擅长:python、mysql、java
<p>传递给<code>Key.from_path()</code>的参数包含构建唯一键所需的所有信息,因此不需要它命中数据存储。在</p>
<blockquote>
<p>Each entity in the Datastore has a key that uniquely identifies it.
The key consists of the following components:</p>
<ol>
<li>The kind of the entity, which categorizes it for the purpose of Datastore queries</li>
<li>An identifier for the individual entity, which can be either
<ul>
<li>a key name string</li>
<li>an integer numeric ID</li>
</ul></li>
<li>An optional ancestor path locating the entity within the Datastore hierarchy</li>
</ol>
</blockquote>
<p>来源:<a href="https://developers.google.com/appengine/docs/python/datastore/entities" rel="nofollow">https://developers.google.com/appengine/docs/python/datastore/entities</a></p>