refactor: improve interfaces and expandAuthor

Author: eug-vs

models/polls/poll.schema.ts

@@ -1,18 +1,23 @@
 import { Document, Schema, Types } from 'mongoose';
+import { User } from '../users/user.schema'
 
 interface ImageData {
   url: string;
   votes: number;
 }
 
-export interface PollSchema extends Document {
-  authorId: string;
+export interface Poll {
+  author: User;
   contents: {
     left: ImageData;
     right: ImageData;
   };
 }
 
+export interface PollSchema extends Document, Omit<Poll, 'author'> {
+  authorId: string;
+}
+
 
 const imageDataSchema = {
   url: String,

models/users/user.schema.ts

@@ -1,11 +1,13 @@
 import { Document, Schema } from "mongoose"
 
-export interface UserSchema extends Document {
+export interface User {
   name: string;
   avatarUrl?: string;
   age?: number;
 }
 
+export interface UserSchema extends Document, User {}
+
 export const userSchema = new Schema({
   name: String,
   avatarUrl: {

services/polls/polls.hooks.ts

@@ -2,20 +2,22 @@ import { HookContext } from '@feathersjs/feathers';
 import bluebird from 'bluebird';
 import _ from 'lodash';
 
-import { PollSchema } from '../../models/polls/poll.schema';
-import { UserSchema } from '../../models/users/user.schema';
+import { Poll, PollSchema } from '../../models/polls/poll.schema';
+import { User } from '../../models/users/user.schema';
 import UserModel from '../../models/users/user.model';
 
 
-interface Poll extends Omit<PollSchema, 'authorId'> {
-  author: UserSchema;
-}
-
 const expandAuthor = async (poll: PollSchema): Promise<Poll | null> => {
-  return UserModel.findById(poll.authorId).then((author: UserSchema | null): Poll | null => {
-    if (author) return _.merge(_.omit(poll, 'authorId'), { author });
-    return null;
-  });
+  return UserModel.findById(poll.authorId)
+    .lean<User>()
+    .exec()
+    .then((author: User | null): Poll | null => {
+      return author && _.merge(_.omit(poll, 'authorId'), { author });
+    })
+    .catch(err => {
+      console.error(err);
+      return err;
+    });
 };
 
 const expandAuthorHook = async (context: HookContext): Promise<HookContext> => {
@@ -24,8 +26,8 @@ const expandAuthorHook = async (context: HookContext): Promise<HookContext> => {
 };
 
 const expandAuthorManyHook = async (context: HookContext): Promise<HookContext> => {
-  context.result = await bluebird.map(context.result, (poll: any) => expandAuthor(poll));
-  console.log(context.result);
+  const polls = await bluebird.map(context.result, (poll: any) => expandAuthor(poll));
+  context.result = _.compact(polls);
   return context;
 };