How do I refer to the _id field in a mongodb database via a REST API GET call? - mongodb

Question

This is hard to explain, so please bear with me.
I have a Nestjs-based server that is using MongoDB as the back end. Here are the three entries from the mongodb collection:
{"_id":{"$oid":"5e87ef7a9cf8648fac6b9f1e"},"complete":false,"editMode":false,"createdAt":{"$date":{"$numberLong":"1585966970857"}},"createdBy":"user","isDeleted":false,"title":"Make a birthday cake","note":"Make sure she poops."}
{"_id":{"$oid":"5e87f081237c70a6782d6c2a"},"createdAt":{"$date":{"$numberLong":"1585967233825"}},"createdBy":"user","isDeleted":false,"complete":false,"editMode":false,"title":"Clean the kitchen","note":"Use Lysol"}
{"_id":{"$oid":"5e87f73be81d7e0061311187"},"createdAt":{"$date":{"$numberLong":"1585968955971"}},"createdBy":"user","isDeleted":false,"complete":false,"editMode":false,"title":"Walk the dog","note":"Make sure she poops."}
Here is my model:
#Entity()
export class Todo {
#ObjectIdColumn()
#Transform(value => value.toString(), { toPlainOnly: true })
id: ObjectID;
#Column({ length: 100 })
title: string;
#Column({ length: 5000 })
note: string;
#Column()
complete: boolean;
#Column()
editMode: boolean;
#Exclude() #Column() createdAt: Date = new Date();
#Exclude() #Column() createdBy: string = 'user';
#Exclude() #Column() isDeleted: boolean = false;
}
Here is my GET-er stuff:
#Get(':id')
async getTodo(#Param('id') id: number) {
return this.todosService.getTodo(id);
}
async getTodo(id: number): Promise<Todo | undefined> {
return this.todosRepository.findOne(id, {
where: {
isDeleted: false,
},
});
}
I would like to run a REST GET call to retrieve one of the documents, say the third one. Therefore I call in my browser:
http://localhost:3000/todos/5e87f73be81d7e0061311187
Well, this returns the first document. In fact, anything I call only returns the first document.
What should my GET call be to get the third item?
I can provide any further information that might be needed.

Answer 1

Firstly, i think the id parameter (id: number), should be a string.
Also, findone takes all the querying parameter in first argument itself ( atleast in JS), so it should be like todoRepository.findOne({_id .$oid: string, isDeleted: false }).
Can you tell me what's $oid? ObjectId type? I haven't worked with nest.js/ typescript. Depending upon this you might want to improve the $oid in query argument.

Answer 2

Here's the answer: Make the id parameter an ObjectID type everywhere in the application.
For instance:
#Get(':id')
async getTodo(#Param('id') id: ObjectID) {
return this.todosService.getTodo(id);
}
async getTodo(id: ObjectID): Promise<Todo | undefined> {
return this.todosRepository.findOne(id, {
where: {
isDeleted: false,
},
});
}
Once I did that, it all worked as expected.