"sport": "NFL", "team_id": 5, "week_num": 6, "meta": { .... more data ...., "season_year": 2013 } 变为 "sport": "NFL", "team_id": 5, "week_num": 6, "season_year": 2013, "meta": { .... more data ...., "season_year": 2013 } db.yourCollection.find({}).forEach(function(doc) { doc.season_year = doc.meta.season_year; db.yourCollection.save(doc); });
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转载自wang-peng1.iteye.com/blog/1972486
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