Update existing 0 age values to 1

lib/tasks/correct_min_age_values.rake

@@ -0,0 +1,10 @@
+desc "Alter age values from 0 to 1"
+task correct_min_age_values: :environment do
+  LettingsLog.where(age2: 0).update_all(age2: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age3: 0).update_all(age3: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age4: 0).update_all(age4: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age5: 0).update_all(age5: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age6: 0).update_all(age6: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age7: 0).update_all(age7: 1, values_updated_at: Time.zone.now)
+  LettingsLog.where(age8: 0).update_all(age8: 1, values_updated_at: Time.zone.now)
+end

spec/lib/tasks/correct_min_age_values_spec.rb

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+require "rails_helper"
+require "rake"
+
+RSpec.describe "correct_min_age_values" do
+  describe ":correct_min_age_values", type: :task do
+    subject(:task) { Rake::Task["correct_min_age_values"] }
+
+    before do
+      Rake.application.rake_require("tasks/correct_min_age_values")
+      Rake::Task.define_task(:environment)
+      task.reenable
+    end
+
+    context "when the rake task is run" do
+      let!(:lettings_log) { create(:lettings_log, :completed) }
+
+      it "updates lettings logs with age2..8 0 to have age2..8 1" do
+        lettings_log.hhmemb = 8
+        lettings_log.age2_known = 0
+        lettings_log.age2 = 0
+        lettings_log.age3_known = 0
+        lettings_log.age3 = 0
+        lettings_log.age4_known = 0
+        lettings_log.age4 = 0
+        lettings_log.age5_known = 0
+        lettings_log.age5 = 0
+        lettings_log.age6_known = 0
+        lettings_log.age6 = 0
+        lettings_log.age7_known = 0
+        lettings_log.age7 = 0
+        lettings_log.age8_known = 0
+        lettings_log.age8 = 0
+
+        lettings_log.save!(validate: false)
+
+        task.invoke
+        lettings_log.reload
+        expect(lettings_log.age2).to eq(1)
+        expect(lettings_log.age3).to eq(1)
+        expect(lettings_log.age4).to eq(1)
+        expect(lettings_log.age5).to eq(1)
+        expect(lettings_log.age6).to eq(1)
+        expect(lettings_log.age7).to eq(1)
+        expect(lettings_log.age8).to eq(1)
+        expect(lettings_log.values_updated_at).not_to be_nil
+      end
+
+      it "does not update valid age2..8 values" do
+        lettings_log.hhmemb = 8
+        lettings_log.age2_known = 0
+        lettings_log.age2 = 2
+        lettings_log.age3_known = 0
+        lettings_log.age3 = 4
+        lettings_log.age4_known = 0
+        lettings_log.age4 = 2
+        lettings_log.age5_known = 0
+        lettings_log.age5 = 2
+        lettings_log.age6_known = 0
+        lettings_log.age6 = 3
+        lettings_log.age7_known = 0
+        lettings_log.age7 = 6
+        lettings_log.age8_known = 0
+        lettings_log.age8 = 20
+
+        lettings_log.save!(validate: false)
+
+        task.invoke
+        lettings_log.reload
+        expect(lettings_log.age2).to eq(2)
+        expect(lettings_log.age3).to eq(4)
+        expect(lettings_log.age4).to eq(2)
+        expect(lettings_log.age5).to eq(2)
+        expect(lettings_log.age6).to eq(3)
+        expect(lettings_log.age7).to eq(6)
+        expect(lettings_log.age8).to eq(20)
+        expect(lettings_log.values_updated_at).to be_nil
+      end
+    end
+  end
+end