What steps should be taken to rectify the issue of a missing type in a property within an

After spending the last 2 years working on Angular, I am now encountering an issue with a new interface for the first time. The specific error message is as follows:

Type 'MatTableDataSource<Tasks[]>' is missing the following properties from type 'Tasks[][]': length, pop, push, concat, and 24 more.ts(2740)

I would greatly appreciate any assistance in resolving this minor issue. Below is the code snippet in question:

export interface Tasks {
  id: string;
  title: string;
  description: string;
  assignedTo: Array<Team>,
  status: string;
}

Service

 getTasks(): Observable<Tasks[]> {
    return this.http.get<Tasks[]>(`${environment.API_URL}tasks`).pipe(
      map(data => {
        return data;
      })
    )
  }

Component File

getTasks() {
    this.taskService.getTasks().subscribe(response => {
      console.log(response)
      if (this.tasks) {
        this.dataSource.data = new MatTableDataSource<Tasks[]>(response)
      }
      console.log(this.tasks)
    })
  }

https://i.sstatic.net/Oa9Up.png

Any tips or solutions would be highly appreciated!

Answer №1

There is no need to specify the type of MatTableDataSource as Tasks[]. Internally, MatTableDataSource interprets your type as T[].

dataSource = new MatTableDataSource<Tasks>() // Tasks represents each row of the mat-table

getTasks() {
  // your code
  this.dataSource.data = response
}

In my opinion, it would be more appropriate to rename your interface as Task instead of Tasks, since it represents just one Task.

Answer №2

Implement the following approach -

Instantiate this.dataSource with a new MatTableDataSource<Tasks>(response)

Answer №3


const taskList!: MatTableDataSource<Items>

taskList.tasks = responseData

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