#414

backend/spec/requests/counts_download_spec.rb

@@ -84,7 +84,9 @@ RSpec.describe 'Counts native GET acknowledgement', type: :request do
     expect(response).to have_http_status(:not_found)
     job, file, attempt = ready_job('json')
     record = create(:post)
-    PostVersion.create!(post: record, version_no: 1, event_type: 'discard', title: 'private',
+    PostVersion.create!(
+        event_id: create_event!(event_type: 'unknown').id,
+        post: record, version_no: 1, event_type: 'discard', title: 'private',
         url: record.url, tags: '', tags_json: [], parent_post_ids: '', created_at: Time.utc(2024))
     get "/counts/export/files/#{ file }", params: { job:, attempt: }
     expect(response).to have_http_status(:not_found)

backend/spec/requests/counts_history_boundaries_spec.rb

@@ -8,7 +8,9 @@ RSpec.describe 'History boundaries shared with Counts', type: :request do
 
   before do
     ['create', 'discard'].each_with_index do |event, index|
-      TagDescriptionVersion.create!(tag_id: tag.id, language_code: 'ja',
+      TagDescriptionVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          tag_id: tag.id, language_code: 'ja',
           version_no: index + 1, event_type: event, body: 'private body',
           created_at: Time.utc(2024))
     end

backend/spec/requests/counts_spec.rb

@@ -10,12 +10,16 @@ RSpec.describe 'Legacy Counts API', type: :request do
                  category: 'general', sections: [] }
     [1, 2, 3].each do |number|
       time = Time.utc(2024, number == 3 ? 2 : 1, number, 0, 0)
-      PostVersion.create!(post:, version_no: number,
+      PostVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          post:, version_no: number,
           event_type: number == 1 ? 'create' : 'update',
           tags: '', url: post.url, title: "Snapshot #{ number }", parent_post_ids: '',
           tags_json: number == 1 ? [snapshot] : [],
           created_by_user: number == 3 ? nil : actor, created_at: time)
-      TagVersion.create!(tag:, version_no: number,
+      TagVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          tag:, version_no: number,
           event_type: number == 1 ? 'create' : 'update',
           name: 'counts tag', category: 'general', aliases: '', parent_tag_ids: '',
           names: { ja: { name: 'counts tag', script_code: 'Jpan',

backend/spec/requests/counts_table_spec.rb

@@ -14,7 +14,9 @@ RSpec.describe 'Counts table API', type: :request do
   end
 
   before do
-    TagVersion.create!(tag:, version_no: 1, event_type: 'create', name: 'alpha',
+    TagVersion.create!(
+        event_id: create_event!(event_type: 'unknown').id,
+        tag:, version_no: 1, event_type: 'create', name: 'alpha',
         category: 'general', aliases: '', parent_tag_ids: '',
         names: { ja: { name: 'alpha', script_code: 'Jpan', auto_generated: false,  aliases: [] } },
         created_at: Time.utc(2023))
@@ -24,7 +26,9 @@ RSpec.describe 'Counts table API', type: :request do
         { tag_id: tag.id, version_no: 1, name: 'alpha', category: 'general', sections: [] },
         { external_tag_id: external.id }]
     [1, 2, 3].each do |number|
-      PostVersion.create!(post: record, version_no: number,
+      PostVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          post: record, version_no: number,
           event_type: number == 1 ? 'create' : 'update', url: record.url,
           title: "snapshot #{ number }", tags: '', parent_post_ids: '',
           tags_json: snapshots.first(number == 1 ? 2 : (number == 2 ? 1 : 0)),
@@ -134,7 +138,9 @@ RSpec.describe 'Counts table API', type: :request do
   end
 
