ComfyUI Node: JNodes_AddOrSetMetaDataKey

JNodes_AddOrSetMetaDataKey:

The JNodes_AddOrSetMetaDataKey node is designed to help you manage metadata within your AI art projects. This node allows you to add or update key-value pairs in the metadata of your project files, ensuring that important information is stored and easily accessible. By using this node, you can efficiently organize and maintain metadata, which can be crucial for tracking project details, versioning, and other essential data. The primary function of this node is to either add a new metadata key with a specified value or update the value of an existing key, making it a versatile tool for metadata management.

JNodes_AddOrSetMetaDataKey Input Parameters:

key

The key parameter specifies the name of the metadata key you want to add or update. This is a string value and should be chosen to clearly represent the type of information it holds. For example, you might use "Author" or "CreationDate" as keys. The default value is an empty string, and it does not support multiline input.

value

The value parameter is the content you want to associate with the specified key. This is also a string value and can contain multiple lines of text, making it suitable for detailed descriptions or notes. The default value is an empty string, and it supports multiline input to accommodate more extensive information.

extra_pnginfo

The extra_pnginfo parameter is a hidden input that represents the existing metadata dictionary where the key-value pair will be added or updated. This parameter is typically managed internally and does not require user input.

JNodes_AddOrSetMetaDataKey Output Parameters:

BOOLEAN

The output of this node is a boolean value that indicates whether the operation was successful. A value of True means that the key-value pair was successfully added or updated in the metadata, while False indicates that an error occurred during the process.

JNodes_AddOrSetMetaDataKey Usage Tips:

• Ensure that the key parameter is unique and descriptive to avoid confusion with other metadata entries.
• Use the value parameter to store detailed information, taking advantage of its multiline capability for comprehensive descriptions.
• Regularly update metadata to keep track of changes and maintain an organized project history.

JNodes_AddOrSetMetaDataKey Common Errors and Solutions:

KeyError: 'key'

• Explanation: This error occurs if the specified key is not found in the existing metadata dictionary.
• Solution: Ensure that the key you are trying to update exists in the metadata. If you are adding a new key, this error should not occur.

TypeError: 'NoneType' object is not subscriptable

• Explanation: This error occurs if the extra_pnginfo parameter is None or not properly initialized.
• Solution: Make sure that the extra_pnginfo parameter is correctly passed and initialized as a dictionary before using the node.

ValueError: Invalid key or value

• Explanation: This error occurs if the key or value provided is not a valid string.
• Solution: Verify that both the key and value parameters are valid strings and not empty or null.

Exception: General error

• Explanation: This is a catch-all error for any other issues that may arise during the execution of the node.
• Solution: Check the error logs for more details and ensure that all input parameters are correctly set and valid.