/// <summary>
/// Adds a where clause to the query
/// </summary>
/// <param name="predicate"></param>
/// <returns>This instance so calls to this method are chainable</returns>
public virtual IQuery <T> Where(Expression <Func <T, bool> > predicate)
{
if (predicate != null)
{
var expressionHelper = new ModelToSqlExpressionHelper <T>();
string whereExpression = expressionHelper.Visit(predicate);
_wheres.Add(new Tuple <string, object[]>(whereExpression, expressionHelper.GetSqlParameters()));
}
return(this);
}