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breaking: fix name collision in
FromRow, return `Error::ColumnDecod…
…e` for `TryFrom` errors (launchbadge#3356) * chore: create regression test for launchbadge#3344 * fix(derives): use a parameter name that's less likely to collide * breaking(derives): emit `Error::ColumnDecode` when a `TryFrom` conversion fails in `FromRow` Breaking because `#[sqlx(default)]` on an individual field or the struct itself would have previously suppressed the error. This doesn't seem like good behavior as it could result in some potentially very difficult bugs. Instead of using `TryFrom` for these fields, just implement `From` and apply the default explicitly. * fix: run `cargo fmt` * fix: use correct field in `ColumnDecode`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| use std::any::Any; | ||
| use std::error::Error; | ||
| use std::fmt::{Debug, Display}; | ||
|
|
||
| // Autoderef specialization similar to `clap::value_parser!()`. | ||
| pub struct SpecErrorWrapper<E>(pub E); | ||
|
|
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| pub trait SpecError<E>: Sized { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static>; | ||
| } | ||
|
|
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| impl<E> SpecError<E> for &&&&SpecErrorWrapper<E> | ||
| where | ||
| E: Error + Send + Sync + 'static, | ||
| { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static> { | ||
| |e| Box::new(e.0) | ||
| } | ||
| } | ||
|
|
||
| impl<E> SpecError<E> for &&&SpecErrorWrapper<E> | ||
| where | ||
| E: Display, | ||
| { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static> { | ||
| |e| e.0.to_string().into() | ||
| } | ||
| } | ||
|
|
||
| impl<E> SpecError<E> for &&SpecErrorWrapper<E> | ||
| where | ||
| E: Debug, | ||
| { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static> { | ||
| |e| format!("{:?}", e.0).into() | ||
| } | ||
| } | ||
|
|
||
| impl<E> SpecError<E> for &SpecErrorWrapper<E> | ||
| where | ||
| E: Any, | ||
| { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static> { | ||
| |_e| format!("unprintable error: {}", std::any::type_name::<E>()).into() | ||
| } | ||
| } | ||
|
|
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| impl<E> SpecError<E> for SpecErrorWrapper<E> { | ||
| fn __sqlx_spec_error( | ||
| &self, | ||
| ) -> fn(SpecErrorWrapper<E>) -> Box<dyn Error + Send + Sync + 'static> { | ||
| |_e| "unprintable error: (unprintable type)".into() | ||
| } | ||
| } | ||
|
|
||
| #[doc(hidden)] | ||
| #[macro_export] | ||
| macro_rules! __spec_error { | ||
| ($e:expr) => {{ | ||
| use $crate::spec_error::{SpecError, SpecErrorWrapper}; | ||
|
|
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| let wrapper = SpecErrorWrapper($e); | ||
| let wrap_err = wrapper.__sqlx_spec_error(); | ||
| wrap_err(wrapper) | ||
| }}; | ||
| } | ||
|
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| #[test] | ||
| fn test_spec_error() { | ||
| #[derive(Debug)] | ||
| struct DebugError; | ||
|
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| struct AnyError; | ||
|
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| let _e: Box<dyn Error + Send + Sync + 'static> = | ||
| __spec_error!(std::io::Error::from(std::io::ErrorKind::Unsupported)); | ||
|
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| let _e: Box<dyn Error + Send + Sync + 'static> = __spec_error!("displayable error"); | ||
|
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| let _e: Box<dyn Error + Send + Sync + 'static> = __spec_error!(DebugError); | ||
|
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| let _e: Box<dyn Error + Send + Sync + 'static> = __spec_error!(AnyError); | ||
|
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| let _e: Box<dyn Error + Send + Sync + 'static> = __spec_error!(&1i32); | ||
| } |
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