小编Ami*_*Gur的帖子

我的表项目的形式

function addDoc(movie,cb){
    var params = {
        TableName: "Movies",
        Item: {
            "year":  movie.year,
            "title": movie.title,
            "info":  movie.info,
            "genres" : movie.info.genres || []
        }
    };
    docClient.put(params, function(err, data) {
        bar.tick(1)
        i++;
        cb(err);
    });
}

async.eachLimit(allMovies,50,addDoc,function (err) {
    console.log(err)
    console.log("done inserting " + i + " movies");
});

我正在运行此代码:

var params = {
    TableName : "Movies",
    //ProjectionExpression:"#yr, title, genres, info.actors[0]",
    KeyConditionExpression: "#yr = :yyyy and contains(genres, :g1)",
    ExpressionAttributeNames:{
        "#yr": "year"
    },
    ExpressionAttributeValues: {
        ":yyyy":1992,
        ":g1" : "Drama"
    },
    //Select : "COUNT"
}; …