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Editorial Team
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Asked: 2026-06-11T10:08:21+00:00

I’m trying to execute the following query: query = Comment.query(ancestor = userKey, ndb.OR(Comment.modifiedDate >

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I’m trying to execute the following query:

query = Comment.query(ancestor = userKey, ndb.OR(Comment.modifiedDate > lastSyncDate, Comment.activityDate > lastSyncDate))

The 1 equal sign (=) is how the docs said we should have it, but my app doesn’t run when I have just 1 equal sign (build error). If I use two equal sign, like ancestor == userKey, then the app runs, but I get a NameError: global name 'ancestor' is not defined. What gives?

I also tried another variant of this query, but the same exact problem occurs:

query = Comment.query(ndb.AND(ancestor == userKey, ndb.OR(Comment.modifiedDate > lastSyncDate, Comment.activityDate > lastSyncDate)))
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1 Answer

  1. Editorial Team

    You need to put the ancestor keyword after the method positional parameters:

    query = Comment.query(
    ndb.OR(Comment.modifiedDate > lastSyncDate, Comment.activityDate > lastSyncDate),
    ancestor=userKey)

    Alternatively, use the filters keyword explicitly, or use the .filter() method:

    query = Comment.query(
    ancestor=userKey,
    filters=ndb.OR(Comment.modifiedDate > lastSyncDate, Comment.activityDate > lastSyncDate))

    or

    query = Comment.query(ancestor=userKey).filter(ndb.OR(Comment.modifiedDate > lastSyncDate, Comment.activityDate > lastSyncDate))
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