- Forces relations to have correct attribute names

git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@296 014f5005-505e-4b48-8d0a-63407b615a7c

CHANGELOG

@@ -1,5 +1,6 @@
 1.1
 - Incorrect relational operations now raise an exception instead of returning None
+- Forces relations to have correct names for attributes
 
 1.0
 - Adds history in the GUI

relational/relation.py

@@ -512,6 +512,10 @@ class header (object):
         '''Accepts a list with attributes' names. Names MUST be unique'''
         self.attributes=attributes
         
+        for i in attributes:
+            if not is_valid_relation_name(i):
+                raise Exception('"%s" is not a valid attribute name'% i)
+        
     def __repr__(self):
         return "header(%s)" % (self.attributes.__repr__())
         
@@ -519,6 +523,10 @@ class header (object):
     def rename(self,old,new):
         '''Renames a field. Doesn't check if it is a duplicate.
         Returns True if the field was renamed, False otherwise'''
+        
+        if not is_valid_relation_name(new):
+            raise Exception('%s is not a valid attribute name'% new)
+        
         try:
             id_=self.attributes.index(old)
             self.attributes[id_]=new

relational_gui/guihandler.py

@@ -190,11 +190,19 @@ class relForm(QtGui.QMainWindow):
             #Patch provided by Angelo 'Havoc' Puglisi
             name=str(res[0].toUtf8())
         
-        if rtypes.is_valid_relation_name(name):
-            self.relations[name]=relation.relation(filename)
-            self.updateRelations()
-        else:
+        if not rtypes.is_valid_relation_name(name):
             QtGui.QMessageBox.information(self,QtGui.QApplication.translate("Form", "Error"),QtGui.QApplication.translate("Form", "Wrong name for destination relation: %s." % name))
+            return
+        
+        try:
+            self.relations[name]=relation.relation(filename)
+        except Exception, e:
+            print e
+            QtGui.QMessageBox.information(None,QtGui.QApplication.translate("Form", "Error"),"%s\n%s" % (QtGui.QApplication.translate("Form", "Check your query!"),e.__str__())  )
+            return
+            
+        
+        self.updateRelations()
 
     def insertTuple(self):
         '''Shows an input dialog and inserts the inserted tuple into the selected relation'''

relational_readline/linegui.py

@@ -24,6 +24,7 @@ import logging
 import os.path
 import os
 import sys
+import curses
 
 from relational import relation, parser, rtypes
 
@@ -261,6 +262,17 @@ def exec_query(command):
         print e
     
 def main(files=[]):
+    
+    import locale
+    locale.setlocale(locale.LC_ALL, '')
+    code = locale.getpreferredencoding()
+
+    print curses.can_change_color()
+    
+    curses.color_pair(curses.A_BOLD)
+    
+    
+    
     print "> ; Type HELP to get the HELP"
     print "> ; Completion is activated using the tab (if supported by the terminal)"
     
@@ -285,4 +297,5 @@ def main(files=[]):
 
 
 if __name__ == "__main__":
+    
     main()