/// <summary>
/// If no parameters are passed in, this method instructs the DataMapper to load all related entities in the graph.
/// If specific entities are passed in, only these relationships will be loaded.
/// </summary>
/// <param name="childrenToLoad">A list of related child entites to load (passed in as properties / lambda expressions).</param>
public virtual QueryBuilder <T> Graph(params Expression <Func <T, object> >[] childrenToLoad)
{
TableCollection tablesInView = new TableCollection();
if (childrenToLoad.Length > 0)
{
// Add base table
tablesInView.Add(_tables[0]);
foreach (var exp in childrenToLoad)
{
MemberInfo child = (exp.Body as MemberExpression).Member;
var node = EntGraph.Where(g => g.Member != null && g.Member.EqualsMember(child)).FirstOrDefault();
if (node != null)
{
tablesInView.Add(new Table(node.EntityType, JoinType.None));
}
if (!_childrenToLoad.ContainsMember(child))
{
_childrenToLoad.Add(child);
}
}
}
else
{
// Add all tables in the graph
foreach (var node in EntGraph)
{
tablesInView.Add(new Table(node.EntityType, JoinType.None));
}
}
// Replace the base table with a view with tables
View view = new View(_tables[0].Name, tablesInView.ToArray());
_tables.ReplaceBaseTable(view);
_isGraph = true;
return(this);
}
/// <summary>
/// Overrides the base view name that will be used in the query.
/// Will try to use the mapped "AltName" values when loading the columns.
/// </summary>
public virtual QueryBuilder <T> FromView(string viewName)
{
if (string.IsNullOrEmpty(viewName))
{
throw new ArgumentNullException("view");
}
_isFromView = true;
// Replace the base table with a view with tables
if (_tables[0] is View)
{
(_tables[0] as View).Name = viewName;
}
else
{
View view = new View(viewName, _tables.ToArray());
_tables.ReplaceBaseTable(view);
}
return(this);
}