migration.py :  » Wiki » Cloud-Wiki » cloudwiki-2.1 » cloud_wiki » Python Open Source

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Python Open Source » Wiki » Cloud Wiki 
Cloud Wiki » cloudwiki 2.1 » cloud_wiki » migration.py
def major_1_to_2( database ):
  print "  Creating CloudSessions table.."
  
  database.transact(
        "CREATE TABLE CloudSessions( token, username, touched );",
        "CREATE UNIQUE INDEX CloudSessions_token ON CloudSessions( token );",
        "CREATE UNIQUE INDEX CloudSessions_username ON CloudSessions( username );"
  )

  if database.getConfig( "site-auth" ) == "cloud":
    print "  Migrating from Cloud authentication to MD5 authentication.."
    
    from md5 import md5

    database.setConfig( "site-auth", "md5" )
    
    transactions = []

    for username, password in database.query(
      "SELECT username, password FROM CloudAuth;"
    ):
      transactions.append((
        "UPDATE CloudAuth SET password = %s WHERE username == %s;",
        md5( password ).hexdigest(), username
      ))
  
    database.transact( *transactions )
  else:
    return

def update_version( database, svMajor, svMinor ):
  database.setConfig( "major-version", svMajor )
  database.setConfig( "minor-version", svMinor )

def minor_migration( database ):
  print "  Clearing all cached content html.."
  
  database.transact( "DELETE FROM CloudHtml;" )

def migrate_database( database, svMajor, svMinor ):
  dbMajor, dbMinor = database.getVersion()
  
  print "Migrating from %s.%s to %s.%s.." % ( dbMajor, dbMinor, svMajor, svMinor )

  if dbMajor == 1:
    major_1_to_2( database )
    minor_migration( database )
    update_version( database, svMajor, svMinor )    
  elif dbMajor == 2:
    if dbMinor != svMinor:
      minor_migration( database )
      update_version( database, svMajor, svMinor )
  else:
    print "  Failed -- Cloud Wiki cannot migrate a server from a newer major version to an older one."
  
  print "Done."
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