Google AppEngine Blobstore: Downloading a Blob by Filename in Java?

BlobInfo metadata that contains the filename attribute is stored in read-only BlobInfo entities in the datastore Query query = new Query("__BlobInfo__"); query. AddFilter("filename", FilterOperator. EQUAL, filename); DatastoreService datastore = DatastoreServiceFactory.

GetDatastoreService(); PreparedQuery pq = datastore. Prepare(query); List entList = pq. AsList(FetchOptions.Builder.

WithLimit(1)).

BlobInfo metadata that contains the filename attribute is stored in read-only __BlobInfo__ entities in the datastore. Query query = new Query("__BlobInfo__"); query. AddFilter("filename", FilterOperator.

EQUAL, filename); DatastoreService datastore = DatastoreServiceFactory. GetDatastoreService(); PreparedQuery pq = datastore. Prepare(query); List entList = pq.

AsList(FetchOptions.Builder. WithLimit(1)).

Which is basically what I said. – jtahlborn Apr 2 at 10:57 @jtahlborn Specifics - and even better, sample code - count for a lot. – Nick Johnson Apr 4 at 1:01 @Nick Johnson - my answer was sufficient for anyone who knows anything about app engine to solve their problem.

If the user actually required this full answer, then their question should have been "how do I query a model object in app engine". 2 different questions. – jtahlborn Apr 4 at 15:57 1 @jtahlborn I, and at least two others, would appear to disagree.

– Nick Johnson Apr 4 at 23:30 1 @jtahlborn So what you're saying is that you knew the complete answer, you were just too lazy to provide it? You shouldn't be surprised your answer isn't being upvoted. – Nick Johnson Apr 21 at 4:00.

You can query the BlobInfo objects by filename.

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