rake create slug

lib/tasks/create_slug.rake

+namespace :create_slug do
+  desc 'Create slug model Location'
+  task locations: :environment do
+    Location.all.each do |location|
+      location.update_attributes(slug: "")
+    end
+  end
+
+  desc 'Create slug model Industry' 
+  task industries: :environment do
+    Industry.all.each do |industry|
+      industry.update_attributes(slug: "")
+    end
+  end
+
+  desc 'Create slug to all model'
+  task all: %i[locations industries]
+end