atoti.Hierarchy.dimension_default#
- property Hierarchy.dimension_default: bool#
Whether the hierarchy is the default in its
dimension
or not.Some UIs support clicking on a dimension (or drag and dropping it) as a shortcut to add its default hierarchy to a widget.
Example
>>> table = session.create_table( ... "Sales", ... types={ ... "Product": tt.STRING, ... "Shop": tt.STRING, ... "Customer": tt.STRING, ... "Date": tt.LOCAL_DATE, ... }, ... ) >>> cube = session.create_cube(table, mode="manual") >>> h = cube.hierarchies >>> for column_name in table: ... h[column_name] = [table[column_name]] ... assert h[column_name].dimension == table.name
By default, the default hierarchy of a dimension is the first created one:
>>> h["Product"].dimension_default True >>> h["Shop"].dimension_default False >>> h["Customer"].dimension_default False >>> h["Date"].dimension_default False
There can only be one default hierarchy per dimension:
>>> h["Shop"].dimension_default = True >>> h["Product"].dimension_default False >>> h["Shop"].dimension_default True >>> h["Customer"].dimension_default False >>> h["Date"].dimension_default False
When the default hierarchy is deleted, the first created remaining one becomes the default:
>>> del h["Shop"] >>> h["Product"].dimension_default True >>> h["Customer"].dimension_default False >>> h["Date"].dimension_default False
The same thing occurs if the default hierarchy is moved to another dimension:
>>> h["Product"].dimension = "Product" >>> h["Customer"].dimension_default True >>> h["Date"].dimension_default False
Since Product is the first created hierarchy of the newly created dimension, it is the default one there:
>>> h["Product"].dimension_default True