How to override the CRUD/list() function? Play! framework - pagination

Question

I'm trying to override the list() function of the CRUD module for one of my models.
I found this on google groups which is essentially the issue i'm having.
Basically I want to filter the list based on certian categories, I tried this:
CONTROLLER
public static void list(string category){
List<Duty> object = Duty.getByCategory(category);
render(object);
}
MODEL
public static List<Duty> getByCategory(String category){
List<Duty> result = Duty.find("select distinct d from Duty d join " +
"d.category c where c.name = ? order by d.name", category).fetch();
return result;
}
I get the following error:
How do you overwrite the list action?
Any help will be much appreciated.

Answer 1

It seems that you are overriding the controller but not the template. The signature of the CRUD list method is this one, slightly different that yours:
public static void list(int page, String search, String searchFields, String orderBy, String order) {
ObjectType type = ObjectType.get(getControllerClass());
notFoundIfNull(type);
if (page < 1) {
page = 1;
}
List<Model> objects = type.findPage(page, search, searchFields, orderBy, order, (String) request.args.get("where"));
Long count = type.count(search, searchFields, (String) request.args.get("where"));
Long totalCount = type.count(null, null, (String) request.args.get("where"));
try {
render(type, objects, count, totalCount, page, orderBy, order);
} catch (TemplateNotFoundException e) {
render("CRUD/list.html", type, objects, count, totalCount, page, orderBy, order);
}
}
You will notice that render() is passing many more parameters that you do, and probably they are not optional. Try to provide values for them.

Answer 2

You can override the CRUD list method, and add filters passing many parameters in where for example:
public static void list(int page, String search, String searchFields, String orderBy, String order) {
ObjectType type = ObjectType.get(getControllerClass());
notFoundIfNull(type);
if (page < 1) {
page = 1;
}
String where = "nameAttribute =" + value;
List<Model> objects = type.findPage(page, search, searchFields, orderBy, order, where);
Long count = type.count(search, searchFields, where);
Long totalCount = type.count(null, null, where);
try {
render(type, objects, count, totalCount, page, orderBy, order);
} catch (TemplateNotFoundException e) {
render("CRUD/list.html", type, objects, count, totalCount, page, orderBy, order);
}
}

Answer 3

Try to call that override method from view(xtml).
<form action="#{Controler.overrideList()}" method="POST">
And use previous code,and add filters passing many parameters in where = "..."