php yii2表单字段取决于表单字段

Question

I am searching for a solution to my problem in php/yii2. I am using DependDropdown widget.

To guide : My currently working (lets say 'Application') table has columns:

1.  Id    
2.  student_id
3.  university_id    [....rest....]

In my ActiveForm I have a dropdownlist with lets say students names. They are grouped in model, but in case if there would be students with the same name and surname I want to add Depend Dropdown with Personal Identify Number to choose specific person. But column with this number is from another table than my $model . Application table has student_id column, and I want to get that student_id to ActiveForm , but by searching it from my Dropdown with personal ID. I try to show it on example

<droplist with names > I choose for example Carl Dickens

<droplist with Personal number>

Case 1: Okay, in DB students table there is only 1 Carl Dickens. So there is only 1 number to choose from droplist

Case 2: There are some Carls Dickens in DB. All Carl Dickens personal numbers are dropped to dropdown list, so u can choose correct one by it

<droplist with Personal number> is not a column from $model (Application) table, and that's my problem in ActiveForm. Can somebody help me? Thanks

Answer 1

Please declare $personal_number as a variable in your model

class Application extends ActiveRecord
{

public $personal_number;


.....
}