bson.A{0, nil}这种写法是等于 0 或者不存在吗？

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a := bson.M{"selfOnly": bson.M{"$in": bson.A{0, nil}}}
b := bson.M{"$or": []bson.M{{"selfOnly": bson.M{"$exists": false}}, {"selfOnly": 0}}}

这两种写法是一样的吗？我没搜到这种用法

1 replies

mmnnyycc

May 23, 2022