Re: [Zope] Detecting a NULL Value

27 Feb 2004


      On Fri, 2004-02-27 at 14:55, Asad Habib wrote:
...
I have a field in my MySQL database which is allowed to be null and has a
value of NULL as default. I am retrieving this field and numerous others
using a call to dtml-in. After the retrieval, I would like to determine
what this value is inside my DTML document/method. What is the equivalent
of NULL in Zope? Is it a value of 'None'?
I am using the following code but it doesn't work.
<dtml-if expr="undergraduate_projects_directed == 'None'">
   <dtml-call "REQUEST.set('undergraduateProjectsDirected', 'Hello')">
</dtml-if>
I use PostgreSQL and Oracle.
For each of them, I generally do this :

  <dtml-unless undergraduate_projects_directed>
    ...
  </dtml-unless>


Thierry

Re: [Zope] Detecting a NULL Value

FLORAC Thierry