Using models to transfer data between server and client components is a common practice, allowing for data sharing across various parts of an application through services.
For instance, consider having two views (components) in your application to interact with database information. One view displays a list of all items (e.g. Users) while the other allows for adding or editing. In this scenario, you could create a UserService service containing functions like GetUser, UpdateUser, and CreateUser that operate on User models.
In more intricate data scenarios, you might opt for separate "list" and "regular" models like UserListModel and UserModel to prevent fetching excessive amounts of data when dealing with summarized lists. Nonetheless, simplicity and reusability play key roles in model creation, particularly if tools like TypeWriter in Visual Studio help generate TypeScript versions of server-side DTOs and Entities, streamlining development and maintaining code consistency.
EDIT
Regarding your query - it's not a ModelComponent but rather a standalone model/class structured as:
export class UserModel {
public userName: string;
public email: string;
public firstName: string;
public lastName: string;
}
To utilize the UserModel instances across components, a UserService defined in user.service.ts can serve as follows:
export class UserService {
constructor(
private http: HttpClient,
@Inject('BASE_URL') private baseUrl: string) {}
getUser(userId:number): Observable<UserModel> {
return this.http.get<UserModel>(this.baseUrl + 'api/users/get/' + userId);
}
getUsers(): Observable<UserModel[]> {
return this.http.get<UserModel[]>(this.baseUrl + 'api/users/list');
}
}
The UserService would then be injected into both components as demonstrated below:
export class UserListComponent implements NgOnit{
public users: UserModel[];
constructor(
private userService: UserService
) {
}
ngOnInit(): void {
this.userService.getUsers().subscribe(users => {
this.users = users;
});
};
}
export class UserComponent implements NgOnit{
public user: UserModel;
constructor(
private userService: UserService
) {
}
ngOnInit(): void {
this.userService.getUser(/*some userId probably from route*/).subscribe(user => {
this.user = user;
});
};
}