mirror of
https://github.com/scinote-eln/scinote-web.git
synced 2024-12-28 19:24:10 +08:00
34 lines
1.1 KiB
Ruby
34 lines
1.1 KiB
Ruby
class AddProjectReferenceToActivity < ActiveRecord::Migration[4.2]
|
|
def up
|
|
# Make my module reference nullable
|
|
change_column_null :activities, :my_module_id, true
|
|
|
|
# Add reference to project
|
|
add_reference :activities, :project, index: true
|
|
add_foreign_key :activities, :projects
|
|
|
|
# Update existing entries so they all have project reference
|
|
Activity.all.each do |activity|
|
|
if activity.present? and
|
|
activity.my_module.present? and
|
|
activity.my_module.project.present? then
|
|
activity.project = activity.my_module.project
|
|
activity.save
|
|
end
|
|
end
|
|
|
|
# Make project reference non-nullable
|
|
change_column_null :activities, :project_id, false
|
|
end
|
|
|
|
def down
|
|
# Unfortunately, all activities that are bound to project
|
|
# need to be deleted since they're not "compatible" in the previous
|
|
# version of the DB
|
|
Activity.destroy_all(my_module: nil)
|
|
|
|
remove_foreign_key :activities, :projects
|
|
remove_reference :activities, :project, index: true
|
|
change_column_null :activities, :my_module_id, false
|
|
end
|
|
end
|