Question

Let’s say I have two entities, a House:

component
{
    property name="Owner" cfc="Owner" fieldtype="many-to-one";
}

And an Owner:

component
{
    property name="Name";
}

A House may have an Owner, but doesn’t need to. I have a House associated with an Owner, but now I want to remove the association. I’ve tried the following code:

 var house = entityLoadByPK("House", 13);
 house.setOwner('');
 entitySave(house);

But I get an exception saying that '' cannot be converted to an id, which makes sense. However, although ColdFusion has a concept of null/undefined, it looks like you can’t actually create a null value, only check for them. How would I remove the association in this case?

Answer 1

If you have your relationship defined correctly then I believe what you are looking for is:

house.setOwner(javaCast('null', ''));