2021-07-13 17:19:39 +08:00
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#[macro_export]
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macro_rules! impl_sql_binary_expression {
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($target:ident) => {
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impl diesel::serialize::ToSql<diesel::sql_types::Binary, diesel::sqlite::Sqlite>
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for $target
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{
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fn to_sql<W: std::io::Write>(
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&self,
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out: &mut diesel::serialize::Output<W, diesel::sqlite::Sqlite>,
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) -> diesel::serialize::Result {
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let bytes: Vec<u8> = self.try_into().map_err(|e| format!("{:?}", e))?;
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diesel::serialize::ToSql::<
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2021-07-14 21:12:52 +08:00
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diesel::sql_types::Binary,
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diesel::sqlite::Sqlite,
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>::to_sql(&bytes, out)
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2021-07-13 17:19:39 +08:00
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// match self.try_into() {
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// Ok(bytes) => diesel::serialize::ToSql::<
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// diesel::sql_types::Binary,
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// diesel::sqlite::Sqlite,
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// >::to_sql(&bytes, out),
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// Err(e) => {
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// log::error!(
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// "{:?} serialize to bytes fail. {:?}",
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// std::any::type_name::<$target>(),
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// e
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// );
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// panic!();
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// },
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// }
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}
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}
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// https://docs.diesel.rs/src/diesel/sqlite/types/mod.rs.html#30-33
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// impl FromSql<sql_types::Binary, Sqlite> for *const [u8] {
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// fn from_sql(bytes: Option<&SqliteValue>) -> deserialize::Result<Self> {
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// let bytes = not_none!(bytes).read_blob();
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// Ok(bytes as *const _)
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// }
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// }
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impl<DB> diesel::deserialize::FromSql<diesel::sql_types::Binary, DB> for $target
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where
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DB: diesel::backend::Backend,
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*const [u8]: diesel::deserialize::FromSql<diesel::sql_types::Binary, DB>,
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{
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fn from_sql(bytes: Option<&DB::RawValue>) -> diesel::deserialize::Result<Self> {
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let slice_ptr = <*const [u8] as diesel::deserialize::FromSql<
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diesel::sql_types::Binary,
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DB,
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>>::from_sql(bytes)?;
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let bytes = unsafe { &*slice_ptr };
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match $target::try_from(bytes) {
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Ok(object) => Ok(object),
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Err(e) => {
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log::error!(
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"{:?} deserialize from bytes fail. {:?}",
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std::any::type_name::<$target>(),
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e
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);
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panic!();
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},
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}
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}
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}
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};
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}
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