pub struct Row<'stmt> { /* private fields */ }Expand description
A single result row of a query.
Implementations§
source§impl<'stmt> Row<'stmt>
impl<'stmt> Row<'stmt>
sourcepub fn get_unwrap<I: RowIndex, T: FromSql>(&self, idx: I) -> T
pub fn get_unwrap<I: RowIndex, T: FromSql>(&self, idx: I) -> T
Get the value of a particular column of the result row.
Failure
Panics if calling row.get(idx) would return an error,
including:
- If the underlying SQLite column type is not a valid type as a source
for
T - If the underlying SQLite integral value is outside the range
representable by
T - If
idxis outside the range of columns in the returned query
sourcepub fn get<I: RowIndex, T: FromSql>(&self, idx: I) -> Result<T>
pub fn get<I: RowIndex, T: FromSql>(&self, idx: I) -> Result<T>
Get the value of a particular column of the result row.
Failure
Returns an Error::InvalidColumnType if the underlying SQLite column
type is not a valid type as a source for T.
Returns an Error::InvalidColumnIndex if idx is outside the valid
column range for this row.
Returns an Error::InvalidColumnName if idx is not a valid column
name for this row.
If the result type is i128 (which requires the i128_blob feature to be
enabled), and the underlying SQLite column is a blob whose size is not
16 bytes, Error::InvalidColumnType will also be returned.
sourcepub fn get_ref<I: RowIndex>(&self, idx: I) -> Result<ValueRef<'_>>
pub fn get_ref<I: RowIndex>(&self, idx: I) -> Result<ValueRef<'_>>
Get the value of a particular column of the result row as a ValueRef,
allowing data to be read out of a row without copying.
This ValueRef is valid only as long as this Row, which is enforced by
it’s lifetime. This means that while this method is completely safe,
it can be somewhat difficult to use, and most callers will be better
served by get or get_unwrap.
Failure
Returns an Error::InvalidColumnIndex if idx is outside the valid
column range for this row.
Returns an Error::InvalidColumnName if idx is not a valid column
name for this row.
sourcepub fn get_ref_unwrap<I: RowIndex>(&self, idx: I) -> ValueRef<'_>
pub fn get_ref_unwrap<I: RowIndex>(&self, idx: I) -> ValueRef<'_>
Get the value of a particular column of the result row as a ValueRef,
allowing data to be read out of a row without copying.
This ValueRef is valid only as long as this Row, which is enforced by
it’s lifetime. This means that while this method is completely safe,
it can be difficult to use, and most callers will be better served by
get or get_unwrap.
Failure
Panics if calling row.get_ref(idx) would return an
error, including:
- If
idxis outside the range of columns in the returned query. - If
idxis not a valid column name for this row.
Trait Implementations§
source§impl<'stmt> Debug for Row<'stmt>
impl<'stmt> Debug for Row<'stmt>
Debug Row like an ordered Map<Result<&str>, Result<(Type, ValueRef)>>
with column name as key except that for Type::Blob only its size is
printed (not its content).