Big thank yous to everyone who answered my previous questions. I'm
actually getting some code written, which feels good...
Is there an easier way to get a unique object than getting a list, and
getting the first item in it?
In particular, I followed Todd Blanchard's advice to set up an enum as
a table/class with an auto-generated PK and a value field.
In particular, this is my Role object, and now to get a Role I have to
do something like:
DataContext dc; // is correctly set
Role role = (Role) dc.performQuery(
new SelectQuery(Role.class,
ExpressionFactory.matchExp("value", "admin"))).get(0);
Should I create a static getRole(String value) method in the Role
object? If so, should I pass in the DataContext, since I'm creating one
per Tapestry Visit object (aka HttpSession, kinda) and don't want the
overhead of making a bunch?
Is there a shortcut for fetching objects based on what should be a
unique key (like "admin" in this case, or a user's login)? That would
be really nice. Something like
dc.fetch(Role.class, "value", "admin") which returned the object would
be cool.
It could also throw an exception if the object wasn't unique.
Or maybe someone's suggested something similar before and there are
good reasons not to do it. Or maybe I'm missing something.
Thanks,
Todd
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