result_asdf: Extract a data.frame from Elastic query results
In jacob-ogre/esadocs: A Search Engine for Endangered Species Act Documents

Elastic query results are returned as a complex nested list that is reasonably well-structured but a pain to parse. The basic Search function of elastic has a flag, asdf, to return the results as a data.frame, but there is no generic function to extract the data.frame. This function is tailored to the esadocs index, used in testing, which includes a field (Scientific_Name) that is an array in elasticsearch (list in R) and doesn't coerce to a single variable just using as.data.frame(res).