fix db migration version check

internal/db/dbrepo/versionrepo/versionrepo.go

@@ -48,7 +48,7 @@ func (state DBVersionState) Swap(i, j int) { state[i], state[j] = state[j], stat
 // Less checks if a version is less than another
 func (state DBVersionState) Less(i, j int) bool {
 	a, b := state[i].Version, state[j].Version
-	return semver.Compare(a, b) < 0
+	return semver.Compare("v"+a, "v"+b) < 0
 }
 
 // Sort sorts this DBVersionState by the version
@@ -57,19 +57,20 @@ func (state DBVersionState) Sort() {
 }
 
 // dbHasAllVersions checks that the database is compatible with the current version; assumes that DBVersionState is ordered
-func (state DBVersionState) dBHasAllVersions() bool {
+func (state DBVersionState) dBHasAllVersions() (hasAllVersions bool, missingVersions []string) {
 	for v, cmds := range dbmigrate.Migrate {
 		if !state.dBHasVersion(v, cmds) {
-			return false
+			missingVersions = append(missingVersions, v)
 		}
 	}
-	return true
+	hasAllVersions = len(missingVersions) == 0
+	return
 }
 
 // dbHasVersion checks that the database is compatible with the passed version; assumes that DBVersionState is ordered
 func (state DBVersionState) dBHasVersion(v string, cmds dbmigrate.Commands) bool {
 	i := sort.Search(len(state), func(i int) bool {
-		return semver.Compare(state[i].Version, v) >= 0
+		return semver.Compare("v"+state[i].Version, "v"+v) >= 0
 	})
 	if i >= len(state) || state[i].Version != v { // we have to check that i really points to v
 		return false
@@ -103,7 +104,7 @@ func ConnectToVersion() {
 	if err != nil {
 		log.WithError(err).Fatal()
 	}
-	if !state.dBHasAllVersions() {
-		log.WithField("version", version.VERSION()).Fatal("database schema not updated to this server version")
+	if hasAllVersions, missingVersions := state.dBHasAllVersions(); !hasAllVersions {
+		log.WithField("server_version", version.VERSION()).WithField("missing_versions_in_db", missingVersions).Fatal("database schema not updated to this server version")
 	}
 }