如何访问和更改集合中的特定属性?

问题描述：

我有一个名为产品"的收藏集.我想访问并更改集合中一个名为"screenShots"的属性.

I have a collection called "Products". I want to access and change an attribute called "screenShots" inside the collection.

此代码不适用于我

screenshotsURLS: function(sshots) {
    check(sshots, [String]);
    Products.update({},{$set:{screenShots:sshots}});
    console.log(sshots);
}

当我用console.log记录时，我可以看到该数组存在，但是更新功能不起作用

when i console.log the sshots, i can see that the array exists, but the update function isn't working

如何将产品"集合中的screenShots属性设置为"screenshotsURLS"函数中传递的任何值?

how do i set the screenShots attribute inside the Product collection to whatever value passed in "screenshotsURLS" function?

答

为此，您必须更新mongodb文档.

For that you have to update the mongodb document.

这是在流星中更新文档的方式.

THis is how you can update the doc in meteor.

collectionName.update(
   <query>,
   <update>,
   {
     upsert: <boolean>,
     multi: <boolean>,
     writeConcern: <document>
   }
)

在您的情况下，collectionName是Products，字段是screenShots. 因此，这样做.您的查询将是冲刺

In your your case collectionName is Products and field is screenShots. So for doing this. Your query will be sshots

Products.update({},{$set:{screenShots:sshots}}) (Be careful this will update all of your doc)

要选择文档更新，请使用类似的查询.

For selecting doc update use the query like.

Products.update({name:'yourProductName'},{$set:{screenShots:sshots}})

有关更新的更多信息，请检查此链接

For more about update a please check this link.