Why Doesn't My Discord Bot Process Commands After Implementing a Custom `on_message()`?

Why does on_message() Stop Commands from Working?

When implementing a custom on_message() event within a Python Discord bot, users may encounter an issue where commands, such as -ping or -add, fail to execute. This can be puzzling, especially if the bot appears to function without exceptions.

The underlying reason for this behavior lies in the interaction between the on_message() event and command processing. By default, the Discord.py library includes a built-in on_message() event that handles incoming messages and processes any commands present within them. However, when you override the default on_message() with a custom one, you effectively prevent the automatic command processing from taking place.

To resolve this issue, you must explicitly add a call to bot.process_commands(message) at the end of your custom on_message() event. This ensures that the bot still processes commands as intended. Here's an example:

@bot.event
async def on_message(message):
    # your custom logic here

    await bot.process_commands(message)

This addition allows the bot to handle both your custom logic and any commands that users might enter. The bot.process_commands() function essentially does what the built-in on_message() event handles automatically when no custom override is present.

By following this recommendation, you can enable your bot to execute commands alongside any custom processing you have implemented in your on_message() event handler.

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