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from django.db import NotSupportedError
from django.db.models.expressions import Func
from django.db.models.fields import UUIDField
class UUID4(Func):
function = "UUIDV4"
arity = 0
output_field = UUIDField()
def as_sql(self, compiler, connection, **extra_context):
if connection.features.supports_uuid4_function:
return super().as_sql(compiler, connection, **extra_context)
raise NotSupportedError("UUID4 is not supported on this database backend.")
def as_postgresql(self, compiler, connection, **extra_context):
if connection.features.is_postgresql_18:
return self.as_sql(compiler, connection, **extra_context)
return self.as_sql(
compiler, connection, function="GEN_RANDOM_UUID", **extra_context
)
def as_mysql(self, compiler, connection, **extra_context):
if not connection.features.supports_uuid4_function:
if connection.mysql_is_mariadb:
raise NotSupportedError("UUID4 requires MariaDB version 11.7 or later.")
raise NotSupportedError("UUID4 is not supported on MySQL.")
return self.as_sql(compiler, connection, function="UUID_V4", **extra_context)
def as_oracle(self, compiler, connection, **extra_context):
if not connection.features.supports_uuid4_function:
raise NotSupportedError(
"UUID4 requires Oracle version 23ai/26ai (23.9) or later."
)
return self.as_sql(compiler, connection, function="UUID", **extra_context)
class UUID7(Func):
function = "UUIDV7"
arity = 1
output_field = UUIDField()
def __init__(self, shift=None, **extra):
super().__init__(shift, **extra)
def _parse_expressions(self, *expressions):
if expressions[0] is None:
expressions = expressions[1:]
return super()._parse_expressions(*expressions)
def as_sql(self, compiler, connection, **extra_context):
if not connection.features.supports_uuid7_function:
raise NotSupportedError("UUID7 is not supported on this database backend.")
if len(self.source_expressions) == 1:
if not connection.features.supports_uuid7_function_shift:
msg = (
"The shift argument to UUID7 is not supported "
"on this database backend."
)
raise NotSupportedError(msg)
return super().as_sql(compiler, connection, **extra_context)
def as_postgresql(self, compiler, connection, **extra_context):
if connection.features.supports_uuid7_function:
return self.as_sql(compiler, connection, **extra_context)
raise NotSupportedError("UUID7 requires PostgreSQL version 18 or later.")
# PY314: When dropping support for 3.14, remove the entire method.
def as_sqlite(self, compiler, connection, **extra_context):
if connection.features.supports_uuid7_function:
return self.as_sql(compiler, connection, **extra_context)
raise NotSupportedError(
"UUID7 on SQLite requires Python version 3.14 or later."
)
def as_mysql(self, compiler, connection, **extra_context):
if connection.features.supports_uuid7_function:
return self.as_sql(
compiler, connection, function="UUID_V7", **extra_context
)
if connection.mysql_is_mariadb:
raise NotSupportedError("UUID7 requires MariaDB version 11.7 or later.")
raise NotSupportedError("UUID7 is not supported on MySQL.")
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