I am using the Peewee library in Python and I want to check if a query exists. I do not want to create a record if it doesn't exist, so I don't want to use get_or_create. There must be a better solution than to use try/except with get but I don't see anything. Please let me know if there is a better way. Thanks.
You can use .exists()
:
query = User.select().where(User.username == 'charlie')
if query.exists():
# A user named "charlie" exists.
cool()
http://docs.peewee-orm.com/en/latest/peewee/api.html?highlight=exists#SelectBase.exists
If you just need to check existence use the accepted answer.
If you are going to use the record if it exists you can make use of Model.get_or_none() as this removes the need to use a try/catch and will not create a record if the record doesn't exist.
class User(peewee.Model):
username = peewee.CharField(unique=True)
user = User.get_or_none(username='charlie')
if user is not None:
# found user, do something with it
pass
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