迁移quill编辑器的内容为md

db/migrate/20200429085544_change_quill_to_md.rb

@@ -0,0 +1,69 @@
+class ChangeQuillToMd < ActiveRecord::Migration[5.2]
+  #迁移quill编辑器的内容为md
+  def change
+    migrate_time = Time.current - 20.days 
+
+    all_issues = Issue.where("updated_on > ?", migrate_time)
+    pros = PullRequest.where("updated_at > ?", migrate_time)
+    journals = Journal.where("created_on > ?", migrate_time)
+
+
+    Issue.transaction do
+      if all_issues.size > 0 
+        all_issues.each do |i|
+          description = i.description
+          if description.present? && description.include?("insert")
+            new_content = change_content(description)
+            i.update_attribute(:description, new_content)
+          end
+          puts "__update_issue_content_____id:#{i.id}__"
+        end
+      end
+    end
+
+    Journal.transaction do 
+      if journals.size > 0
+        journals.each do |j|
+          description = j.notes
+          if description.present? && description.include?("insert")
+            new_content = change_content(description)
+            j.update_attribute(:notes, new_content)
+          end
+          puts "__update_journal_content_____id:#{j.id}__"
+        end
+      end
+      
+    end
+
+    PullRequest.transaction do 
+      if pros.size > 0
+        pros.each do |p|
+          description = p.body
+          if description.present? && description.include?("insert")
+            new_content = change_content(description)
+            p.update_attribute(:body, new_content)
+          end
+          puts "__update_pull_request_content_____id:#{p.id}__"
+        end
+      end
+    end
+  end
+
+  def change_content(content)
+    puts "####________content_____######{content}"
+    new_content = ""
+    return "" if content.blank?
+    desc = JSON.parse(content)["ops"]
+    unless desc.length > 0
+      desc.each do |d|
+        image = d["insert"]["image"]
+        if image.present?
+          new_content += "![#{image['alt']}](#{image['url']})"
+        else
+          new_content += d["insert"].gsub("\n", "")
+        end
+      end
+    end
+    new_content
+  end
+end