   it 'checks the current latest flag beyond the execution timestamp' do
-    PostVersion.create!(post: record, version_no: 4, event_type: 'update',
+    PostVersion.create!(
+        event_id: create_event!(event_type: 'unknown').id,
+        post: record, version_no: 4, event_type: 'update',
         url: record.url, title: 'after execution', tags: '', tags_json: [],
         parent_post_ids: '', created_at: Time.utc(2025, 2, 1))
     result = query
@@ -188,12 +194,16 @@ RSpec.describe 'Counts table API', type: :request do
       tag.tag_names.find_by!(language_code: 'ja', primary_flg: true)
           .update!(name: 'renamed-alpha')
       create(:tag_name, :alias, tag:, name: 'alpha-alias')
-      TagVersion.create!(tag:, version_no: 2, event_type: 'update', name: 'renamed-alpha',
+      TagVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          tag:, version_no: 2, event_type: 'update', name: 'renamed-alpha',
           category: 'general', aliases: 'alpha-alias', parent_tag_ids: '',
           names: { ja: { name: 'renamed-alpha', script_code: 'Jpan', auto_generated: false,
                          aliases: [{ name: 'alpha-alias', script_code: 'Jpan' }] } },
           created_at: Time.utc(2024, 2, 1))
-      PostVersion.create!(post: record, version_no: 4, event_type: 'update',
+      PostVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          post: record, version_no: 4, event_type: 'update',
           url: record.url, title: 'after rename', tags: '', parent_post_ids: '',
           tags_json: [{ tag_id: tag.id, version_no: 2, name: 'renamed-alpha',
                         category: 'general', sections: [] }],
@@ -257,7 +267,9 @@ RSpec.describe 'Counts table API', type: :request do
 
   it 'reports column overflow separately from malformed input' do
     101.times do |index|
-      PostVersion.create!(post: record, version_no: index + 4,
+      PostVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          post: record, version_no: index + 4,
           event_type: 'update', url: record.url, title: "column #{ index }",
           tags: '', tags_json: [], parent_post_ids: '', created_at: Time.utc(2024, 3))
     end
@@ -301,7 +313,9 @@ RSpec.describe 'Counts table API', type: :request do
         sign_in_as(create(:user, role)) if role
         # Equal timestamps deliberately require version ordering, not a date comparison.
         ['discard', 'restore', 'discard', 'restore'].each_with_index do |event, index|
-          PostVersion.create!(post: record, version_no: index + 4, event_type: event,
+          PostVersion.create!(
+              event_id: create_event!(event_type: 'unknown').id,
+              post: record, version_no: index + 4, event_type: event,
               url: record.url, title: event == 'restore' ? 'restored' : 'private snapshot',
               tags: '', tags_json: [], parent_post_ids: '', created_at: Time.utc(2024, 3))
         end
@@ -329,7 +343,9 @@ RSpec.describe 'Counts table API', type: :request do
       end
 
       it 'does not resolve private condition names even when the result set is empty' do
-        TagVersion.create!(tag:, version_no: 2, event_type: 'discard', name: 'secret tag',
+        TagVersion.create!(
+            event_id: create_event!(event_type: 'unknown').id,
+            tag:, version_no: 2, event_type: 'discard', name: 'secret tag',
             category: 'general', aliases: '', parent_tag_ids: '',
             names: { ja: { name: 'secret tag', script_code: 'Jpan', auto_generated: false, aliases: [] } },
             created_at: Time.utc(2024, 2))
@@ -345,7 +361,9 @@ RSpec.describe 'Counts table API', type: :request do
     end
   end
   it 'includes private history in the public timeline without an exclusion count' do
-    PostVersion.create!(post: record, version_no: 4, event_type: 'discard', url: record.url,
+    PostVersion.create!(
+        event_id: create_event!(event_type: 'unknown').id,
+        post: record, version_no: 4, event_type: 'discard', url: record.url,
         title: 'hidden title', tags: '', tags_json: [], parent_post_ids: '',
         created_at: Time.utc(2024, 3))
     result = query(mode: 'summary', rows: 'created_at:month', cols: 'event_type')

backend/spec/requests/materials_spec.rb

@@ -314,6 +314,7 @@ RSpec.describe 'Materials API', type: :request do
           .and change(Tag, :count).by(1)
           .and change(TagName, :count).by(1)
           .and change(MaterialVersion, :count).by(1)
+          .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:created)
 
