.nil? I believe is the method you're looking for

On May 21, 4:05 pm, tjg <[email protected]> wrote:
> Hi, again. Still new to Hobo.
>
> I added an attribute accessor on a model to return a value formatted
> to 3 decimal places.
>
> For a 'show' view on this object, the accessor works nicely.
>
> But when Hobo is rendering a view of this object's parent with an
> inline edit form, and (I'm gathering) adding this field as a hidden
> field, it's throwing a 'can't convert nil into Float' error.
>
> How do I check if this attribute is nil when it's being rendered as a
> hidden field?
>
>   fields do
>     name                  :string
>     instrument_no    :float, :default => 0
>     timestamps
>   end
>
> def instrument_no
>     if [condition to detect that attribute is not nil to go here!]
>       "%0.3f" % read_attribute(:instrument_no)
>     end
> end
>
> Any pointers?
> Tim
>
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