/// <summary>
/// Sets all properties from a dictionary to the corresponding property
/// name on the update object (assumes that types are the same between objects)
/// </summary>
/// <param name="dict">The dictionary containing the new values</param>
/// <param name="updateObj">The object being updated</param>
/// <param name="ctx">The db context</param>
public static void Map <T>(IDictionary <string, object> dict, T updateObj, IPrimaryContext ctx) where T : class, IEntity
{
foreach (var propName in dict.Keys)
{
EntityHelper.SetPropValue(updateObj, propName, dict[propName]);
ctx.Entry(updateObj).Property(propName).IsModified = true;
}
}
/// <summary>
/// Deletes / adds values to a many-to-many relationship
/// (assumes that the many-to-many relationship collection has an "Id" field)
/// </summary>
/// <typeparam name="TEntity">The type of entity that is being updated</typeparam>
/// <param name="dbCollection">The collection of values currently in the database</param>
/// <param name="newCollection">The new collection of values that should be in the database after update</param>
/// <param name="ctx">The database context</param>
/// <param name="idPropName">The field/column name for the primary key on the collection of entities</param>
public static void SetDbCollectionValues <TEntity>(ICollection <TEntity> dbCollection, ICollection <TEntity> newCollection, IPrimaryContext ctx, string idPropName = "Id") where TEntity : Entity, new()
{
var existingIds = new HashSet <int>(dbCollection.Select(x => (int)x.GetType().GetProperty(idPropName).GetValue(x)));
var newIds = new HashSet <int>(newCollection.Select(x => (int)x.GetType().GetProperty(idPropName).GetValue(x)));
//deleted ones
foreach (int delId in existingIds.Where(exId => !newIds.Contains(exId)))
{
dbCollection.Remove(dbCollection.Single(x => (int)x.GetType().GetProperty(idPropName).GetValue(x) == delId));
}
//new ones
foreach (int newId in newIds.Where(id => !existingIds.Contains(id)))
{
TEntity newObj = new TEntity();
newObj.GetType().GetProperty(idPropName).SetValue(newObj, newId);
ctx.Entry(newObj).State = EntityState.Unchanged;
dbCollection.Add(newObj);
}
}
/// <summary>
/// Updates a Setting.
/// </summary>
/// <param name="setting"></param>
public void UpdateSetting(Setting setting)
{
Context.Settings.Attach(setting);
Context.Entry(setting).Property(s => s.Value).IsModified = true;
Context.SaveChanges();
}
