def _value_for_db(self, value, field, field_kind, db_type, lookup):
"""
GAE database may store a restricted set of Python types, for
some cases it has its own types like Key, Text or Blob.
TODO: Consider moving empty list handling here (from insert).
"""
# Store Nones as Nones to handle nullable fields, even keys.
if value is None:
return None
# Parent can handle iterable fields and Django wrappers.
value = super(DatabaseOperations, self)._value_for_db(
value, field, field_kind, db_type, lookup)
# Convert decimals to strings preserving order.
if field_kind == 'DecimalField':
value = decimal_to_string(
value, field.max_digits, field.decimal_places)
# Create GAE db.Keys from Django keys.
# We use model's table name as key kind (the table of the model
# of the instance that the key identifies, for ForeignKeys and
# other relations).
if db_type == 'key':
# value = self._value_for_db_key(value, field_kind)
if isinstance(value, str) and len(value) > 500:
warnings.warn(u"GAE string key '%s' exceeded maximum_length of 500 and was truncated." % value,
RuntimeWarning)
value = value[:500]
try:
if not isinstance(value, (Key, AncestorKey)):
value = key_from_path(field.model._meta.db_table, value)
except (BadArgumentError, BadValueError,):
raise DatabaseError("Only strings and positive integers "
"may be used as keys on GAE.")
# Store all strings as unicode, use db.Text for longer content.
elif db_type == 'string' or db_type == 'text':
if isinstance(value, str):
value = value.decode('utf-8')
if db_type == 'text':
value = Text(value)
# Store all date / time values as datetimes, by using some
# default time or date.
elif db_type == 'date':
value = datetime.datetime.combine(value, self.DEFAULT_TIME)
elif db_type == 'time':
value = datetime.datetime.combine(self.DEFAULT_DATE, value)
# Store BlobField, DictField and EmbeddedModelField values as Blobs.
elif db_type == 'bytes':
value = Blob(value)
return value
def _value_for_db(self, value, field, field_kind, db_type, lookup):
"""
GAE database may store a restricted set of Python types, for
some cases it has its own types like Key, Text or Blob.
TODO: Consider moving empty list handling here (from insert).
"""
# Store Nones as Nones to handle nullable fields, even keys.
if value is None:
return None
# Parent can handle iterable fields and Django wrappers.
value = super(DatabaseOperations,
self)._value_for_db(value, field, field_kind, db_type,
lookup)
# Convert decimals to strings preserving order.
if field_kind == 'DecimalField':
value = decimal_to_string(value, field.max_digits,
field.decimal_places)
# Create GAE db.Keys from Django keys.
# We use model's table name as key kind (the table of the model
# of the instance that the key identifies, for ForeignKeys and
# other relations).
if db_type == 'key':
# value = self._value_for_db_key(value, field_kind)
try:
value = key_from_path(field.model._meta.db_table, value)
except (
BadArgumentError,
BadValueError,
):
raise DatabaseError("Only strings and positive integers "
"may be used as keys on GAE.")
# Store all strings as unicode, use db.Text for longer content.
elif db_type == 'string' or db_type == 'text':
if isinstance(value, str):
value = value.decode('utf-8')
if db_type == 'text':
value = Text(value)
# Store all date / time values as datetimes, by using some
# default time or date.
elif db_type == 'date':
value = datetime.datetime.combine(value, self.DEFAULT_TIME)
elif db_type == 'time':
value = datetime.datetime.combine(self.DEFAULT_DATE, value)
# Store BlobField, DictField and EmbeddedModelField values as Blobs.
elif db_type == 'bytes':
value = Blob(value)
return value
def _value_for_db(self, value, field, field_kind, db_type, lookup):
"""
Allows parent to handle nonrel fields, convert AutoField
keys to ObjectIds and date and times to datetimes.
Let everything else pass to PyMongo -- when the value is used
the driver will raise an exception if it got anything
unacceptable.
"""
if value is None:
return None
# Parent can handle iterable fields and Django wrappers.
value = super(DatabaseOperations,
self)._value_for_db(value, field, field_kind, db_type,
lookup)
# Convert decimals to strings preserving order.
if field_kind == 'DecimalField':
value = decimal_to_string(value, field.max_digits,
field.decimal_places)
# Anything with the "key" db_type is converted to an ObjectId.
if db_type == 'key':
try:
return ObjectId(value)
# Provide a better message for invalid IDs.
except InvalidId:
assert isinstance(value, unicode)
if len(value) > 13:
value = value[:10] + '...'
msg = "AutoField (default primary key) values must be " \
"strings representing an ObjectId on MongoDB (got " \
"%r instead)." % value
if field.model._meta.db_table == 'django_site':
# Also provide some useful tips for (very common) issues
# with settings.SITE_ID.
msg += " Please make sure your SITE_ID contains a " \
"valid ObjectId string."
raise DatabaseError(msg)
# PyMongo can only process datatimes?
elif db_type == 'date':
return datetime.datetime(value.year, value.month, value.day)
elif db_type == 'time':
return datetime.datetime(1, 1, 1, value.hour, value.minute,
value.second, value.microsecond)
return value
def _value_for_db(self, value, field, field_kind, db_type, lookup):
"""
Allows parent to handle nonrel fields, convert AutoField
keys to ObjectIds and date and times to datetimes.
Let everything else pass to PyMongo -- when the value is used
the driver will raise an exception if it got anything
unacceptable.
"""
if value is None:
return None
# Parent can handle iterable fields and Django wrappers.
value = super(DatabaseOperations, self)._value_for_db(
value, field, field_kind, db_type, lookup)
# Convert decimals to strings preserving order.
if field_kind == 'DecimalField':
value = decimal_to_string(
value, field.max_digits, field.decimal_places)
# Anything with the "key" db_type is converted to an ObjectId.
if db_type == 'key':
try:
return ObjectId(value)
# Provide a better message for invalid IDs.
except InvalidId:
assert isinstance(value, (str, unicode))
if len(value) > 13:
value = value[:10] + '...'
msg = "AutoField (default primary key) values must be " \
"strings representing an ObjectId on MongoDB (got " \
"%r instead)." % value
if field.model._meta.db_table == 'django_site':
# Also provide some useful tips for (very common) issues
# with settings.SITE_ID.
msg += " Please make sure your SITE_ID contains a " \
"valid ObjectId string."
raise DatabaseError(msg)
# PyMongo can only process datatimes?
elif db_type == 'date':
return datetime.datetime(value.year, value.month, value.day)
elif db_type == 'time':
return datetime.datetime(1, 1, 1, value.hour, value.minute,
value.second, value.microsecond)
return value
