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我想找到斯皮尔伯格所有的电影。 简单:
Movies.find({credits.who: "Spielberg"}).exec(function....)
它返回:
{
credits: [{
role: "director",
who: "Spielberg"
}, {
role: "writer",
who: "Spielberg"
}],
title : "The flying unicorn",
summary: "a unicorn flies"
}
{
credits: [{
role: "director",
who: "someone else"
}, {
role: "writer",
who: "Spielberg"
}],
title : "The falling unicorn",
summary: "a unicorn plumits to its death"
}
但我想要的结果也有汇总信息的新条目:
{role: "director", #ofCredits: 1}
{role: "writer", #ofCredits: 2}
我怎样才能做到这一点?