toolu_orm_core/row/
mod.rs

1//! Row decoding (`FromRow`) and Postgres helpers.
2
3#[cfg(feature = "postgres")]
4mod decode_postgres;
5mod derived;
6#[cfg(feature = "postgres")]
7mod pg_count_scalar;
8mod traits;
9
10#[cfg(feature = "postgres")]
11pub use decode_postgres::from_postgres_row;
12#[cfg(feature = "postgres")]
13pub use pg_count_scalar::PgCountScalar;
14pub use traits::FromRow;
15
16/// Generates feature-gated `FromRow` impls for a type across backend combinations.
17///
18/// Supports single-backend (one `from_row`), dual-backend, and triple-backend shapes.
19#[macro_export]
20macro_rules! impl_from_row_for {
21  (single $cfg:meta, $ty:ty, $cols:expr, $method:ident, $row_ty:ty, $body:expr) => {
22    #[$cfg]
23    impl $crate::row::FromRow for $ty {
24      const REQUIRED_COLUMNS: &'static [&'static str] = $cols;
25      fn $method(row: &$row_ty) -> Result<Self, $crate::error::DbCoreError> {
26        $body(row)
27      }
28    }
29  };
30  (dual $cfg:meta, $ty:ty, $cols:expr,
31    [$m1:ident $r1:ty => $b1:expr],
32    [$m2:ident $r2:ty => $b2:expr]
33  ) => {
34    #[$cfg]
35    impl $crate::row::FromRow for $ty {
36      const REQUIRED_COLUMNS: &'static [&'static str] = $cols;
37      fn $m1(row: &$r1) -> Result<Self, $crate::error::DbCoreError> {
38        $b1(row)
39      }
40      fn $m2(row: &$r2) -> Result<Self, $crate::error::DbCoreError> {
41        $b2(row)
42      }
43    }
44  };
45  (triple $cfg:meta, $ty:ty, $cols:expr,
46    [$m1:ident $r1:ty => $b1:expr],
47    [$m2:ident $r2:ty => $b2:expr],
48    [$m3:ident $r3:ty => $b3:expr]
49  ) => {
50    #[$cfg]
51    impl $crate::row::FromRow for $ty {
52      const REQUIRED_COLUMNS: &'static [&'static str] = $cols;
53      fn $m1(row: &$r1) -> Result<Self, $crate::error::DbCoreError> {
54        $b1(row)
55      }
56      fn $m2(row: &$r2) -> Result<Self, $crate::error::DbCoreError> {
57        $b2(row)
58      }
59      fn $m3(row: &$r3) -> Result<Self, $crate::error::DbCoreError> {
60        $b3(row)
61      }
62    }
63  };
64}
toolu_orm_core/row/mod.rs

toolu_orm_core/row/
mod.rs
