#308

backend/app/controllers/post_versions_controller.rb

@@ -0,0 +1,29 @@
+class PostVersionsController < ApplicationController
+  def index
+    post_id = params[:post].presence
+    tag_id = params[:tag].presence
+    page = (params[:page].presence || 1).to_i
+    limit = (params[:limit].presence || 20).to_i
+
+    page = 1 if page < 1
+    limit = 1 if limit < 1
+
+    offset = (page - 1) * limit
+
+    tag_name = nil
+    if tag_id
+      tag_name = TagName.joins(:tag).find_by(tag: { id: tag_id })
+      return render json: [] unless tag_name
+    end
+
+    q = PostVersion
+    q = q.where(post_id:) if post_id
+    q = q.where("CONCAT(' ', tags, ' ') LIKE ?", "% #{ tag_name } %") if tag_name
+
+    versions = q.order(created_at: :desc, id: :desc)
+                .limit(limit)
+                .offset(offset)
+
+    render json: { versions:, count: q.count }
+  end
+end

backend/app/controllers/posts_controller.rb

@@ -204,7 +204,7 @@ class PostsController < ApplicationController
     pts = pts.where(post_id: id) if id.present?
     pts = pts.where(tag_id:) if tag_id.present?
     pts = pts.includes(:post, :created_user, :deleted_user,
-                       tag: { tag_name: :wiki_page })
+                       tag: [:materials, { tag_name: :wiki_page }])
 
     events = []
     pts.each do |pt|