google-cloud-datastore

I created a new property for my db model in the Google App Engine Datastore. Old: class Logo(db.Model): name = db.StringProperty() image = db.BlobProperty() New: class Logo(db.Model): name = db.StringProperty() image = db.BlobProperty() is_approved = db.BooleanProperty(default=False) How to query for the Logo records, which to not have the 'is_approved' value set? I tried logos.filter("is_approved = ", None) but it didn't work. In the Data Viewer the new field values are displayed as . According to the App Engine documentation on Queries and Indexes , there is a distinction between entities

I need to get a count of records for a particular model on App Engine. How does one do it? I bulk uploaded more than 4000 records but modelname.count() only shows me 1000. You should use Datastore Statistics : Query query = new Query("__Stat_Kind__"); query.addFilter("kind_name", FilterOperator.EQUAL, kind); Entity entityStat = datastore.prepare(query).asSingleEntity(); Long totalEntities = (Long) entityStat.getProperty("count"); Please note that the above does not work on the development Datastore but it works in production (when published). I see that this is an old post, but I'm adding an

Can someone illustrate how I can store and easily query hierarchical data in google app engine datastore? The best option depends on your requirements. Here's a few solutions (I'm assuming you're using Python, since you didn't specify): If you need to do transactional updates on an entire tree, and you're not going to have more than about 1QPS of sustained updates to any one tree, you can use the built in support for heirarchial storage. When creating an entity, you can pass the "parent" attribute to specify a parent entity or key, and when querying, you can use the .ancestor() method (or

I created a page to delete all entries from datastore. I am using self.key.delete() for this but it has stopped working (it worked once but it isn't working anymore). My python code to delete entries: class DeletePage(Handler): def get(self): self.key.delete() self.render('deletepage.html') Assuming that: you're using the ndb library you have a models.py file with the entity models Then you can try something like this, hooked up in one of the app's handler: from google.appengine.ext import ndb import inspect import models for kind, model in inspect.getmembers(models): if not isinstance(model,