Premature Validation Blocks Autocomplete Functionality in Slash Commands

[flixius]

Hello Discord API Team,

I have encountered an issue with how autocomplete functionality is handled in slash commands when required fields are left incomplete. The current behavior appears to validate the entire command, including required fields, before triggering the AutocompleteExecuted event. This validation results in an error and prevents the autocomplete handler from being called.

Steps to Reproduce:

1. Create a slash command with the following structure:

• A required field (currency) with predefined choices, e.g., "€" or "$".
• A second field (symbol) that uses isAutocomplete: true.

2. Attempt to interact with the symbol field's autocomplete before filling in the required currency field.

Observed Behavior:
Discord returns a 400 error with the message:

{
"code": "BASE_TYPE_CHOICES",
"message": "Value must be one of {'$', '\\u20ac'}."
}

The AutocompleteExecuted event is not triggered because the command fails validation for the currency field.

Expected Behavior:
The AutocompleteExecuted event for the symbol field should be triggered independently of the currency field's state.
Full command validation should only occur when the user submits the slash command, not during intermediate interactions like autocomplete.

Why This Is a Problem:
This behavior blocks valid use cases, such as dynamically populating the autocomplete options based on user input.
Users are forced to fill out unrelated required fields before accessing autocomplete, which negatively impacts the user experience.
Autocomplete is meant to assist users in filling out fields, but this implementation limits its utility.

Suggested Improvement:
Allow AutocompleteExecuted to trigger even if other required fields are incomplete or invalid.
Perform full validation only when the user submits the command.
This issue significantly impacts the usability of slash commands with autocomplete fields. I would appreciate it if the team could review and consider improving how validation is handled during intermediate interactions.

Thank you for your attention to this matter.

[flixius]

You can close/delete this post. It was a bug that has been fixed by Discord.
#7350 (comment)