擅长:python、mysql、java
<p>根据<a href="http://www.rubydoc.info/gems/google-api-client/Google/Apis/DriveV2/File#head_revision_id-instance_method" rel="nofollow noreferrer">this page</a>这就是它目前的工作方式。在</p>
<pre><code>#head_revision_id ⇒ String
The ID of the file's head revision. This field is only populated for files with content stored in Drive; it is not populated for Google Docs or shortcut files.
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