<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="Possible failures modes for [`SessionStore::update`]."><metaname="keywords"content="rust, rustlang, rust-lang, UpdateError"><title>UpdateError in actix_session::storage - Rust</title><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceSerif4-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../FiraSans-Regular.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../FiraSans-Medium.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceCodePro-Regular.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceSerif4-Bold.ttf.woff2"><linkrel="preload"as="font"type="font/woff2"crossoriginhref="../../SourceCodePro-Semibold.ttf.woff2"><linkrel="stylesheet"href="../../normalize.css"><linkrel="stylesheet"href="../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"href="../../ayu.css"disabled><linkrel="stylesheet"href="../../dark.css"disabled><linkrel="stylesheet"href="../../light.css"id="themeStyle"><scriptid="default-settings"></script><scriptsrc="../../storage.js"></script><scriptdefersrc="sidebar-items.js"></script><scriptdefersrc="../../main.js"></script><noscript><linkrel="stylesheet"href="../../noscript.css"></noscript><linkrel="icon"href="https://actix.rs/favicon.ico"></head><bodyclass="rustdoc enum"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="mobile-topbar"><buttonclass="sidebar-menu-toggle">☰</button><aclass="sidebar-logo"href="../../actix_session/index.html"><divclass="logo-container"><imgsrc="https://actix.rs/img/logo.png"alt="logo"></div></a><h2></h2></nav><navclass="sidebar"><aclass="sidebar-logo"href="../../actix_session/index.html"><divclass="logo-container">
<imgsrc="https://actix.rs/img/logo.png"alt="logo"></div></a><h2class="location"><ahref="#">UpdateError</a></h2><divclass="sidebar-elems"><section><h3><ahref="#variants">Variants</a></h3><ulclass="block"><li><ahref="#variant.Other">Other</a></li><li><ahref="#variant.Serialization">Serialization</a></li></ul><h3><ahref="#trait-implementations">Trait Implementations</a></h3><ulclass="block"><li><ahref="#impl-Debug-for-UpdateError">Debug</a></li><li><ahref="#impl-Display-for-UpdateError">Display</a></li><li><ahref="#impl-Error-for-UpdateError">Error</a></li></ul><h3><ahref="#synthetic-implementations">Auto Trait Implementations</a></h3><ulclass="block"><li><ahref="#impl-RefUnwindSafe-for-UpdateError">!RefUnwindSafe</a></li><li><ahref="#impl-Send-for-UpdateError">Send</a></li><li><ahref="#impl-Sync-for-UpdateError">Sync</a></li><li><ahref="#impl-Unpin-for-UpdateError">Unpin</a></li><li><ahref="#impl-UnwindSafe-for-UpdateError">!UnwindSafe</a></li></ul><h3><ahref="#blanket-implementations">Blanket Implementations</a></h3><ulclass="block"><li><ahref="#impl-Any-for-UpdateError">Any</a></li><li><ahref="#impl-Borrow%3CT%3E-for-UpdateError">Borrow<T></a></li><li><ahref="#impl-BorrowMut%3CT%3E-for-UpdateError">BorrowMut<T></a></li><li><ahref="#impl-From%3CT%3E-for-UpdateError">From<T></a></li><li><ahref="#impl-Instrument-for-UpdateError">Instrument</a></li><li><ahref="#impl-Into%3CU%3E-for-UpdateError">Into<U></a></li><li><ahref="#impl-Provider-for-UpdateError">Provider</a></li><li><ahref="#impl-Same%3CT%3E-for-UpdateError">Same<T></a></li><li><ahref="#impl-ToString-for-UpdateError">ToString</a></li><li><ahref="#impl-TryFrom%3CU%3E-for-UpdateError">TryFrom<U></a></li><li><ahref="#impl-TryInto%3CU%3E-for-UpdateError">TryInto<U></a></li><li><ahref="#impl-VZip%3CV%3E-for-UpdateError">VZip<V></a></li><li><ahref="#impl-WithSubscriber-for-UpdateError">WithSubscriber</a></li></ul></section><h2><ahref="index.html">In actix_session::storage</a></h2></div></nav><main><divclass="width-limiter"><navclass="sub"><formclass="search-form"><divclass="search-container"><span></span><inputclass="search-input"name="search"autocomplete="off"spellcheck="false"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><divid="help-button"title="help"tabindex="-1"><ahref="../../help.html">?</a></div><divid="settings-menu"tabindex="-1"><ahref="../../settings.html"title="settings"><imgwidth="22"height="22"alt="Change settings"src="../../wheel.svg"></a></div></div></form></nav><sectionid="main-content"class="content"><divclass="main-heading"><h1class="fqn">Enum <ahref="../index.html">actix_session</a>::<wbr><ahref="index.html">storage</a>::<wbr><aclass="enum"href="#">UpdateError</a><buttonid="copy-path"onclick="copy_path(this)"title="Copy item path to clipboard"><imgsrc="../../clipboard.svg"width="19"height="18"alt="Copy item path"></button></h1><spanclass="out-of-band"><aclass="srclink"href="../../src/actix_session/storage/interface.rs.html#98-106">source</a> · <aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass="inner">−</span>]</a></span></div><divclass="item-decl"><preclass="rust enum"><code>pub enum UpdateError {
</div></details><h2id="variants"class="variants small-section-header">Variants<ahref="#variants"class="anchor"></a></h2><h3id="variant.Serialization"class="variant small-section-header"><ahref="#variant.Serialization"class="anchor field"></a><code>Serialization(<aclass="struct"href="https://docs.rs/anyhow/1.0.66/anyhow/struct.Error.html"title="struct anyhow::Error">Error</a>)</code></h3><divclass="docblock"><p>Failed to serialize session state.</p>
</div><h3id="variant.Other"class="variant small-section-header"><ahref="#variant.Other"class="anchor field"></a><code>Other(<aclass="struct"href="https://docs.rs/anyhow/1.0.66/anyhow/struct.Error.html"title="struct anyhow::Error">Error</a>)</code></h3><divclass="docblock"><p>Something went wrong when updating the session state.</p>
