fix(code-first): Use base model field options with ResolveField()

Author: mattleff

packages/apollo/tests/code-first/recipes/ingredients.resolver.ts

@@ -0,0 +1,20 @@
+import { ID, ResolveField, Resolver, Parent } from '@nestjs/graphql';
+import { Ingredient } from './models/ingredient';
+
+@Resolver((of) => Ingredient)
+export class IngredientsResolver {
+  @ResolveField(() => ID)
+  id(@Parent() { id }: Ingredient): string {
+    return id;
+  }
+
+  @ResolveField()
+  name(@Parent() { name }: Ingredient): string {
+    return name;
+  }
+
+  @ResolveField()
+  baseName(@Parent() { name }: Ingredient): string {
+    return name;
+  }
+}

packages/apollo/tests/code-first/recipes/models/ingredient.ts

@@ -1,9 +1,28 @@
 import { Field, ID, ObjectType } from '@nestjs/graphql';
-@ObjectType()
-export class Ingredient {
-  @Field((type) => ID)
+
+class NodeIngredient {
+  // This does not apply since the class is not decorated with the @ObjectType decorator
+  @Field((type) => ID, {
+    defaultValue: 'Not applied',
+    description: 'Not applied',
+    deprecationReason: 'Not applied',
+  })
   id: string;
+}
+
+@ObjectType({ isAbstract: true })
+class BaseIngredient extends NodeIngredient {
+  @Field({
+    defaultValue: 'default',
+    deprecationReason: 'is deprecated',
+    description: 'ingredient base name',
+    nullable: true,
+  })
+  baseName: string;
+}
 
+@ObjectType()
+export class Ingredient extends BaseIngredient {
   @Field({
     defaultValue: 'default',
     deprecationReason: 'is deprecated',
@@ -13,6 +32,7 @@ export class Ingredient {
   name: string;
 
   constructor(ingredient: Partial<Ingredient>) {
+    super();
     Object.assign(this, ingredient);
   }
 }

packages/apollo/tests/code-first/recipes/recipes.module.ts

@@ -2,12 +2,14 @@ import { Module } from '@nestjs/common';
 import { APP_FILTER } from '@nestjs/core';
 import { UnauthorizedFilter } from '../common/filters/unauthorized.filter';
 import { DateScalar } from '../common/scalars/date.scalar';
+import { IngredientsResolver } from './ingredients.resolver';
 import { IRecipesResolver } from './irecipes.resolver';
 import { RecipesResolver } from './recipes.resolver';
 import { RecipesService } from './recipes.service';
 
 @Module({
   providers: [
+    IngredientsResolver,
     RecipesResolver,
     IRecipesResolver,
     RecipesService,

packages/apollo/tests/e2e/code-first-schema.spec.ts

@@ -17,6 +17,7 @@ import { DirectionsResolver } from '../code-first/directions/directions.resolver
 import { SampleOrphanedEnum } from '../code-first/enums/sample-orphaned.enum';
 import { AbstractResolver } from '../code-first/other/abstract.resolver';
 import { SampleOrphanedType } from '../code-first/other/sample-orphaned.type';
+import { IngredientsResolver } from '../code-first/recipes/ingredients.resolver';
 import { IRecipesResolver } from '../code-first/recipes/irecipes.resolver';
 import { Recipe } from '../code-first/recipes/models/recipe';
 import { RecipesResolver } from '../code-first/recipes/recipes.resolver';
@@ -48,6 +49,7 @@ describe('Code-first - schema factory', () => {
     beforeAll(async () => {
       schema = await schemaFactory.create(
         [
+          IngredientsResolver,
           RecipesResolver,
           DirectionsResolver,
           AbstractResolver,
@@ -212,6 +214,18 @@ describe('Code-first - schema factory', () => {
                 ofType: null,
               },
             },
+            {
+              args: [],
+              deprecationReason: 'is deprecated',
+              description: 'ingredient base name',
+              isDeprecated: true,
+              name: 'baseName',
+              type: {
+                kind: TypeKind.SCALAR,
+                name: 'String',
+                ofType: null,
+              },
+            },
           ]),
         }),
       );

packages/apollo/tests/utils/printed-schema.snapshot.ts

@@ -40,17 +40,19 @@ type SampleOrphanedType {
   averageRating: Float!
 }
 
-type Category {
-  name: String!
-  description: String!
-  tags: [String!]!
-}
-
 type Ingredient {
-  id: ID!
+  """ingredient base name"""
+  baseName: String @deprecated(reason: "is deprecated")
 
   """ingredient name"""
   name: String @deprecated(reason: "is deprecated")
+  id: ID!
+}
+
+type Category {
+  name: String!
+  description: String!
+  tags: [String!]!
 }
 
 """orphaned enum"""
@@ -141,6 +143,8 @@ interface IRecipe {
 }
 
 type Ingredient {
+  """ingredient base name"""
+  baseName: String @deprecated(reason: "is deprecated")
   id: ID!
 
