Gets rid of unique constraint on sessions index in session_checks.

consul/state/schema.go

@@ -318,7 +318,7 @@ func sessionChecksTableSchema() *memdb.TableSchema {
 			"session": &memdb.IndexSchema{
 				Name:         "session",
 				AllowMissing: false,
-				Unique:       true,
+				Unique:       false,
 				Indexer: &memdb.UUIDFieldIndex{
 					Field:     "Session",
 				},

consul/state/state_store_test.go

@@ -3480,10 +3480,22 @@ func TestStateStore_SessionCreate_SessionGet(t *testing.T) {
 		t.Fatalf("err: %s", err)
 	}
 
+	// Register a session against two checks.
+	testRegisterCheck(t, s, 5, "node1", "", "check2", structs.HealthPassing)
+	sess2 := &structs.Session{
+		ID:     testUUID(),
+		Node:   "node1",
+		Checks: []string{"check1", "check2"},
+	}
+	if err := s.SessionCreate(6, sess2); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
 	tx := s.db.Txn(false)
 	defer tx.Abort()
 
 	// Check mappings were inserted
+	{
 		check, err := tx.First("session_checks", "session", sess.ID)
 		if err != nil {
 			t.Fatalf("err: %s", err)
@@ -3499,6 +3511,21 @@ func TestStateStore_SessionCreate_SessionGet(t *testing.T) {
 		if actual := check.(*sessionCheck); !reflect.DeepEqual(actual, expectCheck) {
 			t.Fatalf("expected %#v, got: %#v", expectCheck, actual)
 		}
+	}
+	checks, err := tx.Get("session_checks", "session", sess2.ID)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	for i, check := 0, checks.Next(); check != nil; i, check = i+1, checks.Next() {
+		expectCheck := &sessionCheck{
+			Node:    "node1",
+			CheckID: fmt.Sprintf("check%d", i+1),
+			Session: sess2.ID,
+		}
+		if actual := check.(*sessionCheck); !reflect.DeepEqual(actual, expectCheck) {
+			t.Fatalf("expected %#v, got: %#v", expectCheck, actual)
+		}
+	}
 
 	// Pulling a nonexistent session gives the table index.
 	idx, session, err = s.SessionGet(testUUID())
@@ -3508,7 +3535,7 @@ func TestStateStore_SessionCreate_SessionGet(t *testing.T) {
 	if session != nil {
 		t.Fatalf("expected not to get a session: %v", session)
 	}
-	if idx != 5 {
+	if idx != 6 {
 		t.Fatalf("bad index: %d", idx)
 	}
 }