#264

2026-04-09 22:44:09 +09:00
parent 7b15cb2c5a
commit b2d72ffcb0
7 changed files with 218 additions and 16 deletions
@@ -0,0 +1,80 @@
+class CreatePostVersions < ActiveRecord::Migration[8.0]
+  def change
+    create_table :post_versions do |t|
+      t.references :post, null: false, foreign_key: true
+      t.integer :version_no, null: false
+      t.string :event_type, null: false
+      t.string :title
+      t.string :url, limit: 768, null: false
+      t.string :thumbnail_base, limit: 2000
+      t.text :tags, null: false
+      t.references :parent, foreign_key: { to_table: :posts }
+      t.datetime :original_created_from
+      t.datetime :original_created_before
+      t.datetime :created_at, null: false
+      t.references :created_by_user, foreign_key: { to_table: :users }
+
+      t.index [:post_id, :version_no], unique: true
+      t.check_constraint 'version_no > 0'
+      t.check_constraint "event_type IN ('create', 'update', 'discard', 'restore')"
+    end
+
+    reversible do |dir|
+      dir.up do
+        execute <<~SQL
+          INSERT INTO
+            post_versions(
+              post_id
+            , version_no
+            , event_type
+            , title
+            , url
+            , thumbnail_base
+            , tags
+            , parent_id
+            , original_created_from
+            , original_created_before
+            , created_at
+            , created_by_user_id)
+          SELECT
+            posts.id
+          , 1
+          , 'create'
+          , posts.title
+          , posts.url
+          , posts.thumbnail_base
+          , COALESCE(tag_snapshots.tags, '')
+          , posts.parent_id
+          , posts.original_created_from
+          , posts.original_created_before
+          , posts.created_at
+          , posts.uploaded_user_id
+          FROM
+            posts
+            LEFT JOIN
+              (
+                SELECT
+                  post_tags.post_id
+                , GROUP_CONCAT(tag_names.name ORDER BY tag_names.name SEPARATOR ' ') AS tags
+                FROM
+                  post_tags
+                  INNER JOIN
+                    tags
+                    ON
+                      tags.id = post_tags.tag_id
+                  INNER JOIN
+                    tag_names
+                    ON
+                      tag_names.id = tags.tag_name_id
+                WHERE
+                  post_tags.discarded_at IS NULL
+                GROUP BY
+                  post_tags.post_id
+                ) tag_snapshots
+              ON
+                tag_snapshots.post_id = posts.id
+        SQL
+      end
+    end
+  end
+end