# Struct actix_web::Query[−][src]

    pub struct Query<T>(_);

Extract typed information from from the request's query.

## Example

    #[macro_use] extern crate serde_derive;
    use actix_web::{App, Query, http};

    #[derive(Debug, Deserialize)]
    pub enum ResponseType {
       Token,
       Code
    }

    #[derive(Deserialize)]
    pub struct AuthRequest {
       id: u64,
       response_type: ResponseType,
    }

    // use `with` extractor for query info
    // this handler get called only if request's query contains `username` field
    // The correct request for this handler would be `/index.html?id=64&response_type=Code"`
    fn index(info: Query<AuthRequest>) -> String {
        format!("Authorization request for client with id={} and type={:?}!", info.id, info.response_type)
    }

    fn main() {
        let app = App::new().resource(
           "/index.html",
           |r| r.method(http::Method::GET).with(index)); // <- use `with` extractor
    }

## Methods

###

`impl<T> Query<T>`

[src]

####

`pub fn into_inner(self) -> T`

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Deconstruct to a inner value

## Trait Implementations

###

`impl<T: PartialEq> PartialEq for Query<T>`

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####

`fn eq(&self, other: &Query<T>) -> bool`

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This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

####

`fn ne(&self, other: &Query<T>) -> bool`

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This method tests for `!=`.

###

`impl<T: Eq> Eq for Query<T>`

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###

`impl<T: PartialOrd> PartialOrd for Query<T>`

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####

`fn partial_cmp(&self, other: &Query<T>) -> Option<Ordering>`

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This method returns an ordering between `self` and `other` values if one exists. Read more

####

`fn lt(&self, other: &Query<T>) -> bool`

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This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

####

`fn le(&self, other: &Query<T>) -> bool`

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This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

####

`fn gt(&self, other: &Query<T>) -> bool`

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This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

####

`fn ge(&self, other: &Query<T>) -> bool`

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This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

###

`impl<T: Ord> Ord for Query<T>`

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####

`fn cmp(&self, other: &Query<T>) -> Ordering`

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This method returns an `Ordering` between `self` and `other`. Read more

####

`fn max(self, other: Self) -> Self`

1.21.0
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Compares and returns the maximum of two values. Read more

####

`fn min(self, other: Self) -> Self`

1.21.0
[src]

Compares and returns the minimum of two values. Read more

###

`impl<T> Deref for Query<T>`

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#### `type Target = T`

The resulting type after dereferencing.

####
ⓘImportant traits for &'a mut R

### Important traits for &'a mut R

`impl<'a, R> Read for &'a mut R where
R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;`

`fn deref(&self) -> &T`

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Dereferences the value.

###

`impl<T> DerefMut for Query<T>`

[src]

####
ⓘImportant traits for &'a mut R

### Important traits for &'a mut R

`impl<'a, R> Read for &'a mut R where
R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;`

`fn deref_mut(&mut self) -> &mut T`

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Mutably dereferences the value.

###

`impl<T, S> FromRequest<S> for Query<T> where T: DeserializeOwned,`

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#### `type Config = ()`

Configuration for conversion process

#### `type Result = Result<Self, Error>`

Future that resolves to a Self

####

`fn from_request(req: &HttpRequest<S>, _: &Self::Config) -> Self::Result`

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Convert request to a Self

####

`fn extract(req: &HttpRequest<S>) -> Self::Result`

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Convert request to a Self Read more

###

`impl<T: Debug> Debug for Query<T>`

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####

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

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Formats the value using the given formatter. Read more

###

`impl<T: Display> Display for Query<T>`

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####

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

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Formats the value using the given formatter. Read more

## Auto Trait Implementations

###

`impl<T> Send for Query<T> where T: Send,`

###

`impl<T> Sync for Query<T> where T: Sync,`

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