Make disease_types not nullable

This value is always set when recording a vaccination record so we can
make the column `NOT NULL`.

Jira-Issue: MAV-2858

Author: thomasleese

app/models/vaccination_record.rb

@@ -9,7 +9,7 @@
 #  delivery_method                         :integer
 #  delivery_site                           :integer
 #  discarded_at                            :datetime
-#  disease_types                           :enum             is an Array
+#  disease_types                           :enum             not null, is an Array
 #  dose_sequence                           :integer
 #  full_dose                               :boolean
 #  local_patient_id_uri                    :string

db/migrate/20251215124426_make_vaccination_record_disease_types_not_null.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class MakeVaccinationRecordDiseaseTypesNotNull < ActiveRecord::Migration[8.1]
+  def change
+    change_column_null :vaccination_records, :disease_types, false
+  end
+end

db/schema.rb

@@ -935,7 +935,7 @@
     t.integer "delivery_method"
     t.integer "delivery_site"
     t.datetime "discarded_at"
-    t.enum "disease_types", array: true, enum_type: "disease_type"
+    t.enum "disease_types", null: false, array: true, enum_type: "disease_type"
     t.integer "dose_sequence"
     t.boolean "full_dose"
     t.string "local_patient_id"

spec/factories/vaccination_records.rb

@@ -9,7 +9,7 @@
 #  delivery_method                         :integer
 #  delivery_site                           :integer
 #  discarded_at                            :datetime
-#  disease_types                           :enum             is an Array
+#  disease_types                           :enum             not null, is an Array
 #  dose_sequence                           :integer
 #  full_dose                               :boolean
 #  local_patient_id_uri                    :string

spec/models/vaccination_record_spec.rb

@@ -9,7 +9,7 @@
 #  delivery_method                         :integer
 #  delivery_site                           :integer
 #  discarded_at                            :datetime
-#  disease_types                           :enum             is an Array
+#  disease_types                           :enum             not null, is an Array
 #  dose_sequence                           :integer
 #  full_dose                               :boolean
 #  local_patient_id_uri                    :string