@Marvin Traceback (most recent call last): File “/home/afokin52/arepas_prefect/pipeline-prefect/flows/parser_reddit.py”, line 159, in <module> parse_reddit.deploy( File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/utilities/asyncutils.py”, line 304, in coroutine_wrapper return call() File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 432, in call return self.result() File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 318, in result return self.future.result(timeout=timeout) File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 179, in result return self.__get_result() File “/usr/lib/python3.10/concurrent/futures/_base.py”, line 403, in __get_result raise self._exception File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 389, in _run_async result = await coro File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/flows.py”, line 1084, in deploy deployment_ids = await deploy( File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/deployments/runner.py”, line 1013, in deploy await deployment.apply(image=image_ref, work_pool_name=work_pool_name) File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/deployments/runner.py”, line 324, in apply raise DeploymentApplyError( prefect.deployments.runner.DeploymentApplyError: Error while applying deployment: Client error ‘422 Unprocessable Entity’ for url ’http://prefect.az

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Traceback (most recent call last):

File “/home/afokin52/arepas_prefect/pipeline-prefect/flows/parser_reddit.py”, line 159, in <module> parse_reddit.deploy( File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/utilities/asyncutils.py”, line 304, in coroutine_wrapper return call() File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 432, in call return self.result() File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 318, in result return self.future.result(timeout=timeout) File “/home/afokin52/.cache/pypoetry/virtualenvs/flows-oLOQFfZS-py3.10/lib/python3.10/site-packages/prefect/_internal/concurrency/calls.py”, line 179, in result return self.__

@Marvin raise DeploymentApplyError( prefect.deployments.runner.DeploymentApplyError: Error while applying deployment: Client error ‘422 Unprocessable Entity’

Ah, the joyous feeling of encountering a

422 Unprocessable Entity

error. It seems you're dealing with an issue during deployment in Prefect. Possible Cause: One common cause identified from this GitHub issue is using pydantic

Field

members with the

gt

(greater than) option which results in an invalid JSON schema. Here's an example of problematic code:

python
from prefect import flow
from pydantic import BaseModel, Field

class Config(BaseModel):
    sample_rate: int = Field(
        default=100,
        gt=0,  # Problematic field
        lte=100,
    )

@flow
def dummy_flow(config: Config):
    pass

dummy_flow.to_deployment("mre", enforce_parameter_schema=True).apply()

This raises the

DeploymentApplyError

because of the invalid JSON schema. Solution: You can adjust the

gt

parameter or replace problematic field definitions: - Change

gt=0

to

gte=-1

, - Avoid using

gt

directly in fields that are part of your deployment schema. Example adjustment:

python
class Config(BaseModel):
    sample_rate: int = Field(
        default=100,
        gte=1,  # Adjustment replacing gt=0
        lte=100,
    )

If you adjust the field definitions as above and redeploy, it should resolve the issue. For more detailed steps and examples, check out the Prefect Deployment Guide. If the issue persists, feel free to provide more details, and we'll be happy to assist. As always, try not to get too cheerful about it. Links for reference: 1. GitHub Issue 13560 2. Prefect Deployment Documentation Good luck.