Using the following controller the first page shows up and everything works as expected until I select a next page of the grid.
First page: <Storage {'_formkey': 'c8868643-80d8-406a-b1b9-cb87304ad4aa', 'tt': 'article', '_formname': 'no_table/create', 'tabel': 'ufs'}> On the second page there is no 'tt 'nor 'tabel'. Why? The controller is below. Johann. def lys_vermiste_titels(): tabel = request.vars.tabel tt = request.vars.tt #titelveld t = Univ(db) #module with db.define_table... -----> Error occurs here. tabel == None db[tabel].id.represent = lambda value, row: A(T('check'), _href = URL(r = request, c = 'default', f = 'hanteer_vermiste_titels', vars = dict(prof_id = value, tabel = tabel, tt = tt))) query = db[tabel].titel_reg == False fields = [db[tabel].id, db[tabel][tt]] tb = SQLFORM.grid(query, #left = db.akb_articles.on(db.akb_articles.ltitle == db[tabel].ltitle), fields = fields, details = False, csv=False, maxtextlength = 140, editable = False, searchable = False, create = False, deletable = False) lengte = len(tb) if lengte: result =[] opskrif = H2(T("Title in %s and not in AKB") % tabel) else: opskrif = H2(T('All the article titles in %s are in AKB') % tabel) tb = H3(P(T('No absent titles.'))) if lengte: opskrif = H2(T("Titles in %s that are not in AKB") % tabel) else: opskrif = H2(T('All the article titles in %s are in AKB') % tabel) tb = H3(P(T('No absent titles.'))) return dict(vorm = tb, opskrif = opskrif) -- Because experiencing your loyal love is better than life itself, my lips will praise you. (Psalm 63:3)