Is it possible to have several HABTM-relationships for the same object?
Example: Imagine I have 3 objects (classroom, student, teacher) and
define the associations for the student as:
class Student < ActiveRecord::Base
class Classroom < ActiveRecord::Base
class Teacher < ActiveRecord::Base
When I create a new student I have checkboxes to display and assign the
student to a set of classrooms and teachers. This seems to work, the
student is saved but only one join-table (classrooms_students) is
populated with the relation. The students_teachers table is not
populated. Changing the order of the HABTM-declarations will reverse the
problem (ie, only the first declaration works).
Is it not possible to declare several relations like this, have I just
screwed up the syntax or committed some far greater sin in how I
structured the database?