@@ -325,6 +326,12 @@ RSpec.describe 'Materials API', type: :request do
         expect(material.file.attached?).to be(true)
         expect(material.version_no).to eq(1)
         expect(material.material_versions.first.event_type).to eq('create')
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'materials.create',
+            'created_by_user_id' => member_user.id)
+        expect(material.material_versions.first.event_id).to eq(event.fetch('id'))
+        expect(material.tag.tag_versions.pluck(:event_id)).to eq([event.fetch('id')])
         expect(material.material_export_items.first.export_path).to eq('伊地知ニジカ/created.png')
         expect(material.material_versions.first.export_paths_json).to eq(
           'legacy_drive' => '伊地知ニジカ/created.png'
@@ -509,6 +516,7 @@ RSpec.describe 'Materials API', type: :request do
             export_paths: { legacy_drive: '伊地知ニジカ/updated.jpg' }
           }
         end.to change(MaterialVersion, :count).by(2)
+            .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:ok)
 
@@ -517,6 +525,12 @@ RSpec.describe 'Materials API', type: :request do
         expect(material.tag.category).to eq('material')
         expect(material.url).to eq('https://example.com/updated-source')
         expect(material.updated_by_user).to eq(member_user)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'materials.update',
+            'created_by_user_id' => member_user.id)
+        expect(material.material_versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
+        expect(material.tag.tag_versions.pluck(:event_id)).to eq([event.fetch('id')])
         expect(material.file.attached?).to be(true)
         expect(material.file.blob.id).not_to eq(old_blob_id)
         expect(ActiveStorage::Blob.where(id: old_blob_id).exists?).to be(true)
@@ -632,6 +646,7 @@ RSpec.describe 'Materials API', type: :request do
         MaterialVersionRecorder.record!(material:, event_type: :create,
                                         created_by_user: member_user)
         TagVersioning.ensure_snapshot!(tag, created_by_user: member_user)
+        events = event_rows
 
         expect do
           put "/materials/#{ material.id }", params: {
@@ -643,6 +658,7 @@ RSpec.describe 'Materials API', type: :request do
 
         expect(response).to have_http_status(:ok)
         expect(material.reload.version_no).to eq(1)
+        expect(event_rows).to eq(events)
       end
 
       it 'records update version when only export_path changes' do
@@ -807,6 +823,12 @@ RSpec.describe 'Materials API', type: :request do
 
     it 'creates source suppression as member' do
       sign_in_as(member_user)
+      materials = ['a', 'b'].map do |name|
+        Material.create!(
+            source_kind: 'google_drive_file', source_file_id: "blocked-#{ name }",
+            source_path: "伊地知ニジカ/危険素材/#{ name }.png",
+            url: "https://example.com/blocked-#{ name }", created_by_user: member_user)
+      end
 
       expect do
         post '/materials/suppressions', params: {
@@ -815,6 +837,7 @@ RSpec.describe 'Materials API', type: :request do
           reason: 'copyright_high_risk'
         }
       end.to change(MaterialSyncSuppression, :count).by(1)
+          .and change { event_rows.length }.by(1)
 
       expect(response).to have_http_status(:created)
       expect(json).to include(
@@ -822,6 +845,14 @@ RSpec.describe 'Materials API', type: :request do
         'drive_path' => '伊地知ニジカ/危険素材',
         'normalized_source_key' => 'google_drive_path_prefix:伊地知ニジカ/危険素材'
       )
+      event = event_rows.last
+      expect(event).to include(
+          'event_type' => 'materials.block', 'created_by_user_id' => member_user.id)
+      expect(materials.map { _1.reload.discarded? }).to eq([true, true])
+      versions = MaterialVersion.where(material_id: materials.map(&:id))
+      expect(versions.where(event_type: 'discard').pluck(:material_id))
+          .to match_array(materials.map(&:id))
+      expect(versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
     end
   end
 
