Select three #2518
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Select three #2518
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🎉 Released In 1.1.7 🎉Thank you everyone for the contribution! |
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是否可以通过宏定义实现SelectNine macro_rules! generate_select_structs {
($name:ident, $($generics:ident),+) => {
/// Defines a structure to perform a SELECT operation on two Models
#[derive(Clone, Debug)]
pub struct $name<$($generics),*>
where
$($generics: EntityTrait),*
{
pub(crate) query: SelectStatement,
pub(crate) entity: PhantomData<($($generics),*)>,
}
};
}
// Rust 宏系统不支持 `concat_idents!` 直接在 `macro_rules!` 内使用，
// 这里使用手动展开
generate_select_structs!(SelectTwo, E, F);
generate_select_structs!(SelectThree, E, F, G);
generate_select_structs!(SelectFour, E, F, G, H);
generate_select_structs!(SelectFive, E, F, G, H, I);
generate_select_structs!(SelectSix, E, F, G, H, I, J);
generate_select_structs!(SelectSeven, E, F, G, H, I, J, K);
generate_select_structs!(SelectEight, E, F, G, H, I, J, K, L);
generate_select_structs!(SelectNine, E, F, G, H, I, J, K, L, M);
macro_rules! re_impl_query_trait {
($name:ident, $($generics:ident),+) => {
impl<$($generics),*> QueryTrait for $name<$($generics),*>
where
$($generics: EntityTrait),*
{
type QueryStatement = SelectStatement;
fn query(&mut self) -> &mut Self::QueryStatement {
&mut self.query
}
fn as_query(&self) -> &Self::QueryStatement {
&self.query
}
fn into_query(self) -> Self::QueryStatement {
self.query
}
}
};
}
// 生成 SelectOne ~ SelectNine
re_impl_query_trait!(SelectThree, E, F, G);
re_impl_query_trait!(SelectFour, E, F, G, H);
re_impl_query_trait!(SelectFive, E, F, G, H, I);
re_impl_query_trait!(SelectSix, E, F, G, H, I, J);
re_impl_query_trait!(SelectSeven, E, F, G, H, I, J, K);
re_impl_query_trait!(SelectEight, E, F, G, H, I, J, K, L);
re_impl_query_trait!(SelectNine, E, F, G, H, I, J, K, L, M); |
hjarraya
pushed a commit
to sambaclab/sea-orm
that referenced
this pull request
Apr 29, 2025
* SelectThree * Tests * More tests
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