|
public EnsureJoinsInExpression ( string expression ) : |
||
| expression | string | |
| return | ||
/// <summary>
/// Adds a field's expression to the SELECT statement with its own column name.
/// If a join alias is referenced in the field expression, and the join is defined in
/// field's entity class, it is automatically included in the query.
/// The field is marked as a target at current index for future loading from a data reader.
/// </summary>
/// <param name="field">Field object</param>
/// <returns>The query itself.</returns>
public static SqlQuery Select(this SqlQuery query, IField field)
{
if (field == null)
{
throw new ArgumentNullException("field");
}
query.EnsureJoinsInExpression(field.Expression);
new SqlQuery.Column(query, field.Expression, field.ColumnAlias, field);
return(query);
}
/// <summary>
/// Adds a field's expression to the SELECT statement with a given column name.
/// If a join alias is referenced in the field expression, and the join is defined in
/// field's entity class, it is automatically included in the query.
/// The field is marked as a target at current index for future loading from a data reader.
/// </summary>
/// <param name="field">Field object</param>
/// <returns>The query itself.</returns>
public static SqlQuery Select(this SqlQuery query, IField field, string columnName)
{
if (field == null)
{
throw new ArgumentNullException("field");
}
if (columnName == null)
{
throw new ArgumentNullException("columnName");
}
query.EnsureJoinsInExpression(field.Expression);
new SqlQuery.Column(query, field.Expression, columnName, field);
return(query);
}
