Property 'save' does not exist on type 'Ipub[]' | mongoose - typescript - node.js

Question

i'm trying to update a schema in my backend app (with node/express/typescript), but when i do .save() it breaks because the type is not like type it's type[]
And in my app is happening the following error
Property 'save' does not exist on type 'Ipub[]'
This is the schema
import { Schema, model } from "mongoose";
import { Ipub } from "../helpers/PublicationInterfaces";
const publication = new Schema<Ipub>({
body: { type: String },
photo: { type: String },
creator: {
name: { required: true, type: String },
perfil: { type: String },
identifier: { required: true, type: String }
},
likes: [
{
identifier: { type: String }
}
],
comments: [
{
body: { type: String },
name: { type: String },
perfil: { type: String },
identifier: { type: String },
createdAt: { type: Date, default: new Date() },
likesComments: [
{
identifier: { type: String }
}
]
}
],
createdAt: { required: true, type: Date, default: new Date() }
});
export default model("Publications", publication);
This is schema's interface
import { Document } from "mongoose";
// Publication's representation
export interface Ipub extends Document {
body: string;
photo: string;
creator: {
name: string;
perfil?: string;
identifier: string;
};
likes?: [
{
identifier: string;
}
];
comments?: [
{
body: string;
name: string;
perfil: string;
identifier: string;
createdAt: Date;
likesComments: [
{
identifier: string;
}
];
}
];
createdAt: Date;
}
And this is where the code breaks, look the line of code where i put await updateSub.save()
// Look for user's publications
const usersPub: Ipub[] = await Publication.find();
const updatePub = usersPub.filter(
(p: Ipub) => p.creator.identifier === specificUser.id
);
// update photo
try {
if (banner !== "") {
specificUser.banner = banner;
} else if (perfil !== "") {
specificUser.perfil = perfil;
updatePub.map((pub: Ipub) => (pub.creator.perfil = perfil));
await updatePub.save();
}
await specificUser.save();
return res.json(specificUser);
} catch (err) {
console.log(err);
return res.status(500).json({ Error: "The API Failed" });
}
It's really weird, it looks like it's because of the Ipub[] type definition, what can i do about it !
Thanks for your help !