106 lines
4.1 KiB
Markdown
106 lines
4.1 KiB
Markdown
<img src="https://github.com/graphql-rust/juniper/blob/master/assets/logo/juniper-dark-word.png" alt="Juniper" width="500" />
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> GraphQL server library for Rust
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[](https://travis-ci.org/graphql-rust/juniper)
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[](https://ci.appveyor.com/project/theduke/juniper)
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[](https://codecov.io/gh/graphql-rust/juniper)
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[](https://crates.io/crates/juniper)
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[](https://gitter.im/juniper-graphql)
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---
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[GraphQL][graphql] is a data query language developed by Facebook intended to
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serve mobile and web application frontends.
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*Juniper* makes it possible to write GraphQL servers in Rust that are
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type-safe and blazingly fast. We also try to make declaring and resolving
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GraphQL schemas as convenient as possible as Rust will allow.
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Juniper does not include a web server - instead it provides building blocks to
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make integration with existing servers straightforward. It optionally provides a
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pre-built integration for the [Hyper][hyper], [Iron][iron], and [Rocket] frameworks, including
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embedded [Graphiql][graphiql] for easy debugging.
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* [Cargo crate](https://crates.io/crates/juniper)
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* [API Reference][docsrs]
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* [Book][book]: Guides and Examples
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## Getting Started
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The best place to get started is the [Juniper Book][book], which contains
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guides with plenty of examples, covering all features of Juniper. (very much WIP)
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To get started quickly and get a feel for Juniper, check out the
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[Quickstart][book_quickstart] section.
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For specific information about macros, types and the Juniper api, the
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[API Reference][docsrs] is the best place to look.
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You can also check out [src/tests/schema.rs][test_schema_rs] to see a complex
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schema including polymorphism with traits and interfaces.
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For an example of web framework integration,
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see the [hyper][hyper_examples], [rocket][rocket_examples], and [iron][iron_examples] examples folders.
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## Features
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Juniper supports the full GraphQL query language according to the
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[specification][graphql_spec], including interfaces, unions, schema
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introspection, and validations.
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It does not, however, support the schema language.
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As an exception to other GraphQL libraries for other languages, Juniper builds
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non-null types by default. A field of type `Vec<Episode>` will be converted into
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`[Episode!]!`. The corresponding Rust type for e.g. `[Episode]` would be
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`Option<Vec<Option<Episode>>>`.
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## Integrations
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### Data types
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Juniper has automatic integration with some very common Rust crates to make
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building schemas a breeze. The types from these crates will be usable in
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your Schemas automatically.
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* [uuid][uuid]
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* [url][url]
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* [chrono][chrono]
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### Web Frameworks
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* [hyper][hyper]
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* [rocket][rocket]
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* [iron][iron]
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## Guides & Examples
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* [Juniper + actix-web example](https://github.com/actix/examples/tree/master/juniper)
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## API Stability
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Juniper has not reached 1.0 yet, thus some API instability should be expected.
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[graphql]: http://graphql.org
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[graphiql]: https://github.com/graphql/graphiql
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[iron]: http://ironframework.io
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[graphql_spec]: http://facebook.github.io/graphql
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[test_schema_rs]: https://github.com/graphql-rust/juniper/blob/master/juniper/src/tests/schema.rs
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[tokio]: https://github.com/tokio-rs/tokio
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[hyper_examples]: https://github.com/graphql-rust/juniper/tree/master/hyper_rocket/examples
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[rocket_examples]: https://github.com/graphql-rust/juniper/tree/master/juniper_rocket/examples
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[iron_examples]: https://github.com/graphql-rust/juniper/tree/master/juniper_iron/examples
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[Hyper]: https://hyper.rs
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[Rocket]: https://rocket.rs
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[book]: https://graphql-rust.github.io
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[book_quickstart]: https://graphql-rust.github.io/quickstart.html
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[docsrs]: https://docs.rs/juniper
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[uuid]: https://crates.io/crates/uuid
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[url]: https://crates.io/crates/url
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[chrono]: https://crates.io/crates/chrono
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