Support for (compile-time) typesafe queries

[GoogleCodeExporter]

It would be nice if we could query type safe.

For example, in  http://code.google.com/p/morphia/wiki/Query it would be nice 
if we could make sure that the field foo actually exists in `MyEntity.class` 
and that operations expressed in the query are compatible with this type. This 
will probably involve some code generetion to generate a class like 
`MyEntityField` that has a field FOO and legitimate operations.

Some one can write:
{{{
ds.createQuery(MyEntity.class).filter(MyEntityField.FOO.lessThan(12)).offset(100
0);
}}}
instead of:
{{{
ds.createQuery(MyEntity.class).filter("foo >", 12).offset(1000);
}}}

Any thoughts on this?

Original issue reported on code.google.com by wouter...@gmail.com on 28 Mar 2012 at 8:30

[GoogleCodeExporter]

You can use QueryDSL to do this already. I don't see this being done in morphia 
when there are already projects which do this which integrate. 
http://blog.mysema.com/search/label/morphia

Morphia already checks for the fields and types at runtime when you use the 
second form.

Original comment by scotthernandez on 28 Mar 2012 at 12:37

• Changed title: Support for (compile-time) typesafe queries
• Changed state: WontFix
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

I was unaware that QueryDSL was morphia compatible for mongoDB. Thanks!

Original comment by wouter...@gmail.com on 28 Mar 2012 at 12:50