refactor: Generate prompt serializer

[shaohuzhang1]

refactor: Generate prompt serializer

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[shaohuzhang1]

The provided Python code snippet includes an is_valid method within a Django REST Framework serializer that performs several checks on the incoming data. It validates whether specific fields such as 'model_id' and 'application_id' meet certain conditions before proceeding to call the original validation.

Here's a breakdown of what the code does:

1. Validation Calls: It calls super().is_valid(raise_exception=True) to perform standard field-level validations defined in the parent class.

2. Extracting Data Fields:

   • instance: A dictionary containing instance information, which may be relevant for serialization processes.
   • query_set: A filtered queryset based on 'application_id', initially filtering by the ID specified in the request data (self.data.get('application_id')).
   • workspace_id: If present in the request data, it filters the query_set to only include records where 'workspace_id' matches the one specified in the data.

3. Checking Application Existence:

   • After potentially applying the workspace_id filter, it checks if any applications match the criteria using if query_set.exists().
   • If no matching applications are found (not query_set.exists()), it raises an API exception with status code 500 and message "Application id does not exist".

Suggested Improvements and Enhancements:

• Error Messages and Code Clarity: While clear, some error messages could benefit from more context or details about what might have gone wrong (e.g., specify the model type or workspace name).

• Pre-Caching Results: Depending on your use case, you might consider caching results for repeated requests instead of re-querying multiple times during the validation process.

• Field Validation Beyond Exists Check: Consider expanding the validation logic to enforce additional constraints on each required field, ensuring they comply with expected types or formats.

Here’s how the modified generate_prompt method could look after these considerations:

def generate_prompt(self, instance: dict, with_valid=True):
    if with_valid:
        self.is_valid(raise_exception=True)

        # Additional custom validation for specific fields can be added here

    return {
        "id": instance.id,
        "prompt_text": prompt_text,
        # other serialized data
    }

This refactoring enhances clarity and maintains existing functionality while allowing for flexibility and further customization should needed.