diff -r a78ade534b97 -r d9c6b1d7fefa src/pyams_content/shared/form/field.py
--- a/src/pyams_content/shared/form/field.py	Fri May 25 08:05:13 2018 +0200
+++ b/src/pyams_content/shared/form/field.py	Fri May 25 15:48:59 2018 +0200
@@ -20,23 +20,19 @@
 from pyams_content.shared.form.interfaces import IFormFieldFactory, IFormField, IFormFieldContainer, \
     IFormFieldContainerTarget, FORM_FIELD_CONTAINER_KEY
 from pyams_i18n.interfaces import II18n
-from zope.annotation.interfaces import IAnnotations
 from zope.location.interfaces import ISublocations
 from zope.traversing.interfaces import ITraversable
 
 # import packages
 from persistent import Persistent
-from pyams_utils.adapter import adapter_config, ContextAdapter
+from pyams_utils.adapter import adapter_config, ContextAdapter, get_annotation_adapter
 from pyams_utils.registry import utility_config, get_global_registry
 from pyams_utils.request import check_request
 from pyams_utils.schema import MailAddressField
 from pyams_utils.vocabulary import vocabulary_config
-from pyramid.threadlocal import get_current_registry
 from zope.container.contained import Contained
 from zope.container.ordered import OrderedContainer
 from zope.interface import implementer
-from zope.lifecycleevent import ObjectCreatedEvent
-from zope.location import locate
 from zope.schema import TextLine, Text, Bool, Int, Decimal, URI, Date, Choice, List
 from zope.schema.fieldproperty import FieldProperty
 from zope.componentvocabulary.vocabulary import UtilityVocabulary, UtilityTerm
@@ -77,13 +73,7 @@
 @adapter_config(context=IFormFieldContainerTarget, provides=IFormFieldContainer)
 def form_field_container_factory(context):
     """Form fields container factory"""
-    annotations = IAnnotations(context)
-    container = annotations.get(FORM_FIELD_CONTAINER_KEY)
-    if container is None:
-        container = annotations[FORM_FIELD_CONTAINER_KEY] = FormFieldContainer()
-        get_current_registry().notify(ObjectCreatedEvent(container))
-        locate(container, context, '++fields++')
-    return container
+    return get_annotation_adapter(context, FORM_FIELD_CONTAINER_KEY, FormFieldContainer, name='++fields++')
 
 
 @adapter_config(name='fields', context=IFormFieldContainerTarget, provides=ITraversable)