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Raise an error if we try to delete a model with existing instances

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This commit is contained in:
mike cullerton 2022-06-13 15:40:03 -04:00
parent 512ac5f3c1
commit da1191ab48
1 changed files with 7 additions and 0 deletions
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7
src/spiffworkflow_backend/services/process_model_service.py
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@ -4,8 +4,11 @@ import os
import shutil
from typing import List
from flask_bpmn.api.api_error import ApiError
from spiffworkflow_backend.models.process_group import ProcessGroup
from spiffworkflow_backend.models.process_group import ProcessGroupSchema
from spiffworkflow_backend.models.process_instance import ProcessInstanceModel
from spiffworkflow_backend.models.process_model import ProcessModelInfo
from spiffworkflow_backend.models.process_model import ProcessModelInfoSchema
from spiffworkflow_backend.services.file_system_service import FileSystemService
@ -41,6 +44,10 @@ class ProcessModelService(FileSystemService):
def process_model_delete(self, process_model_id: str):
"""Delete Procecss Model."""
instances = ProcessInstanceModel.query.filter(ProcessInstanceModel.process_model_identifier == process_model_id).all()
if len(instances) > 0:
raise ApiError(code='existing_instances',
message=f'We cannot delete the model `{process_model_id}`, there are existing instances that depend on it.')
spec = self.get_spec(process_model_id)
if not spec:
return