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这只是一个简单的检查,如果集合不存在,那么创建它并预填充数据。这在我的本地框上工作正常,并且取决于在db.collection调用中设置的“strict”标志,如果该coll不存在,将会引发错误。它在Heroku上不起作用,但是,任何人都知道为什么?使用db.collection和严格标志在Heroku中不起作用
mongo.Db.connect(mongoUri, function (err, db) {
if (!err)
{
console.log("Connected to Database")
db.collection('collectionName', {strict:true}, function(er, collection) {
if (!er)
{
console.log("Collection opened, ready for use!")
} else {
console.log("DATA DOES NOT EXIST, PREPOPULATING")
populateDB();
}
});
} else {
console.log("Error connecting to database: " + err)
}
});
的package.json
{
"name": "appname",
"description": "Application",
"version": "0.0.1",
"private": true,
"dependencies": {
"express": "3.x",
"mongodb": "1.3.x",
"socket.io": "0.9.10"
},
"engines": {
"node": "0.8.4",
"npm": "1.1.49"
}
}