Models

Attributes, measures, and relations are the fundamental building blocks of Hashquery models. They define what is interesting about your data, and allow you to share complex expressions across your analysis with ease.

Attributes

To add attributes, use Model.with_attributes().
To use attributes, use attr.attribute_name or attr["attribute_name"] anywhere a column expression is needed.

Measures

To add measures, use Model.with_measures().
To use measures, use msr.measure_name or msr["measure_name"] anywhere an aggregating column expression is needed.

Relations

The most common way to add a relation is with a single join, using Model.with_join_one().
To use the attributes on a joined relation, use rel.relation_name.attribute_name or rel["relation_name"].attribute_name anywhere a column expression is needed.
To reference the relation itself (which is fairly rarely needed), use just rel.relation_name.