# Notice that the name of the image field has to be repeated in each constraint
# and the query object has to be passed in to access the "upload" routine, although
# this is potentially already accessible through D::FV.
constraints => {
	image_name => [
	{
		constraint => 'file_format',
		params => [\'image_name',$q],
	},
	{
		constraint => 'file_max_bytes',
		params => [\'image_name',$q,\100],
	},
	{
		constraint => 'image_max_dimensions',
		params => [\'image_name',$q,\200,\200],
	},

	],
}


# A possible solution: Something that looks like "param"
# but has access to the field name and the D::Fv object.
constraints => {
	image_name => [
	{
		constraint => 'file_format',
		oo_params  => [],
	},
	{
		constraint => 'file_max_bytes',
		oo_params => [\100],
	},
	{
		constraint => 'image_max_dimensions',
		oo_params => [\200,\200],
	},

	],
}