Hello, everybody! I have simple one to many relationship Parent-> Child. I want each parent entity to have one predefined Child entity. To do it I iterate through all Parent entities (using map-reduce framework) and add one Child entity. There problem is- to maintain one to many relationship I have to set up child_INTEGER_IDX field of Child entity. I guess it should be number of children which already belong to this Parent entity. The question is how can I get that number? In map- reduce framework I know about Parent entity only. Any ideas how to solve this problem?
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