* Fixed ReportGroup.attribute_name to support methods and child attri…

…butes

* Created a new module 'utils.py' with once function to get attribute values
  from objects support methods and expression paths. It is used by
  ReportGroup.attribute_name and Widget.attribute_name

CHANGES

@@ -1,3 +1,10 @@
+2009-05-14: Version 0.3.0-final
+-------------------------------
+* Fixed ReportGroup.attribute_name to support methods and child attributes
+* Created a new module 'utils.py' with once function to get attribute values
+  from objects support methods and expression paths. It is used by
+  ReportGroup.attribute_name and Widget.attribute_name
+
 2009-04-30: Version 0.3.0-alpha-9
 ---------------------------------
 * Fixed a bug on group band footer calculations when there was only one object

geraldo/__init__.py

@@ -31,7 +31,7 @@
 - tests - a package with automated doc tests.
 """
 
-VERSION = (0, 3, 0, 'alpha-9')
+VERSION = (0, 3, 0, 'final')
 
 def get_version():
     return '%d.%d.%d-%s'%VERSION

geraldo/base.py

@@ -10,16 +10,6 @@
 def landscape(page_size):
     return page_size[1], page_size[0]
 
-def get_attr_value(obj, attr):
-    """This function returns a value from a object doesn't matters if the
-    attribute is a function or not"""
-    value = getattr(obj, attr)
-
-    if type(value) == types.MethodType:
-        return value()
-
-    return value
-
 class BaseReport(object):
     """Basic Report class, inherited and used to make reports adn subreports"""
 

geraldo/generators/pdf.py

@@ -6,7 +6,7 @@
 from reportlab.platypus import Paragraph, KeepInFrame
 from reportlab.lib.units import cm
 
-from geraldo.base import get_attr_value
+from geraldo.utils import get_attr_value
 from geraldo.widgets import Widget, Label, SystemField
 from geraldo.graphics import Graphic, RoundRect, Rect, Line, Circle, Arc,\
         Ellipse, Image

geraldo/utils.py

@@ -0,0 +1,24 @@
+def get_attr_value(obj, attr_path):
+    """This function gets an attribute value from an object. If the attribute
+    is a method with no arguments (or arguments with default values) it calls
+    the method. If the expression string has a path to a child attribute, it
+    supports.
+    
+    Examples:
+        
+        attribute_name = 'name'
+        attribute_name = 'name.upper'
+        attribute_name = 'customer.name.lower'
+    """
+    parts = attr_path.split('.')
+
+    val = getattr(obj, parts[0])
+
+    if len(parts) > 1:
+        val = get_attr_value(val, '.'.join(parts[1:]))
+
+    if callable(val):
+        val = val()
+
+    return val
+

geraldo/widgets.py

@@ -5,6 +5,7 @@
 from reportlab.lib.colors import black
 
 from base import BAND_WIDTH, BAND_HEIGHT, Element
+from utils import get_attr_value
 
 class Widget(Element):
     """A widget is a value representation on the report"""
@@ -79,35 +80,14 @@ class ObjectValue(Label):
     display_format = '%s'
     objects = None
 
-    def _get_part_value(self, obj, attr_path):
-        """This method exists to make possible the use of an expression in
-        "attribute_name" attribute.
-        
-        Examples:
-            
-            attribute_name = 'name.upper'
-            attribute_name = 'customer.name'
-        """
-        parts = attr_path.split('.')
-
-        val = getattr(obj, parts[0])
-
-        if len(parts) > 1:
-            val = self._get_part_value(val, '.'.join(parts[1:]))
-
-        if callable(val):
-            val = val()
-
-        return val
-
     def get_object_value(self, instance=None):
         """Return the attribute value for just an object"""
         instance = instance or self.instance
 
         if self.get_value and instance:
             return self.get_value(instance)
 
-        value = self._get_part_value(instance, self.attribute_name)
+        value = get_attr_value(instance, self.attribute_name)
 
         # For method attributes
         if type(value) == types.MethodType: