First of all let's target your simple query $expr: { follower: Types.ObjectId(userId), }. This does not work since $expr does not know how ... ... <看更多>

In this video we will see how to use $ expr operator with $cond to query the documents with conditions in MongoDB … Show more. Show more ... ... <看更多>

In this video we will see about the evaluation operators $ expr and $regex operators for querying the documents - MongoDB … Show more. ... <看更多>

So i've implemented "exprOp" method throught QueryBuilder & Expr for both Query and Aggregation parts that implement usage of mongodb $expr operator also ... ... <看更多>

Translate a MongoDB LINQ query. ... MongoQueryTranslator.Translate Method (MongoQueryProvider, Expression). Translate a MongoDB LINQ query. ... <看更多>

Package expr encapsulates operations of aggregation framework. ... ConcatArrays encapsulates MongoDB operation $concatArrays. ... <看更多>

Aggregation sorts the documents based on the inputs INPUT_EXPRESSION and SORT_ORDER. The input expression is matched with the ... ... <看更多>