db(...).select().group_by_value(db.table.field), thanks Yair

VERSION

@@ -1 +1 @@
-Version 1.99.4 (2012-02-21 16:25:39) stable
+Version 1.99.4 (2012-02-22 11:32:05) stable

applications/examples/views/default/who.html

@@ -120,9 +120,9 @@
 </li><li>Thadeus Burgess (validators)
 </li><li>Tim Michelsen (Sphinx documentation)
 </li><li>Timothy Farrell (python 2.6 compliance, windows support)
-</li><li>Yair Eshel (internationalizaiton)
+</li><li>Yair Eshel (internationalizaiton, DAL improvement)
 </li><li>Yannis Aribaud (CAS compliance)
-</li><li>Yarko Tymciurak (design, Sphinx documentation)
+</li><li>Yarko Tymciurak (design)
 </li><li>Younghyun Jo (internationalization)
 </li><li>Vidul Nikolaev Petrov (captcha)
 </li><li>Vinicius Assef

gluon/dal.py

@@ -7624,6 +7624,23 @@ class Rows(object):
         """
         return Rows(self.db,sorted(self,key=f,reverse=reverse),self.colnames)
 
+    def group_by_value(self, field):
+        """
+        regroups the rows, by one of the fields
+        """
+        if not self.records:
+            return {}
+        key = str(field)
+        grouped_row_group = dict()
+
+        for row in self:
+            value = row[key]
+            if not value in grouped_row_group:
+                grouped_row_group[value] = [row]
+            else:
+                grouped_row_group[value].append(row)
+        return grouped_row_group
+
     def as_list(self,
                 compact=True,
                 storage_to_dict=True,
@@ -8000,3 +8017,4 @@ if __name__ == '__main__':
     import doctest
     doctest.testmod()
 
+