Trait diesel::sql_types::MaybeNullableType
source · pub trait MaybeNullableType<O> {
type Out: SqlType + TypedExpressionType;
}
Expand description
A type level constructor for maybe nullable types
Constructs either Nullable<O>
(for Self
== is_nullable::IsNullable
)
or O
(for Self
== is_nullable::NotNull
)
Required Associated Types§
sourcetype Out: SqlType + TypedExpressionType
type Out: SqlType + TypedExpressionType
See the trait documentation