Code for Medium

UserInfo.ts

interface IUserInfo {
    id: number;
    FirstName: string;
    LastName: string;
    Height: number;
    Weight: number;
    Sex: 'Male' | 'Female';
    Waist: number;
    Wrist: number;
    Hip: number;
    Forearm: number;
}
interface UserInfoModel extends mongoose.Model<IUserInfo> {}
const UserInfo = mongoose.model<IUserInfo, UserInfoModel>(“UserInfo”, userInfoSchema);