Anvil serializable across server to front-end

Anvil Q&A
1

I thought I would test and convert non-serialiazable value before being passed back to the front-end.

This one liner does quite a lot. The function ensure_anvil_serialiazable(item) test wether anvil will be ok with the value. At this stage, it prints out the type of the item and simply return the item.

      result = [{indx: {"value": ensure_anvil_serializable(x[indx].toPython()), "type": str(type(x[indx]))} for indx in x.labels} for x in res]

When I return result, I get the message

anvil.server.SerializationError: Cannot serialize return value from function. You can only pass strings, numbers, arrays, lists, LiveObjects and Media to or from server functions

Any ideas how to fix this?

2

All is fine. The function was working, but different test data caused this problem.

3

I’m curious. Where did you find this function?

4

HaHa - I’m writing my own to ensure that I can control the way in which Python objects are returned.

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