mysql - filter dropdown in sqlform,'Query' object is not callable -


I would like to insert a form with two fields: coursename, teacher_id (reference auth_user), but Shikshk_aidi field all ID Shows in Auth_user, I only want the role of the user's ID = Teacher to show in the dropdown. All users are in the same table (auth_user) I have done this: But this error shows: 'query' is not an object callable. 

  query = (db.auth_membership.user_id == db.auth_user.id) (db.auth_membership.group_id == db.auth_group.id) (db.auth_group.role == 'teacher ') db.courses.teacher_id.requires = IS_IN_DB (dB (query),' auth_user.id ') form = SQLFORM (db.courses) return dict (form = form)

thanks Xian 

  query = (db.auth_membership.user_id == db.auth_user.id) ( Db.auth_membership.group_id == db.auth_group.id) (db.auth_group.role == 'teacher')

the above does not validate the syntax. Set worthy object corner, and when the call is made, it is the second object, so you can set up chains: 

  myset = db (query1) (query2) (query3 )

If you want to work with query objects instead, you should do "and operator: 

  myquery = query1 and query2 & Amp; Query3

-

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