feat: post service

src/post/post.controller.ts

@@ -0,0 +1,16 @@
+import { Controller, Get, Param } from '@nestjs/common';
+import { PostService } from './post.service';
+
+@Controller('post')
+export class PostController {
+    constructor(private readonly postService: PostService) { }
+    @Get('all')
+    async getAllPost() {
+        return this.postService.getAllPost()
+    }
+
+    @Get(":id")
+    async getPostById(@Param('id') id: string){
+        return this.postService.getPostById(id)
+    }
+}

src/post/post.module.ts

@@ -1,7 +1,16 @@
 import { Module } from "@nestjs/common";
 import { CreatePostModule } from "./create-post/create.post.module";
+import { UpdatePostController } from "./update-post/update.post.controller";
+import { UpdatePostModule } from "./update-post/update.post.module";
+import { PostService } from './post.service';
+import { PostController } from './post.controller';
+import { MongooseModule } from "@nestjs/mongoose";
+import { Post, PostSchema } from "./schemas/post.schema";
 
 @Module({
-    imports: [CreatePostModule]
+    imports: [MongooseModule.forFeature([{ name: Post.name, schema: PostSchema }]),
+    CreatePostModule, UpdatePostModule],
+    providers: [PostService],
+    controllers: [PostController]
 })
 export class PostModule { } 

src/post/post.service.ts

@@ -0,0 +1,25 @@
+import { BadRequestException, HttpException, HttpStatus, Injectable } from '@nestjs/common';
+import { HttpErrorByCode } from '@nestjs/common/utils/http-error-by-code.util';
+import { InjectModel } from '@nestjs/mongoose';
+import { Model } from 'mongoose';
+import { Post, PostDocument } from './schemas/post.schema';
+
+@Injectable()
+export class PostService {
+    constructor(@InjectModel(Post.name) private postModel: Model<PostDocument>) { }
+    async getAllPost(): Promise<Post[]> {
+        try {
+            return await this.postModel.find()
+        } catch (error) {
+            throw new BadRequestException("cannot list posts")
+        }
+    }
+
+    async getPostById(id:string): Promise<Post>{
+        try {
+            return await this.postModel.findById(id)
+        } catch (error) {
+            throw new HttpException(`a post with this ${id} was not found`,HttpStatus.NOT_FOUND,)
+        }
+    }
+}