Add migration task for all_fields label

refs #645

app/services/all_fields_label_migration.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class AllFieldsLabelMigration
+  def self.run
+    Spotlight::BlacklightConfiguration.all.each do |bc|
+      bc.search_fields["all_fields"][:label] = "Keyword"
+      bc.save
+    end
+  end
+end

lib/tasks/migrate.rake

@@ -5,4 +5,9 @@ namespace :migrate do
   task date_sort: :environment do
     DateSortMigration.run
   end
+
+  desc "Migrate all_fields search field label from Everything to Keyword"
+  task all_fields_label: :environment do
+    AllFieldsLabelMigration.run
+  end
 end

spec/services/all_fields_label_migration_spec.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe AllFieldsLabelMigration do
+  # since code is changed; newly-generated exhibits will get the correct label;
+  # set them to the old label so we can test.
+  before do
+    FactoryBot.create(:exhibit)
+    FactoryBot.create(:exhibit)
+    Spotlight::BlacklightConfiguration.all.each do |bc|
+      bc.search_fields["all_fields"][:label] = "Everything"
+      bc.save
+    end
+  end
+
+  it "changes the label for all_fields search field from Everything to Keyword" do
+    expect(exhibit_configs.flatten.uniq).to eq ["Everything"]
+    expect(browse_configs.flatten.uniq).to eq ["Everything"]
+    described_class.run
+    expect(exhibit_configs.flatten.uniq).to eq ["Keyword"]
+    expect(browse_configs.flatten.uniq).to eq ["Keyword"]
+  end
+
+  def exhibit_configs
+    Spotlight::Exhibit.all.to_a.map { |e| e.blacklight_config.search_fields["all_fields"][:label] }
+  end
+
+  def browse_configs
+    Spotlight::Exhibit.all.to_a.map { |e| e.searches.first.blacklight_config.search_fields["all_fields"][:label] }
+  end
+end