OpenStack Mistral workflow error while executing using GUI - openstack

Question

I am getting error while executing OpenStack simple mistral workflow on OpenStack(wallaby) devstack environment. While I can execute the workflow from CLI command and got success But it fails if I try the same thing with GUI
root#openstack:~# openstack workflow definition show test_get
---
version: '2.0'
test_get:
description: Test Get.
tasks:
my_task:
action: std.http
input:
url: http://www.google.com
root#openstack:~# openstack workflow execution create test_get
+--------------------+--------------------------------------+
| Field | Value |
+--------------------+--------------------------------------+
| ID | 482e3803-45ef-411e-a0f4-1427abfc8649 |
| Workflow ID | 9dc0d4a4-8c5b-4288-8126-e1147da3bd02 |
| Workflow name | test_get |
| Workflow namespace | |
| Description | |
| Task Execution ID | <none> |
| Root Execution ID | <none> |
| State | RUNNING |
| State info | None |
| Created at | 2021-06-21 16:58:54 |
| Updated at | 2021-06-21 16:58:54 |
| Duration | ... |
+--------------------+--------------------------------------+
But while executing in GUI I get **
Execution is missing field "workflow_identifier"
**

Answer 1

Faced the same issue in Yoga release. Spent a few hours to investigate it and found interesting thing:
/usr/local/lib/python3.8/dist-packages/mistralclient/api/v2/executions.py
class ExecutionManager(base.ResourceManager):
resource_class = Execution
def create(self, wf_identifier='', namespace='',
workflow_input=None, description='', source_execution_id=None,
**params):
self._ensure_not_empty(
workflow_identifier=wf_identifier or source_execution_id
)
But! in the webform we are using workflow_identifier instead of wf_identifier
/usr/local/lib/python3.8/dist-packages/mistraldashboard/workflows/forms.py
def handle(self, request, data):
try:
data['workflow_identifier'] = data.pop('workflow_name')
data['workflow_input'] = {}
for param in self.workflow_parameters:
value = data.pop(param)
if value == "":
value = None
data['workflow_input'][param] = value
ex = api.execution_create(request, **data)
FIX is to rename workflow_identifier to wf_identifier in the form like
data['wf_identifier'] = data.pop('workflow_name')
After that mistral-dashboard works fine with execution creating.