fix: better to give new name to Interface rather than user type

Author: nodkz

src/__tests__/integration-discriminators-test.js

@@ -47,7 +47,7 @@ describe('#78 Mongoose and Discriminators', () => {
       `{
         eventFindMany {
           __typename
-          ... on GenericEvent {
+          ... on Event {
             refId
           }
           ... on ClickedLinkEvent {
@@ -62,8 +62,8 @@ describe('#78 Mongoose and Discriminators', () => {
     expect(res).toEqual({
       data: {
         eventFindMany: [
-          { __typename: 'GenericEvent', refId: 'aaa' },
-          { __typename: 'GenericEvent', refId: 'bbb' },
+          { __typename: 'Event', refId: 'aaa' },
+          { __typename: 'Event', refId: 'bbb' },
           { __typename: 'ClickedLinkEvent', kind: 'ClickedLinkEvent', refId: 'ccc', url: 'url1' },
           { __typename: 'ClickedLinkEvent', kind: 'ClickedLinkEvent', refId: 'ddd', url: 'url2' },
         ],

src/composeWithMongooseDiscriminators.js

@@ -83,7 +83,7 @@ function getBaseTCFieldsWithTypes(baseTC: TypeComposer) {
 
 function createDInterface(baseModelTC: DiscriminatorTypeComposer): GraphQLInterfaceType {
   return new GraphQLInterfaceType({
-    name: baseModelTC.getDBaseName(),
+    name: `${baseModelTC.getDBaseName()}Interface`,
 
     resolveType: (value: any) => {
       const childDName = value[baseModelTC.getDKey()];
@@ -147,7 +147,7 @@ export class DiscriminatorTypeComposer extends TypeComposer {
       opts.customizationOptions && opts.customizationOptions.schemaComposer
         ? opts.customizationOptions.schemaComposer
         : schemaComposer;
-    this.setTypeName(`Generic${this.modelName}`);
+    this.setTypeName(this.modelName);
     this.DKeyETC = createAndSetDKeyETC(this, this.discriminators);
 
     reorderFields(this, (this.opts: any).reorderFields, this.discriminatorKey);