Add ir.message and use UserWarning/UserError

cms.py

@@ -5,10 +5,11 @@ from trytond.model import ModelSQL, ModelView, fields
 from trytond.pool import Pool
 from trytond.pyson import Bool, Equal, Eval, In, Not
 from trytond import backend
-
+from trytond.i18n import gettext
 from trytond.modules.galatea.resource import GalateaVisiblePage
 from trytond.modules.galatea.tools import slugify
 from trytond.transaction import Transaction
+from .exceptions import DeleteWarning
 
 __all__ = ['Menu', 'Article', 'ArticleBlock', 'ArticleWebsite', 'Block',
     'Carousel', 'CarouselItem']
@@ -203,12 +204,6 @@ class Article(GalateaVisiblePage):
         if domain_clause not in cls.template.domain:
             cls.template.domain.append(domain_clause)
 
-        cls._error_messages.update({
-            'delete_articles': ('You can not delete '
-                'articles because you will get error 404 NOT Found. '
-                'Dissable active field.'),
-            })
-
     @classmethod
     def __register__(cls, module_name):
         TableHandler = backend.get('TableHandler')
@@ -239,7 +234,8 @@ class Article(GalateaVisiblePage):
 
     @classmethod
     def delete(cls, articles):
-        cls.raise_user_warning('delete_articles', 'delete_articles')
+        raise DeleteWarning('delete_articles',
+            gettext('galatea_cms.msg_delete_articles'))
         super(Article, cls).delete(articles)
 
     @property

exceptions.py

@@ -0,0 +1,8 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.exceptions import UserWarning
+
+
+class DeleteWarning(UserWarning):
+    pass

locale/ca.po

@@ -2,14 +2,6 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=utf-8\n"
 
-msgctxt "error:galatea.cms.article:"
-msgid ""
-"You can not delete articles because you will get error 404 NOT Found. "
-"Dissable active field."
-msgstr ""
-"No pot eliminar els articles perquè obtindria una error 404 NOT Found. "
-"Desactiva'l."
-
 msgctxt "field:galatea.cms.article,active:"
 msgid "Active"
 msgstr "Actiu"
@@ -573,6 +565,14 @@ msgctxt "model:ir.action,name:act_cms_menu_tree"
 msgid "Menus"
 msgstr "Menús"
 
+msgctxt "model:ir.message,text:msg_delete_articles"
+msgid ""
+"You can not delete articles because you will get error 404 NOT Found. "
+"Dissable active field."
+msgstr ""
+"No pot eliminar els articles perquè obtindria una error 404 NOT Found. "
+"Desactiva'l."
+
 msgctxt "model:ir.ui.menu,name:menu_cms_article_form"
 msgid "Articles"
 msgstr "Articles"

locale/es.po

@@ -2,14 +2,6 @@
 msgid ""
 msgstr "Content-Type: text/plain; charset=utf-8\n"
 
-msgctxt "error:galatea.cms.article:"
-msgid ""
-"You can not delete articles because you will get error 404 NOT Found. "
-"Dissable active field."
-msgstr ""
-"No puede eliminar este artículo para evitar el error 404 NOT Fount. "
-"Desactívalo."
-
 msgctxt "field:galatea.cms.article,active:"
 msgid "Active"
 msgstr "Activo"
@@ -573,6 +565,14 @@ msgctxt "model:ir.action,name:act_cms_menu_tree"
 msgid "Menus"
 msgstr "Menus"
 
+msgctxt "model:ir.message,text:msg_delete_articles"
+msgid ""
+"You can not delete articles because you will get error 404 NOT Found. "
+"Dissable active field."
+msgstr ""
+"No puede eliminar este artículo para evitar el error 404 NOT Fount. "
+"Desactívalo."
+
 msgctxt "model:ir.ui.menu,name:menu_cms_article_form"
 msgid "Articles"
 msgstr "Artículos"

message.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data group="1">
+        <record model="ir.message" id="msg_delete_articles">
+            <field name="text">You can not delete articles because you will get error 404 NOT Found. Dissable active field.</field>
+        </record>
+    </data>
+</tryton>

tryton.cfg

@@ -5,3 +5,4 @@ depends:
     galatea
 xml:
     cms.xml
+    message.xml