diff --git a/app/models/absences.py b/app/models/absences.py
index 658a390d..bbff2c5c 100644
--- a/app/models/absences.py
+++ b/app/models/absences.py
@@ -4,9 +4,6 @@
 """
 
 from app import db
-from app.models import APO_CODE_STR_LEN
-from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 
 
 class Absence(db.Model):
diff --git a/app/models/entreprises.py b/app/models/entreprises.py
index bdb5672a..c5d05e93 100644
--- a/app/models/entreprises.py
+++ b/app/models/entreprises.py
@@ -4,9 +4,6 @@
 """
 
 from app import db
-from app.models import APO_CODE_STR_LEN
-from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 
 
 class Entreprise(db.Model):
diff --git a/app/models/etudiants.py b/app/models/etudiants.py
index 0ae36bd2..9c8457fa 100644
--- a/app/models/etudiants.py
+++ b/app/models/etudiants.py
@@ -8,9 +8,6 @@ from flask import g, url_for
 
 from app import db
 from app import models
-from app.models import APO_CODE_STR_LEN
-from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 
 
 class Identite(db.Model):
diff --git a/app/models/evaluations.py b/app/models/evaluations.py
index e0733fb7..4f06fb75 100644
--- a/app/models/evaluations.py
+++ b/app/models/evaluations.py
@@ -4,9 +4,6 @@
 """
 
 from app import db
-from app.models import APO_CODE_STR_LEN
-from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 from app.models import UniteEns
 
 import app.scodoc.notesdb as ndb
diff --git a/app/models/events.py b/app/models/events.py
index 0cdd7e93..55b34d38 100644
--- a/app/models/events.py
+++ b/app/models/events.py
@@ -4,9 +4,7 @@
 """
 
 from app import db
-from app.models import APO_CODE_STR_LEN
 from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 
 
 class Scolog(db.Model):
diff --git a/app/models/groups.py b/app/models/groups.py
index 688744b0..902298cc 100644
--- a/app/models/groups.py
+++ b/app/models/groups.py
@@ -5,9 +5,7 @@
 from typing import Any
 
 from app import db
-from app.models import APO_CODE_STR_LEN
 from app.models import SHORT_STR_LEN
-from app.models import CODE_STR_LEN
 from app.models import GROUPNAME_STR_LEN
 
 
diff --git a/app/models/notes.py b/app/models/notes.py
index df2766d0..fa8dc8d1 100644
--- a/app/models/notes.py
+++ b/app/models/notes.py
@@ -4,7 +4,6 @@
 """
 
 from app import db
-from app.models import APO_CODE_STR_LEN
 from app.models import SHORT_STR_LEN
 from app.models import CODE_STR_LEN
 
diff --git a/app/scodoc/notesdb.py b/app/scodoc/notesdb.py
index 5418c3ce..3de5c281 100644
--- a/app/scodoc/notesdb.py
+++ b/app/scodoc/notesdb.py
@@ -265,8 +265,11 @@ def DBUpdateArgs(cnx, table, vals, where=None, commit=False, convert_empty_to_nu
         cursor.execute(req, vals)
         # log('req=%s\n'%req)
         # log('vals=%s\n'%vals)
+    except psycopg2.errors.StringDataRightTruncation:
+        cnx.rollback()
+        raise ScoValueError("champs de texte trop long !")
     except:
-        cnx.commit()  # get rid of this transaction
+        cnx.rollback()  # get rid of this transaction
         log('Exception in DBUpdateArgs:\n\treq="%s"\n\tvals="%s"\n' % (req, vals))
         raise  # and re-raise exception
     if commit:
diff --git a/app/scodoc/sco_edit_formation.py b/app/scodoc/sco_edit_formation.py
index bd01abae..4901f494 100644
--- a/app/scodoc/sco_edit_formation.py
+++ b/app/scodoc/sco_edit_formation.py
@@ -33,6 +33,7 @@ from flask import g, url_for, request
 
 from app import db
 from app import log
+from app.models import SHORT_STR_LEN
 from app.models.formations import Formation
 from app.models.modules import Module
 
@@ -209,6 +210,7 @@ def formation_edit(formation_id=None, create=False):
                     "size": 12,
                     "title": "Code formation",
                     "explanation": "code interne. Toutes les formations partageant le même code sont compatibles (compensation de semestres, capitalisation d'UE).  Laisser vide si vous ne savez pas, ou entrer le code d'une formation existante.",
+                    "validator": lambda val, _: len(val) < SHORT_STR_LEN,
                 },
             ),
             (
diff --git a/app/scodoc/sco_edit_module.py b/app/scodoc/sco_edit_module.py
index 24232164..ee87f7e7 100644
--- a/app/scodoc/sco_edit_module.py
+++ b/app/scodoc/sco_edit_module.py
@@ -32,6 +32,7 @@ import flask
 from flask import url_for, render_template
 from flask import g, request
 from flask_login import current_user
+from app.models import APO_CODE_STR_LEN
 from app.models import Matiere, Module, UniteEns
 
 import app.scodoc.notesdb as ndb
@@ -397,21 +398,21 @@ def module_delete(module_id=None):
         return flask.redirect(dest_url)
 
 
-def do_module_edit(val):
+def do_module_edit(vals: dict) -> None:
     "edit a module"
     from app.scodoc import sco_edit_formation
 
