Twitter / diyism (1) DIYism: MongoDB的"$in:[…]"是交集(intersect),"$all:[…]"是子集(contain),"$elemMatch:{…}"是任意元素匹配,"$not:{$elemMatch:{$nin:[…]}}"才是超集(in或belong)

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DIYism: MongoDB的"$in:[…]"是交集(intersect),"$all:[…]"是子集(contain),"$elemMatch:{…}"是任意元素匹配,"$not:{$elemMatch:{$nin:[…]}}"才是超集(in或belong) Posted: MongoDB的"$in:[…]"是交集(intersect),"$all:[…]"是子集(contain),"$elemMatch:{…}"是任意元素匹配,"$not:{$elemMatch:{$nin:[…]}}"才是超集(in或belong)

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