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nextjs typegraphql apollo server micro
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5 files changed

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‎src/models/post.model.ts

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import {
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getModelForClass,
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ModelOptions,
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prop,
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Severity,
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} from '@typegoose/typegoose';
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import type { Ref } from '@typegoose/typegoose';
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import { User } from './user.model';
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@ModelOptions({
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schemaOptions: {
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timestamps: true,
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},
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options: {
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allowMixed: Severity.ALLOW,
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},
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})
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export class Post {
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readonly _id: string;
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@prop({ required: true, unique: true })
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title: string;
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@prop({ required: true })
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content: string;
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@prop({ required: true })
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category: string;
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@prop({ default: 'default.jpeg' })
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image: string;
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@prop({ required: true, ref: () => User })
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user: Ref<User>;
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}
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const PostModel = getModelForClass<typeof Post>(Post);
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export default PostModel;

‎src/resolvers/index.ts

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import UserResolver from './user.resolver';
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import PostResolver from './post.resolver';
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export const resolvers = [UserResolver] as const;
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export const resolvers = [UserResolver, PostResolver] as const;

‎src/resolvers/post.resolver.ts

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import { Arg, Args, Ctx, Mutation, Query, Resolver } from 'type-graphql';
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import {
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PostFilter,
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PostInput,
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PostListResponse,
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PostPopulatedResponse,
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PostResponse,
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UpdatePostInput,
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} from '../schemas/post.schema';
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import PostService from '../services/post.service';
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import type { Context } from '../types/context';
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@Resolver()
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export default class PostResolver {
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constructor(private postService: PostService) {
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this.postService = new PostService();
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}
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@Mutation(() => PostResponse)
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async createPost(@Arg('input') input: PostInput, @Ctx() ctx: Context) {
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return this.postService.createPost(input, ctx);
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}
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@Query(() => PostPopulatedResponse)
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async getPost(@Arg('id') id: string, @Ctx() ctx: Context) {
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return this.postService.getPost(id, ctx);
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}
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@Mutation(() => PostResponse)
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async updatePost(
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@Arg('id') id: string,
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@Arg('input') input: UpdatePostInput,
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@Ctx() ctx: Context
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) {
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return this.postService.updatePost(id, input, ctx);
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}
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@Query(() => PostListResponse)
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async getPosts(
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@Arg('input', { nullable: true }) input: PostFilter,
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@Ctx() ctx: Context
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) {
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return this.postService.getPosts(input, ctx);
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}
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@Mutation(() => Boolean)
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async deletePost(@Arg('id') id: string, @Ctx() ctx: Context) {
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return this.postService.deletePost(id, ctx);
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}
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}

‎src/schemas/post.schema.ts

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import { MinLength } from 'class-validator';
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import { Field, InputType, ObjectType } from 'type-graphql';
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import { UserData } from './user.schema';
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@InputType()
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export class UpdatePostInput {
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@MinLength(10, { message: 'Title must be at least 10 characters long' })
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@Field(() => String, { nullable: true })
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title: string;
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@MinLength(10, { message: 'Content must be at least 10 characters long' })
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@Field(() => String, { nullable: true })
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content: string;
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@Field(() => String, { nullable: true })
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category: string;
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@Field(() => String, { nullable: true })
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image: string;
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}
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@InputType()
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export class PostInput {
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@MinLength(10, { message: 'Title must be at least 10 characters long' })
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@Field(() => String)
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title: string;
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@MinLength(10, { message: 'Content must be at least 10 characters long' })
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@Field(() => String)
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content: string;
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@Field(() => String)
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category: string;
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@Field(() => String)
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image: string;
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}
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@InputType()
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export class PostFilter {
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@Field(() => Number, { nullable: true, defaultValue: 1 })
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page: number;
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@Field(() => Number, { nullable: true, defaultValue: 10 })
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limit: number;
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}
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@ObjectType()
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export class PostDataObj {
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@Field(() => String)
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readonly _id: string;
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@Field(() => String, { nullable: true })
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readonly id: string;
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@Field(() => String)
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title: string;
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@Field(() => String)
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category: string;
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@Field(() => String)
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content: string;
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@Field(() => String)
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image: string;
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@Field(() => Date)
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createdAt: Date;
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@Field(() => Date)
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updatedAt: Date;
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}
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@ObjectType()
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export class PostPopulatedData extends PostDataObj {
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@Field(() => UserData)
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user: UserData;
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}
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@ObjectType()
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export class PostData extends PostDataObj {
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@Field(() => String)
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user: string;
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}
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@ObjectType()
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export class PostResponse {
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@Field(() => String)
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status: string;
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@Field(() => PostData)
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post: PostData;
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}
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@ObjectType()
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export class PostPopulatedResponse {
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@Field(() => String)
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status: string;
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@Field(() => PostPopulatedData)
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post: PostPopulatedData;
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}
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@ObjectType()
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export class PostListResponse {
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@Field(() => String)
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status: string;
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@Field(() => Number)
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results: number;
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@Field(() => [PostPopulatedData])
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posts: PostPopulatedData[];
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}

‎src/services/post.service.ts

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import { ValidationError } from 'apollo-server-core';
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import errorHandler from '../controllers/error.controller';
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import deserializeUser from '../middleware/deserializeUser';
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import { PostFilter, PostInput } from '../schemas/post.schema';
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import PostModel from '../models/post.model';
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import { Context } from '../types/context';
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export default class PostService {
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async createPost(input: Partial<PostInput>, { req, res }: Context) {
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try {
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const user = await deserializeUser(req, res);
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const post = await PostModel.create({ ...input, user: user?._id });
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return {
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status: 'success',
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post: {
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...post.toJSON(),
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id: post?._id,
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},
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};
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} catch (error: any) {
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if (error.code === 11000)
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throw new ValidationError('Post with that title already exist');
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errorHandler(error);
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}
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}
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async getPost(id: string, { req, res }: Context) {
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try {
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await deserializeUser(req, res);
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const post = await PostModel.findById(id).populate('user').lean();
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if (!post) return new ValidationError('No post with that id exists');
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return {
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status: 'success',
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post,
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};
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} catch (error: any) {
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errorHandler(error);
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}
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}
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async updatePost(
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id: string,
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input: Partial<PostInput>,
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{ req, res }: Context
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) {
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try {
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const user = await deserializeUser(req, res);
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const post = await PostModel.findByIdAndUpdate(
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id,
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{ ...input, user: user?._id },
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{
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new: true,
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runValidators: true,
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lean: true,
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}
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);
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if (!post) return new ValidationError('No post with that id exists');
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return {
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status: 'success',
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post: {
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...post,
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id: post?._id,
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},
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};
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} catch (error: any) {
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errorHandler(error);
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}
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}
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async getPosts(input: PostFilter, { req, res }: Context) {
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try {
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const user = await deserializeUser(req, res);
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const postsQuery = PostModel.find({ user: user?._id }).populate('user');
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// Pagination
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const page = input.page || 1;
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const limit = input.limit || 10;
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const skip = (page - 1) * limit;
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const posts = await postsQuery
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.sort({ createdAt: -1 })
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.skip(skip)
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.limit(limit)
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.lean();
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return {
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status: 'success',
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results: posts.length,
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posts,
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};
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} catch (error: any) {
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errorHandler(error);
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}
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}
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async deletePost(id: string, { req, res }: Context) {
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try {
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await deserializeUser(req, res);
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const post = await PostModel.findByIdAndDelete(id);
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if (!post) return new ValidationError('No post with that id exists');
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return true;
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} catch (error: any) {
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errorHandler(error);
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}
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}
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}

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