@Marvin is there any way to get a SecretStr field to display as a multi-line text input on my custom block?

To help you with the customization of a SecretStr field in your Prefect block, I need to determine the Prefect version you are using, as the solution can differ between Prefect 2.x and Prefect 3.x. Could you please confirm your Prefect version?

@Marvin 3.x

Based on the Prefect 3.x documentation and the current GitHub issues, it seems that there isn't a built-in way to directly configure a

SecretStr

field to display as a multi-line text input. Prefect's

SecretStr

and

SecretDict

are designed to obfuscate secret information, focusing more on security rather than UI flexibility. However, you can customize the way your custom block's fields display by implementing metadata and using Prefect’s flexible UI features for block development. Although the documentation mentions block type metadata for controlling display, it doesn't explicitly mention multiline inputs for secret fields. Here are steps you could consider, based on the current capabilities of Prefect: 1. Custom Field Types: Consider using a custom field type that obfuscates the input visually in your application code, while allowing it to be stored in a simple text area. 2. UI Enhancements: If the Prefect UI doesn't support multiline out of the box for SecretStr through its metadata, consider submitting a feature request to the Prefect GitHub repository. For further information and context, you can explore the following resources from the documentation: - Prefect 3.x Block Development Guide - Prefect 3.x Inputs Handling If you have more detailed requirements or potential workarounds, feel free to share them, and I'll be glad to help further!

@Marvin show me how to use a custom field type that obfuscates the input visually in my application code, while allowing it to be stored in a simple text area

To create a custom field type that obfuscates the input visually while allowing it to be stored as plain text in a Prefect block, you can utilize Prefect's extensibility with Python's Pydantic models. Here's a simple example of how you might achieve this: 1. Define a Custom Field: Use Pydantic's

BaseModel

to define a custom field that will handle the obfuscation. 2. Integrate with Prefect Block: Create a Prefect block that includes this custom field type. Here is a basic implementation outline using Python:

python
from pydantic import BaseModel, validator
from prefect.blocks.core import Block

class ObfuscatedStr(str):
    """Custom string type that obfuscates its value when printed."""
    def __repr__(self):
        return "****"

class SecretField(BaseModel):
    """Model representing a field that stores secrets securely."""
    secret_value: ObfuscatedStr

    @validator('secret_value', pre=True)
    def check_secret_value(cls, v):
        # Ensure that value is stored in the appropriate format
        return ObfuscatedStr(v)

class MyCustomBlock(Block):
    """
    Prefect block that uses a custom secret field.
    Here, the secret field will not show its value when printed.
    """
    secret_info: SecretField

# Example usage
my_block = MyCustomBlock(secret_info={"secret_value": "my_very_secret_password"})
print(my_block)

In this example: - ObfuscatedStr is a custom string type that overrides the

__repr__

method to return "****", ensuring that the secret doesn't display in plain text when the object is printed. - SecretField uses this custom string type to store secrets. This approach allows you to control how secret data is displayed without storing it in an encrypted or obfuscated form under the hood, purely affecting its representation in the UI or logs. For further guidance on creating and registering custom blocks in Prefect, refer to the Prefect 3.x Block Development Guide.

@Marvin I'm simply trying to force the height of the input field to be more than one line. is this possible?

Based on the Prefect 3.x capabilities and documentation, there isn't a direct configuration or property to set an input field's height to span multiple lines in the Prefect UI. Prefect's primary focus is on functionality related to flows and task orchestration rather than UI customization. However, if you are handling Prefect blocks and have control over the application that integrates with these blocks, you might consider using custom HTML/CSS to present a multi-line input area when rendering these blocks in your front end. For a solution directly within Prefect, consider these approaches: 1. Submit Feature Request: Since this feature isn't natively supported, you could submit a feature request on Prefect's GitHub repository, suggesting the enhancement to allow more flexible UI configurations for input fields. 2. Custom Frontend Integration: If you have a custom UI where the Prefect block is utilized, consider using a

<textarea>

element styled with CSS to achieve a multi-line input. For more specific requests regarding Prefect’s block capabilities, you may refer to Prefect's Block Development Guide or reach out to the community for potential workarounds. If there are any updates on Prefect's capabilities that could allow this functionality, they will likely be posted in future release notes or community forums, so keep an eye on those channels for new features!