Very possible.



Basically, I have this structure:




Question

  Answer

    Editable




Question gets a cursor that it uses only to get the id of the question to show, 
and uses a ref-cursor to grab the actual data from a friendly API.




It then passes a sub cursor to Answer (because a Question may have N answers), 
which in turn uses editable.




There is one pattern (creating a new question) where I get an exception thrown 
because parent is null (which prompted this email, and it turns out has nothing 
to do with ref-sub-cursor implementing IOmRef, so I apologize for the 
increasingly misnamed subject).




Unclear how I get into that state, or what I can do to debug it.




—Todd

On Fri, Oct 31, 2014 at 4:23 PM, David Nolen <[email protected]>
wrote:

> Sub cursors from an IOmRef instance won't themselves be IOmRefs. For
> the time being we're going to stick to this.
> I'd like to hear a lot more details about the use case before changing
> my mind. It seems to me if you really need sub cursors to be ref
> cursors you are not writing the API that you need for you application
> and piggiebacking on ref cursors in an unintended way.
> David
> On Sat, Nov 1, 2014 at 12:10 AM, Todd Berman <[email protected]> wrote:
>> I am running into an issue where it appears that a ref-sub-cursor 
>> (https://github.com/swannodette/om/blob/master/src/om/core.cljs#L763) should 
>> implement IOmRef, as it appears that -refresh-deps! is being called against 
>> it, which won't work.
>>
>> I am able to make this happen when creating a reference cursor, passing a 
>> sub cursor to a component, and then having that get passed to a third 
>> component (basically, following the editable paradigm from the tutorials).
>>
>> I am still a relative newbie when it comes to the Om internals, so unclear 
>> why this is happening in one case, but not in others.
>>
>> --Todd
>>
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