Of course you can do it.
there is a keyword "member of" in JP-QL. you can use the JP-QL below
to do what you want.
Query query = new Query("select o from user o where :tag member of
o.tags");
query.setParameter("tag","abc")
On 7月25日, 下午8时28分, salvatore <[email protected]> wrote:
> Hi i've problem
> How a can query a data inside an ArrayList?
> I use low level Datastore API
> the data is structured like this
> entity (kind 'User')
> -String username
> -String pass
> -ArrayList<String> tags
> I want to query all the user with a specific role
> my code
> //...
> DatastoreService ds=
> DatastoreServiceFactory.getDatastoreService();
> Query query = new Query("User");
> query.addFilter("tag????", Query.FilterOperator.EQUAL,
> "admin"); // <<<<<-----HERE
> PreparedQuery pq = ds.prepare(query);
> Iterable<Entity> it = pq.asIterable();
> //...
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