this patch includes a fix to the sqlite adapter to support changing NOT NULL constraints on existing sqlite databases. This fix is part of rails 2.0, but not part of rails 1.2.6 which is baseline for tracks 1.5.

Also this patch includes a migration to remove the NOT NULL constaint from the position field of contexts and projects. Should solve #640

git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@722 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/db/migrate/038_projects_contexts_remove_not_null_from_position.rb

@@ -0,0 +1,22 @@
+class ProjectsContextsRemoveNotNullFromPosition < ActiveRecord::Migration
+  def self.up
+    change_column :projects, :position, :string, :null => true
+    change_column :contexts, :position, :string, :null => true
+  end
+
+  def self.down
+    @projects = Project.find(:all)
+    @projects.each do |project|
+      project.position = 0 if !project.position?
+      project.save
+    end
+    change_column :projects, :position, :string, :null => false
+
+    @contexts = Context.find(:all)
+    @contexts.each do |context|
+      context.position = 0 if !context.position?
+      context.save
+    end
+    change_column :contexts, :position, :string, :null => false
+  end
+end

tracks/vendor/rails/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -259,6 +259,7 @@ module ActiveRecord
             self.type    = type
             self.limit   = options[:limit] if options.include?(:limit)
             self.default = options[:default] if include_default
+            self.null    = options[:null] if options.include?(:null)
           end
         end
       end