FIX change some columns default value

db/migrate/20191227013202_change_forked_count_default_from_projects.rb

@@ -0,0 +1,11 @@
+class ChangeForkedCountDefaultFromProjects < ActiveRecord::Migration[5.2]
+  def change
+    change_column_default :projects, :forked_count, { from: nil, to: 0 }
+    change_column_default :projects, :project_type, { from: nil, to: 0 }
+
+    Project.find_each do |project|
+      project.update_column('forked_count', 0) if project.forked_count.nil?
+      project.update_column('project_type', 0) if project.project_type.nil?
+    end
+  end
+end