Nested query DSL in casbah?

Question

How can I do a nested and/or query in casbah?

For example:

val q =  $and( "a"->"b", $or("e"->"f", "e"->"g"), $or("c"->"d", "c"->"e") )

This sample doesn't compile, but that's the idea I'm trying to achieve.

Answer 1

文档说：“ $ or运算符对两个或多个表达式的数组执行逻辑或运算”，因为它是数组，所以您应该使用Seq来分隔条件。

coll.find(MongoDBObject("a"->"b","$or"->Seq(Map("e"->"f"),Map( "e"->"g")),"$or"->Seq(Map("c"->"d"),Map( "c"->"e"))))