graphql-engine

This note is in Hasura.RQL.DDL.Action.

Postgres scalars in action input arguments

It’s very comfortable to be able to reference Postgres scalars in actions input arguments. For example, see the following action mutation:

extend type mutation_root {
  create_user (
    name: String!
    created_at: timestamptz
  ): User
}

The timestamptz is a Postgres scalar. We need to validate the presence of timestamptz type in the Postgres database. So, the ‘resolveAction’ function takes all Postgres scalar types as one of the inputs and returns the set of referred scalars.

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