old web2py blog

From Fran. validators for LATITUDE and LONGITUDE

class IS_LAT(object):
  """
  example:

  INPUT(_type='text',_name='name',requires=IS_LAT())

  latitude has to be in degrees between -90 & 90
  """
  def __init__(self, error_message='Latitude/Northing should be between -90 & 90!'):
    self.minimum=-90
    self.maximum=90
    self.error_message = error_message
  def __call__(self, value):
    try:
        value = float(value)
        if self.minimum <= value <= self.maximum: return (value,None)
    except ValueError: pass
    return (value, self.error_message)

class IS_LON(object):
  """
  example:

  INPUT(_type='text',_name='name',requires=IS_LON())

  longitude has to be in degrees between -180 & 180
  """
  def __init__(self, error_message='Longitude/Easting should be between -180 & 180!'):
    self.minimum=-180
    self.maximum=180
    self.error_message = error_message
  def __call__(self, value):
    try:
        value = float(value)
        if self.minimum <= value <= self.maximum: return (value,None)
    except ValueError: pass
    return (value, self.error_message)