Values not populated when using hideExpression

[sveatlo]

I'm submitting a ... (check one with "x")

[x] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request

Current behavior

When formModel is loaded asynchronously (eg. editing some data from server) and the form uses hideExpression on some of its fields, values for these fields don't get populated to form.

Expected behavior

Values from the model should be available in the form.

Minimal reproduction of the problem with instructions

https://stackblitz.com/edit/angular-jjhxfl

What is the motivation / use case for changing the behavior?

Please tell us about your environment:

• Angular version: 4.3.6 and 5.0.2

• Browser: all

• Language: TypeScript 2.4.2

• Node (for AoT issues): node --version = v9.2.0

[aitboudad]

neither model nor validation are applied when combining hideExpression with the key, you can achieve your use case using fieldGroup:

    {
      hideExpression: 'model.group_id !== "3"',
      fieldGroup: [
        {
          type: 'input',
          key: 'group.demo_input',
          templateOptions: {
            label: 'Demo input'
          },
        }
      ]
    }

[aitboudad]

well I think this is bug and the new model value should be taken into account