.

src/models/post.model.ts

 import { model, Schema } from "mongoose";
 
-export interface PostType {
-    id: string;
-    title: string;
-    date: Date;
-    body : string;
-    counts?: number;
-    theme: string;
-    city: string;
-  }
-  
+export interface PostType extends PostingType {
+  date?: string;
+  counts: number;
+  id?: string;
+}
+
+export interface PostingType {
+  title: string;
+  text?: string;
+  theme: string;
+  city: string;
+  username: string;
+}
+
 const schema = new Schema<PostType>({
-  id : {type: String},
-  title : { type: String },
-  date : {type: Date},
-  body : {type : String},
-  counts : {type: Number},
-  theme : {type: String},
-  city : {type: String},
-  
+  id: { type: String },
+  title: { type: String },
+  date: { type: Date },
+  text: { type: String },
+  counts: { type: Number },
+  theme: { type: String },
+  city: { type: String },
+  username: { type: String },
 });
 
 export default model<PostType>("Post", schema);