@@ -860,11 +891,19 @@ RSpec.describe 'Materials API', type: :request do
       end
 
       it 'discards the material and returns 204' do
-        delete "/materials/#{ material.id }"
+        expect { delete "/materials/#{ material.id }" }
+            .to change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:no_content)
         expect(Material.find_by(id: material.id)).to be_nil
         expect(Material.with_discarded.find(material.id)).to be_discarded
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'materials.destroy',
+            'created_by_user_id' => member_user.id)
+        versions = MaterialVersion.where(material_id: material.id)
+        expect(versions.order(:version_no).last.event_type).to eq('discard')
+        expect(versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
       end
     end
   end

backend/spec/requests/nico_tags_spec.rb

@@ -177,6 +177,7 @@ RSpec.describe 'NicoTags', type: :request do
         }
       }.to change(TagVersion, :count).by(2)
        .and change(NicoTagVersion, :count).by(1)
+       .and change { event_rows.length }.by(1)
 
       expect(response).to have_http_status(:ok)
 
@@ -186,6 +187,10 @@ RSpec.describe 'NicoTags', type: :request do
       linked_versions = TagVersion.where(tag: [linked_a, linked_b]).order(:tag_id)
       expect(linked_versions.map(&:event_type)).to eq(['create', 'create'])
       expect(linked_versions.map(&:created_by_user_id)).to all(eq(admin.id))
+      event = event_rows.last
+      expect(event).to include(
+          'event_type' => 'tags.update', 'created_by_user_id' => admin.id)
+      expect(linked_versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
 
       versions = nico_tag.reload.nico_tag_versions.order(:version_no)
       expect(versions.map(&:event_type)).to eq(['create', 'update'])

backend/spec/requests/posts_spec.rb

@@ -50,6 +50,8 @@ RSpec.describe 'Posts API', type: :request do
             post:,
             version_no: 1,
             event_type: 'create',
+            event_id: create_event!(
+                event_type: 'posts.create', created_by_user: post.uploaded_user).id,
             title: post.title,
             url: post.url,
             thumbnail_base: post.thumbnail_base,
@@ -1027,7 +1029,7 @@ RSpec.describe 'Posts API', type: :request do
 
     it 'dry-runs without persisting posts or new tags' do
       sign_in_as(member)
-      counts = [Post.count, Tag.count, TagName.count]
+      counts = [Post.count, Tag.count, TagName.count, event_rows.length]
 
       post '/posts?dry=1', params: post_write_params(
           title: 'dry-run post',
@@ -1043,7 +1045,7 @@ RSpec.describe 'Posts API', type: :request do
           [{ 'name' => 'new_dry_run_tag',
              'category' => 'character',
              'section_literals' => [] }])
-      expect([Post.count, Tag.count, TagName.count]).to eq(counts)
+      expect([Post.count, Tag.count, TagName.count, event_rows.length]).to eq(counts)
     end
 
     it 'dry-runs an existing URL without validating its upload' do
@@ -2218,20 +2220,20 @@ RSpec.describe 'Posts API', type: :request do
 
     def create_post_version! post, version_no:, event_type:, created_by_user:, created_at:
       PostVersion.create!(
-        post:,
-        version_no:,
-        event_type:,
-        title: post.title,
-        url: post.url,
-        thumbnail_base: post.thumbnail_base,
-        tags: snapshot_tags(post),
-        tags_json: post.snapshot_tags_json,
-        parent_post_ids: post.snapshot_parent_post_ids.join(' '),
-        original_created_from: post.original_created_from,
-        original_created_before: post.original_created_before,
-        created_at:,
-        created_by_user:
-      )
+          event_id: create_event!(event_type: 'unknown').id,
+          post:,
+          version_no:,
+          event_type:,
+          title: post.title,
+          url: post.url,
+          thumbnail_base: post.thumbnail_base,
+          tags: snapshot_tags(post),
+          tags_json: post.snapshot_tags_json,
+          parent_post_ids: post.snapshot_parent_post_ids.join(' '),
+          original_created_from: post.original_created_from,
+          original_created_before: post.original_created_before,
+          created_at:,
+          created_by_user:)
     end
 
     let!(:v1) do
@@ -2559,6 +2561,7 @@ RSpec.describe 'Posts API', type: :request do
             tags: 'spec_tag',
             thumbnail: dummy_upload)
       end.to change(PostVersion, :count).by(1)
+          .and change { event_rows.length }.by(1)
 
       expect(response).to have_http_status(:created)
 
