#47

backend/db/migrate/20260323192300_create_wiki_assets.rb

@@ -0,0 +1,16 @@
+class CreateWikiAssets < ActiveRecord::Migration[8.0]
+  def change
+    create_table :wiki_assets, primary_key: [:wiki_page_id, :no] do |t|
+      t.references :wiki_page, null: false, foreign_key: true, index: false
+      t.integer :no, null: false
+      t.string :alt_text
+      t.column :sha256, 'binary(32)', null: false
+      t.references :created_by_user, null: false, foreign_key: { to_table: :users }
+      t.timestamps
+    end
+
+    add_index :wiki_assets, [:wiki_page_id, :sha256], unique: true
+
+    add_column :wiki_pages, :next_asset_no, :integer, null: false, default: 1
+  end
+end