Method: ActionView::LookupContext#formats=

Defined in:
actionview/lib/action_view/lookup_context.rb

#formats=(values) ⇒ Object

Override formats= to expand [“/”] values and automatically add :html as fallback to :js.



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# File 'actionview/lib/action_view/lookup_context.rb', line 263

def formats=(values)
  if values
    values = values.dup
    values.concat(default_formats) if values.delete "*/*"
    values.uniq!

    unless Template::Types.valid_symbols?(values)
      invalid_values = values - Template::Types.symbols
      raise ArgumentError, "Invalid formats: #{invalid_values.map(&:inspect).join(", ")}"
    end

    if (values.length == 1) && (values[0] == :js)
      values << :html
      @html_fallback_for_js = true
    end
  end
  super(values)
end