Add post regenerations

db/migrate/20201121180345_create_post_regenerations.rb

@@ -0,0 +1,13 @@
+class CreatePostRegenerations < ActiveRecord::Migration[6.0]
+  def change
+    create_table :post_regenerations do |t|
+      t.timestamps
+      t.integer :creator_id, null: false
+      t.integer :post_id, null: false
+      t.string :category, null: false
+
+      t.index :creator_id
+      t.index :post_id
+    end
+  end
+end