Implement: getOneUser

package.json

@@ -25,6 +25,7 @@
     "@nestjs/core": "^8.0.0",
     "@nestjs/platform-express": "^8.0.0",
     "@prisma/client": "3.12.0",
+    "class-transformer": "^0.5.1",
     "class-validator": "^0.13.2",
     "reflect-metadata": "^0.1.13",
     "rimraf": "^3.0.2",

src/user/dto/get_user.dto.ts

@@ -0,0 +1,7 @@
+import { IsNotEmpty, IsNumber } from 'class-validator';
+
+export class GetUserParam {
+    // @IsNumber()
+    @IsNotEmpty()
+    userId: number;
+}

src/user/user.controller.ts

@@ -1,7 +1,8 @@
-import { Body, Controller, Get, Post } from '@nestjs/common';
+import { Body, Controller, Get, Param, Post } from '@nestjs/common';
 
 import { UserService } from '@user/user.service';
 import { CreateUserBody } from '@user/dto/create_user.dto';
+import { GetUserParam } from './dto/get_user.dto';
 
 @Controller('users')
 export class UserController {
@@ -12,6 +13,11 @@ export class UserController {
         return this.userService.getUsers();
     }
 
+    @Get('/:userId')
+    getUser(@Param() param: GetUserParam) {
+        return this.userService.getUser(param);
+    }
+
     @Post()
     createUser(@Body() body: CreateUserBody) {
         return this.userService.createUser(body);

src/user/user.module.ts

@@ -2,9 +2,10 @@ import { Module } from '@nestjs/common';
 import { UserService } from '@user/user.service';
 import { UserController } from '@user/user.controller';
 import { UserRepository } from '@user/user.repository';
+import { UserValidator } from '@user/user.validator';
 
 @Module({
-    providers: [UserService, UserRepository],
+    providers: [UserService, UserRepository, UserValidator],
     controllers: [UserController],
 })
 export class UserModule {}

src/user/user.repository.ts

@@ -11,9 +11,13 @@ export class UserRepository {
         return this.prisma.user.findMany();
     }
 
-    createUser(data: ReturnType<UserValidator['createUserValidator']>) {
-        return this.prisma.user.create({
-            data,
-        });
+    getUser(userFindUniqueArgs: ReturnType<UserValidator['getUserValidator']>) {
+        return this.prisma.user.findUnique(userFindUniqueArgs);
+    }
+
+    createUser(
+        userCreateInput: ReturnType<UserValidator['createUserValidator']>,
+    ) {
+        return this.prisma.user.create(userCreateInput);
     }
 }

src/user/user.service.ts

@@ -3,6 +3,7 @@ import { Injectable } from '@nestjs/common';
 import { UserRepository } from '@user/user.repository';
 import { UserValidator } from '@user/user.validator';
 import { CreateUserBody } from '@user/dto/create_user.dto';
+import { GetUserParam } from './dto/get_user.dto';
 @Injectable()
 export class UserService {
     constructor(
@@ -14,6 +15,12 @@ export class UserService {
         return this.userRepository.getUsers();
     }
 
+    getUser(param: GetUserParam) {
+        return this.userRepository.getUser(
+            this.userValidator.getUserValidator(param),
+        );
+    }
+
     createUser(body: CreateUserBody) {
         return this.userRepository.createUser(
             this.userValidator.createUserValidator(body),

src/user/user.validator.ts

@@ -1,14 +1,26 @@
 import { Injectable } from '@nestjs/common';
 import { Prisma } from '@prisma/client';
 
-import { CreateUserBody } from '@user/dto/create_user.dto';
+import type { CreateUserBody } from '@user/dto/create_user.dto';
+import type { GetUserParam } from '@user/dto/get_user.dto';
 
 @Injectable()
 export class UserValidator {
     createUserValidator({ email, name }: CreateUserBody) {
-        return Prisma.validator<Prisma.UserCreateInput>()({
-            email,
-            name,
+        return Prisma.validator<Prisma.UserCreateArgs>()({
+            data: {
+                email,
+                name,
+            },
+        });
+    }
+
+    getUserValidator({ userId }: GetUserParam) {
+        return Prisma.validator<Prisma.UserFindUniqueArgs>()({
+            rejectOnNotFound: true,
+            where: {
+                id: Number(userId),
+            },
         });
     }
 }

yarn.lock

@@ -1630,6 +1630,11 @@ cjs-module-lexer@^1.0.0:
   resolved "https://registry.yarnpkg.com/cjs-module-lexer/-/cjs-module-lexer-1.2.2.tgz#9f84ba3244a512f3a54e5277e8eef4c489864e40"
   integrity sha512-cOU9usZw8/dXIXKtwa8pM0OTJQuJkxMN6w30csNRUerHfeQ5R6U3kkU/FtJeIf3M202OHfY2U8ccInBG7/xogA==
 
+class-transformer@^0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/class-transformer/-/class-transformer-0.5.1.tgz#24147d5dffd2a6cea930a3250a677addf96ab336"
+  integrity sha512-SQa1Ws6hUbfC98vKGxZH3KFY0Y1lm5Zm0SY8XX9zbK7FJCyVEac3ATW0RIpwzW+oOfmHE5PMPufDG9hCfoEOMw==
+
 class-validator@^0.13.2:
   version "0.13.2"
   resolved "https://registry.yarnpkg.com/class-validator/-/class-validator-0.13.2.tgz#64b031e9f3f81a1e1dcd04a5d604734608b24143"