False error with ComparisonToBoolean and Ecto query?

[James Lee]

I created a function on an Ecto model as follows:

  def not_foo?(query \\ SomeModel) do
    from r in query,
    where: r.foo == false
  end

This caused dogma to fail with: ComparisonToBoolean: Comparison to a boolean is pointless. This seems to be incorrect, although perhaps theres another way of writing that query that I don't understand yet.

[Louis Pilfold]

Hm. In Ecto's DSL it isn't pointless it seems. Perhaps we can try and detect if we're in this DSL somehow.

[James Lee]

It seems there is an alternative syntax, although most examples I've seen use the original syntax above. Anyhow, this seems like it is a reasonable workaround for my situation:

  def not_foo?(query \\ SomeModel) do
    from r in query,
    where: not(r.foo)
  end