Struct mysql_common::row::Row
source · pub struct Row { /* private fields */ }
Expand description
Client side representation of a MySql row.
It allows you to move column values out of a row with Row::take
method but note that it
makes row incomplete. Calls to from_row_opt
on incomplete row will return
Error::FromRowError
and also numerical indexing on taken columns will panic.
Implementations§
source§impl Row
impl Row
sourcepub fn columns_ref(&self) -> &[Column]
pub fn columns_ref(&self) -> &[Column]
Returns columns of this row.
sourcepub fn as_ref(&self, index: usize) -> Option<&Value>
pub fn as_ref(&self, index: usize) -> Option<&Value>
Returns reference to the value of a column with index index
if it exists and wasn’t taken
by Row::take
method.
Non panicking version of row[usize]
.
sourcepub fn get<T, I>(&self, index: I) -> Option<T>where
T: FromValue,
I: ColumnIndex,
pub fn get<T, I>(&self, index: I) -> Option<T>where
T: FromValue,
I: ColumnIndex,
Will copy value at index index
if it was not taken by Row::take
earlier,
then will convert it to T
.
sourcepub fn get_opt<T, I>(&self, index: I) -> Option<Result<T, FromValueError>>where
T: FromValue,
I: ColumnIndex,
pub fn get_opt<T, I>(&self, index: I) -> Option<Result<T, FromValueError>>where
T: FromValue,
I: ColumnIndex,
Will copy value at index index
if it was not taken by Row::take
or Row::take_opt
earlier, then will attempt convert it to T
. Unlike Row::get
, Row::get_opt
will
allow you to directly handle errors if the value could not be converted to T
.
sourcepub fn take<T, I>(&mut self, index: I) -> Option<T>where
T: FromValue,
I: ColumnIndex,
pub fn take<T, I>(&mut self, index: I) -> Option<T>where
T: FromValue,
I: ColumnIndex,
Will take value of a column with index index
if it exists and wasn’t taken earlier then
will converts it to T
.
sourcepub fn take_opt<T, I>(&mut self, index: I) -> Option<Result<T, FromValueError>>where
T: FromValue,
I: ColumnIndex,
pub fn take_opt<T, I>(&mut self, index: I) -> Option<Result<T, FromValueError>>where
T: FromValue,
I: ColumnIndex,
Will take value of a column with index index
if it exists and wasn’t taken earlier then
will attempt to convert it to T
. Unlike Row::take
, Row::take_opt
will allow you to
directly handle errors if the value could not be converted to T
.
Trait Implementations§
source§impl<S, P> From<RowDeserializer<S, P>> for Row
impl<S, P> From<RowDeserializer<S, P>> for Row
source§fn from(x: RowDeserializer<S, P>) -> Self
fn from(x: RowDeserializer<S, P>) -> Self
impl StructuralPartialEq for Row
Auto Trait Implementations§
impl Freeze for Row
impl RefUnwindSafe for Row
impl Send for Row
impl Sync for Row
impl Unpin for Row
impl UnwindSafe for Row
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