/// <summary>
/// 修改列名。
/// </summary>
/// <typeparam name="TEntity">实体类型。</typeparam>
/// <param name="name">原名称（全名包含IX_）。</param>
/// <param name="columns">新列名表达式。</param>
/// <returns>返回迁移实例。</returns>
public virtual OperationBuilder <RenameIndexOperation> RenameIndex <TEntity>(
string name,
Expression <Func <TEntity, object> > columns)
{
Check.NotEmpty(name, nameof(name));
Check.NotNull(columns, nameof(columns));
var operation = new RenameIndexOperation
{
Table = typeof(TEntity).GetTableName(),
Name = name,
};
operation.NewName = OperationHelper.GetName(NameType.Index, operation.Table, columns.GetPropertyNames());
Operations.Add(operation);
return(new OperationBuilder <RenameIndexOperation>(operation));
}
/// <summary>
/// 新建索引。
/// </summary>
/// <param name="table">表格名称。</param>
/// <param name="columns">字段列表。</param>
/// <param name="unique">是否唯一。</param>
/// <param name="clustered">是否聚合。</param>
/// <returns>返回迁移实例。</returns>
public virtual OperationBuilder <CreateIndexOperation> CreateIndex(
string table,
string[] columns,
bool unique = false,
bool clustered = false)
{
Check.NotNull(columns, nameof(columns));
var operation = new CreateIndexOperation
{
Table = table,
Columns = columns,
IsUnique = unique,
IsClustered = clustered
};
operation.Name = OperationHelper.GetName(NameType.Index, operation.Table, operation.Columns);
Operations.Add(operation);
return(new OperationBuilder <CreateIndexOperation>(operation));
}