateTarget<Table = T>, <Find<T, <&'static U as Identifiable>::Id> as IntoUpdateTarget>::WhereClause: QueryFragment<DB>, <&'static U as AsChangeset>::Changeset: QueryFragment<DB>, T::PrimaryKey: EqAll<<&'static U as Identifiable>::Id> + Default, <T::PrimaryKey as EqAll<<&'static U as Identifiable>::Id>>::Output: AppearsOnTable<T> + NonAggregate + QueryFragment<DB>,