the trait bound <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Add is not satisfied #1731
Description
- Rust: 1.28-nightly
- Diesel: 1.3.0
- Database: sqlite
- Operating System win 10
diesel = { version = "1.3", default-features = false, features = ["sqlite","chrono"] }
error[E0277]: the trait bound <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Add is not satisfied
--> C:\Users\llxxb.cargo\registry\src\github.com-1ecc6299db9ec823\diesel-1.3.0\src\expression\count.rs:58:39
|
58 | #[derive(Debug, Clone, Copy, QueryId, DieselNumericOps)]
| ^^^^^^^^^^^^^^^^ the trait sql_types::ops::Add is not implemented for <expression::count::CountStar as expression::Expression>::SqlType
|
= help: consider adding a where <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Add bound
= help: see issue #48214
= help: add #![feature(trivial_bounds)] to the crate attributes to enable