Prefetch related solr documents and then lazily convert to SpeedyAF proxy objects #9
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For objects with a large number of related child or parent objects SpeedyAF's lazy approach can result in hundreds or thousands of solr queries for individual documents. This PR figures out what all of these will be and fetches all of the documents in one solr request. It sets attributes on the proxy object with the pre-fetched solr documents then when a relation is later accessed it will cast it into a proxy object. For a show view of a particular object in production Avalon at IU these changes reduce the amount of time spent in solr requests from about 30s to about 0.5s.