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Peewee 3 Enum Field Postgres
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from peewee import * | |
database = PostgresqlDatabase( | |
'my_database', | |
**{'user': 'postgres', 'password': 'postgres', 'host': 'localhost', 'port': 5432, 'autorollback': True} | |
) | |
class BaseModel(Model): | |
class Meta: | |
database = database | |
@classmethod | |
def create_table(cls, *args, **kwargs): | |
for field in cls._meta.fields.values(): | |
if hasattr(field, "pre_field_create"): | |
field.pre_field_create(cls) | |
cls._schema.create_table() | |
class EnumField(Field): | |
def pre_field_create(self, model): | |
field = "e_%s" % self.name | |
self.model._meta.database.execute_sql( | |
"DROP TABLE IF EXISTS %s;" % self.model._meta.table_name | |
) | |
self.model._meta.database.execute_sql( | |
"DROP TYPE IF EXISTS %s;" % field | |
) | |
tail = ', '.join(["'%s'"] * len(self.choices)) % tuple(self.choices) | |
q = "CREATE TYPE %s AS ENUM (%s);" % (field, tail) | |
self.model._meta.database.execute_sql(q) | |
self.field_type = "e_%s" % self.name | |
class MyTable(BaseModel): | |
type = EnumField(choices=['one', 'two', 'three']) | |
class Meta: | |
table_name = 'my_table' | |
database.connect() | |
database.create_tables([MyTable]) | |
MyTable.create(type='two') | |
MyTable.get(id=1).type #two | |
database.close() |
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