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Re: why not true when testing for equality with a null query
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Re: why not true when testing for equality with a null query


  • Subject: Re: why not true when testing for equality with a null query
  • From: Pierre Bernard <email@hidden>
  • Date: Thu, 7 Dec 2006 22:54:46 +0100

To query for NULL values you need to use NSKeyValueCoding.NullValue

Pierre


On 7 Dec 2006, at 18:32, Baiss Eric Magnusson wrote:

Wouldn't the following fetch the record if I don't set any value for the 3 <$> variables, and the record in the DB has <null> for the 3 fields?

	((areaID = $areaID) or (stateID = $stateID) or (groupID = $groupID)
			 or ((areaID = stateID) and (areaID = groupID)))

Do I have to set the bindings if the variable is null? Because I do: ( thus not setting the bindings for the $areaID)

    	public WODisplayGroup			groups;
	if ( curArea != null )
		groups.queryBindings().setObjectForKey( curArea.areaID(), "areaID");
	etc.
----
Baiss Eric Magnusson
<http://www.Track-Your-Finances.com>
<http://www.CascadeWebDesign.com>


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 >why not true when testing for equality with a null query (From: Baiss Eric Magnusson <email@hidden>)

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