update: user query, posts resolvefield 추가

Author: daseul22

prisma/schema.prisma

@@ -22,7 +22,7 @@ model User {
   password    String
   avatar      String?
   createdDate DateTime   @default(now())
-  updatedDate DateTime?
+  updatedDate DateTime?  @updatedAt
   posts       Post[]
 }
 
@@ -31,7 +31,7 @@ model Post {
   title       String
   description String?
   createdDate DateTime  @default(now())
-  updatedDate DateTime?
-  user        User?     @relation(fields: [userId], references: [id])
-  userId      Int?
+  updatedDate DateTime? @updatedAt
+  user        User      @relation(fields: [userId], references: [id])
+  userId      Int
 }

src/post/models/post.model.ts

@@ -14,9 +14,9 @@ export class Post extends PostResolveFields {
   @Field()
   title: string
   @Field()
-  description: string
+  description?: string
   @Field()
   createdDate: Date
   @Field()
-  updatedDate: Date
+  updatedDate?: Date
 }

src/post/post.service.ts

@@ -1,4 +1,5 @@
 import { Injectable } from '@nestjs/common'
+import { PrismaService } from 'src/prisma/prisma.service'
 
 @Injectable()
 export class PostService {}

src/schema.gql

@@ -3,6 +3,7 @@
 # ------------------------------------------------------
 
 type User {
+  posts: [Post!]
   id: Int!
   username: String
   name: String!
@@ -11,7 +12,7 @@ type User {
   email: String!
   avatar: String
   createdDate: DateTime!
-  updatedDate: DateTime!
+  updatedDate: DateTime
 }
 
 enum UserGender {
@@ -24,7 +25,15 @@ A date-time string at UTC, such as 2019-12-03T09:54:33Z, compliant with the date
 """
 scalar DateTime
 
+type Post {
+  user: User!
+  id: Int!
+  title: String!
+  description: String
+  createdDate: DateTime!
+  updatedDate: DateTime
+}
+
 type Query {
-  """Get a user by id"""
-  me: User!
+  user(id: Int!): User!
 }

src/user/dto/user.args.ts

@@ -0,0 +1,7 @@
+import { ArgsType, Field, Int } from '@nestjs/graphql'
+
+@ArgsType()
+export class UserArgs {
+  @Field(() => Int)
+  id: number
+}

src/user/models/user.model.ts

@@ -43,5 +43,5 @@ export class User extends UserResolveFields {
   @Field()
   createdDate: Date
   @Field()
-  updatedDate: Date
+  updatedDate?: Date
 }

src/user/user.module.ts

@@ -3,7 +3,6 @@ import { UserService } from './user.service'
 import { UserResolver } from './user.resolver'
 
 @Module({
-  providers: [UserService, UserResolver],
-  exports: [UserService]
+  providers: [UserService, UserResolver]
 })
 export class UserModule {}

src/user/user.resolver.ts

@@ -1,12 +1,47 @@
-import { Query, Resolver } from '@nestjs/graphql'
+import { BadRequestException } from '@nestjs/common'
+import { Args, Parent, Query, ResolveField, Resolver } from '@nestjs/graphql'
+import { Post } from 'src/post/models/post.model'
+import { PrismaService } from 'src/prisma/prisma.service'
+import { UserArgs } from './dto/user.args'
 import { User } from './models/user.model'
+import { UserService } from './user.service'
 
 @Resolver(() => User)
 export class UserResolver {
-  @Query(() => User, {
-    description: 'Get a user by id'
+  constructor(
+    private userService: UserService,
+    private prisma: PrismaService
+  ) {}
+
+  // ==================== Query ====================
+  @Query(() => User)
+  async user(@Args() { id }: UserArgs) {
+    try {
+      const user = this.userService.user(id)
+
+      return user
+    } catch (err) {
+      console.log(err)
+      throw new BadRequestException(err.message)
+    }
+  }
+
+  // ==================== ResolveFiled ====================
+  @ResolveField(() => [Post], {
+    nullable: true
   })
-  async me() {
-    return {}
+  async posts(@Parent() user: User) {
+    try {
+      const posts = this.prisma.user
+        .findUnique({ where: { id: user.id } })
+        .posts()
+
+      return posts
+    } catch (err) {
+      console.log(err)
+      throw new BadRequestException(err.message)
+    }
   }
+
+  // ==================== Mutation ====================
 }

src/user/user.service.ts

@@ -1,4 +1,11 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable } from '@nestjs/common'
+import { PrismaService } from 'src/prisma/prisma.service'
 
 @Injectable()
-export class UserService {}
+export class UserService {
+  constructor(private prisma: PrismaService) {}
+
+  async user(id: number) {
+    return await this.prisma.user.findUnique({ where: { id } })
+  }
+}