python orm peewee错误

Question

I love using python orm peewee, but I getting this error again and again.

"InterfaceError: Error binding parameter 0 - probably unsupported type"

The most frustrating thing is that it does not shows always. It appears to act arbitrarily.

The code that causes the error is quite simple and as I said, sometimes works sometimes does not.

lista=Tareas.select().where((Tareas.ta_usuario==self.user.id) & (Tareas.done=="True"))
for tarea in lista:
     borrada=tarea.delete_instance()

Any clue about what can be causing the error?

The difinition of tareas is simple:

class Tareas(SqliteModel):
    task = CharField()
    done = CharField()
    ta_usuario = IntegerField()

Answer 1

This is issue #81 . The problem is that you are modifying the data while consuming the loop.

Try this:

lista = Tareas.select().where(
    (Tareas.ta_usuario==self.user.id) & (Tareas.done=="True")
)

lista_de_tareas = [i for i in lista]
for tarea in lista_de_tareas:
     borrada = tarea.delete_instance()

See the response to the GitHub issue for other solutions.