AQL how to collect documents into arrays under their collection name?

问题

In answer to previous questions was shown how to collect documents under their collection names but there was a clear constraint that query returns only one document for each collection.

@CoDEmanX asked what if the query returns many documents of the same collection?

回答1:

Will have to rework query to use aggregation:

FOR doc IN ANY "vertex/key" edge_collection
COLLECT collection = PARSE_IDENTIFIER(doc).collection INTO collected
RETURN MERGE({
    [collection]: collected[*].doc
})

• Group documents by their collection name COLLECT collection = PARSE_IDENTIFIER(doc).collection INTO collected
• Form document with collection name as property and array of collected documents as value { [collection]: collected[*].doc }
• Merge results into single document

来源：https://stackoverflow.com/questions/48971984/aql-how-to-collect-documents-into-arrays-under-their-collection-name