Would anyone comment on (newly created) pull request 31874 
<https://github.com/rails/rails/pull/31874>? The change to handling of 
block elements in the params filter list enables a strategy to white-list, 
rather than black-list the params.

It *does* change behavior. I had to alter a test.

Before I do any more work on this, I want to know if it is looked upon 
favorably and would be at all likely to be merged.

On Wednesday, April 5, 2017 at 4:05:37 PM UTC-3, Bruno Facca wrote:
> Is there any reason why config.filter_parameters uses a blacklist 
> approach? Why not convert it into a whitelist?
> Whitelisting tends to be safer than blacklisting as developers may forget 
> to blacklist parameters containing sensitive data.
> Kind Regards,
> Bruno Facca

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