extendSchema()

[leebyron]

This new utility function produces a new Schema, provided an existing one and a document containing schema type definitions and extensions.

[jontonsoup]

@leebyron does this enable me to combine two schemas that have already been built?

I tried using it and got this error:

Error: Must provide valid Document AST

Thanks!

[leebyron]

You could print one and then use that to extend the other, but otherwise no. This is for extending a schema for metadata only for use by client tools

[jontonsoup]

@leebyron

so something like this would work?
https://github.com/graphql/graphql-js/blob/master/src/utilities/schemaPrinter.js#L28

printed_schema = printSchema(first_schema)
combined_schema = extendSchema(second_schema, printed_schema)

[leebyron]

You need to parse the printed schema into a document AST first, but yes

[jontonsoup]

@leebyron thanks! Whats the AST parser function?

This one?

graphql-js/src/language/parser.js

Line 122 in 2f10ad4

export function parse(