#2352 BLOC Untriag: datastore stopped returning results

[Zarro Boogs per Child]

#2352: datastore stopped returning results
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 Reporter:  tomeu      |       Owner:  bcsaller 
     Type:  defect     |      Status:  new      
 Priority:  blocker    |   Milestone:  Untriaged
Component:  datastore  |     Version:           
 Keywords:             |    Verified:  0        
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 Probably sugar sent bad data to the datastore, but we really need better
 messages in the logs (although this has gotten much better) and some data
 validation.

 If the datastore stops returning results because an activity sent a field
 as None (or something similar), we are in a very bad situation.

 Logs attached.

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Ticket URL: <https://dev.laptop.org/ticket/2352>
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