@@ -2570,6 +2573,13 @@ RSpec.describe 'Posts API', type: :request do
       expect(version.url).to eq('https://example.com/versioned-post')
       expect(version.created_by_user_id).to eq(member.id)
       expect(version.tags).to eq(snapshot_tags(created_post))
+      event = event_rows.last
+      expect(event).to include(
+          'event_type' => 'posts.create', 'created_by_user_id' => member.id)
+      expect(version.event_id).to eq(event.fetch('id'))
+      tag_versions = TagVersion.where(tag_id: created_post.tags.select(:id))
+      expect(tag_versions).not_to be_empty
+      expect(tag_versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
     end
 
     it 'creates next version on PUT /posts/:id when snapshot changes' do
@@ -2585,6 +2595,7 @@ RSpec.describe 'Posts API', type: :request do
             title: 'updated title',
             tags: 'spec_tag_2')
       end.to change(PostVersion, :count).by(1)
+          .and change { event_rows.length }.by(1)
 
       expect(response).to have_http_status(:ok)
 
@@ -2594,6 +2605,12 @@ RSpec.describe 'Posts API', type: :request do
       expect(version.title).to eq('updated title')
       expect(version.created_by_user_id).to eq(member.id)
       expect(version.tags).to eq(snapshot_tags(post_record.reload))
+      event = event_rows.last
+      expect(event).to include(
+          'event_type' => 'posts.update', 'created_by_user_id' => member.id)
+      expect(version.event_id).to eq(event.fetch('id'))
+      tag_version = TagVersion.find_by!(tag_id: tag_name2.reload.tag_id, version_no: 1)
+      expect(tag_version.event_id).to eq(event.fetch('id'))
     end
 
     it 'does not create a new version on PUT /posts/:id when snapshot is unchanged' do
@@ -2602,6 +2619,7 @@ RSpec.describe 'Posts API', type: :request do
       PostTag.create!(post: post_record, tag: Tag.no_deerjikist)
       base_version = create_post_version_for!(post_record.reload)
 
+      events = event_rows
       expect {
         put "/posts/#{post_record.id}", params: post_write_params(
             base_version_no: base_version.version_no,
@@ -2615,10 +2633,12 @@ RSpec.describe 'Posts API', type: :request do
       expect(version.version_no).to eq(1)
       expect(version.event_type).to eq('create')
       expect(version.tags).to eq(snapshot_tags(post_record))
+      expect(event_rows).to eq(events)
     end
 
     it 'does not create a version when POST /posts is invalid' do
       sign_in_as(member)
+      events = event_rows
 
       expect do
         post '/posts', params: post_write_params(
@@ -2629,11 +2649,13 @@ RSpec.describe 'Posts API', type: :request do
       end.not_to change(PostVersion, :count)
 
       expect(response).to have_http_status(:unprocessable_entity)
+      expect(event_rows).to eq(events)
     end
 
     it 'does not create a version when PUT /posts/:id is invalid' do
       sign_in_as(member)
       base_version = create_post_version_for!(post_record)
+      events = event_rows
 
       expect do
         put "/posts/#{post_record.id}", params: post_write_params(
@@ -2645,6 +2667,7 @@ RSpec.describe 'Posts API', type: :request do
       end.not_to change(PostVersion, :count)
 
       expect(response).to have_http_status(:unprocessable_entity)
+      expect(event_rows).to eq(events)
     end
 
     it 'rejects second-bearing original created timestamps on POST /posts' do

backend/spec/requests/sitemap_entries_spec.rb

@@ -119,7 +119,9 @@ RSpec.describe 'Sitemap entries API', type: :request do
       # Legacy empty bodies can exist even though the write service rejects them.
       empty = TagDescription.create!(tag: empty_tag, language_code: 'ain',
                                      body: '', version_no: 1)
-      TagDescriptionVersion.create!(tag_id: empty_tag.id, language_code: 'ain',
+      TagDescriptionVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
+          tag_id: empty_tag.id, language_code: 'ain',
                                     body: '', version_no: 1, event_type: 'create',
                                     created_by_user_id: user.id, created_at: Time.current)
 

