[−][src]Trait postgres_query::extract::FromSqlRow
Extract values from a row.
May be derived for struct
s using #[derive(FromSqlRow)]
.
Example
#[derive(FromSqlRow)] struct Person { age: i32, name: String, birthday: Option<Date<String>>, }
Associated Constants
const COLUMN_COUNT: usize
Number of columns required to construct this type.
IMPORTANT: if not set correctly, extractors which depend on this value may produce errors.
Required methods
Loading content...Provided methods
fn from_row_multi<R>(rows: &[R]) -> Result<Vec<Self>, Error> where
R: Row,
R: Row,
Extract values from multiple rows.
Implementors of this trait may override this method to enable optimizations not possible in
from_row
by, for example, only looking up the indices of columns with a specific name
once.
Implementations on Foreign Types
impl<A> FromSqlRow for (A,) where
A: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
impl<A, B> FromSqlRow for (A, B) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
impl<A, B, C> FromSqlRow for (A, B, C) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
impl<A, B, C, D> FromSqlRow for (A, B, C, D) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
impl<A, B, C, D, E> FromSqlRow for (A, B, C, D, E) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
impl<A, B, C, D, E, F> FromSqlRow for (A, B, C, D, E, F) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
impl<A, B, C, D, E, F, G> FromSqlRow for (A, B, C, D, E, F, G) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
G: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
G: for<'a> FromSql<'a> + Display,
impl<A, B, C, D, E, F, G, H> FromSqlRow for (A, B, C, D, E, F, G, H) where
A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
G: for<'a> FromSql<'a> + Display,
H: for<'a> FromSql<'a> + Display,
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A: for<'a> FromSql<'a> + Display,
B: for<'a> FromSql<'a> + Display,
C: for<'a> FromSql<'a> + Display,
D: for<'a> FromSql<'a> + Display,
E: for<'a> FromSql<'a> + Display,
F: for<'a> FromSql<'a> + Display,
G: for<'a> FromSql<'a> + Display,
H: for<'a> FromSql<'a> + Display,
impl<T> FromSqlRow for Option<T> where
T: FromSqlRow,
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T: FromSqlRow,
impl<T, E> FromSqlRow for Result<T, E> where
T: FromSqlRow,
E: From<Error>,
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T: FromSqlRow,
E: From<Error>,
impl<T> FromSqlRow for Box<T> where
T: FromSqlRow,
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T: FromSqlRow,
impl<T> FromSqlRow for Rc<T> where
T: FromSqlRow,
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T: FromSqlRow,
impl<T> FromSqlRow for Arc<T> where
T: FromSqlRow,
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T: FromSqlRow,