Rake task to export default settings as seeds

lib/core_ext/big_decimal/formatting.rb

@@ -0,0 +1,14 @@
+module FixinMe
+  module BigDecimalScientificNotation
+    def to_scientific
+      return 'NaN' unless finite?
+
+      sign, coefficient, base, exponent = split
+      (sign == -1 ? '-' : '') +
+        (coefficient.length > 1 ? coefficient.insert(1, '.') : coefficient) +
+        (exponent != 1 ? "e#{exponent-1}" : '')
+    end
+  end
+end
+
+BigDecimal.prepend(FixinMe::BigDecimalScientificNotation)

lib/tasks/db.rake

@@ -0,0 +1,12 @@
+namespace :db do
+  namespace :seed do
+    desc "Dump default settings as seed data to db/seeds/*.rb"
+    task export: :environment do
+      seeds_path = Pathname.new(Rails.application.paths["db"].first) / 'seeds'
+      (seeds_path / 'templates').glob('*.erb').each do |template_path|
+        template = ERB.new(template_path.read, trim_mode: '<>')
+        (seeds_path / "#{template_path.basename('.*').to_s}.rb").write(template.result)
+      end
+    end
+  end
+end