Source Code for Module Products.ZenUtils.Ext

 1  ########################################################################### 
 2  # 
 3  # This program is part of Zenoss Core, an open source monitoring platform. 
 4  # Copyright (C) 2007, Zenoss Inc. 
 5  # 
 6  # This program is free software; you can redistribute it and/or modify it 
 7  # under the terms of the GNU General Public License version 2 as published by 
 8  # the Free Software Foundation. 
 9  # 
10  # For complete information please visit: http://www.zenoss.com/oss/ 
11  # 
12  ########################################################################### 
13   
14  # Functions to simplify form submission return values. 
15   
16  import transaction 
17   
18  from Products.ZenUtils.jsonutils import json, unjson 
19  from Products.ZenUtils.extdirect.zope.router import ZopeDirectRouter 
20  from Products.ZenUtils.extdirect.router import DirectResponse 
21   
22 -class FormResponse(object): 
23      """ 
24      Builds a response for an Ext form. 
25      """ 
26      _errors = None 
27      _redirect = None 
28   
29 -    def has_errors(self): 
30          return bool(self._errors) 
31   
32 -    def redirect(self, url): 
33          self._redirect = url 
34   
35 -    def error(self, field_name, error_text): 
36          if self._errors is None: 
37              self._errors = {} 
38          self._errors[field_name] = error_text 
39   
40      @json 
41 -    def get_response(self): 
42          return { 
43              'success':  not self.has_errors(), 
44              'redirect': self._redirect, 
45              'errors':   self._errors or {} 
46          } 
47   
48   
49 -def form_action(f): 
50      """ 
51      Decorator for methods that are the targets of Ext form submission. 
52   
53      Provides transaction rollback, so methods can be used as their own 
54      validation without harm. 
55      """ 
56      def inner(*args, **kwargs): 
57          savepoint = transaction.savepoint() 
58          result = f(*args, **kwargs) 
59          if isinstance(result, FormResponse): 
60              if result.has_errors(): 
61                  savepoint.rollback() 
62              return result.get_response() 
63          return result 
64      return inner 
65   
66   
67 -class DirectRouter(ZopeDirectRouter): 
68      _asof = None 
69   
70 -    def _set_asof(self, asof): 
71          self._asof = asof 
72   
73 -    def __call__(self): 
74          result = unjson(super(DirectRouter, self).__call__()) 
75          return json(result) 
76