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Type: New Feature
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Resolution: Done
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Priority: Major - P3
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Affects Version/s: None
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Component/s: None
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None
Currently, the only 2 accumulators we do not support are $push and $addToSet.
We could implement these in a simple manner with the following syntax.
For $push:
{ $group: {_id: "$State", Cities: { $push: "$City" } } }
.Group(x => x.State, g => new { _id = g.Key, Cities = new List<string>(g.Select(x => x.City)) }
And for $addToSet:
{ $group: {_id: "$State", Cities: { $addToSet: "$City" } } }
.Group(x => x.State, g => new { _id = g.Key, Cities = new HashSet<string>(g.Select(x => x.City)) }