validation check

Hi…
I have a select which I want to validate if a value is selected, otherwise not.

<%= f.collection_select :parent_id, Project.mainprojects.active, :id, :project_name, :include_blank => ‘Partproject?’, :allow_nil => true%>

how is the correct way…?

tried…in model
if :project_id
if :project_id?
if :project_id.blank?

etc . etc.
But nothing works…

so the name of the input is SOMETHING[parent_id] right?

then you have to validate

if self.parent_id.blank?

Javier

So what is the value of project_id that you are trying to test for?
If you are not sure then have a look at the Rails Guide on debugging
which will show you techniques that you can use to debug your code.
Then you can find out what is the value of project_id and why your
tests are not working.

Colin

Hi Colin..

<%= f.collection_select :parent_id, Project.mainprojects.active, :id, :project_name, :include_blank => 'Partproject?', :allow_nil => true%>

the project_id .. 1, 2 etc. or ""

"parent_id"=>"1"
"parent_id"=>""

Werner

Hi Colin..

Please don't top post, it makes it difficult to follow the thread.
Insert your reply at appropriate points in previous message. Thanks.

<%= f.collection_select :parent_id, Project.mainprojects.active, :id, :project_name, :include_blank => 'Partproject?', :allow_nil => true%>

the project_id .. 1, 2 etc. or ""

"parent_id"=>"1"
"parent_id"=>""

You said in your initial post that you were testing it in the model.
What do you mean by "parent_id" => ""? In the model it should
probably be an attribute self.parent_id, but in that case I would
expect it to be nil if it is a foreign key.

If you are trying to test it in the controller then it depends what
you are trying to do. Show us the code you have tried (for the
action, not just one line out of context).

Colin