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Conversion from FromSqlError to Error

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Fixes #555
This commit is contained in:
Kornel 2019-08-04 21:24:50 +01:00
parent 3fda4af69b
commit 010794e091
1 changed files with 39 additions and 7 deletions
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46
src/error.rs
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@ -1,4 +1,5 @@
use crate::types::Type;
use crate::types::FromSqlError;
use crate::{errmsg_to_string, ffi};
use std::error;
use std::fmt;
@ -155,6 +156,31 @@ impl From<::std::ffi::NulError> for Error {
}
}
const UNKNOWN_COLUMN: usize = std::usize::MAX;
/// The conversion isn't precise, but it's convenient to have it
/// to allow use of `get_raw(…).as_…()?` in callbacks that take `Error`.
impl From<FromSqlError> for Error {
fn from(err: FromSqlError) -> Error {
// The error type requires index and type fields, but they aren't known in this context.
match err {
FromSqlError::OutOfRange(val) => Error::IntegralValueOutOfRange(UNKNOWN_COLUMN, val),
#[cfg(feature = "i128_blob")]
FromSqlError::InvalidI128Size(s) => {
Error::FromSqlConversionFailure(UNKNOWN_COLUMN, Type::Blob, Box::new(err))
}
#[cfg(feature = "uuid")]
FromSqlError::InvalidUuidSize(s) => {
Error::FromSqlConversionFailure(UNKNOWN_COLUMN, Type::Blob, Box::new(err))
}
FromSqlError::Other(source) => {
Error::FromSqlConversionFailure(UNKNOWN_COLUMN, Type::Null, source)
}
_ => Error::FromSqlConversionFailure(UNKNOWN_COLUMN, Type::Null, Box::new(err)),
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
@ -164,14 +190,20 @@ impl fmt::Display for Error {
f,
"SQLite was compiled or configured for single-threaded use only"
),
Error::FromSqlConversionFailure(i, ref t, ref err) => write!(
f,
"Conversion error from type {} at index: {}, {}",
t, i, err
),
Error::IntegralValueOutOfRange(col, val) => {
Error::FromSqlConversionFailure(i, ref t, ref err) => if i != UNKNOWN_COLUMN {
write!(
f,
"Conversion error from type {} at index: {}, {}",
t, i, err
)
} else {
err.fmt(f)
},
Error::IntegralValueOutOfRange(col, val) => if col != UNKNOWN_COLUMN {
write!(f, "Integer {} out of range at index {}", val, col)
}
} else {
write!(f, "Integer {} out of range", val)
},
Error::Utf8Error(ref err) => err.fmt(f),
Error::NulError(ref err) => err.fmt(f),
Error::InvalidParameterName(ref name) => write!(f, "Invalid parameter name: {}", name),