Node.JS数据存储查询获取密钥 [英] Node.JS Datastore Query get Key

问题描述

如何获取查询返回的实体的键？

我试图像普通数据那样访问它，但是当我在那里打印实体时没有关键。有没有办法做到这一点？

预先感谢您的帮助。 解决方案

$ b

 
  var datastore = require（'@ google-cloud / datastore'）（）; 
 var query = datastore.createQuery（'AnimalNamespace'，'Lion'）; 
 query.run（function（err，entities）{
 
 var keys = entities.map（function（entity）{
 // datastore.KEY是一个Symbol 
返回实体[datastore.KEY]; 
}）; 
}）; 
  

您也可以使用gstore-node库（ https://github.com/sebelga/gstore-node ），然后你可以通过entity.entityKey直接访问它。

How can I get the key of an entity returned by a query?

I tried to access it like the normal data, but when I print the entity itself there is no key. Is there even a way to do so?

Thank you in advance for your help.

解决方案

Since version 0.5.0 of the @google-cloud/datastore v0.5.0 the key is now accesible by a Symbol.

var datastore = require('@google-cloud/datastore')();
var query = datastore.createQuery('AnimalNamespace', 'Lion');
query.run(function(err, entities) {

var keys = entities.map(function(entity) {
        // datastore.KEY is a Symbol
        return entity[datastore.KEY];
    });
});

You could also use the gstore-node library (https://github.com/sebelga/gstore-node) and then you would access it directly by entity.entityKey

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