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Impl TryGetableMany for diffrent types of generices

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This commit is contained in:
Muhannad Alrusayni 2021-09-17 21:59:38 +03:00
parent 28b7542ca9
commit 56dd19ef75
1 changed files with 30 additions and 9 deletions
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39
src/executor/query.rs
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@ -314,29 +314,50 @@ where
}
}
impl<T> TryGetableMany for (T, T)
impl<A, B> TryGetableMany for (A, B)
where
T: TryGetable,
A: TryGetable,
B: TryGetable,
{
fn try_get_many(res: &QueryResult, pre: &str, cols: &[String]) -> Result<Self, TryGetError> {
try_get_many_with_slice_len_of(2, cols)?;
Ok((
T::try_get(res, pre, &cols[0])?,
T::try_get(res, pre, &cols[1])?,
A::try_get(res, pre, &cols[0])?,
B::try_get(res, pre, &cols[1])?,
))
}
}
impl<T> TryGetableMany for (T, T, T)
impl<A, B, C> TryGetableMany for (A, B, C)
where
T: TryGetable,
A: TryGetable,
B: TryGetable,
C: TryGetable,
{
fn try_get_many(res: &QueryResult, pre: &str, cols: &[String]) -> Result<Self, TryGetError> {
try_get_many_with_slice_len_of(3, cols)?;
Ok((
T::try_get(res, pre, &cols[0])?,
T::try_get(res, pre, &cols[1])?,
T::try_get(res, pre, &cols[2])?,
A::try_get(res, pre, &cols[0])?,
B::try_get(res, pre, &cols[1])?,
C::try_get(res, pre, &cols[2])?,
))
}
}
impl<A, B, C, D> TryGetableMany for (A, B, C, D)
where
A: TryGetable,
B: TryGetable,
C: TryGetable,
D: TryGetable,
{
fn try_get_many(res: &QueryResult, pre: &str, cols: &[String]) -> Result<Self, TryGetError> {
try_get_many_with_slice_len_of(4, cols)?;
Ok((
A::try_get(res, pre, &cols[0])?,
B::try_get(res, pre, &cols[1])?,
C::try_get(res, pre, &cols[2])?,
D::try_get(res, pre, &cols[3])?,
))
}
}