public List<Item> getItemsByTag(Tag tag) {
PersistenceManager persistenceManager = getPersistenceManager(); //
my way to get PersistanceManager
persistenceManager.setDetachAllOnCommit(true);
Query query = persistenceManager.newQuery(Item.class);
query.setFilter("this.tags.contains(tagKeyParam)");
query.declareImports("import
com.google.appengine.api.datastore.Key;");
query.declareParameters("Key tagKeyParam");
List<Item> items = new ArrayList<Item>();
try {
items = (List<Item>) query.execute(tag.getKey());
items.size();
}
finally {
query.closeAll();
persistenceManager.close();
}
return items;
}
On Aug 22, 9:44 am, Raghu <[email protected]> wrote:
> Hi All,
>
> I just want to reopen the existing challenge. I'm trying hard to think
> query on 2 tables with m-m relation.
>
> Tags{
> List <Key> items;}
>
> Item{
> List <Key> tags;
>
> }
>
> Please suggest me how to find all the items with given tag. is there
> any trick here.
>
> thanks
>
> raghu
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