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Specifying Schema

Specifying Schema

The simplest config specifies only schema which points to the source of GraphQL schema.

schema: ./schema.graphql

GraphQL Config can start with a single schema and grow from there.

Multiple Files

GraphQL Config can also assemble multiple modularized schemas into a single GraphQL schema object.

You can specify a list of files:

schema:
  - ./foo.graphql
  - ./bar.graphql
  - ./baz.graphql

Alternatively, you can use a glob pattern to find and include pieces of schema:

schema: ./*.graphql

GraphQL Config looks for those files, reads the files and merges them to produce a GraphQL schema object.

Introspection Result

A very common way to describe a GraphQL schema is to run an introspection query on it and save the resulting output as a JSON file. GraphQL Config can also read these files into schema objects.

schema: ./schema.json

Note that JSON introspection results are parsed for both file validity and for schema validity; if either check fails, an error message will be passed back to the caller.

Endpoint

In case you want to access a running GraphQL server via its endpoint, you can pass its address into the configuration file.

schema: http://localhost:4000/graphql

Environment Variables

It is possible to load definitions from environment variables, with or without fallback values.

schema: ${SCHEMA_FILE:./schema.json}

If you want to define a fallback endpoint you may wrap your value with quotation marks.

schema: ${SCHEMA_ENDPOINT:"http://localhost:4000/graphql"}

Passing Headers

If you need to pass headers in the schema request you can do it this way:

schema:
  - http://localhost:4000/graphql:
      headers:
        Authorization: Token
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Pay special attention to the indentation of the headers block.