drop SisCrossListedSection

it's ancient cruft

test plan: n/a

Change-Id: I20912454e9b35be4a292efff33a5fe2913f0bd09
Reviewed-on: https://gerrit.instructure.com/7169
Tested-by: Hudson <hudson@instructure.com>
Reviewed-by: JT Olds <jt@instructure.com>

app/models/course_section.rb

@@ -20,11 +20,10 @@ class CourseSection < ActiveRecord::Base
   include Workflow
 
   attr_protected :sis_source_id, :sis_batch_id, :course_id,
-      :root_account_id, :enrollment_term_id, :sis_cross_listed_section_id, :sis_cross_listed_section_sis_batch_id
+      :root_account_id, :enrollment_term_id
   belongs_to :course
   belongs_to :nonxlist_course, :class_name => 'Course'
   belongs_to :root_account, :class_name => 'Account'
-  belongs_to :sis_cross_listed_section
   belongs_to :account
   has_many :enrollments, :include => :user, :conditions => ['enrollments.workflow_state != ?', 'deleted'], :dependent => :destroy
   has_many :students, :through => :student_enrollments, :source => :user, :order => User.sortable_name_order_by_clause

app/models/sis_cross_listed_section.rb

@@ -1,24 +0,0 @@
-#
-# Copyright (C) 2011 Instructure, Inc.
-#
-# This file is part of Canvas.
-#
-# Canvas is free software: you can redistribute it and/or modify it under
-# the terms of the GNU Affero General Public License as published by the Free
-# Software Foundation, version 3 of the License.
-#
-# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
-# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Affero General Public License along
-# with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-class SisCrossListedSection < ActiveRecord::Base
-  named_scope :account_sections, lambda{|account, *source_ids|
-    {:conditions => {:root_account_id => account.id, :sis_source_id => source_ids}, :order => :sis_source_id }
-  }
-  attr_accessible
-end

config/initializers/dropped_columns.rb

@@ -19,6 +19,7 @@
 class ActiveRecord::Base
   DROPPED_COLUMNS = {
     'attachments' => %w(enrollment_id),
+    'course_sections' => %w(sis_cross_listed_section_id sis_cross_listed_section_sis_batch_id),
     'courses' => %w(section hidden_tabs),
     'users' => %w(type),
     'role_overrides' => %w(context_code),

db/migrate/20111128205419_drop_sis_cross_listed_section.rb

@@ -0,0 +1,11 @@
+class DropSisCrossListedSection < ActiveRecord::Migration
+  def self.up
+    remove_column :course_sections, :sis_cross_listed_section_id
+    remove_column :course_sections, :sis_cross_listed_section_sis_batch_id
+    drop_table :sis_cross_listed_sections
+  end
+
+  def self.down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end