[dashboard] Yaql types 'validators' support in dynamic UI is broken

[Vahid Hashemian]

Steps to create:

1. Use a HOT template with a parameter with specified "allowed_values".

2. Create a HOT package using "murano package-create --template ..."

3. Import the HOT package using "murano package-import ..."

4. In the dashboard, create an environment and add the imported package to the environment. I tried dropping the application onto the environment.

An error would pop up saying "Danger: An error occurred. Please try again later."
The horizon log shows:

...
2015-09-22 01:27:24.173456 TypeError: Error when calling the metaclass bases
2015-09-22 01:27:24.173464 cannot deepcopy this pattern object

The HOT template used, the screenshot of the error, and the full log trace is attached.
I used the latest devstack and murano codebase when hitting this bug.

[Kevin Tibi (ktibi)]

I can import HOT file with allowed_values but murano not propose a list for my choice when I deploy package.

[Ekaterina Chernova (efedorova)]

The main reason for this bug is that dynamic UI does not support 'validators'. Example is here https://github.com/openstack/murano-apps/blob/master/Windows/ActiveDirectory/package/UI/ui.yaml#L75

It is used to apply several validators for the one field or to use yaql expression as a validator

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/266867

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/266867
Committed: https://git.openstack.org/cgit/openstack/murano-dashboard/commit/?id=b3bdf5f0aa001851b280dbeaf2c2e3f256ffe18e
Submitter: Jenkins
Branch: master

commit b3bdf5f0aa001851b280dbeaf2c2e3f256ffe18e
Author: Ekaterina Chernova <email address hidden>
Date: Wed Jan 13 15:03:26 2016 +0300

    Restore YAQL validators support

    It was broken after YAQl release since YAQL expression
    object contains recursive reference and deepcopy operation
    failed. So need to copy such objects manually in
    a separate function.

    To prevent such kind of failures,
    test of hot-based package was added.

    Change-Id: If3fde7552d9657055aded73c4967fb6832c17536
    Closes-Bug: #1498253