node.js Meteor - collection.find() 总是返回所有字段
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Meteor - collection.find() always returns all fields
提问by redcap3000
Ran into this (slightly annoying problem) I'm trying to look up all records in a collection and not show (or show) a specific field (score). This is just an example and not reflective of my actual code, but the problem is always reproducible. The fields I am excluding are very large and I'm merely trying to generate a menu of available records.
遇到这个（有点烦人的问题）我正在尝试查找集合中的所有记录，而不显示（或显示）特定字段（分数）。这只是一个示例，并不反映我的实际代码，但问题始终是可重现的。我排除的字段非常大，我只是想生成一个可用记录的菜单。
Commands like
命令像
players.find({},{score:1})
players.find({},{score:0})
Always return every field, instead of triggering the exclude/include in mongodb. Am I worried about nothing, since the template potentially can control what data gets rendered to html? Still feels like the data is transferred to the client side regardless; and shows up in the console.
始终返回每个字段，而不是在 mongodb 中触发 exclude/include。我什么都不担心，因为模板可能可以控制将哪些数据呈现为 html？仍然感觉数据传输到客户端无论如何; 并显示在控制台中。
回答by nate-strauser
your syntax is off a bit, it should be
你的语法有点不对，应该是
CollectionName.find({}, {fields: {'onlyThisField':1}});
or
或者
CollectionName.find({}, {fields: {'everythingButThisField':0}});
your template does indeed control what data is displayed, but there are still many scenarios where field limiting makes sense - privacy of data or efficiency (some fields of all records, all fields of the 'current' record) are two common ones
您的模板确实控制显示哪些数据，但仍有许多场景限制字段有意义 - 数据隐私或效率（所有记录的某些字段，“当前”记录的所有字段）是两个常见的
you didnt mention it, but this usually is within a publish function - see http://docs.meteor.com/#meteor_publish- the fieldsmodifier is also available on the client, but there it does not limit data sent down to client, just to the template - server side field reduction/selection has different benefits
你没有提到它，但这通常是在发布功能中 - 见http://docs.meteor.com/#meteor_publish-fields修改器也可在客户端上使用，但它不限制发送到客户端的数据，只是到模板 - 服务器端字段减少/选择有不同的好处
--
——
double check that you've removed the autopublishpackage too, however you should see a warning if you have that active and write your own publish functions, which is where you would most commonly use fields
仔细检查您是否也删除了该autopublish软件包，但是如果您有该软件包并编写自己的发布函数，您应该会看到警告，这是您最常使用的地方fields
回答by L.T
First, if you want to control some fields in Collection.find()，you can try to do it this way:
首先，如果你想控制 中的某些字段Collection.find()，你可以尝试这样做：
CollectionName.find({}, {fields: {field:1}});
but it was working only on the server.
但它只在服务器上工作。
Or try this:
或者试试这个：
On the server:
在服务器上：
Meteor.publish("myCollection", function () {
return SvseTree.find({},{fields: {field:1}});
});
On the client:
在客户端：
Meteor.subscribe("myCollection");
then run meteor remove autopublish.
然后运行meteor remove autopublish。
Second, if you want to get Array of Collection.find(), try to do it: Collection.find().fetch();
其次，如果你想得到Collection.find()的Array，尝试这样做：Collection.find().fetch();
