# Struct actix_web::error::Error[−][src]

    pub struct Error { /* fields omitted */ }

General purpose actix web error.

An actix web error is used to carry errors from `failure` or `std::error` through actix in a convenient way. It can be created through converting errors with `into()`.

Whenever it is created from an external object a response error is created for it that can be used to create an http response from it this means that if you have access to an actix `Error` you can always get a `ResponseError` reference from it.

## Methods

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`impl Error`

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`pub fn cause(&self) -> &ResponseError`

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Deprecated since 0.6.0

: please use `Error::as_response_error()` instead

Deprecated way to reference the underlying response error.

####

`pub fn as_fail(&self) -> &Fail`

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Returns a reference to the underlying cause of this `Error` as `Fail`

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`pub fn as_response_error(&self) -> &ResponseError`

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Returns the reference to the underlying `ResponseError`.

####

`pub fn backtrace(&self) -> &Backtrace`

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Returns a reference to the Backtrace carried by this error, if it carries one.

This uses the same `Backtrace` type that `failure` uses.

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`pub fn downcast_ref<T: Fail>(&self) -> Option<&T>`

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Attempts to downcast this `Error` to a particular `Fail` type by reference.

If the underlying error is not of type `T`, this will return `None`.

## Trait Implementations

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`impl Display for Error`

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

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Formats the value using the given formatter. Read more

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`impl Debug for Error`

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

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Formats the value using the given formatter. Read more

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`impl From<Error> for HttpResponse`

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Convert `Error` to a `HttpResponse` instance

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`fn from(err: Error) -> Self`

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Performs the conversion.

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`impl<T: ResponseError> From<T> for Error`

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`Error` for any error that implements `ResponseError`

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`fn from(err: T) -> Error`

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Performs the conversion.

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`impl From<Error> for Error`

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`fn from(err: Error) -> Error`

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Performs the conversion.

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`impl From<Error> for ClientError`

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`fn from(err: Error) -> ClientError`

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Performs the conversion.

## Auto Trait Implementations

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`impl Send for Error`

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`impl Sync for Error`

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