3.4 Bag Validator

The basic ideas of Bag validator is to make a control of the data which can be inserted as value of a node. This mean that you can set a function of validation for a Bag node with two different sintaxes: as attributes or with the use of the Bag method addValidator().

3.4.1 - Examples

Setting with a node attribute:

# using the prefix validate_ followed by the type of validation.
myform.setItem('list.user.name','',validate_case='capitalize')


# now when you overwrite the value at the path 'list.user.name' the Bag does the control

myform['list.user.name'] = 'John Smith'

Setting using the setValidator method:

# using the prefix validate_ followed by the type of validation. The value of the attribute is the parameter of that validtation
myform.setItem('list.user.name',None,validate_case='capitalize')


# now set the validator with the Bag method addValidator(self, path, validator, parameterString))

myform = Bag()

myform.addValidator('list.user.name','case','capitalize' )

# now when you overwrite the value at the path 'list.user.name' the Bag does the control

myform['list.user.name'] = 'John Smith'

There is also the method removeValidator(self, path, validator) that remove the validator set into the path

3.4.2 - validator function

Actually you can set this validation:

• validate_case: the parameter string can be 'upper', 'lower', 'capitalize'

• validate_inList: the parameter string is a list of the values accepted eg: 'value1,value2,value3'

• validate_length: the parameter string is the min and the max number of char accepted for the value: eg '2,4'

• validate_hostaddr: no parameters