protected ActionResult DeleteInstanceOf(Type modelType, object key, Func <ActionResult> onSuccess, Func <Exception, ActionResult> onException, Func <ActionResult> onNotFound)
{
using (var context = ModelAssemblies.GetContext(modelType))
{
try
{
var set = context.Set(modelType);
var descriptor = new ModelDescriptor(ModelMappingManager.FindByType(modelType));
var instance = set.Find(Convert.ChangeType(key, descriptor.KeyProperty.PropertyType));
if (instance == null)
{
return(onNotFound());
}
set.Remove(instance);
context.SaveChanges();
}
catch (Exception ex)
{
HandleException(ex);
return(onException(ex));
}
return(onSuccess());
}
}
protected ActionResult EditInstanceOf(Type modelType, Model model, Func <object, ActionResult> onSuccess, Func <Exception, ActionResult> onException, Func <ActionResult> onNotFound)
{
using (var context = ModelAssemblies.GetContext(modelType))
{
try
{
if (model.Instance == null)
{
return(onNotFound());
}
var set = context.Set(modelType);
var attached = set.Attach(model.Instance);
if (attached == null)
{
return(onNotFound());
}
context.Entry(attached).State = EntityState.Modified;
context.SaveChanges();
return(onSuccess(attached));
}
catch (Exception ex)
{
HandleException(ex);
return(onException(ex));
}
}
}
protected static object GetInstanceOf(Type modelType, object key, ModelDescriptor descriptor)
{
var context = ModelAssemblies.GetContext(modelType);
var set = context.Set(modelType);
var instance = set.Find(Convert.ChangeType(key, descriptor.KeyProperty.PropertyType));
return(instance);
}
protected Query.Query GetDefaultQueryOf(Type modelType)
{
var context = ModelAssemblies.GetContext(modelType);
var source = context.Set(modelType);
var query = QueryParser.Parse(modelType, source);
return(query);
}
protected Query.Query GetQueryById(Type modelType)
{
var context = ModelAssemblies.GetContext(modelType);
var source = context.Set(modelType);
var query = QueryParser.Parse(modelType, source, Request["q"]);
return(query);
}
protected ActionResult ExecuteMethodOf(Type modelType, Method model, Func <ActionResult> onSuccess, Func <object, ActionResult> onSuccessWithReturn, Func <Exception, ActionResult> onException, Func <ActionResult> onNotFound, string key = null)
{
using (var context = ModelAssemblies.GetContext(modelType))
{
try
{
object @return;
if (!model.Descriptor.Method.IsStatic)
{
var descriptor = new ModelDescriptor(ModelMappingManager.FindByType(modelType));
var set = context.Set(modelType);
var instance = set.Find(Convert.ChangeType(key, descriptor.KeyProperty.PropertyType));
if (instance == null)
{
return(onNotFound());
}
@return = model.Invoke(instance);
context.SaveChanges();
if (@return == instance)
{
@return = null;
}
}
else
{
@return = model.Invoke(null);
}
if (@return != null)
{
return(onSuccessWithReturn(@return));
}
}
catch (Exception ex)
{
HandleException(ex);
return(onException(ex));
}
return(onSuccess());
}
}
protected ActionResult CreateInstanceOf(Type modelType, Method method, Func <object, ActionResult> onSuccess, Func <Exception, ActionResult> onException)
{
using (var context = ModelAssemblies.GetContext(modelType))
{
try
{
var instance = method.Invoke(null);
var set = context.Set(modelType);
set.Add(instance);
context.SaveChanges();
return(onSuccess(instance));
}
catch (Exception ex)
{
HandleException(ex);
return(onException(ex));
}
}
}
