How to get nested URL query in Nest.js

Question

I have NestJS application I have to get the query from the URL. Problem is that my creationDate is an object and I can't get it as the nested object via @Query.

Here is example of the route:

xxx/yyy/orders?key1=value&key2=value&key3=value&createdAt[lte]=2021-07-01&createdAt[gte]=2011-03-30&orderBy=desc&limit=500

I am trying to get createdAt[lte] and createdAt[gte] as the nested object

export interface QueryI {
key1: string;
key2: string;
key3: string;
key4: string;
createdAt: {
    lte: string,
    gte: string,
}
orderBy: 'desc' | 'asc';
limit: number;
}

Here is my controller:

@Get('route')
getAll(
    @Query() query: QueryI): Promise<void> { 
    return this.myService.findAll(query);
}

but this gives me following result

{

key1: 'value',        
  key2: 'value',
  key3: 'value',       
  key4: 'value',
  'createdAt[lte]': 'some date',
  'createdAt[gte]': 'some date',
  orderBy: 'desc',
  limit: '500'

}

I have tried JSON.stringify and consulted similar questions on SOW but no luck.

Thank you

Answer 1

EDIT

In the end I have implemented diferent classes and used @Pipe to validate my query: Here is the code:

pipe.ts

@Injectable()
export class ValidateQueryPipe implements PipeTransform {
  transform(value: any, metadata: ArgumentMetadata) {
    let incomingQuery = value as IncomingQuery;
    let mappedQuery = new QueryParameters()
    mappedQuery.key1 = incomingQuery.key1
    mappedQuery.key2= incomingQuery.key2
    // other mapped valus
    mappedQuery.createdAt = new CreatedAt(incomingQuery['createdAt[lte]'], incomingQuery['createdAt[gte]'])        
    return mappedQuery;
  }

controller.ts

@Get(':someurl/someurl')
getAllOrders(
    @Query(ValidateQueryPipe) query: QueryParameters): Promise<Observable<any>> { 
    return this.service.findAll(erpCode, query);
}

query-parameters.ts

import { CreatedAt } from "./created-at";

export class QueryParameters {
    key1: string;
    key2: string;
    createdAt: CreatedAt;
}

created-at.ts

export class CreatedAt {
    lte: string;
    gte: string;

    constructor(lte: string, gte: string){
        this.lte = lte;
        this.gte = gte;
    };
}

---

Well I have found a partial solution and I will post it here untill better answer comes along: I am extracting the nested properties into seperate queries and creating my model. It's not perfect but it's doing the job for now...

controller.ts

 getAllOrders(
    @Query() query,
    @Query('createdAt[lte]') lte: string, 
    @Query('createdAt[gte]') gte: string): Promise<void> { 
    const mappedObject = new QueryParameters(query, lte, gte)
    return this.orderService.findAll(erpCode, mappedObject);
}

createdAtModel.ts

    export class CreatedAt {
    lte: string;
    gte: string;

    constructor(lte: string, gte: string){
        this.lte = lte;
        this.gte = gte;
    };
}

my-model.ts

import { CreatedAt } from "./created-at";

export class QueryParameters {
    //other keys
    createdAt: CreatedAt;

    constructor(query, lte, gte){
        //other keys
        this.createdAt = new CreatedAt(lte, gte)
    }
}

I am sure that better answer lies in using the NestJS validation pipes but I didn't manage to find the one that works for me.