好吧，我有一个php来响应GET HTTP请求；这个php脚本调用数据库，并检索一组行。
$results = $db->pdoquery("SELECT * FROM posts JOIN users ON posts.user_id=users.id ORDER BY posts.cre DESC LIMIT 4");
$json = json_encode($results);
echo $json;
现在，当我使用backbonejs".fetch"命令时，它只返回第一条记录1，而不是四条。
如果我更改php脚本，我会得到所有四个，但我必须失去我的JOIN
$results = $db->pdoquery("SELECT * FROM posts ORDER BY posts.cre DESC LIMIT 4");
$json = json_encode($results);
echo $json;
有人能解释我做错了什么吗？
更新：php页面打印的JSON
[{"id":"7","post_name":"title","pretty_url":"link1","preface":"a preface 7","body_text":"a body","feat":"0","img":"'/img'/logo.png","cre":"2012-07-22","modi":"2012-07-18","user_id":"2"},{"id":"6","post_name":"title","pretty_url":"link","preface":"a preface 6","body_text":"a body1","feat":"0","img":"'/img'/logo.png","cre":"2012-07-21","modi":"2012-07-18","user_id":"2"},{"id":"5","post_name":"TestTitle 1","pretty_url":"testlink4","preface":"a preface 5","body_text":"a body 2","feat":"0","img":"'/img'/logo.png","cre":"2012-07-20","modi":"2012-07-16","user_id":"2"},{"id":"4","post_name":"TestTitle 1","pretty_url":"testlink3","preface":"a preface 4","body_text":"a body 3","feat":"0","img":"'/img'/logo.png","cre":"2012-07-19","modi":"2012-07-16","user_id":"2"}]
我发现了问题。
Posts和Users具有相同名称的列，主要是"id"，由于这四个post记录具有相同的user_id，因此"id"列被设置为相同的值。
Backbone必须内置一些东西，跳过它认为相同的记录或类似的东西。简单地描述我需要的更详细的内容就解决了这个问题。
不管修复的代码是什么，它都低于
$results = $db->pdoquery("SELECT
posts.post_name, posts.pretty_url, posts.preface, posts.img, posts.cre, posts.modi, users.username
FROM posts
JOIN users
ON posts.user_id=users.id
ORDER BY posts.cre
DESC LIMIT 4");
$json = json_encode($results);
echo $json;
感谢所有帮助过我的人。