ERROR Error: No value accessor for form control with unspecified name attribute on switch

Question

Here is my component in Angular 4:

@Component( {
    selector: \'input-extra-field\',
    template: `
            


        
      

Answer 1

I also had the same error , angular 7

 
      {{city.name}}
 

I just added ngDefaultControl

   
  {{city.name}}