diff --git a/fields/action.py b/fields/action.py
index e5a3dc9..ecdf479 100644
--- a/fields/action.py
+++ b/fields/action.py
@@ -15,6 +15,7 @@
 # Appy. If not, see <http://www.gnu.org/licenses/>.
 
 # ------------------------------------------------------------------------------
+import os.path
 from appy.fields import Field
 from appy.px import Px
 from appy.shared import utils as sutils
@@ -26,11 +27,10 @@ class Action(Field):
 
     # PX for viewing the Action button.
     pxView = pxCell = Px('''
-     <form name="executeAppyAction"
-           var="formId='%s_%s_form' % (zobj.UID(), name);
+     <form var="formId='%s_%s_form' % (zobj.id, name);
                 label=_(field.labelId)"
            id=":formId" action=":ztool.absolute_url() + '/do'">
-      <input type="hidden" name="action" value="ExecuteAppyAction"/>
+      <input type="hidden" name="action" value="ExecuteAction"/>
       <input type="hidden" name="objectUid" value=":zobj.id"/>
       <input type="hidden" name="fieldName" value=":name"/>
       <input if="field.confirm" type="button" class="button"
@@ -62,8 +62,6 @@ class Action(Field):
         #    message about execution of the action;
         #  * 'file' means that the result is the binary content of a file that
         #    the user will download.
-        #  * 'filetmp' is similar to file, but the file is a temp file and Appy
-        #    will delete it as soon as it will be served to the browser.
         #  * 'redirect' means that the action will lead to the user being
         #    redirected to some other page.
         self.result = result
@@ -107,6 +105,38 @@ class Action(Field):
         return res
 
     def isShowable(self, obj, layoutType):
-        if layoutType == 'edit': return False
-        else: return Field.isShowable(self, obj, layoutType)
+        if layoutType == 'edit': return
+        return Field.isShowable(self, obj, layoutType)
+
+    def onUiRequest(self, obj, rq):
+        '''This method is called when a user triggers the execution of this
+           action from the user interface.'''
+        # Execute the action (method __call__).
+        actionRes = self(obj.appy())
+        parent = obj.getParentNode()
+        parentAq = getattr(parent, 'aq_base', parent)
+        if not hasattr(parentAq, obj.id):
+            # The action has led to obj's deletion.
+            obj.reindex()
+        # Unwrap action results.
+        successfull, msg = actionRes
+        if not msg:
+            # Use the default i18n messages.
+            suffix = successfull and 'done' or 'ko'
+            msg = obj.translate('action_%s' % suffix)
+        if (self.result == 'computation') or not successfull:
+            obj.say(msg)
+            return obj.goto(obj.getUrl(rq['HTTP_REFERER']))
+        elif self.result == 'file':
+            # msg does not contain a message, but a file instance.
+            response = rq.RESPONSE
+            response.setHeader('Content-Type', sutils.getMimeType(msg.name))
+            response.setHeader('Content-Disposition', 'inline;filename="%s"' %\
+                               os.path.basename(msg.name))
+            response.write(msg.read())
+            msg.close()
+        elif self.result == 'redirect':
+            # msg does not contain a message, but the URL where to redirect
+            # the user.
+            return obj.goto(msg)
 # ------------------------------------------------------------------------------
diff --git a/gen/mixins/__init__.py b/gen/mixins/__init__.py
index 0b321ec..3dd8e2d 100644
--- a/gen/mixins/__init__.py
+++ b/gen/mixins/__init__.py
@@ -1155,54 +1155,11 @@ class BaseMixin:
         if hasattr(appyObj, 'mayEdit'): return appyObj.mayEdit()
         return True
 
-    def executeAppyAction(self, actionName, reindex=True):
-        '''Executes action with p_fieldName on this object.'''
-        appyType = self.getAppyType(actionName)
-        actionRes = appyType(self.appy())
-        parent = self.getParentNode()
-        parentAq = getattr(parent, 'aq_base', parent)
-        if not hasattr(parentAq, self.id):
-            # Else, it means that the action has led to self's deletion.
-            self.reindex()
-        return appyType.result, actionRes
-
-    def onExecuteAppyAction(self):
+    def onExecuteAction(self):
         '''This method is called every time a user wants to execute an Appy
            action on an object.'''
         rq = self.REQUEST
-        resultType, actionResult = self.executeAppyAction(rq['fieldName'])
-        successfull, msg = actionResult
-        if not msg:
-            # Use the default i18n messages
-            suffix = 'ko'
-            if successfull: suffix = 'done'
-            msg = self.translate('action_%s' % suffix)
-        if (resultType == 'computation') or not successfull:
-            self.say(msg)
-            return self.goto(self.getUrl(rq['HTTP_REFERER']))
-        elif resultType.startswith('file'):
-            # msg does not contain a message, but a file instance.
-            response = self.REQUEST.RESPONSE
-            response.setHeader('Content-Type', sutils.getMimeType(msg.name))
-            response.setHeader('Content-Disposition', 'inline;filename="%s"' %\
-                               os.path.basename(msg.name))
-            response.write(msg.read())
-            msg.close()
-            if resultType == 'filetmp':
-                # p_msg is a temp file. We need to delete it.
-                try:
-                    os.remove(msg.name)
-                    self.log('Temp file "%s" was deleted.' % msg.name)
-                except IOError, err:
-                    self.log('Could not remove temp "%s" (%s).' % \
-                             (msg.name, str(err)), type='warning')
-                except OSError, err:
-                    self.log('Could not remove temp "%s" (%s).' % \
-                             (msg.name, str(err)), type='warning')
-        elif resultType == 'redirect':
-            # msg does not contain a message, but the URL where to redirect
-            # the user.
-            return self.goto(msg)
+        return self.getAppyType(rq['fieldName']).onUiRequest(self, rq)
 
     def trigger(self, transitionName, comment='', doAction=True, doNotify=True,
                 doHistory=True, doSay=True, noSecurity=False):