Mongoose/Typescript issue - node.js

Question

So, i have to update some data inside my main interface, the problem is that, when i tried to do that, it complains because .save() is not defined
So i create another interface to that data in order to extends Document so i can have access to .save()
But, here's the new error....
const theComment: IComment
Type 'Comment' is missing the following properties from type 'IComment': $getAllSubdocs, $ignore, $isDefault, $isDeleted, and 47 more.
Here's my code
What i want to update ( the problem is theComment )
export const editComment = async (req: Request, res: Response) => {
const {publicationId} = req.params;
const { identifier, body, commentId } = req.body;
// Check id's
if (!mongoose.Types.ObjectId.isValid(identifier!))
return res.status(400).json({ Message: "identifier not valid" });
if (!mongoose.Types.ObjectId.isValid(publicationId!))
return res.status(400).json({ Message: "identifier not valid" });
if (!mongoose.Types.ObjectId.isValid(commentId!))
return res.status(400).json({ Message: "identifier not valid" });
// Find pub
const thePub: Ipub = await Publication.findById(publicationId);
// Find user
const theUser: Iauth = await User.findById(identifier);
// Find comment, make sure that comment is from that user
const theComment: IComment = thePub.comments!.find((f) => f.id === commentId && f.identifier === theUser.id)!;
if(!theComment) return res
.status(405)
.json({ Message: "You are not the owner of the comment || Comment doesn't exist" })
// Make sure body is not empty
if(!body) return res.status(404).json({Message: 'No data provided'})
try {
// Update comment and perfil if it has changed
theComment.body = body;
theComment.perfil = theUser.perfil;
await theComment.save()
return res.json(theComment)
} catch (err) {
console.log(err);
return res.status(500).json({ Error: "the API failed" });
}
};
Main interface
export interface Ipub extends Document {
id?: string;
body: string;
photo: string;
creator: {
name: string;
perfil?: string;
identifier: string;
};
likes?: Likes[];
comments?: Comment[];
createdAt: string;
}
Data's interface that i want to update inside my main interface
export interface IComment extends Document {
id?: string;
body: string;
name: string;
perfil?: string;
identifier: string;
createdAt: string;
likesComments?: Likes[];
}
What can i do ? how can i solve it ?
Thanks for your time comunnity !!

Answer 1

TS Compiler says the object described by Comment interface doesn't have .save() method. And as far as I presume it should not have because it's not a MongoDB document.
The time you inherit all props from Document interface the compiler throws the error saying that types Comment & IComment are not compatible because the second one has Document props, and the first one doesn't. To fix it you should just cast the type directly like this:
const theComment = thePub.comments!.find((f) => f.id === commentId && f.identifier === theUser.id)! as IComment;
But in order to update the comment you have to update 'whole' Publication document(for example, by using aggregate):
Publication.update(
{
"id": publicationId,
"comments.id": commentId,
"comments.identifier": theUser.id,
},
{ $inc: {
"comments.$.body": body,
"comments.$.perfil": theUser.perfil,
}},
false,
true,
);
Or the best option I think is to use relationships between Documents. Create another Document named Comment and save all related comments there. In that case you will have an ability to use .save() and other methods provided.