canvas-lms/db/migrate/20130610174505_add_foreign_...

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class AddForeignKeys3 < ActiveRecord::Migration[4.2]
disable_ddl_transaction!
tag :postdeploy
def self.up
add_foreign_key_if_not_exists :content_tags, :cloned_items, :delay_validation => true
add_foreign_key_if_not_exists :content_tags, :context_modules, :delay_validation => true
add_foreign_key_if_not_exists :context_external_tools, :cloned_items, :delay_validation => true
add_foreign_key_if_not_exists :context_modules, :cloned_items, :delay_validation => true
add_foreign_key_if_not_exists :course_sections, :enrollment_terms, :delay_validation => true
add_foreign_key_if_not_exists :course_sections, :courses, :column => :nonxlist_course_id, :delay_validation => true
add_foreign_key_if_not_exists :course_sections, :accounts, :column => :root_account_id, :delay_validation => true
add_foreign_key_if_not_exists :courses, :accounts, :delay_validation => true
add_foreign_key_if_not_exists :courses, :enrollment_terms, :delay_validation => true
add_foreign_key_if_not_exists :courses, :accounts, :column => :root_account_id, :delay_validation => true
add_foreign_key_if_not_exists :courses, :courses, :column => :template_course_id, :delay_validation => true
add_foreign_key_if_not_exists :courses, :wikis, :delay_validation => true
end
def self.down
remove_foreign_key_if_exists :courses, :wikis
remove_foreign_key_if_exists :courses, :column => :template_course_id
remove_foreign_key_if_exists :courses, :column => :root_account_id
remove_foreign_key_if_exists :courses, :enrollment_terms
remove_foreign_key_if_exists :courses, :accounts
remove_foreign_key_if_exists :course_sections, :column => :root_account_id
remove_foreign_key_if_exists :course_sections, :column => :nonxlist_course_id
remove_foreign_key_if_exists :course_sections, :enrollment_terms
remove_foreign_key_if_exists :context_modules, :cloned_items
remove_foreign_key_if_exists :context_external_tools, :cloned_items
remove_foreign_key_if_exists :content_tags, :context_modules
remove_foreign_key_if_exists :content_tags, :cloned_items
end
end