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<ol class="chapter"><li class="affix"><a href="index.html">Introduction</a></li><li class="affix"><a href="quickstart.html">Quickstart</a></li><li class="affix"><a href="types/index.html">Type System</a></li><li><a href="types/objects/defining_objects.html"><strong aria-hidden="true">1.</strong> Defining objects</a></li><li><ol class="section"><li><a href="types/objects/complex_fields.html"><strong aria-hidden="true">1.1.</strong> Complex fields</a></li><li><a href="types/objects/using_contexts.html"><strong aria-hidden="true">1.2.</strong> Using contexts</a></li><li><a href="types/objects/error_handling.html"><strong aria-hidden="true">1.3.</strong> Error handling</a></li></ol></li><li><a href="types/other-index.html"><strong aria-hidden="true">2.</strong> Other types</a></li><li><ol class="section"><li><a href="types/enums.html"><strong aria-hidden="true">2.1.</strong> Enums</a></li><li><a href="types/interfaces.html"><strong aria-hidden="true">2.2.</strong> Interfaces</a></li><li><a href="types/input_objects.html"><strong aria-hidden="true">2.3.</strong> Input objects</a></li><li><a href="types/scalars.html"><strong aria-hidden="true">2.4.</strong> Scalars</a></li><li><a href="types/unions.html"><strong aria-hidden="true">2.5.</strong> Unions</a></li></ol></li><li><a href="schema/schemas_and_mutations.html"><strong aria-hidden="true">3.</strong> Schemas and mutations</a></li><li><a href="servers/index.html"><strong aria-hidden="true">4.</strong> Adding A Server</a></li><li><ol class="section"><li><a href="servers/official.html"><strong aria-hidden="true">4.1.</strong> Official Server Integrations</a></li><li><ol class="section"><li><a href="servers/warp.html"><strong aria-hidden="true">4.1.1.</strong> Warp</a></li><li><a href="servers/rocket.html"><strong aria-hidden="true">4.1.2.</strong> Rocket</a></li><li><a href="servers/iron.html"><strong aria-hidden="true">4.1.3.</strong> Iron</a></li><li><a href="servers/hyper.html"><strong aria-hidden="true">4.1.4.</strong> Hyper</a></li></ol></li><li><a href="servers/third-party.html"><strong aria-hidden="true">4.2.</strong> Third Party Integrations</a></li></ol></li><li><a href="advanced/index.html"><strong aria-hidden="true">5.</strong> Advanced Topics</a></li><li><ol class="section"><li><a href="advanced/introspection.html"><strong aria-hidden="true">5.1.</strong> Introspection</a></li><li><a href="advanced/non_struct_objects.html"><strong aria-hidden="true">5.2.</strong> Non-struct objects</a></li><li><a href="advanced/objects_and_generics.html"><strong aria-hidden="true">5.3.</strong> Objects and generics</a></li><li><a href="advanced/multiple_ops_per_request.html"><strong aria-hidden="true">5.4.</strong> Multiple operations per request</a></li><li><a href="advanced/dataloaders.html"><strong aria-hidden="true">5.5.</strong> Dataloaders</a></li></ol></li></ol>
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<h1 class="menu-title">Juniper - GraphQL Server for Rust</h1>
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<a class="header" href="#juniper" id="juniper"><h1>Juniper</h1></a>
<p>Juniper is a <a href="http://graphql.org">GraphQL</a> server library for Rust. Build type-safe and fast API
servers with minimal boilerplate and configuration.</p>
<p><a href="http://graphql.org">GraphQL</a> is a data query language developed by Facebook intended to
serve mobile and web application frontends.</p>
<p><em>Juniper</em> makes it possible to write GraphQL servers in Rust that are
type-safe and blazingly fast. We also try to make declaring and resolving
GraphQL schemas as convenient as possible as Rust will allow.</p>
<p>Juniper does not include a web server - instead it provides building blocks to
make integration with existing servers straightforward. It optionally provides a
pre-built integration for the <a href="https://hyper.rs">Hyper</a>, <a href="http://ironframework.io">Iron</a>, <a href="https://rocket.rs">Rocket</a>, and <a href="https://github.com/seanmonstar/warp">Warp</a> frameworks, including
embedded <a href="https://github.com/graphql/graphiql">Graphiql</a> for easy debugging.</p>
<ul>
<li><a href="https://crates.io/crates/juniper">Cargo crate</a></li>
<li><a href="https://docs.rs/juniper">API Reference</a></li>
</ul>
<a class="header" href="#features" id="features"><h2>Features</h2></a>
<p>Juniper supports the full GraphQL query language according to the
<a href="http://facebook.github.io/graphql">specification</a>, including interfaces, unions, schema
introspection, and validations.
It does not, however, support the schema language.</p>
<p>As an exception to other GraphQL libraries for other languages, Juniper builds
non-null types by default. A field of type <code>Vec<Episode></code> will be converted into
<code>[Episode!]!</code>. The corresponding Rust type for e.g. <code>[Episode]</code> would be
<code>Option<Vec<Option<Episode>>></code>.</p>
<a class="header" href="#integrations" id="integrations"><h2>Integrations</h2></a>
<a class="header" href="#data-types" id="data-types"><h3>Data types</h3></a>
<p>Juniper has automatic integration with some very common Rust crates to make
building schemas a breeze. The types from these crates will be usable in
your Schemas automatically.</p>
<ul>
<li><a href="https://crates.io/crates/uuid">uuid</a></li>
<li><a href="https://crates.io/crates/url">url</a></li>
<li><a href="https://crates.io/crates/chrono">chrono</a></li>
<li><a href="https://crates.io/crates/bson">bson</a></li>
</ul>
<a class="header" href="#web-frameworks" id="web-frameworks"><h3>Web Frameworks</h3></a>
<ul>
<li><a href="https://hyper.rs">hyper</a></li>
<li><a href="https://rocket.rs">rocket</a></li>
<li><a href="http://ironframework.io">iron</a></li>
<li><a href="https://github.com/seanmonstar/warp">warp</a></li>
</ul>
<a class="header" href="#api-stability" id="api-stability"><h2>API Stability</h2></a>
<p>Juniper has not reached 1.0 yet, thus some API instability should be expected.</p>
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