feat(gatsby): allow referencing derived types in schema customization

packages/gatsby/package.json

@@ -93,7 +93,7 @@
     "glob": "^7.2.0",
     "got": "^11.8.2",
     "graphql": "^15.7.2",
-    "graphql-compose": "^9.0.6",
+    "graphql-compose": "^9.0.7",
     "graphql-playground-middleware-express": "^1.7.22",
     "hasha": "^5.2.2",
     "http-proxy": "^1.18.1",

packages/gatsby/src/schema/__tests__/__snapshots__/print.js.snap

@@ -149,9 +149,24 @@ interface ITest implements Node {
 }
 
 type BarChild implements Node @childOf(types: [\\"Test\\"]) @dontInfer {
+  fieldWithArgsAndDescription(
+    \\"\\"\\"This is description\\"\\"\\"
+    withDefault: String = \\"Test\\"
+
+    \\"\\"\\"This is description too\\"\\"\\"
+    withoutDefault: String
+    usingDerivedType: BarChildSortInput
+  ): String
   bar: String
 }
 
+enum BuilderEnum {
+  One
+  Two
+}
+
+scalar BuilderScalar
+
 type Test implements Node @dontInfer {
   foo: Int
 }
@@ -187,6 +202,14 @@ input Baz {
 }
 
 type BarChild implements Node @childOf(types: [\\"Test\\"]) @dontInfer {
+  fieldWithArgsAndDescription(
+    \\"\\"\\"This is description\\"\\"\\"
+    withDefault: String = \\"Test\\"
+
+    \\"\\"\\"This is description too\\"\\"\\"
+    withoutDefault: String
+    usingDerivedType: BarChildSortInput
+  ): String
   bar: String
 }"
 `;
@@ -339,6 +362,13 @@ interface ITest2 implements Node {
 
 union ThisOrThat = AnotherTest | OneMoreTest
 
+enum SDLEnumSimple {
+  One
+  Two
+}
+
+scalar SDLScalar
+
 type Inline {
   foo: Nested
 }
@@ -348,9 +378,24 @@ input Baz {
 }
 
 type BarChild implements Node @childOf(types: [\\"Test\\"]) @dontInfer {
+  fieldWithArgsAndDescription(
+    \\"\\"\\"This is description\\"\\"\\"
+    withDefault: String = \\"Test\\"
+
+    \\"\\"\\"This is description too\\"\\"\\"
+    withoutDefault: String
+    usingDerivedType: BarChildSortInput
+  ): String
   bar: String
 }
 
+enum BuilderEnum {
+  One
+  Two
+}
+
+scalar BuilderScalar
+
 type Test implements Node @dontInfer {
   foo: Int
 }
@@ -532,6 +577,13 @@ interface ITest2 implements Node {
 
 union ThisOrThat = AnotherTest | OneMoreTest
 
+enum SDLEnumSimple {
+  One
+  Two
+}
+
+scalar SDLScalar
+
 type Inline {
   foo: Nested
 }
@@ -546,9 +598,24 @@ type InlineTest implements Node & ITest @childOf(types: [\\"OneMoreTest\\"]) @do
 }
 
 type BarChild implements Node @childOf(types: [\\"Test\\"]) @dontInfer {
+  fieldWithArgsAndDescription(
+    \\"\\"\\"This is description\\"\\"\\"
+    withDefault: String = \\"Test\\"
+
+    \\"\\"\\"This is description too\\"\\"\\"
+    withoutDefault: String
+    usingDerivedType: BarChildSortInput
+  ): String
   bar: String
 }
 
+enum BuilderEnum {
+  One
+  Two
+}
+
+scalar BuilderScalar
+
 type Test implements Node @dontInfer {
   foo: Int
 }

