def get_form(self, variation, data=None) -> ItemVariationForm:
"""
Return the dict for one given variation. Variations are expected to be
dictionaries in the format of Item.get_all_variations()
"""
# Values are all dictionary ite
values = [
i[1] for i in sorted(
[it for it in variation.items() if it[0] != 'variation'])
]
if 'variation' in variation:
form = ItemVariationForm(
data,
instance=variation['variation'],
prefix=",".join([str(i.identity) for i in values]),
)
else:
inst = ItemVariation(item=self.object)
inst.item_id = self.object.identity
inst.creation = True
form = ItemVariationForm(
data,
instance=inst,
prefix=",".join([str(i.identity) for i in values]),
)
form.values = values
return form
def _clean_value(self, value):
# Build up a cache of variations having an ItemVariation object
# For implementation details, see ItemVariation.get_all_variations()
# which uses a very similar method
all_variations = self.item.variations.all().prefetch_related("values")
variations_cache = {
var.to_variation_dict().identify(): var.identity
for var in all_variations
}
cleaned_value = []
# Wrap this in a transaction to prevent strange database state if we
# get a ValidationError half-way through
with transaction.atomic():
for pk in value:
if ":" in pk:
# A combination of PropertyValues was given
# Hash the combination in the same way as in our cache above
key = ",".join(
[pair.split(":")[1] for pair in sorted(pk.split(","))])
if key in variations_cache:
# An ItemVariation object already exists for this variation,
# so use this. (This might occur if the variation object was
# created _after_ the user loaded the form but _before_ he
# submitted it.)
cleaned_value.append(str(variations_cache[key]))
continue
# No ItemVariation present, create one!
var = ItemVariation()
var.item_id = self.item.identity
var.save()
# Add the values to the ItemVariation object
try:
var.add_values_from_string(pk)
except:
raise ValidationError(
self.error_messages['invalid_pk_value'],
code='invalid_pk_value',
params={'pk': value},
)
variations_cache[key] = var.identity
cleaned_value.append(str(var.identity))
else:
# An ItemVariation id was given
cleaned_value.append(pk)
return cleaned_value
def _clean_value(self, value):
# Build up a cache of variations having an ItemVariation object
# For implementation details, see ItemVariation.get_all_variations()
# which uses a very similar method
all_variations = self.item.variations.all().prefetch_related("values")
variations_cache = {
var.to_variation_dict().identify(): var.identity for var in all_variations
}
cleaned_value = []
# Wrap this in a transaction to prevent strange database state if we
# get a ValidationError half-way through
with transaction.atomic():
for pk in value:
if ":" in pk:
# A combination of PropertyValues was given
# Hash the combination in the same way as in our cache above
key = ",".join([pair.split(":")[1] for pair in sorted(pk.split(","))])
if key in variations_cache:
# An ItemVariation object already exists for this variation,
# so use this. (This might occur if the variation object was
# created _after_ the user loaded the form but _before_ he
# submitted it.)
cleaned_value.append(str(variations_cache[key]))
continue
# No ItemVariation present, create one!
var = ItemVariation()
var.item_id = self.item.identity
var.save()
# Add the values to the ItemVariation object
try:
var.add_values_from_string(pk)
except:
raise ValidationError(
self.error_messages['invalid_pk_value'],
code='invalid_pk_value',
params={'pk': value},
)
variations_cache[key] = var.identity
cleaned_value.append(str(var.identity))
else:
# An ItemVariation id was given
cleaned_value.append(pk)
return cleaned_value
def get_form(self, variation, data=None) -> ItemVariationForm:
"""
Return the dict for one given variation. Variations are expected to be
dictionaries in the format of Item.get_all_variations()
"""
# Values are all dictionary ite
values = [i[1] for i in sorted([it for it in variation.items() if it[0] != 'variation'])]
if 'variation' in variation:
form = ItemVariationForm(
data,
instance=variation['variation'],
prefix=",".join([str(i.identity) for i in values]),
)
else:
inst = ItemVariation(item=self.object)
inst.item_id = self.object.identity
inst.creation = True
form = ItemVariationForm(
data,
instance=inst,
prefix=",".join([str(i.identity) for i in values]),
)
form.values = values
return form