fix: package_blob.has_blake2b may be null (go-gitea#7520)

- When looking for an existing blob, has_blake2b will be null when it was created prior to v26 migration in v11, when the field was introduced.
- Add unit test and minimal refactoring to load fixtures. The AddFixture function should not be where it currently is because it cannot be used by some packages (circular import). But that's a refactor that needs to be elsewhere for backporting purposes.

Fixes https://codeberg.org/forgejo/forgejo/issues/7519
Co-authored-by: Earl Warren <[email protected]>
Co-committed-by: Earl Warren <[email protected]>

Author: earl-warren

models/fixtures/TestPackagesGetOrInsertBlob/package_blob.yml

@@ -0,0 +1,17 @@
+-
+  id: 1
+  size: 10
+  hash_md5: HASHMD5_1
+  hash_sha1: HASHSHA1_1
+  hash_sha256: HASHSHA256_1
+  hash_sha512: HASHSHA512_1
+  hash_blake2b: HASHBLAKE2B_1
+  created_unix: 946687980
+-
+  id: 2
+  size: 20
+  hash_md5: HASHMD5_2
+  hash_sha1: HASHSHA1_2
+  hash_sha256: HASHSHA256_2
+  hash_sha512: HASHSHA512_2
+  created_unix: 946687980

models/packages/main_test.go

@@ -0,0 +1,31 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package packages
+
+import (
+	"path/filepath"
+	"testing"
+
+	"forgejo.org/models/unittest"
+	"forgejo.org/modules/setting"
+
+	_ "forgejo.org/models"
+	_ "forgejo.org/models/actions"
+	_ "forgejo.org/models/activities"
+	_ "forgejo.org/models/forgefed"
+)
+
+func AddFixtures(dirs ...string) func() {
+	return unittest.OverrideFixtures(
+		unittest.FixturesOptions{
+			Dir:  filepath.Join(setting.AppWorkPath, "models/fixtures/"),
+			Base: setting.AppWorkPath,
+			Dirs: dirs,
+		},
+	)
+}
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m)
+}

models/packages/package_blob.go

@@ -44,14 +44,19 @@ func GetOrInsertBlob(ctx context.Context, pb *PackageBlob) (*PackageBlob, bool,
 
 	existing := &PackageBlob{}
 
-	has, err := e.Where(builder.Eq{
-		"size":         pb.Size,
-		"hash_md5":     pb.HashMD5,
-		"hash_sha1":    pb.HashSHA1,
-		"hash_sha256":  pb.HashSHA256,
-		"hash_sha512":  pb.HashSHA512,
-		"hash_blake2b": pb.HashBlake2b,
-	}).Get(existing)
+	has, err := e.Where(builder.And(
+		builder.Eq{
+			"size":        pb.Size,
+			"hash_md5":    pb.HashMD5,
+			"hash_sha1":   pb.HashSHA1,
+			"hash_sha256": pb.HashSHA256,
+			"hash_sha512": pb.HashSHA512,
+		},
+		builder.Or(
+			builder.Eq{"hash_blake2b": pb.HashBlake2b},
+			builder.IsNull{"hash_blake2b"},
+		),
+	)).Get(existing)
 	if err != nil {
 		return nil, false, err
 	}

models/packages/package_blob_test.go

@@ -0,0 +1,65 @@
+// Copyright 2025 The Forgejo Authors.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package packages
+
+import (
+	"testing"
+
+	"forgejo.org/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPackagesGetOrInsertBlob(t *testing.T) {
+	defer AddFixtures("models/fixtures/TestPackagesGetOrInsertBlob/")()
+	require.NoError(t, unittest.PrepareTestDatabase())
+
+	blake2bIsSet := unittest.AssertExistsAndLoadBean(t, &PackageBlob{ID: 1})
+	blake2bNotSet := unittest.AssertExistsAndLoadBean(t, &PackageBlob{ID: 2})
+
+	var blake2bSetToRandom PackageBlob
+	blake2bSetToRandom = *blake2bNotSet
+	blake2bSetToRandom.HashBlake2b = "SOMETHING RANDOM"
+
+	for _, testCase := range []struct {
+		name        string
+		exists      bool
+		packageBlob *PackageBlob
+	}{
+		{
+			name:        "exists and blake2b is not null in the database",
+			exists:      true,
+			packageBlob: blake2bIsSet,
+		},
+		{
+			name:        "exists and blake2b is null in the database",
+			exists:      true,
+			packageBlob: &blake2bSetToRandom,
+		},
+		{
+			name:   "does not exists",
+			exists: false,
+			packageBlob: &PackageBlob{
+				Size:        30,
+				HashMD5:     "HASHMD5_3",
+				HashSHA1:    "HASHSHA1_3",
+				HashSHA256:  "HASHSHA256_3",
+				HashSHA512:  "HASHSHA512_3",
+				HashBlake2b: "HASHBLAKE2B_3",
+			},
+		},
+	} {
+		t.Run(testCase.name, func(t *testing.T) {
+			found, has, _ := GetOrInsertBlob(t.Context(), testCase.packageBlob)
+			assert.Equal(t, testCase.exists, has)
+			require.NotNil(t, found)
+			if testCase.exists {
+				assert.Equal(t, found.ID, testCase.packageBlob.ID)
+			} else {
+				unittest.BeanExists(t, &PackageBlob{ID: found.ID})
+			}
+		})
+	}
+}

models/packages/package_test.go

@@ -13,18 +13,9 @@ import (
 	"forgejo.org/models/unittest"
 	user_model "forgejo.org/models/user"
 
-	_ "forgejo.org/models"
-	_ "forgejo.org/models/actions"
-	_ "forgejo.org/models/activities"
-	_ "forgejo.org/models/forgefed"
-
 	"github.com/stretchr/testify/require"
 )
 
-func TestMain(m *testing.M) {
-	unittest.MainTest(m)
-}
-
 func prepareExamplePackage(t *testing.T) *packages_model.Package {
 	require.NoError(t, unittest.PrepareTestDatabase())