GraphQL Nexus Schema (nexusjs) doesn't compile with scalar types - graphql

Question

I am trying to follow the documentation on the Nexus-Schema (nexusjs) website for adding scalar types to my GraphQL application.
I have tried adding many of the different implementations to my src/types/Types.ts file using the samples provided in the documentation and the interactive examples. My attempts include:
Without a 3rd party libraries:
const DateScalar = scalarType({
name: 'Date',
asNexusMethod: 'date',
description: 'Date custom scalar type',
parseValue(value) {
return new Date(value)
},
serialize(value) {
return value.getTime()
},
parseLiteral(ast) {
if (ast.kind === Kind.INT) {
return new Date(ast.value)
}
return null
},
})
With graphql-iso-date 3rd party library:
import { GraphQLDate } from 'graphql-iso-date'
export const DateTime = GraphQLDate
With graphql-scalars 3rd party library (as shown in the ghost example):
export const GQLDate = decorateType(GraphQLDate, {
rootTyping: 'Date',
asNexusMethod: 'date',
})
I am using this new scalar type in an object definition like the following:
const SomeObject = objectType({
name: 'SomeObject',
definition(t) {
t.date('createdAt') // t.date() is supposed to be available because of `asNexusMethod`
},
})
In all cases, these types are exported from the types file and imported into the makeSchema's types property.
import * as types from './types/Types'
console.log("Found types", types)
export const apollo = new ApolloServer({
schema: makeSchema({
types,
...
context:()=>(
...
})
})
The console.log statement above does show that consts declared in the types file are in scope:
Found types {
GQLDate: Date,
...
}
If I run the app in development mode, everything boots up and runs fine.
ts-node-dev --transpile-only ./src/app.ts
However, I encounter errors whenever I try to compile the app to deploy to a server
ts-node ./src/app.ts && tsc
Note: This error occurs occurs running just ts-node ./src/app.ts before it gets to tsc
The errors that shown during the build process are the following:
/Users/user/checkouts/project/node_modules/ts-node/src/index.ts:500
return new TSError(diagnosticText, diagnosticCodes)
^
TSError: ⨯ Unable to compile TypeScript:
src/types/SomeObject.ts:11:7 - error TS2339: Property 'date' does not exist on type 'ObjectDefinitionBlock<"SomeObject">'.
11 t.date('createdAt')
Does anyone have any ideas on either:
a) How can I work around this error? While long-term solutions are ideal, temporary solutions would also be appreciated.
b) Any steps I could follow to debug this error? Or ideas on how get additional information to assist with debugging?
Any assistance would be very much welcomed. Thanks!

Answer 1

The issue seems to be resolved when --transpile-only flag is added to the nexus:reflect command.
This means the reflection command gets updated to:
ts-node --transpile-only ./src/app.ts
and the build comand gets updated to:
env-cmd -f ./config/.env ts-node --transpile-only ./src/app.ts --nexusTypegen && tsc
A github issue has also been created which can be reviewed here: https://github.com/graphql-nexus/schema/issues/690