Asynchronous operations in Table.hook('reading')

[ptgolden]

Is there any way to perform asynchronous operations when hooking into a table read? I have certain objectStores that contain objects with fields that are just IDs referring to objects in other objectStores. I was hoping I could use the reading hook to automatically dereference those fields, which would require further database reads. As far as I can tell, the function in the reading hook must only contain synchronous operations.

I can do the dereferencing somewhere other than a read hook, of course, but there seemed like a nice place for it.

[dfahlander]

It's not possible in current version. I've thought about the scenario and
it would be possible if the framework accepted a Promise instance from the
reading hook.

I would love to implement that in a future version but I can't guarantee
when. Tell me if it's a showstopper for you and I can see what I can do to
prioritize it.

David
Den 21 jul 2014 22:49 skrev "Patrick Golden" notifications@github.com:

Is there any way to perform asynchronous operations when hooking into a
table read? I have certain objectStores that contain objects with fields
that are just IDs referring to objects in other objectStores. I was hoping
I could use the reading hook to automatically dereference those fields,
which would require further database reads. As far as I can tell, the
function in the reading hook must only contain synchronous operations.

I can do the dereferencing somewhere other than a read hook, of course,
but there seemed like a nice place for it.

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#14.

[ptgolden]

Great- that's what I figured. I'll look forward to it in a future version.

For now, I'll just make my own add-on that will do what I need to do.

[dfahlander]

F.Y.I I am currently working on a new version of Dexie that will support asyncronic hooks as well as a map() method on Collection that will accept asyncronic mapping by returning a Promise.

[dfahlander]

Had to stash the changes for this change but it's still something that I would like to se fixed. Seems this will not make it into Dexie 1.x for backward compatibility reasons.