DEV: Update importers from PostUpload to UploadReference (#23681)

Discourse stopped using PostUpload in 9db8f00b3d. Since then, these importers have been writing to the table, but any data was totally unused. This commit updates the easy cases to use UploadReference, and adds an error to the discourse_merger import script, which needs more significant work.

script/bulk_import/discourse_merger.rb

@@ -2,6 +2,8 @@
 
 require_relative "base"
 
+raise "This importer needs to be updated from using PostUpload to UploadReference"
+
 class BulkImport::DiscourseMerger < BulkImport::Base
   NOW ||= "now()"
   CUSTOM_FIELDS = %w[category group post topic user]

script/import_scripts/bbpress.rb

@@ -310,9 +310,7 @@ class ImportScripts::Bbpress < ImportScripts::Base
               if !post.raw[html]
                 post.raw << "\n\n" << html
                 post.save!
-                unless PostUpload.where(post: post, upload: upload).exists?
-                  PostUpload.create!(post: post, upload: upload)
-                end
+                UploadReference.ensure_exist!(upload_ids: [upload.id], target: post)
               end
             end
           end
@@ -360,9 +358,7 @@ class ImportScripts::Bbpress < ImportScripts::Base
               if !post.raw[html]
                 post.raw << "\n\n" << html
                 post.save!
-                unless PostUpload.where(post: post, upload: upload).exists?
-                  PostUpload.create!(post: post, upload: upload)
-                end
+                UploadReference.ensure_exist!(upload_ids: [upload.id], target: post)
               end
             end
           end

script/import_scripts/higher_logic.rb

@@ -189,9 +189,7 @@ class ImportScripts::HigherLogic < ImportScripts::Base
 
               post.raw << "\n\n" << html
               post.save!
-              unless PostUpload.where(post: post, upload: upload).exists?
-                PostUpload.create!(post: post, upload: upload)
-              end
+              UploadReference.ensure_exist!(upload_ids: [upload.id], target: post)
             end
           end
         end

script/import_scripts/phorum.rb

@@ -270,10 +270,10 @@ class ImportScripts::Phorum < ImportScripts::Base
         if !post.raw[html]
           post.raw += "\n\n#{html}\n\n"
           post.save!
-          if PostUpload.where(post: post, upload: upl_obj).exists?
+          if UploadReference.where(target: post, upload: upl_obj).exists?
             puts "skipping creating uploaded for previously uploaded file #{upload["file_id"]}"
           else
-            PostUpload.create!(post: post, upload: upl_obj)
+            UploadReference.ensure_exist!(upload_ids: [upl_obj.id], target: post)
           end
           # PostUpload.create!(post: post, upload: upl_obj) unless PostUpload.where(post: post, upload: upl_obj).exists?
         else

script/import_scripts/smf1.rb

@@ -452,10 +452,10 @@ class ImportScripts::Smf1 < ImportScripts::Base
 
         if upload = create_upload(post.user_id, path, u["filename"])
           html = html_for_upload(upload, u["filename"])
-          unless post.raw[html] || PostUpload.where(upload: upload, post: post).exists?
+          unless post.raw[html] || UploadReference.where(upload: upload, target: post).exists?
             post.raw += "\n\n#{html}\n\n"
             post.save
-            PostUpload.create(upload: upload, post: post)
+            UploadReference.ensure_exist!(upload_ids: [upload.id], target: post)
           end
         end
 

script/import_scripts/vbulletin5.rb

@@ -439,9 +439,7 @@ class ImportScripts::VBulletin < ImportScripts::Base
         if !post.raw[html]
           post.raw += "\n\n#{html}\n\n"
           post.save!
-          unless PostUpload.where(post: post, upload: upl_obj).exists?
-            PostUpload.create!(post: post, upload: upl_obj)
-          end
+          UploadReference.ensure_exist!(upload_ids: [upl_obj.id], target: post)
         end
       else
         puts "Fail"