title: Query entities by specifying a list of values in GAE Datastore
body: <p>In my Datastore, I would like to query some entities by specifying as Filter the values of the same property.
  For instance I have the Entity named Foo defined as follows:</p>
  
  <p><code>type Foo struct {
    Id        int64
    Name      string
    CreatorId int64
  }
  </code></p>
  
  <p>And I want to retrieve all the Foo entities which have 1, 5, 23 as CreatorId. So I define the following query:</p>
  
  <p><code>q := datastore.NewQuery("Foo").Filter("CreatorId =", 1).Filter("CreatorId =", 5).Filter("CreatorId =", 23)</code></p>
  
  <p>But zero entity has been fetched. I looked into the documentation (<a href="https://developers.google.com/appengine/docs/go/datastore/reference" rel="nofollow">https://developers.google.com/appengine/docs/go/datastore/reference</a>) but it is not explained how to achieve this kind of query.</p>
  
  <p>Some help will be greatly appreciated.</p>