backend/spec/requests/tag_children_spec.rb

@@ -53,8 +53,13 @@ RSpec.describe "TagChildren", type: :request do
         expect { do_request }
           .to change { parent.reload.children.ids.include?(child.id) }
           .from(false).to(true)
+          .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:no_content)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tags.update', 'created_by_user_id' => admin.id)
+        expect(child.tag_versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
       end
 
       it 'returns 422 and does not create relation when the new link makes a cycle' do
@@ -132,6 +137,7 @@ RSpec.describe "TagChildren", type: :request do
         expect {
           do_request
         }.to change(TagVersion, :count).by(2)
+            .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:no_content)
 
@@ -140,6 +146,10 @@ RSpec.describe "TagChildren", type: :request do
         expect(versions.first.parent_tag_ids.split).to include(parent.id.to_s)
         expect(versions.second.parent_tag_ids).to eq('')
         expect(versions.second.created_by_user_id).to eq(admin.id)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tags.update', 'created_by_user_id' => admin.id)
+        expect(versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
       end
     end
 

backend/spec/requests/tag_description_wiki_spec.rb

@@ -8,6 +8,7 @@ RSpec.describe 'Tag description Wiki compatibility', type: :request do
   let!(:versions) do
     ['A', 'A', 'new-version'].each_with_index.map do |body, index|
       TagDescriptionVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
           tag_id: tag.id, language_code: 'ja', version_no: index + 1,
           event_type: index.zero? ? 'create' : 'update', body:,
           created_by_user_id: user.id, created_at: Time.current)
@@ -73,6 +74,7 @@ RSpec.describe 'Tag description Wiki compatibility', type: :request do
     let!(:other_tag) { create(:tag, primary_name: 'other_description_contract') }
     let!(:other_version) do
       TagDescriptionVersion.create!(
+          event_id: create_event!(event_type: 'unknown').id,
           tag_id: other_tag.id, language_code: 'ja', version_no: 1,
           event_type: 'create', body: 'other tag history',
           created_by_user_id: user.id, created_at: Time.current)

backend/spec/requests/tag_descriptions_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe 'Tag description native API', type: :request do
   def stored_state
     [TagDescription, TagDescriptionVersion, TagName, TagVersion].map do |model|
       model.order(:id).map(&:attributes)
-    end
+    end + [event_rows]
   end
 
   def fail_save model
@@ -91,6 +91,8 @@ RSpec.describe 'Tag description native API', type: :request do
     let!(:version) do
       TagDescriptionVersion.create!(
           tag_id: tag.id, language_code: 'ja', body: 'native version', version_no: 1,
+          event_id: create_event!(
+              event_type: 'tag_descriptions.create', created_by_user: author).id,
           event_type: 'create', created_by_user_id: author.id, created_at: Time.current)
     end
     let(:name_endpoint) { "/tags/name/#{ tag_name.name }/description" }
@@ -185,6 +187,7 @@ RSpec.describe 'Tag description native API', type: :request do
         expect { native_write(body: 'created natively') }
             .to change(TagDescription, :count).by(1)
             .and change(TagDescriptionVersion, :count).by(1)
+            .and change { event_rows.length }.by(1)
         expect(response).to have_http_status(:created)
         description = TagDescription.find_by!(tag_id: tag.id, language_code: 'ja')
         expect_current(description)
@@ -192,6 +195,10 @@ RSpec.describe 'Tag description native API', type: :request do
         expect(version).to have_attributes(
             body: 'created natively', version_no: 1, event_type: 'create',
             created_by_user_id: editor.id)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tag_descriptions.create', 'created_by_user_id' => editor.id)
+        expect(version.event_id).to eq(event.fetch('id'))
         get "/wiki/#{ description.id }"
         expect(response).to have_http_status(:ok)
         expect(json).to include('body' => description.body, 'revision_id' => version.id)
@@ -223,6 +230,7 @@ RSpec.describe 'Tag description native API', type: :request do
         expect(description.version_no).to eq(1)
         expect { native_write(body: 'after') }
             .to change(TagDescriptionVersion, :count).by(1)
+            .and change { event_rows.length }.by(1)
         expect(response).to have_http_status(:ok)
         expect(description.reload).to have_attributes(
             body: 'after', version_no: 2,
@@ -234,6 +242,10 @@ RSpec.describe 'Tag description native API', type: :request do
         expect(version).to have_attributes(
             tag_id: tag.id, language_code: 'ja', version_no: 2, event_type: 'update',
             body: 'after', created_by_user_id: editor.id)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tag_descriptions.update', 'created_by_user_id' => editor.id)
+        expect(version.event_id).to eq(event.fetch('id'))
         expect(revision.body).to eq(version.body)
         expect(description_versions(page).order(:version_no).last.body).to eq(version.body)
         get "/wiki/#{ description.id }"

