/// <summary>
/// Appends the current property name, e.g. <c>"Item.MyValue"</c>, to the attribute buffer.
/// </summary>
/// <param name="attribute">The current attribute</param>
/// <param name="tblAlias">An alias to qualify the property name with.</param>
/// <param name="propName">A name to suffix the property name with.</param>
/// <returns>A new attribute containing the appended buffer.</returns>
public static IProjectionAttribute Prop(this IProjectionAttribute attribute, string tblAlias = null, string propName = null)
{
if ((propName == null || attribute.Field != null) && attribute.Metadata.HasFlag(RelationMetadataFlags.Model))
{
throw ProjectionException.FromProjection(attribute, "Cannot reference model directly.");
}
if (attribute.Field != null)
{
IField field = attribute.Field();
ColumnBinding binding = new ColumnBinding(field.Identity.Name, field);
propName = attribute.Context.Domain.Dialect.Identifier(binding.ColumnName);
return(attribute.Append(propName).Append(binding));
}
else
{
string fullName = attribute.Metadata.Identity.Name;
if (propName != null)
{
fullName = attribute.Identity.Schema.Notation.Combine(fullName, propName);
}
if (tblAlias != null)
{
attribute = attribute.Append(attribute.Context.Domain.Dialect.Identifier(tblAlias));
attribute = attribute.Append(attribute.Context.Domain.Dialect.Qualifier);
}
return(attribute.Append(attribute.Context.Domain.Dialect.Identifier(fullName)));
}
}
public static IField GetFieldValue(IProjectionAttribute attribute)
{
if (attribute.Field == null)
{
throw ProjectionException.ValueNotFound(attribute);
}
return(attribute.Field());
}
