Struct ParamList 

pub struct ParamList { /* private fields */ }

A list of named parameters that can be used in query execution.

This is a convenience wrapper around Vec<NamedParam> that implements additional utility methods.

Implementations

impl ParamList

pub fn new() -> Self

Create a new empty parameter list.

pub fn with_capacity(capacity: usize) -> Self

Create a parameter list with the given capacity.

pub fn push(&mut self, param: NamedParam)

Add a parameter to the list.

pub fn add<S: Into<String>, T: ToSql>( &mut self, name: S, value: &T, ) -> Result<(), TypeError>

Add a parameter by name and value.

pub fn as_slice(&self) -> &[NamedParam]

Get the parameters as a slice.

pub fn len(&self) -> usize

Get the number of parameters.

pub fn is_empty(&self) -> bool

Check if the list is empty.

pub fn iter(&self) -> impl Iterator<Item = &NamedParam>

Iterate over the parameters.

Trait Implementations

impl Clone for ParamList

fn clone(&self) -> ParamList

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParamList

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ParamList

fn default() -> ParamList

Returns the “default value” for a type.

impl From<Vec<NamedParam>> for ParamList

fn from(params: Vec<NamedParam>) -> Self

Converts to this type from the input type.

impl FromIterator<NamedParam> for ParamList

fn from_iter<I: IntoIterator<Item = NamedParam>>(iter: I) -> Self

Creates a value from an iterator.

impl<'a> IntoIterator for &'a ParamList

type Item = &'a NamedParam

The type of the elements being iterated over.

type IntoIter = Iter<'a, NamedParam>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for ParamList

type Item = NamedParam

The type of the elements being iterated over.

type IntoIter = IntoIter<NamedParam>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.