StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POHow can I query for records based on an attribute of a ReferenceProperty? (Django on App Engine)
primarykey
Id
3939830
data
AcceptedAnswerId
3939992
AnswerCount
1
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2010-10-15T05:59:07.563
FavoriteCount
0
LastActivityDate
2010-10-15T06:34:47.800
LastEditDate
LastEditorUserId
0
OwnerUserId
433226
ParentId
0
PostTypeId
1
Score
1
ViewCount
77
LastEditorDisplayName
text
Body
If I have the following models in a Python (+ Django) App Engine app: <pre><code>class Album(db.Model): private = db.BooleanProperty() ... class Photo(db.Model): album = db.ReferenceProperty(Album) title = db.StringProperty() </code></pre> ...how can I retrieve all Photos that belong to a public Album (that is, an Album with private == False)? To further explain my intention, I thought it would be: <pre><code>public_photos = Photos.all().filter('album.private = ', False) </code></pre> and then I could do something like: <pre><code>photos_for_homepage = public_photos.fetch(30) </code></pre> but the query does not match anything, which tells me I'm going down the wrong path.
Tags
<python><django><google-app-engine><google-cloud-datastore>
Title
How can I query for records based on an attribute of a ReferenceProperty? (Django on App Engine)
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USductionist
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 POHow can I query for records based on an attribute of a ReferenceProperty? (Django on App Engine)
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.