This library is a full implementation of Facebook's GraphQL specification.

Lacinia should be viewed as roughly analogous to the official reference JavaScript implementation. In other words, it is a backend-agnostic GraphQL query execution engine. Lacinia is not an Object Relational Mapper ... it's simply the implementation of a contract sitting between the GraphQL client and your data.

Lacinia features:

• An EDN-based schema language, or use GraphQL's Interface Definition Language.
• High performance parser for GraphQL queries, built on Antlr4.
• Efficient and asynchronous query execution.
• Full support for GraphQL types, interfaces, unions, enums, input objects, and custom scalars.
• Union types in SDL now support an optional leading vertical bar (|) before the first member, following the GraphQL specification. For example:

  union Searchable =
    | Business
    | Employee

• Full support for GraphQL subscriptions.
• Full support of inline and named query fragments.
• Full support for GraphQL Schema Introspection.