Problem with “Polymorphic cubes”

[thePermission]

Hey Guys, i try to follow:
https://cube.dev/docs/product/data-modeling/concepts/polymorphic-cubes
and
https://cube.dev/docs/product/data-modeling/concepts/code-reusability-extending-cubes

But i get the feeling there is some issue with defining sql and sql table
With a Cube like this:

cubes:
  - name: users
    sql_table: users

i cant write cubes like this:

cubes:
  - name: teachers
    extends: users
    sql: >
      SELECT * FROM {users.sql()} WHERE type = 'teacher'
 
  - name: students
    extends: users
    sql: >
      SELECT * FROM {users.sql()} WHERE type = 'student'

it will cause the error
You must use either sql or sqlTable within a model, but not both

[igorlukanin]

Hi @thePermission 👋

As the error suggests, you'd have to use sql instead of sql_table in the users cube. Could you please try that?

[igorlukanin]

@thePermission Did my advice help?

[thePermission]

@igorlukanin Yea but the documentation is wrong then.

[igorlukanin]

Fixed in #9473. Available in the latest.