Unable to set array property in angular6

Question

I need to set array property in angular 6 with this code :

this.addupdate.roleids=this.selectedRole;

but it shows me this error :

ERROR TypeError: Cannot set property 'roleids' of undefined at AccessLevelComponent.push../src/app/admin/admin/dashboard/role/access-level/access-level.component.ts.AccessLevelComponent.AddRoleClaim (access-level.component.ts:60)

selectedRole:string[]=['1011','1010','1005'];

and my interface :

export interface IAddorupdateRole {
  roleids:string[];
  roleid:number;
}

this my code :

public AddRoleClaim(){
  console.log("enter AddRoleClaim.Ts");
  this.addupdate.roleids=this.selectedRole;
  this.addupdate.roleid=this.roleId;
  this.roleService.AddOrUpdateRoleCalim(this.addupdate).subscribe((data)=>
    {
      console.log("seccess" + data);
    }
  );
}

What's the problem ? how can I solve that?

SiddAjmera · Accepted Answer · 2018-11-24 11:40:39Z

2

roleids is to be accessed on this.addupdate but apparently this.addupdate is undefined. Maybe it hasn't been initialized yet.

Try to initialize this.addupdate to a basic object in the ngOnInit something like this:

addupdate: IAddorupdateRole;

ngOnInit() {
  this.addupdate = {
    roleids = [],
    roleid = 0
  }
}

Here's a Sample StackBlitz for your ref.

edited Nov 24, 2018 at 11:40

answered Nov 24, 2018 at 11:26

SiddAjmera

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