Arel method that dynamically creates a blank condition named function that can me used to check a table column for blank?

arel_blank_condition.rb

def blank_condition_for(model:, attr:)
  table = model.arel_table
  trimmed_attr_value = Arel::Nodes::NamedFunction.new('TRIM', [table[attr]])

  table[attr].eq(nil).or(trimmed_attr_value.eq(''))
end

# Usage
model = User
attr = :edipi
blank_condition = blank_condition_for(model:, attr:)

User.where(blank_condition)