You are asigning foo to the name field... and nothing to the data field...
in your model, you declared data as a requires field... if you don't assign
anything to it, it's nil... and data must have a value... that's why.
On May 23, 2013 11:18 AM, "Nicholas Wieland" <nicholas.wiel...@gmail.com>
wrote:
> Hi *, I have a model like this:
>
> class Trait
> include DataMapper::Resource
>
> property :id, Serial
> property :name, Slug, :required => true
> property :data, Decimal, :required => true
>
> has n, :items, :through => :assignments
> has n, :assignments
> end
>
> and if I do:
>
> irb(main):029:0> t = Trait.new
> => #<Trait @id=nil @name=nil @data=nil>
> irb(main):030:0> t.data = 1.0
> => 1.0
> irb(main):031:0> t
> => #<Trait @id=nil @name=nil @data=nil>
> irb(main):032:0> t.name = "FOO"
> => "FOO"
> irb(main):033:0> t
> => #<Trait @id=nil @name="foo" @data=nil>
> irb(main):034:0> t.save
> => false
> irb(main):035:0> t.errors.inspect
> => "#<DataMapper::Validations::ValidationErrors:0x00000005bb5e40
> @resource=#<Trait @id=nil @name=\"foo\" @data=nil>, @errors={:data=>[\"Data
> must not be blank\"]}>"
>
> can someone explain me why I'm not able to set the data attribute?
>
> TIA,
> ngw
>
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