Re: Multi-field validation functions for Deform *child* schemas

[sirdavidoff]

I think I've found the solution - the key is to make sure you specify a position when you add the child exception to the parent one. This may only be a deform_bootstrap issue - I haven't done enough digging to be sure.

def main_schema_validator(form, value):

    subnode = child_named('sub_node', form)

    try:

       sub_schema_validator(subnode, value['sub_node'])

    except colander.Invalid, e:

       exc = colander.Invalid(form)

       # NB: You NEED the 0 argument here, or the error won't display

       # May be a deform_bootstrap problem

       exc.add(e, 0)

       raise exc

Hope that helps someone.

On Tuesday, July 10, 2012 6:27:28 PM UTC+2, sirdavidoff wrote:

Basically I'm struggling to add a multi-field validation error generated by on a child schema to the parent schema. Here goes...

I have a schema which includes a subschema:

class SubSchema(Colander.Schema):

   url = colander.SchemaNode(...)

   description = colander.SchemaNode(...)

class MainSchema(Colander.Schema):

   sub_node = SubSchema()

   ...

I also have a validation function that checks that at least one of 'url' and 'description' is non-null:

def sub_schema_validator(form, value):

   if not value['url'] and not value['description']:

      exc = colander.Invalid(form, 'Must enter either a website or a description')

      exc['url'] = ''

      exc['description'] = 'Please enter either a website or a description'

      raise exc

This function works fine if I just use the sub-schema (no main schema). For the main schema, I've tried to write a function that calls the sub-schema validation function:

def main_schema_validator(form, value):

    subnode = child_named('sub_node', form)

    sub_schema_validator(subnode, value['sub_node'])

The error gets raised, but the 'url' and 'description' fields don't get highlighted like they should be. I'm not sure how I'm supposed to add the exception generated by the sub-node to one for the main node.

Any ideas?