enable preview of structured arrays

bt5/erp5_wendelin/DocumentTemplateItem/portal_components/document.erp5.DataArray.py

@@ -121,6 +121,13 @@ class DataArray(BigFile):
     Get numpy array dtype
     """
     return self.getArray().dtype
+    
+  security.declareProtected(Permissions.AccessContentsInformation, 'getArrayDtypeNames')
+  def getArrayDtypeNames(self):
+    """
+    Get numpy array dtype names
+    """
+    return self.getArray().dtype.names
 
   security.declareProtected(Permissions.View, 'index_html')
   def index_html(self, REQUEST, RESPONSE, format=_MARKER, inline=_MARKER, **kw):

bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataArray_getArrayColumnList.py

 # return columns from shape of axis 1 of ndarray
+# if it is a structured array, set column names from dtype
 # never return more than the first 100 columns
 array = context.getArray()
 
@@ -6,7 +7,9 @@ if array is None:
   return []
 
 else:
-  if len(context.getArrayShape()) < 2:
+  if context.getArrayDtypeNames() is not None:
+    return [('index', 'Index')] + [(str(i), str(i)) for i in context.getArrayDtypeNames()]
+  elif len(context.getArrayShape()) < 2:
     return [('index', 'Index'), ('1', '1')]
   else:
     return [('index', 'Index')] + [(str(i), str(i)) for i in range(min(context.getArrayShape()[1], 100))]