Model-binding an object from the repository by several keys
- by Anton
Suppose the following route:
{region}/{storehouse}/{controller}/{action}
These two parameters region and storehouse altogether identify a single entity - a Storehouse. Thus, a bunch of controllers are being called in the context of some storehouse.
And I'd like to write actions like this:
public ActionResult SomeAction(Storehouse storehouse, ...)
Here I can read your thoughts: "Write custom model binder, man". I do. However, the question is
How to avoid magic strings within custom model binder?
Here is my current code:
public class StorehouseModelBinder : IModelBinder
{
readonly IStorehouseRepository repository;
public StorehouseModelBinder(IStorehouseRepository repository)
{
this.repository = repository;
}
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var region = bindingContext.ValueProvider.GetValue("region").AttemptedValue;
var storehouse = bindingContext.ValueProvider.GetValue("storehouse").AttemptedValue;
return repository.GetByKey(region, storehouse);
}
}
If there was a single key, bindingContext.ModelName could be used...
Probably, there is another way to supply all the actions with a Storehouse object, i.e. declaring it as a property of the controller and populating it in the Controller.Initialize.