backend/spec/requests/tag_groups_spec.rb

@@ -121,10 +121,14 @@ RSpec.describe 'Tag group native API', type: :request do
     [:create, :update].each do |operation|
       it "#{ operation }s structured data and keeps unplaced membership" do
         previous = group_version(group_id, 1)
-        native_write(operation)
+        expect { native_write(operation) }.to change { event_rows.length }.by(1)
         expect(response).to have_http_status(operation == :create ? :created : :ok)
         id = operation == :create ? json.fetch('id') : group_id
         number = operation == :create ? 1 : 2
+        event = event_rows.last
+        event_type = operation == :create ? 'tag_groups.create' : 'tag_groups.update'
+        expect(event).to include('event_type' => event_type, 'created_by_user_id' => user.id)
+        expect(group_version(id, number).fetch('event_id')).to eq(event.fetch('id'))
         expect_group_snapshot(
             id, number:, members: snapshot_members, placements:, description: '全体の説明')
         expect(group_version(group_id, 1)).to eq(previous)

backend/spec/requests/tag_versions_spec.rb

@@ -30,6 +30,7 @@ RSpec.describe 'TagVersions API', type: :request do
   )
     version =
         TagVersion.create!(
+            event_id: create_event!(event_type: 'unknown').id,
             tag: tag,
             version_no: version_no,
             event_type: event_type,

backend/spec/requests/tags_spec.rb

@@ -705,6 +705,7 @@ RSpec.describe 'Tags API', type: :request do
         expect {
           patch "/tags/#{tag.id}", params: { name: 'new_tag_name', category: 'meme' }
         }.to change(TagVersion, :count).by(2)
+            .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:ok)
 
@@ -719,6 +720,10 @@ RSpec.describe 'Tags API', type: :request do
         expect(version_primary_name(versions.second, 'ja')).to eq('new_tag_name')
         expect(versions.second.category).to eq('meme')
         expect(versions.second.created_by_user_id).to eq(member_user.id)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tags.update', 'created_by_user_id' => member_user.id)
+        expect(versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
       end
 
       it 'updates deprecated state and records it in tag versions' do
@@ -1275,6 +1280,7 @@ RSpec.describe 'Tags API', type: :request do
             deprecated: '0',
           }
         }.to change(TagVersion, :count).by(2)
+            .and change { event_rows.length }.by(1)
 
         expect(response).to have_http_status(:ok)
 
@@ -1290,6 +1296,10 @@ RSpec.describe 'Tags API', type: :request do
         expect(versions.second.category).to eq('meta')
         expect(version_alias_names(versions.second, 'ja')).to include('spec_tag')
         expect(versions.second.created_by_user_id).to eq(member_user.id)
+        event = event_rows.last
+        expect(event).to include(
+            'event_type' => 'tags.update', 'created_by_user_id' => member_user.id)
+        expect(versions.pluck(:event_id).uniq).to eq([event.fetch('id')])
       end
 
       it '同じ tag の旧 alias へ戻しても rename できる' do