public static async Task UpdateAsync <T>(this DbContext context, IQueryable <T> query, PropertyWatcher <T> Saved)
where T : class, new()
{
//var itemParam = Expression.Parameter(typeof(T), "x");
//var primaryKeys = Utilities.GetPrimaryKeys(typeof(T), context);
//var primaryKeyArgs = primaryKeys.Select(c => Expression.PropertyOrField(itemParam, c.Name)).ToArray();
//var selector = Expression.Call(typeof(Tuple), "Create", primaryKeyArgs.Select(c => c.Type).ToArray(), primaryKeyArgs);
//var lambda = Expression.Lambda<Func<T, object>>(selector, itemParam);
//foreach (var item in query.Select(lambda.Compile()))
//{
// T ret = new T();
// foreach (var v in primaryKeys.Select((c, index) => new { c, index }))
// {
// var tupleProp = item.GetType().GetProperty("Item" + v.index).GetValue(item);
// v.c.SetValue(ret, tupleProp);
// }
// var updated = context.Entry(ret);
// Saved.LoadToInstance(ref ret);
// foreach (var v in Saved.GetValues())
// {
// updated.Property(v.Key.Name).IsModified = true;
// }
//}
await query.ForEachAsync(item =>
{
var ret = item;
var updated = context.Entry(ret);
Saved.LoadToInstance(ref ret);
foreach (var v in Saved.GetValues())
{
updated.Property(v.Key.Name).IsModified = true;
}
});
context.Configuration.ValidateOnSaveEnabled = false;
}
public static void Update <T, T2>(this DbContext context, PropertyWatcher <T> Saved, Expression <Func <T, T2> > KeyField, T2 KeyValue)
where T : class, new()
{
var ret = new T();
Saved.LoadToInstance(ref ret);
var prop = Reflection.GetPropertyInfo(KeyField);
prop.SetValue(ret, KeyValue);
context.Set <T>().Attach(ret);
var updated = context.Entry <T>(ret);
foreach (var v in Saved.GetValues())
{
updated.Property(v.Key.Name).IsModified = true;
}
context.Configuration.ValidateOnSaveEnabled = false;
}
