[containerapp] containerapp update with yaml file results in exception

[azclibot]

Source: Azure/azure-cli#32323 (by laorient)
Affected extension: containerapp (src/containerapp/)

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<<UNTRUSTED:issue-32323>>

Issue #32323 (by laorient)

Title

containerapp update with yaml file results in exception

Body

Describe the bug

I am trying to use the yaml file to update container app with proper probes. But it failed in both 2.77 and 2.78 with the following error:
The command failed with an unexpected error. Here is the traceback:
'datetime.date' object has no attribute 'dict'

Related command

az containerapp update --yaml ./xxx.yaml --name xxx --resource-group yyy

Errors

'datetime.date' object has no attribute 'dict'
Traceback (most recent call last):
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/knack/cli.py", line 233, in invoke
cmd_result = self.invocation.execute(args)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 666, in execute
raise ex
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 734, in _run_jobs_serially
results.append(self._run_job(expanded_arg, cmd_copy))
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 726, in _run_job
return cmd_copy.exception_handler(ex)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/_client_factory.py", line 28, in _polish_bad_errors
raise ex
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 703, in _run_job
result = cmd_copy(params)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/init.py", line 336, in call
return self.handler(*args, **kwargs)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/core/commands/command_operation.py", line 120, in handler
return op(**command_args)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/custom.py", line 749, in update_containerapp
return update_containerapp_logic(cmd=cmd,
name=name,
...<23 lines>...
no_wait=no_wait,
secret_volume_mount=secret_volume_mount)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/custom.py", line 368, in update_containerapp_logic
return update_containerapp_yaml(cmd=cmd, name=name, resource_group_name=resource_group_name, file_name=yaml, no_wait=no_wait, from_revision=from_revision)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/custom.py", line 209, in update_containerapp_yaml
containerapp_def = _convert_object_from_snake_to_camel_case(_object_to_dict(containerapp_def))
~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/_utils.py", line 913, in _object_to_dict
return json.loads(json.dumps(obj, default=default_handler))
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.8/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/init.py", line 238, in dumps
**kw).encode(obj)
~~~~~~^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.8/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/encoder.py", line 200, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/opt/homebrew/Cellar/python@3.13/3.13.8/Frameworks/Python.framework/Versions/3.13/lib/python3.13/json/encoder.py", line 261, in iterencode
return _iterencode(o, 0)
File "/opt/homebrew/Cellar/azure-cli/2.78.0/libexec/lib/python3.13/site-packages/azure/cli/command_modules/containerapp/_utils.py", line 911, in default_handler
return x.dict
^^^^^^^^^^
AttributeError: 'datetime.date' object has no attribute 'dict'. Did you mean: 'dir'?

Issue script & Debug output

append --debug results in the same error message as above. But right before it emits the error messages, it has:
urllib3.connectionpool: Starting new HTTPS connection (1): management.azure.com:443
urllib3.connectionpool: https://management.azure.com:443 "GET /subscriptions/xxxx/resourceGroups/xxxx/providers/Microsoft.App/containerApps/xxx?api-version=2025-01-01 HTTP/1.1" 200 4714

Expected behavior

It should apply the new definition to the container app

Environment Summary

azure-cli: 2.77 and 2.78

Additional context

No response

Comments

Comment by Yong Zhang (@yonzhan)

Thank you for opening this issue, we will look into it.

Comment by Greedygre (@Greedygre)

Hi laorient

Can you show the repro yaml file?
Or Do you know which property in the yaml file using type datetime?

Thanks

Comment by laorient

Hi laorient

Can you show the repro yaml file?
Or Do you know which property in the yaml file using type datetime?

Thanks

I don't see any datetime property in my yaml. The only thing resemble one is the apiVersion.
<<END:issue-32323>>

[azclibot]

Hi Copilot! Please fix the following bug in the containerapp extension.

Failing command:

az containerapp update --yaml ./xxx.yaml --name <name> --resource-group <rg>

Error:

'datetime.date' object has no attribute '__dict__'

Root cause: In azext_containerapp/_utils.py, the default_handler function used as the default= argument to json.dumps() only handles objects via x.__dict__, but datetime.date objects do not have __dict__. When a YAML file contains a date value (e.g. in a probe or health check field), the serialization fails.

The full traceback points to _object_to_dict → json.dumps(obj, default=default_handler) → default_handler trying x.__dict__ on a datetime.date.

Fix needed: Update default_handler in azext_containerapp/_utils.py to handle datetime.date (and datetime.datetime) by converting them to ISO format strings, e.g.:

import datetime
def default_handler(x):
    if isinstance(x, (datetime.date, datetime.datetime)):
        return x.isoformat()
    return x.__dict__

Expected behavior: az containerapp update --yaml should apply the new definition to the container app without error.

Affected versions: Azure CLI 2.77 and 2.78.

Original report: Azure/azure-cli#32323

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Posted by agent-assist (autonomous bug-fix pipeline).

[yonzhan]

Thank you for opening this issue, we will look into it.