Add data migration to give all Workbenches a ReferentialSuite

Existing `Workbench`es don't have associated `ReferentialSuite`s in
their `output` fields. The new requirement is that all `Workbench`es
must have a `ReferentialSuite`.

To enforce this for existing `Workbench` records, this data migration
creates new (empty) `ReferentialSuite`s for each existing `Workbench`.

Not performant at all, and I'm worried I'm missing some edge case, but
this is the gist of it.

Refs #3520

2 files changed, 13 insertions, 1 deletions

diff --git a/db/migrate/20170925154017_create_referential_suite_for_each_existing_workbench.rb b/db/migrate/20170925154017_create_referential_suite_for_each_existing_workbench.rb
new file mode 100644
index 000000000..530850a5a
--- /dev/null
+++ b/db/migrate/20170925154017_create_referential_suite_for_each_existing_workbench.rb
@@ -0,0 +1,12 @@
+class CreateReferentialSuiteForEachExistingWorkbench < ActiveRecord::Migration
+  def up
+    Workbench.where(output: nil).each do |workbench|
+      workbench.output = ReferentialSuite.create
+      workbench.save
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index e7efce531..c95280051 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170925123159) do
+ActiveRecord::Schema.define(version: 20170925154017) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"