optimize query, only select relevant db columns

lib/gitlab/gpg/invalid_gpg_signature_updater.rb

@@ -7,6 +7,7 @@ module Gitlab
 
       def run
         GpgSignature
+          .select(:id, :commit_sha, :project_id)
           .where('gpg_key_id IS NULL OR valid_signature = ?', false)
           .where(gpg_key_primary_keyid: @gpg_key.primary_keyid)
           .find_each do |gpg_signature|

spec/lib/gitlab/gpg/invalid_gpg_signature_updater_spec.rb

@@ -20,7 +20,7 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
     end
 
     before do
-      allow_any_instance_of(GpgSignature).to receive(:commit).and_return(commit)
+      allow_any_instance_of(Project).to receive(:commit).and_return(commit)
     end
 
     context 'gpg signature did have an associated gpg key which was removed later' do
@@ -41,7 +41,13 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
           key: GpgHelpers::User1.public_key,
           user: user
 
-        expect(valid_gpg_signature.reload.gpg_key).to eq gpg_key
+        expect(valid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: gpg_key,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: true
+        )
       end
 
       it 'does not assign the gpg key when an unrelated gpg key is added' do
@@ -50,7 +56,13 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
           key: GpgHelpers::User2.public_key,
           user: user
 
-        expect(valid_gpg_signature.reload.gpg_key).to be_nil
+        expect(valid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: nil,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: true
+        )
       end
     end
 
@@ -68,11 +80,17 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
 
       it 'updates the signature to being valid when the missing gpg key is added' do
         # InvalidGpgSignatureUpdater is called by the after_create hook
-        create :gpg_key,
+        gpg_key = create :gpg_key,
           key: GpgHelpers::User1.public_key,
           user: user
 
-        expect(invalid_gpg_signature.reload.valid_signature).to be_truthy
+        expect(invalid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: gpg_key,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: true
+        )
       end
 
       it 'keeps the signature at being invalid when an unrelated gpg key is added' do
@@ -81,7 +99,13 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
           key: GpgHelpers::User2.public_key,
           user: user
 
-        expect(invalid_gpg_signature.reload.valid_signature).to be_falsey
+        expect(invalid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: nil,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: false
+        )
       end
     end
 
@@ -102,7 +126,7 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
       end
 
       it 'updates the signature to being valid when the user updates the email address' do
-        create :gpg_key,
+        gpg_key = create :gpg_key,
           key: GpgHelpers::User1.public_key,
           user: user
 
@@ -111,20 +135,38 @@ RSpec.describe Gitlab::Gpg::InvalidGpgSignatureUpdater do
         # InvalidGpgSignatureUpdater is called by the after_update hook
         user.update_attributes!(email: GpgHelpers::User1.emails.first)
 
-        expect(invalid_gpg_signature.reload.valid_signature).to be_truthy
+        expect(invalid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: gpg_key,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: true
+        )
       end
 
       it 'keeps the signature at being invalid when the changed email address is still unrelated' do
-        create :gpg_key,
+        gpg_key = create :gpg_key,
           key: GpgHelpers::User1.public_key,
           user: user
 
-        expect(invalid_gpg_signature.reload.valid_signature).to be_falsey
+        expect(invalid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: gpg_key,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: false
+        )
 
         # InvalidGpgSignatureUpdater is called by the after_update hook
         user.update_attributes!(email: 'still.unrelated@example.com')
 
-        expect(invalid_gpg_signature.reload.valid_signature).to be_falsey
+        expect(invalid_gpg_signature.reload).to have_attributes(
+          project: project,
+          commit_sha: commit_sha,
+          gpg_key: gpg_key,
+          gpg_key_primary_keyid: GpgHelpers::User1.primary_keyid,
+          valid_signature: false
+        )
       end
     end
   end