def validate(value):
if value is None:
return
# The name is mandatory, but the 'mandatory' attribute support in
# wtypes.wsattr allows None.
if value.name is None:
err = _("Deploy template name cannot be None")
raise exception.InvalidDeployTemplate(err=err)
# The name must also be a valid trait.
api_utils.validate_trait(
value.name,
error_prefix=_("Deploy template name must be a valid trait"))
# There must be at least one step.
if not value.steps:
err = _("No deploy steps specified. A deploy template must have "
"at least one deploy step.")
raise exception.InvalidDeployTemplate(err=err)
# TODO(mgoddard): Determine the consequences of allowing duplicate
# steps.
# * What if one step has zero priority and another non-zero?
# * What if a step that is enabled by default is included in a
# template? Do we override the default or add a second invocation?
# Check for duplicate steps. Each interface/step combination can be
# specified at most once.
counter = collections.Counter(
(step.interface, step.step) for step in value.steps)
duplicates = {key for key, count in counter.items() if count > 1}
if duplicates:
duplicates = {
"interface: %s, step: %s" % (interface, step)
for interface, step in duplicates
}
err = _("Duplicate deploy steps. A deploy template cannot have "
"multiple deploy steps with the same interface and step. "
"Duplicates: %s") % "; ".join(duplicates)
raise exception.InvalidDeployTemplate(err=err)
return value
def duplicate_steps(name, value):
"""Argument validator to check template for duplicate steps"""
# TODO(mgoddard): Determine the consequences of allowing duplicate
# steps.
# * What if one step has zero priority and another non-zero?
# * What if a step that is enabled by default is included in a
# template? Do we override the default or add a second invocation?
# Check for duplicate steps. Each interface/step combination can be
# specified at most once.
counter = collections.Counter(
(step['interface'], step['step']) for step in value['steps'])
duplicates = {key for key, count in counter.items() if count > 1}
if duplicates:
duplicates = {
"interface: %s, step: %s" % (interface, step)
for interface, step in duplicates
}
err = _("Duplicate deploy steps. A deploy template cannot have "
"multiple deploy steps with the same interface and step. "
"Duplicates: %s") % "; ".join(duplicates)
raise exception.InvalidDeployTemplate(err=err)
return value