快速创建新的流星集合 [英] Creating new Meteor collections on the fly
问题描述
是否可以即时创建新的Meteor集合?我想根据某些路径名创建foo_bar
或bar_bar
,这应该是我认为的全局变量(以便可以在整个应用程序中访问它).
像这样:
Is it possible to create new Meteor collections on-the-fly? I'd like to create foo_bar
or bar_bar
depending on some pathname which should be a global variable I suppose (so I can access it throughout my whole application).
Something like:
var prefix = window.location.pathname.replace(/^\/([^\/]*).*$/, '$1');
var Bar = new Meteor.Collection(prefix+'_bar');
这里的事情是我应该从URL获取我的prefix
变量,因此,如果我在if (Meteor.isClient)
之外声明它,则会出现错误:ReferenceError: window is not defined
.完全有可能做类似的事情吗?
The thing here is that I should get my prefix
variable from URL, so if i declare it outside of if (Meteor.isClient)
I get an error: ReferenceError: window is not defined
. Is it possible to do something like that at all?
编辑:使用Akshats的第一版回答我的项目js: http://pastie. org/6411287
Edit : Using the first iteration of Akshats answer my project js : http://pastie.org/6411287
推荐答案
我不确定这是否行得通:
I'm not entirely certain this will work:
您需要两部分,第一部分是加载您之前设置的集合(在客户端和服务器上)
You need it in two pieces, the first to load collections you've set up before (on both the client and server)
var collections = {};
var mysettings = new Meteor.Collection('settings') //use your settings
//Startup
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
collections[doc.name] = new Meteor.Collection(doc.name);
})'
您需要一点时间在服务器上添加集合:
And you need a bit to add the collections on the server:
Meteor.methods({
'create_server_col' : function(collectionname) {
mysettings.insert({type:'collection', name: collectionname});
newcollections[collectionname] = new Collection(collectionname);
return true;
}
});
您需要在客户端上创建它们:
And you need to create them on the client:
//Create the collection:
Meteor.call('create_server_col', 'My New Collection Name', function(err,result) {
if(result) {
alert("Collection made");
}
else
{
console.log(err);
}
}
再次,这都是未经测试的,所以我只是给它试一下,希望它能起作用.
Again, this is all untested so I'm just giving it a shot hopefully it works.
编辑
也许下面的方法应该起作用,我添加了一些检查以查看该集合是否首先存在.请先运行meteor reset
,然后再使用它对以上代码中的错误进行排序:
Perhaps the below should work, I've added a couple of checks to see if the collection exists first. Please could you run meteor reset
before you use it to sort bugs from the code above:
var collections = {};
var mysettings = new Meteor.Collection('settings')
if (Meteor.isClient) {
Meteor.startup(function() {
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
eval("var "+doc.name+" = new Meteor.Collection("+doc.name+"));
});
});
Template.hello.greeting = function () {
return "Welcome to testColl.";
};
var collectionname=prompt("Enter a collection name to create:","collection name")
create_collection(collectionname);
function create_collection(name) {
Meteor.call('create_server_col', 'tempcoll', function(err,result) {
if(!err) {
if(result) {
//make sure name is safe
eval("var "+name+" = new Meteor.Collection('"+name+"'));
alert("Collection made");
console.log(result);
console.log(collections);
} else {
alert("This collection already exists");
}
}
else
{
alert("Error see console");
console.log(err);
}
});
}
}
if (Meteor.isServer) {
Meteor.startup(function () {
// code to run on server at startup
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
collections[doc.name] = new Meteor.Collection(doc.name);
});
});
Meteor.methods({
'create_server_col' : function(collectionname) {
if(!mysettings.findOne({type:'collection', name: collectionname})) {
mysettings.insert({type:'collection', name: collectionname});
collections[collectionname] = new Meteor.Collection(collectionname);
return true;
}
else
{
return false; //Collection already exists
}
}
});
}
还请确保您的名字用JavaScript进行了转义.
Also make sure your names are javascript escaped.
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