docs: def update_unit(unit, **kwargs):
      """
          Update a unit in the DB.
          Raises and exception if the unit does not exist
      """
      try:
  
          db_unit = db.DBSession.query(Unit).join(Dimension).filter(Unit.id==unit["id"]).filter().one()
  
          db_unit.name = unit["name"]
  
          # Needed to uniform into to description
          db_unit.abbreviation = unit.abbreviation
          db_unit.description = unit.description
  
          db_unit.lf = unit["lf"]
          db_unit.cf = unit["cf"]
          if "project_id" in unit and unit['project_id'] is not None and unit['project_id'] != "":
              db_unit.project_id = unit["project_id"]
      except NoResultFound:
          raise ResourceNotFoundError("Unit (ID=%s) does not exist"%(unit["id"]))
  
  
      db.DBSession.flush()
      return JSONObject(db_unit)