How to save api response in MongoDB in NestJs - mongodb

Question

I am using NestJs as a backend service where I am hitting some third party API and want to save response in MongoDB. I am unable to get how can I save data in MongoDB as I have DTO class for the data I want to save.
Below is my code:
app.module.ts
import { Module } from '#nestjs/common';
import { MongooseModule } from '#nestjs/mongoose';
import { AppController } from './app.controller';
import { AppService } from './app.service';
import { UserModule } from './user/user.module';
#Module({
imports: [UserModule,
MongooseModule.forRoot('mongodb://localhost/status')],
controllers: [AppController],
providers: [AppService],
})
export class AppModule {}
user.module.ts
import { HttpModule } from '#nestjs/axios';
import { Module } from '#nestjs/common';
import { MongooseModule } from '#nestjs/mongoose';
import { ScheduleModule } from '#nestjs/schedule';
import { StatusSchema } from './schemas/status.schema';
import { UserController } from './user.controller';
import { UserService } from './user.service';
#Module({
imports:[HttpModule,
ScheduleModule.forRoot(),
MongooseModule.forFeature([{ name: 'Status', schema: StatusSchema }])],
controllers: [UserController],
providers: [UserService]
})
export class UserModule {}
status.schema.ts
import { Prop, Schema, SchemaFactory } from "#nestjs/mongoose";
import { Document } from "mongoose";
export type StatusDocument = Status & Document;
#Schema()
export class Status{
#Prop()
total:String;
}
export const StatusSchema = SchemaFactory.createForClass(Status);
status.dto.ts
export class StatusDto{
total:string;
}
user.service.ts
#Injectable()
export class UserService {
constructor(private httpService:HttpService,
private schedulerRegistry:SchedulerRegistry,
#InjectModel('Status') private readonly statusModel:Model<Status>){}
private readonly logger = new Logger(UserService.name);
async dynamicJob(){
this.logger.log("in main function");
const dat = await this.nameFun();
this.logger.warn(dat);
//Here I want to save the dat inside MongoDB
}
nameFun = async () =>{
const url = 'https://reqres.in/api/unknown';
const result = await axios.get(url);
this.logger.log("In nameFun " + result.data.total);
return result.data.total;
}
}
How can I add data inside MongoDB at specified place in above function?

Answer 1

Here's a working example with json placeholder data that I can test with since I don't know what your response looks like. I'm just passing in the text from the title field of the response into the total field of your Status schema.
Your 2 functions of UserService would look like this.
async dynamicJob() : Promise<Status> {
this.logger.log('in main function');
const dat = await this.nameFun();
this.logger.warn(dat);
const dto = { total: dat }; // creating dto in the form of your schema
this.logger.log(dto);
return await this.statusModel.create(dto); // saves and returns saved object
}
nameFun = async () => {
const url = 'https://jsonplaceholder.typicode.com/todos/2';
const result = await axios.get(url);
// you'll need to change this back to correct parsing of your actual response
this.logger.log('In nameFun ' + result.data.title);
return result.data.title;
};
Then the corresponding function in your UserController would look something like this, which whatever endpoint you want to use. Here I'm just using from-api.
#Get('from-api')
async getFromApi() : Promise<Status> {
return this.userService.dynamicJob();
}
Get request from this endpoint
http://localhost:3000/user/from-api/
returns the newly created document in Mongo
{
"total": "quis ut nam facilis et officia qui",
"_id": "622a1a6e990efa55c984dc4b",
"__v": 0
}