</div><h2id="trait-implementations"class="small-section-header">Trait Implementations<ahref="#trait-implementations"class="anchor"></a></h2><divid="trait-implementations-list"><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Debug-for-UpdateError"class="impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.html#96">source</a><ahref="#impl-Debug-for-UpdateError"class="anchor"></a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="enum"href="enum.UpdateError.html"title="enum actix_session::storage::UpdateError">UpdateError</a></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt"class="method trait-impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.html#96">source</a><ahref="#method.fmt"class="anchor"></a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt"class="fnname">fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Display-for-UpdateError"class="impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.html#96">source</a><ahref="#impl-Display-for-UpdateError"class="anchor"></a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html"title="trait core::fmt::Display">Display</a> for <aclass="enum"href="enum.UpdateError.html"title="enum actix_session::storage::UpdateError">UpdateError</a></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.fmt-1"class="method trait-impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.html#96">source</a><ahref="#method.fmt-1"class="anchor"></a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt"class="fnname">fmt</a>(&self, _derive_more_display_formatter: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a><'_>) -><aclass="type"href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html"title="type core::fmt::Result">Result</a></h4></section></summary><divclass='docblock'>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"open><summary><sectionid="impl-Error-for-UpdateError"class="impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.html#108-115">source</a><ahref="#impl-Error-for-UpdateError"class="anchor"></a><h3class="code-header">impl <aclass="trait"href="https://doc.rust-lang.org/nightly/core/error/trait.Error.html"title="trait core::error::Error">Error</a> for <aclass="enum"href="enum.UpdateError.html"title="enum actix_session::storage::UpdateError">UpdateError</a></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.source"class="method trait-impl has-srclink"><aclass="srclink rightside"href="../../src/actix_session/storage/interface.rs.
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Instrument-for-UpdateError"class="impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#276">source</a><ahref="#impl-Instrument-for-UpdateError"class="anchor"></a><h3class="code-header">impl<T><aclass="trait"href="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html"title="trait tracing::instrument::Instrument">Instrument</a> for T</h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.instrument"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#82">source</a><ahref="#method.instrument"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.instrument"class="fnname">instrument</a>(self, span: <aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"title="struct tracing::span::Span">Span</a>) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the provided <ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"title="Span"><code>Span</code></a>, returning an
<code>Instrumented</code> wrapper. <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.instrument">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.in_current_span"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#121">source</a><ahref="#method.in_current_span"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.Instrument.html#method.in_current_span"class="fnname">in_current_span</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.Instrumented.html"title="struct tracing::instrument::Instrumented">Instrumented</a><Self></h4></section></summary><divclass='docblock'>Instruments this type with the <ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html#method.current">current</a><ahref="https://docs.rs/tracing/0.1.37/tracing/span/struct.Span.html"><code>Span</code></a>, returning an
</div></details></div></details><detailsclass="rustdoc-toggle implementors-toggle"><summary><sectionid="impl-Provider-for-UpdateError"class="impl has-srclink"><aclass="srclink rightside"href="https://doc.rust-lang.org/nightly/src/core/error.rs.html#197">source</a><ahref="#impl-Provider-for-UpdateError"class="anchor"></a><h3class="code-header">impl<E><aclass="trait"href="https://doc.rust-lang.org/nightly/core/any/trait.Provider.html"title="trait core::any::Provider">Provider</a> for E<spanclass="where fmt-newline">where<br> E: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/error/trait.Error.html"title="trait core::error::Error">Error</a> + ?<aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html"title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><divclass="impl-items"><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.provide-1"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://doc.rust-lang.org/nightly/src/core/error.rs.html#201">source</a><ahref="#method.provide-1"class="anchor"></a><h4class="code-header">fn <ahref="https://doc.rust-lang.org/nightly/core/any/trait.Provider.html#tymethod.provide"class="fnname">provide</a>(&'a self, demand: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/any/struct.Demand.html"title="struct core::any::Demand">Demand</a><'a>)</h4></section></summary><spanclass="item-info"><divclass="stab unstable"><spanclass="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>provide_any</code>)</span></div></span><divclass='docblock'>Data providers should implement this method to provide <em>all</em> values they are able to
<ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.WithDispatch.html"title="WithDispatch"><code>WithDispatch</code></a> wrapper. <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.WithSubscriber.html#method.with_subscriber">Read more</a></div></details><detailsclass="rustdoc-toggle method-toggle"open><summary><sectionid="method.with_current_subscriber"class="method trait-impl has-srclink"><aclass="srclink rightside"href="https://docs.rs/tracing/0.1.37/src/tracing/instrument.rs.html#221">source</a><ahref="#method.with_current_subscriber"class="anchor"></a><h4class="code-header">fn <ahref="https://docs.rs/tracing/0.1.37/tracing/instrument/trait.WithSubscriber.html#method.with_current_subscriber"class="fnname">with_current_subscriber</a>(self) -><aclass="struct"href="https://docs.rs/tracing/0.1.37/tracing/instrument/struct.WithDispatch.html"title="struct tracing::instrument::WithDispatch">WithDispatch</a><Self></h4></section></summary><divclass='docblock'>Attaches the current <ahref="https://docs.rs/tracing/0.1.37/tracing/dispatcher/index.html#setting-the-default-subscriber">default</a><ahref="https://docs.rs/tracing-core/0.1.22/tracing_core/subscriber/trait.Subscriber.html"><code>Subscriber</code></a> to this type, returning a
