### What? Now the gem only allow datetime hierarchies for `datetime` columns on database. It seems date fields [are also valid](https://www.postgresql.org/docs/9.1/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC) ``` Values of type date and time are cast automatically to timestamp ```
What?
Now the gem only allow datetime hierarchies for
datetimecolumns on database. It seems date fields are also valid