     # check
-    mod = module_list({"module_id": val["module_id"]})[0]
+    mod = module_list({"module_id": vals["module_id"]})[0]
     if module_is_locked(mod["module_id"]):
         # formation verrouillée: empeche de modifier certains champs:
         protected_fields = ("coefficient", "ue_id", "matiere_id", "semestre_id")
         for f in protected_fields:
-            if f in val:
-                del val[f]
+            if f in vals:
+                del vals[f]
     # edit
     cnx = ndb.GetDBConnexion()
-    _moduleEditor.edit(cnx, val)
+    _moduleEditor.edit(cnx, vals)
     Formation.query.get(mod["formation_id"]).invalidate_cached_sems()
 
 
@@ -604,6 +605,7 @@ def module_edit(module_id=None):
                 "title": "Code Apogée",
                 "size": 25,
                 "explanation": "(optionnel) code élément pédagogique Apogée ou liste de codes ELP séparés par des virgules",
+                "validator": lambda val, _: len(val) < APO_CODE_STR_LEN,
             },
         ),
         (
diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index cdc83a04..192ed8d3 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -33,6 +33,7 @@ from flask import url_for, render_template
 from flask import g, request
 from flask_login import current_user
 
+from app.models import APO_CODE_STR_LEN
 from app.models import Formation, UniteEns, ModuleImpl, Module
 import app.scodoc.notesdb as ndb
 import app.scodoc.sco_utils as scu
@@ -324,6 +325,7 @@ def ue_edit(ue_id=None, create=False, formation_id=None):
                 "title": "Code Apogée",
                 "size": 25,
                 "explanation": "(optionnel) code élément pédagogique Apogée ou liste de codes ELP séparés par des virgules",
+                "validator": lambda val, _: len(val) < APO_CODE_STR_LEN,
             },
         ),
         (
diff --git a/app/scodoc/sco_formsemestre_edit.py b/app/scodoc/sco_formsemestre_edit.py
index 2f9308f7..bf90fe26 100644
--- a/app/scodoc/sco_formsemestre_edit.py
+++ b/app/scodoc/sco_formsemestre_edit.py
@@ -33,6 +33,7 @@ from flask_login import current_user
 
 from app import db
 from app.auth.models import User
+from app.models import APO_CODE_STR_LEN, SHORT_STR_LEN
 from app.models import ModuleImpl, Evaluation, EvaluationUEPoids
 import app.scodoc.notesdb as ndb
 import app.scodoc.sco_utils as scu
@@ -359,6 +360,7 @@ def do_formsemestre_createwithmodules(edit=False):
     mf_manual = {
         "size": 12,
         "template": '<tr%(item_dom_attr)s><td class="tf-fieldlabel">%(label)s</td><td class="tf-field">%(elem)s',
+        "validator": lambda val, _: len(val) < APO_CODE_STR_LEN,
     }
     if etapes:
         mf = {
@@ -495,6 +497,7 @@ def do_formsemestre_createwithmodules(edit=False):
                 "size": 8,
                 "title": "Couleur fond des bulletins",
                 "explanation": "version web seulement (ex: #ffeeee)",
+                "validator": lambda val, _: len(val) < SHORT_STR_LEN,
             },
         ),
         (
diff --git a/app/scodoc/sco_groups.py b/app/scodoc/sco_groups.py
index da46270d..44aa7797 100644
--- a/app/scodoc/sco_groups.py
+++ b/app/scodoc/sco_groups.py
@@ -45,6 +45,7 @@ from flask import g, request
 from flask import url_for, make_response
 
 from app import db
+from app.models import GROUPNAME_STR_LEN, SHORT_STR_LEN
 from app.models.groups import Partition
 import app.scodoc.sco_utils as scu
 import app.scodoc.notesdb as ndb
@@ -870,10 +871,11 @@ def editPartitionForm(formsemestre_id=None):
             page_title="Partitions...",
             javascripts=["js/editPartitionForm.js"],
         ),
+        # limite à SHORT_STR_LEN
         r"""<script type="text/javascript">
           function checkname() {
  var val = document.editpart.partition_name.value.replace(/^\s+/, "").replace(/\s+$/, "");
- if (val.length > 0) {
+ if ((val.length > 0)&&(val.length < 32)) {
    document.editpart.ok.disabled = false;
  } else {
    document.editpart.ok.disabled = true;
@@ -1124,6 +1126,7 @@ def partition_rename(partition_id):
                     "default": partition["partition_name"],
                     "allow_null": False,
                     "size": 12,
+                    "validator": lambda val, _: len(val) < SHORT_STR_LEN,
                 },
             ),
         ),
@@ -1231,6 +1234,7 @@ def group_rename(group_id):
                     "default": group["group_name"],
                     "size": 12,
                     "allow_null": False,
+                    "validator": lambda val, _: len(val) < GROUPNAME_STR_LEN,
                 },
             ),
         ),
diff --git a/app/static/js/groupmgr.js b/app/static/js/groupmgr.js
index de0e512d..690b7f52 100644
--- a/app/static/js/groupmgr.js
+++ b/app/static/js/groupmgr.js
@@ -256,6 +256,10 @@ function createGroup() {
         alert("Nom de groupe vide !");
         return false;
     }
+    if (group_name.length >= 32) { // SHORT_STR_LEN
+        alert("Nom de groupe trop long !");
+        return false;
+    }
     // check name:
     for (var group_id in groupBoxes) {
         if (group_id != 'extend') {
diff --git a/app/templates/scolar/affect_groups.html b/app/templates/scolar/affect_groups.html
index 56393575..8d01eca3 100644
--- a/app/templates/scolar/affect_groups.html
+++ b/app/templates/scolar/affect_groups.html
@@ -1,4 +1,4 @@
-
+{# -*- mode: jinja-html -*- #} 
 {{ sco_header|safe }}
 <h2 class="formsemestre">Affectation aux groupes de {{ partition["partition_name"] }}</h2>