无法使用res.send()使用Express与节点发送号码

我正在尝试使用expression式在节点中获得“imdb评级”,而且我正在挣扎。

movies.json

[{ "id": "3962210", "order": [4.361276149749756, 1988], "fields": { "year": 2015, "title": "David and Goliath", "director": "Timothy A. Chey" }, "doc": { "_id": "3962210", "_rev": "1-ac648e016b0def40382d5d1b9ec33661", "title": "David and Goliath", "year": 2015, "rating": "PG", "runtime": "92 min", "genre": ["Drama"], "director": "Timothy A. Chey", "writer": ["Timothy A. Chey"], "cast": ["Miles Sloman", "Jerry Sokolosky", "Makenna Guyler", "Paul Hughes"], "poster": "http://ia.media-imdb.com/images/M/MV5BMjA3OTQ4NDc4MV5BMl5BanBnXkFtZTgwNDYwMzA1MjE@._V1_SX300.jpg", "imdb": { "rating": 8.4, "votes": 138, "id": "tt3962210" } } }, { "id": "251656", "order": [3.489020824432373, 686], "fields": { "year": 1999, "title": "David Cross: The Pride Is Back", "director": "Troy Miller" }, "doc": { "_id": "251656", "_rev": "1-2d0762776874f94af8f2d76e5991b529", "title": "David Cross: The Pride Is Back", "year": 1999, "rating": null, "runtime": "55 min", "genre": ["Comedy"], "director": "Troy Miller", "writer": ["David Cross"], "cast": ["David Cross", "Molly Brenner", "Amiira Ruotola"], "poster": "http://ia.media-imdb.com/images/M/MV5BODcwMjMxOTU4OF5BMl5BanBnXkFtZTgwODE0MTc4MTE@._V1_SX300.jpg", "imdb": { "rating": 7.9, "votes": 380, "id": "tt0251656" } } }] 

结果

res.send(result.rows[0].doc.imdb); 返回{"rating":8.4,"votes":138,"id":"tt3962210"}

res.send(result.rows[0].doc.imdb.rating); //不返回8.4,只是崩溃的节点

res.send(result.rows[0].doc.title); //返回大卫和歌利亚

res.send(result.rows[0].doc.cast[0]); //返回Miles Sloman

我哪里错了?

根据Express res.send([body])文档:

body参数可以是一个Buffer对象,一个String,一个对象或者一个Array

你不能自己发送号码。

尝试将数字转换为string

 res.send(''+result.rows[0].doc.imdb.rating); 

或者将其作为对象值发送

 res.send({ result: result.rows[0].doc.imdb.rating});