DEV: drop unused column flair_url from groups table. (#17179)

It's already included in the `ignored_columns` list in the group model. 03ffb0bf27/app/models/group.rb (L9)

Also, removed the `MigrateGroupFlairImages` onceoff job and spec.

app/jobs/onceoff/migrate_group_flair_images.rb

@@ -1,94 +0,0 @@
-# frozen_string_literal: true
-require 'uri'
-
-module Jobs
-  class MigrateGroupFlairImages < ::Jobs::Onceoff
-    def execute_onceoff(args)
-      column_exists = DB.exec(<<~SQL) == 1
-        SELECT 1
-        FROM INFORMATION_SCHEMA.COLUMNS
-        WHERE
-          table_schema = 'public' AND
-          table_name = 'groups' AND
-          column_name = 'flair_url'
-      SQL
-      return unless column_exists
-
-      groups = Group.where.not(flair_url: nil).select(:id, :flair_url, :flair_upload_id, :name)
-      groups.each do |group|
-        if group.flair_upload.present?
-          DB.exec("UPDATE groups SET flair_url = NULL WHERE id = #{group.id}")
-          next
-        end
-
-        old_url = group[:flair_url]
-        next if old_url.blank? || old_url !~ URI::regexp
-
-        group_name = group.name
-
-        count = 0
-        file = nil
-        sleep_interval = 5
-
-        loop do
-          url = UrlHelper.absolute_without_cdn(old_url)
-
-          begin
-            file = FileHelper.download(
-              url,
-              max_file_size: [
-                SiteSetting.max_image_size_kb.kilobytes,
-                20.megabytes
-              ].max,
-              tmp_file_name: 'tmp_group_flair_upload',
-              skip_rate_limit: true,
-              follow_redirect: true
-            )
-          rescue OpenURI::HTTPError,
-                 OpenSSL::SSL::SSLError,
-                 Net::OpenTimeout,
-                 Net::ReadTimeout,
-                 Errno::ECONNREFUSED,
-                 EOFError,
-                 SocketError,
-                 Discourse::InvalidParameters => e
-
-            logger.warn(
-              "Error encountered when trying to download from URL '#{old_url}' " +
-              "for group '#{group_name}'.\n#{e.class}: #{e.message}\n#{e.backtrace.join("\n")}"
-            )
-          end
-
-          count += 1
-          break if file || (file.blank? && count >= 3)
-
-          logger.info(
-            "Failed to download upload from #{url} for group '#{group_name}'. Retrying..."
-          )
-
-          sleep(count * sleep_interval)
-        end
-
-        next if file.blank?
-
-        upload = UploadCreator.new(
-          file,
-          "group_#{group_name}",
-          origin: UrlHelper.absolute(old_url)
-        ).create_for(Discourse.system_user.id)
-
-        if upload.errors.count > 0
-          logger.warn("Failed to create upload for '#{group_name}' group_flair: #{upload.errors.full_messages}")
-        else
-          DB.exec("UPDATE groups SET flair_url = NULL, flair_upload_id = #{upload.id} WHERE id = #{group.id}") if upload&.id.present?
-        end
-      end
-    end
-
-    private
-
-    def logger
-      Rails.logger
-    end
-  end
-end

db/post_migrate/20220621164914_drop_flair_url_from_groups.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class DropFlairUrlFromGroups < ActiveRecord::Migration[7.0]
+  DROPPED_COLUMNS ||= {
+    groups: %i{flair_url}
+  }
+
+  def up
+    DROPPED_COLUMNS.each do |table, columns|
+      Migration::ColumnDropper.execute_drop(table, columns)
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end

spec/jobs/migrate_group_flair_images_spec.rb

@@ -1,40 +0,0 @@
-# frozen_string_literal: true
-
-describe Jobs::MigrateGroupFlairImages do
-  let(:image_url) { "https://omg.aws.somestack/test.png" }
-  let(:group) { Fabricate(:group) }
-
-  before do
-    stub_request(:get, image_url).to_return(
-      status: 200, body: file_from_fixtures("smallest.png").read
-    )
-    @orig_logger = Rails.logger
-    Rails.logger = @fake_logger = FakeLogger.new
-  end
-
-  after do
-    Rails.logger = @orig_logger
-  end
-
-  it 'should migrate to the new group `flair_upload_id` column correctly' do
-    DB.exec(<<~SQL, flair_url: image_url)
-      UPDATE groups SET flair_url = :flair_url WHERE id = #{group.id}
-    SQL
-
-    expect do
-      described_class.new.execute_onceoff({})
-    end.to change { Upload.count }.by(1)
-
-    group.reload
-    upload = Upload.last
-    expect(group.flair_upload).to eq(upload)
-    expect(group.flair_url).to eq(upload.url)
-    expect(group[:flair_url]).to eq(nil)
-  end
-
-  it 'should skip groups with invalid flair URLs' do
-    DB.exec("UPDATE groups SET flair_url = 'abc' WHERE id = #{group.id}")
-    described_class.new.execute_onceoff({})
-    expect(@fake_logger.warnings.count).to eq(0)
-  end
-end