packages/gatsby/src/schema/__tests__/build-schema.js

@@ -36,6 +36,7 @@ jest.mock(`gatsby-cli/lib/reporter`, () => {
     info: jest.fn(),
     warn: jest.fn(),
     error: jest.fn(),
+    panic: jest.fn(console.error),
     activityTimer: () => {
       return {
         start: jest.fn(),
@@ -1395,6 +1396,68 @@ describe(`Build schema`, () => {
         }"
       `)
     })
+
+    it(`Can reference derived types when merging types`, async () => {
+      createTypes(gql`
+        # create initial type composer
+        type TypeCreatedBySourcePlugin implements Node {
+          id: ID!
+          someField: String
+        }
+      `)
+      createTypes([
+        buildInterfaceType({
+          name: `SharedInterface`,
+          fields: {
+            id: `ID!`,
+            child_items: {
+              type: `[SharedInterface]`,
+              args: {
+                // referencing derived type
+                sort: `SharedInterfaceSortInput`,
+              },
+            },
+          },
+          interfaces: [`Node`],
+        }),
+        buildObjectType({
+          name: `TypeCreatedBySourcePlugin`,
+          fields: {
+            id: `ID!`,
+            child_items: {
+              type: `[SharedInterface]`,
+              args: {
+                sort: `SharedInterfaceSortInput`,
+              },
+              resolve: (_, args) => [],
+            },
+          },
+          interfaces: [`Node`, `SharedInterface`],
+        }),
+      ])
+
+      // implicit assertion is that building schema doesn't throw in the process
+      const schema = await buildSchema()
+      expect(printType(schema.getType(`TypeCreatedBySourcePlugin`)))
+        .toMatchInlineSnapshot(`
+        "type TypeCreatedBySourcePlugin implements Node & SharedInterface {
+          id: ID!
+          someField: String
+          child_items(sort: SharedInterfaceSortInput): [SharedInterface]
+          parent: Node
+          children: [Node!]!
+          internal: Internal!
+        }"
+      `)
+
+      expect(printType(schema.getType(`SharedInterfaceSortInput`)))
+        .toMatchInlineSnapshot(`
+        "input SharedInterfaceSortInput {
+          fields: [SharedInterfaceFieldsEnum]
+          order: [SortOrderEnum] = [ASC]
+        }"
+      `)
+    })
   })
 
   it(`allows renaming and merging nested types`, async () => {

packages/gatsby/src/schema/__tests__/print.js

@@ -1,5 +1,9 @@
 const { build } = require(`..`)
-import { buildObjectType } from "../types/type-builders"
+import {
+  buildObjectType,
+  buildEnumType,
+  buildScalarType,
+} from "../types/type-builders"
 const { store } = require(`../../redux`)
 const { actions } = require(`../../redux/actions/restricted`)
 const { actions: publicActions } = require(`../../redux/actions/public`)
@@ -18,6 +22,7 @@ jest.mock(`gatsby-cli/lib/reporter`, () => {
     info: jest.fn(),
     warn: jest.fn(),
     error: jest.fn(),
+    panic: jest.fn(console.error),
     activityTimer: () => {
       return {
         start: jest.fn(),
@@ -98,6 +103,13 @@ describe(`Print type definitions`, () => {
         date: Date @dateformat(formatString: "YYYY")
       }
       union ThisOrThat = AnotherTest | OneMoreTest
+
+      enum SDLEnumSimple {
+        One
+        Two
+      }
+
+      scalar SDLScalar
     `)
     typeDefs.push(
       buildObjectType({
@@ -128,13 +140,42 @@ describe(`Print type definitions`, () => {
         name: `BarChild`,
         fields: {
           id: `ID!`,
+          fieldWithArgsAndDescription: {
+            type: `String`,
+            args: {
+              withDefault: {
+                type: `String`,
+                description: `This is description`,
+                defaultValue: `Test`,
+              },
+              withoutDefault: {
+                type: `String`,
+                description: `This is description too`,
+              },
+              usingDerivedType: `BarChildSortInput`,
+            },
+          },
         },
         interfaces: [`Node`],
         extensions: {
           childOf: {
             types: [`Test`],
           },
         },
+      }),
+      buildEnumType({
+        name: `BuilderEnum`,
+        values: {
+          One: {
+            value: `One`,
+          },
+          Two: {
+            value: `Two`,
+          },
+        },
+      }),
+      buildScalarType({
+        name: `BuilderScalar`,
       })
     )
     store.dispatch({
@@ -152,6 +193,11 @@ describe(`Print type definitions`, () => {
       payload: typeDefs[2],
       plugin: { name: `gatsby-plugin-another-test` },
     })
+    store.dispatch({
+      type: `CREATE_TYPES`,
+      payload: [typeDefs[3], typeDefs[4]],
+      plugin: { name: `gatsby-plugin-shared` },
+    })
   })
 
   it(`saves type definitions to default file`, async () => {