   """ingredient name"""

packages/graphql/lib/schema-builder/storages/type-metadata.storage.ts

@@ -338,24 +338,8 @@ export class TypeMetadataStorageHost {
   }
 
   private compileExternalFieldResolverMetadata(item: FieldResolverMetadata) {
-    const objectTypeRef = this.metadataByTargetCollection
-      .get(item.target)
-      .resolver.typeFn();
-
-    const objectOrInterfaceTypeMetadata =
-      this.metadataByTargetCollection.get(objectTypeRef).objectType ||
-      this.metadataByTargetCollection.get(objectTypeRef).interface;
-
-    if (!objectOrInterfaceTypeMetadata) {
-      throw new CannotDetermineHostTypeError(
-        item.schemaName,
-        objectTypeRef?.name,
-      );
-    }
-    const objectOrInterfaceTypeField =
-      objectOrInterfaceTypeMetadata.properties.find(
-        (fieldDef) => fieldDef.name === item.methodName,
-      );
+    const [target, objectOrInterfaceTypeMetadata, objectOrInterfaceTypeField] =
+      this.findModelFieldMetadata(item);
     if (!objectOrInterfaceTypeField) {
       if (!item.typeFn || !item.typeOptions) {
         throw new UndefinedTypeError(item.target.name, item.methodName);
@@ -366,7 +350,7 @@ export class TypeMetadataStorageHost {
         deprecationReason: item.deprecationReason,
         description: item.description,
         typeFn: item.typeFn,
-        target: objectTypeRef,
+        target,
         options: item.typeOptions,
         methodArgs: item.methodArgs,
         directives: item.directives,
@@ -394,6 +378,49 @@ export class TypeMetadataStorageHost {
     }
   }
 
+  private findModelFieldMetadata(
+    item: FieldResolverMetadata,
+  ): [Function, ClassMetadata, PropertyMetadata | undefined] {
+    let objectTypeRef = this.metadataByTargetCollection
+      .get(item.target)
+      .resolver.typeFn();
+    const getTypeMetadata = (target: any) => {
+      const metadata = this.metadataByTargetCollection.get(target);
+      return metadata.objectType || metadata.interface;
+    };
+    let objectOrInterfaceTypeMetadata = getTypeMetadata(objectTypeRef);
+    if (!objectOrInterfaceTypeMetadata) {
+      throw new CannotDetermineHostTypeError(
+        item.schemaName,
+        objectTypeRef?.name,
+      );
+    }
+    let objectOrInterfaceTypeField =
+      objectOrInterfaceTypeMetadata.properties.find(
+        (fieldDef) => fieldDef.name === item.methodName,
+      );
+    for (
+      let _objectTypeRef = objectTypeRef;
+      !objectOrInterfaceTypeField && _objectTypeRef?.prototype;
+      _objectTypeRef = Object.getPrototypeOf(_objectTypeRef)
+    ) {
+      const possibleTypeMetadata = getTypeMetadata(_objectTypeRef);
+      objectOrInterfaceTypeField = possibleTypeMetadata?.properties.find(
+        (fieldDef) => fieldDef.name === item.methodName,
+      );
+      if (objectOrInterfaceTypeField) {
+        objectTypeRef = _objectTypeRef;
+        objectOrInterfaceTypeMetadata = possibleTypeMetadata;
+        break;
+      }
+    }
+    return [
+      objectTypeRef,
+      objectOrInterfaceTypeMetadata,
+      objectOrInterfaceTypeField,
+    ];
+  }
+
   private compileExtendedResolversMetadata() {
     this.metadataByTargetCollection.all.resolver.forEach((item) => {
       let parentClass = Object.getPrototypeOf(item.target);