Source Code for Module Products.ZenUtils.Ext

 1  ############################################################################## 
 2  #  
 3  # Copyright (C) Zenoss, Inc. 2007, all rights reserved. 
 4  #  
 5  # This content is made available according to terms specified in 
 6  # License.zenoss under the directory where your Zenoss product is installed. 
 7  #  
 8  ############################################################################## 
 9   
10   
11  # Functions to simplify form submission return values. 
12   
13  import transaction 
14   
15  from Products.ZenUtils.jsonutils import json, unjson 
16  from Products.ZenUtils.extdirect.zope.router import ZopeDirectRouter as DirectRouter 
17  from Products.ZenUtils.extdirect.router import DirectResponse 
18   
19 -class FormResponse(object): 
20      """ 
21      Builds a response for an Ext form. 
22      """ 
23      _errors = None 
24      _redirect = None 
25   
26 -    def has_errors(self): 
27          return bool(self._errors) 
28   
29 -    def redirect(self, url): 
30          self._redirect = url 
31   
32 -    def error(self, field_name, error_text): 
33          if self._errors is None: 
34              self._errors = {} 
35          self._errors[field_name] = error_text 
36   
37      @json 
38 -    def get_response(self): 
39          return { 
40              'success':  not self.has_errors(), 
41              'redirect': self._redirect, 
42              'errors':   self._errors or {} 
43          } 
44   
45   
46 -def form_action(f): 
47      """ 
48      Decorator for methods that are the targets of Ext form submission. 
49   
50      Provides transaction rollback, so methods can be used as their own 
51      validation without harm. 
52      """ 
53      def inner(*args, **kwargs): 
54          savepoint = transaction.savepoint() 
55          result = f(*args, **kwargs) 
56          if isinstance(result, FormResponse): 
57              if result.has_errors(): 
58                  savepoint.rollback() 
59              return result.get_response() 
60          return result 
61      return inner 
62