diff --git a/lib/db_revision.py b/lib/db_revision.py
index 7fe99c8..3840a5b 100644
--- a/lib/db_revision.py
+++ b/lib/db_revision.py
@@ -13,12 +13,17 @@ class DBRevision:
             self.requestid,
         ) = row
 
+    def __str__(self):
+        return f"Rev {self.project}/{self.rev} Md5 {self.unexpanded_srcmd5} {self.commit_time} {self.userid} {self.requestid}"
+
+    def __repr__(self):
+        return f"[{self.__str__()}]"
+
     def links_to(self, db, project, package):
         db.cursor().execute(
             "INSERT INTO links (revision_id, project, package) VALUES (%s,%s,%s)",
             (self.dbid, project, package),
         )
-        print("links_to", project, package)
 
     @classmethod
     def import_obs_rev(cls, db, revision):
@@ -63,3 +68,36 @@ class DBRevision:
         if max:
             return DBRevision.fetch_revision(db, project, package, int(max))
         return None
+
+    @classmethod
+    def all_revisions(cls, db, project, package):
+        cur = db.cursor()
+        cur.execute(
+            "SELECT * FROM revisions where project=%s and package=%s",
+            (project, package),
+        )
+        ret = []
+        for row in cur.fetchall():
+            ret.append(DBRevision(row))
+        cur.close()
+        return ret
+
+    def linked_rev(self, db):
+        cur = db.cursor()
+        cur.execute(
+            "SELECT project,package FROM links where revision_id=%s", (self.dbid,)
+        )
+        row = cur.fetchone()
+        if not row:
+            cur.close()
+            return None
+        project, package = row
+        cur.execute(
+            "SELECT * FROM revisions where project=%s and package=%s and commit_time <= %s ORDER BY commit_time DESC LIMIT 1",
+            (project, package, self.commit_time),
+        )
+        revisions = [DBRevision(row) for row in cur.fetchall()]
+        cur.close()
+        if revisions:
+            return revisions[0]
+        return None
diff --git a/lib/importer.py b/lib/importer.py
index 2c49369..938fed4 100644
--- a/lib/importer.py
+++ b/lib/importer.py
@@ -133,7 +133,7 @@ class Importer:
             if not latest or rev.rev > latest.rev:
                 dbrev = DBRevision.import_obs_rev(db, rev)
                 root = rev.read_link()
-                if root:
+                if root is not None:
                     tprj = root.get("project") or project
                     tpkg = root.get("package") or package
                     dbrev.links_to(db, tprj, tpkg)
@@ -152,6 +152,10 @@ class Importer:
             for row in cur.fetchall():
                 (lproject, lpackage) = row
                 self.update_db_package(db, lproject, lpackage)
+
+            for rev in DBRevision.all_revisions(db, project, self.package):
+                print(rev, rev.linked_rev(db))
+
             cur.close()
 
     def import_all_revisions(self, gc):