Problem with PostgreSQL View layer in QGIS

I have a PostgreSQL table and view:

     CREATE TABLE lines (
      geom geometry(MultiLineString,4326),
      type character varying(254),
      login text,
      gid serial NOT NULL,
      CONSTRAINT lines_pkey PRIMARY KEY (gid))

    CREATE OR REPLACE VIEW lines_view AS 
     SELECT lines.geom,
        lines.type,
        lines.gid
       FROM lines;

    CREATE OR REPLACE RULE add AS
        ON INSERT TO lines_view DO INSTEAD  INSERT INTO lines (geom, type, login)
      VALUES (new.geom, new.type, "current_user"());

    CREATE OR REPLACE RULE del AS
        ON DELETE TO lines_view DO INSTEAD  DELETE FROM lines
        WHERE lines.login = "current_user"()::text AND lines.gid = old.gid;

     CREATE OR REPLACE RULE upd AS
      ON UPDATE TO lines_view DO INSTEAD  UPDATE lines SET geom = new.geom, type = new.type, login = "current_user"()
      WHERE lines.login = "current_user"()::text AND lines.gid = new.gid;

So, problem is when I load this lines_view in QGIS as layer and add lines, after saving I cannot use "node tool" to new lines ("Node tool: could not snap to a segment on the current layer"). But when I use move tool on them (just select "move feature(s)" button and click on new line) "node tool" start working as usual. Can some one help me with this?