Trait diesel::backend::DieselReserveSpecialization
source · pub trait DieselReserveSpecialization { }
Expand description
This is a marker trait which indicates that
diesel may specialize a certain QueryFragment
impl in a later version. If you as a user encounter, where rustc
suggests adding this a bound to a type implementing Backend
consider adding the following bound instead
YourQueryType: QueryFragment<DB>
(the concrete bound
is likely mentioned by rustc as part of a note: …
For any user implementing a custom backend: You likely want to implement
this trait for your custom backend type to opt in the existing QueryFragment
impls in diesel.
As indicated by the i-implement-a-third-party-backend-and-opt-into-breaking-changes
feature
diesel reserves the right to specialize any generic QueryFragment
impl via SqlDialect
in a later minor version release