Property Type Does Not Exist - MongoDB WithId<Document>

Question

Using:

• ts-node: 10.7.0
• MongoDB: 4.4.1
• GraphQL: 16.3

I am trying to get a response back from a mongo db request.

The request is successfully coming back, but typescript is throwing errors related to properties not existing on the type. I have declared the interface.

The error I am getting is (on 3rd console log in code below):

Property 'schema' does not exist on type 'WithId<Document>[]'

Code:

    interface permissionSchemaCollectionResponse extends WithId<Document> {
      _id: ObjectId; 
      collection: string;
      schema: any;
    }
  
    const permissionSchemaCollectionResponse = (await 
    permissionSchemaCollection.find(filter).toArray());
    
    console.log('permissionSchemaCollectionResponse');
    console.log(permissionSchemaCollectionResponse);

    console.log(permissionSchemaCollectionResponse.schema.record); 

Response from Mongo:

permissionSchemaCollectionResponse
[
  {
    _id: new ObjectId("62093b950759ba6867f477e2"),
    collection: 'apps',
    schema: { record: [Object], properties: [Object] }
  }
]

Attempt at adding a "model":

permissions.ts

import type { WithId, Document, ObjectId } from 'mongodb'

export default class PermissionSchema {
    constructor(public id: ObjectId, public collection: string, public schema: any) {}
}

Response using "as" imported model:

const  permissionSchemaCollectionResponse = (await permissionSchemaCollection.find(filter).toArray()) as PermissionSchema[];

Error when using imported model

Conversion of type 'WithId<Document>[]' to type 'PermissionSchema[]' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.

Answer 1

Ended up being both a typing and trying to access a array as an attribute errors.

Resolved with:

model:

import type { WithId, Document, ObjectId } from 'mongodb'

export default class Permissions {
    constructor(public _id: ObjectId, public collection: string, public schema: any) {}
}

Import model with:

import Permissions from "../../models/permissions";

Getting and typing response from mongo:

const permissionSchemaCollectionResponse: Permissions[] = (await permissionSchemaCollection.find(filter).toArray()) as Permissions[];

console.log('permissionSchemaCollectionResponse');
console.log(permissionSchemaCollectionResponse);

console.log(permissionSchemaCollectionResponse[0].schema);

Answer 2

Pass the schema type as a generic to the find method:

const permissions = await permissionSchemaCollection.find<PermissionSchema>(filter).toArray()