創(chuàng)建集合

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

添加數(shù)據(jù)

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

var myData = {
   key1: "value 1...",
   key2: "value 2...",
   key3: "value 3...",
   key4: "value 4...",
   key5: "value 5..."
}

MyCollection.insert(myData);

查找數(shù)據(jù)

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

var myData = {
   key1: "value 1...",
   key2: "value 2...",
   key3: "value 3...",
   key4: "value 4...",
   key5: "value 5..."
}

MyCollection.insert(myData);

var findCollection = MyCollection.find().fetch();
console.log(findCollection);

控制臺將在插入之前顯示數(shù)據(jù)。

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

var myData = {
   key1: "value 1...",
   key2: "value 2...",
   key3: "value 3...",
   key4: "value 4...",
   key5: "value 5..."
}

MyCollection.insert(myData);

var findCollection = MyCollection.find({key1: "value 1..."}).fetch();
console.log(findCollection);

更新數(shù)據(jù)

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

var myData = {
   key1: "value 1...",
   key2: "value 2...",
   key3: "value 3...",
   key4: "value 4...",
   key5: "value 5..."
}

MyCollection.insert(myData);

var findCollection = MyCollection.find().fetch();
var myId = findCollection[0]._id;

var updatedData = {
   key1: "updated value 1...",
   key2: "updated value 2...",
   key3: "updated value 3...",
   key4: "updated value 4...",
   key5: "updated value 5..."
}

MyCollection.update(myId, updatedData);

var findUpdatedCollection = MyCollection.find().fetch();
console.log(findUpdatedCollection);

控制臺將顯示被我們更新的集合。

刪除數(shù)據(jù)

要從集合中刪除數(shù)據(jù)可以通過remove()方法來完成。我們在這個例子設(shè)置ID作為參數(shù)來刪除特定數(shù)據(jù)。

meteorApp/client/main.js

MyCollection = new Mongo.Collection('myCollection');

var myData = {
   key1: "value 1...",
   key2: "value 2...",
   key3: "value 3...",
   key4: "value 4...",
   key5: "value 5..."
}

MyCollection.insert(myData);

var findCollection = MyCollection.find().fetch();
var myId = findCollection[0]._id;

MyCollection.remove(myId);

var findDeletedCollection = MyCollection.find().fetch();
console.log(findDeletedCollection);

如果我們想從集合刪除一切，可以用同樣的方法，但不是ID，這里使用空對象{}. 出于服務(wù)器安全原因我們需要做這個。

meteorApp/client/main.js

if (Meteor.isServer) {

   MyCollection = new Mongo.Collection('myCollection');

   var myData = {
      key1: "value 1...",
      key2: "value 2...",
      key3: "value 3...",
      key4: "value 4...",
      key5: "value 5..."
   }

   MyCollection.insert(myData);
   MyCollection.remove({});
	
   var findDeletedCollection = MyCollection.find().fetch();
   console.log(findDeletedCollection);
} 

我們還可以通過使用其它的參數(shù)來刪除數(shù)據(jù)。 如在前面的例子中，Meteor將強制我們在服務(wù)器上這樣做。

meteorApp/client/main.js

if (Meteor.isServer) {

   MyCollection = new Mongo.Collection('myCollection');

   var myData = {
      key1: "value 1...",
      key2: "value 2...",
      key3: "value 3...",
      key4: "value 4...",
      key5: "value 5..."
   }

   MyCollection.insert(myData);
   MyCollection.remove({key1: "value 1..."});
	
   var findDeletedCollection = MyCollection.find().fetch();
   console.log(findDeletedCollection);
}

你可以看到，在命令窗口中刪除的數(shù)據(jù)。