Changeset 6258 for main/waeup.sirp/trunk/src/waeup/sirp/utils

Timestamp:

31 May 2011, 08:39:48 (14 years ago)

Author:

uli

Message:

Add a zope.formlib-based converter. Just playing around with
possibilities to apply string dicts to objects (in order to import CSV
data respecting invariants and all other constraints defined in some
interface).

File:

• main/waeup.sirp/trunk/src/waeup/sirp/utils/converters.py (modified) (8 diffs)

main/waeup.sirp/trunk/src/waeup/sirp/utils/converters.py

@@ -20 +20 @@
     grok.baseclass()
     grok.provides(ISchemaTypeConverter)
-    
+
     def __init__(self, context):
         """Create a converter with context, a zope.schema.Field, as context.
@@ -31 +31 @@
         """
         raise NotImplementedError('method not implemented')
-    
+
     def fromString(self, string=None, strict=True):
         """Convert ``string`` to value according to assigned field type.
@@ -82 +82 @@
             return '1'
         return '0'
-    
+
 class TextConverter(Converter):
     """A converter for zope.schema.interfaces.IText fields.
@@ -109 +109 @@
     tokens = None
     values = None
-    
+
     def __init__(self, context):
         self.context = context
@@ -125 +125 @@
         # here. This speeds up mass operations with many conversions
         # by factor 10 or more.
-        
+
         # Mapping token -> value
         self.tokens = dict([(self.context.source.factory.getToken(x), x)
@@ -192 +192 @@
 
     * ``YYYY/MM/DD``
-    
+
     * ``DD/MM/YYYY``
-    
+
     * ``D/M/YYYY``
 
@@ -213 +213 @@
     formats = ['%Y-%m-%d', '%Y/%m/%d' , '%d/%m/%Y', '%D/%M/%Y',
                '%d.%m.%Y', '%D.%M.%Y']
-    
+
     def _convertValueFromString(self, string):
         orig_string = string
@@ -238 +238 @@
     def _convertValueToString(self, value):
         return datetime.date.strftime(value, '%Y-%m-%d')
+
+
+from zope.interface import Interface
+from zope.formlib import form
+from zope.formlib.interfaces import IInputWidget
+from zope.publisher.browser import TestRequest
+
+class DefaultConverter(Converter):
+
+    grok.context(Interface)
+    grok.provides(ISchemaTypeConverter)
+
+    def __init__(self, iface):
+        self.iface = iface
+
+    def applyRowData(self, data_dict, context):
+        request = TestRequest(form={})
+        form_fields = form.Fields(self.iface)
+        for key, val in data_dict.items():
+            request.form['form.%s' % key] = val
+        widgets = form.setUpWidgets(
+            form_fields, 'form', context, request)
+        errors = form.getWidgetsData(widgets, 'form', data_dict)
+        invariant_errors = form.checkInvariants(form_fields, data_dict)
+        if not errors and not invariant_errors:
+            changed = form.applyChanges(
+                context, form_fields, data_dict)
+        return errors, invariant_errors, data_dict