Struct actix_web::dev::Params

pub struct Params<'a>(_);

Route match information

If resource path contains variable patterns, Params stores this variables.

Methods

impl<'a> Params<'a>

pub fn is_empty(&self) -> bool

Check if there are any matched patterns

pub fn len(&self) -> usize

Check number of extracted parameters

pub fn get(&'a self, key: &str) -> Option<&'a str>

Get matched parameter by name without type conversion

pub fn query<T: FromParam>(
    &'a self,
    key: &str
) -> Result<T, <T as FromParam>::Err>

Get matched FromParam compatible parameter by name.

If keyed parameter is not available empty string is used as default value.

fn index(req: HttpRequest) -> Result<String> {
   let ivalue: isize = req.match_info().query("val")?;
   Ok(format!("isuze value: {:?}", ivalue))
}

Important traits for Iter<'a, T>

impl<'a, T> Iterator for Iter<'a, T> type Item = &'a T;

pub fn iter(&self) -> Iter<(Cow<'a, str>, Cow<'a, str>)>

Return iterator to items in parameter container

Trait Implementations

impl<'a> Debug for Params<'a>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'a, 'b, 'c: 'a> Index<&'b str> for &'c Params<'a>

type Output = str

The returned type after indexing.

fn index(&self, name: &'b str) -> &str

Performs the indexing (container[index]) operation.

impl<'a, 'c: 'a> Index<usize> for &'c Params<'a>

type Output = str

The returned type after indexing.

fn index(&self, idx: usize) -> &str

Performs the indexing (container[index]) operation.