Possible to change schema at run time?

[owais]

I'm writing something like this,

class Vehicle(models.Model):
     kind = models.CharField(choices=('car', 'bike',))
     extra = hstore.DictionaryField(schema={...})

Is it possible to override the schema at run time so we can have different schema for cars and bikes? For example in the __init__ of the model?

[aidanlister]

You sure can, here's an example of a schema loaded at runtime where the schema is defined in the database:

@receiver(signals.post_init)
def update_schema(sender, **kwargs):
    # If we don't exclude these two, we get an infinite recursion
    if sender.__name__ in ['ExtraField', 'ContentType']:
        return

    try:
        field = sender._meta.get_field('extra_fields')
    except FieldDoesNotExist:
        field = None
    if not isinstance(field, hstore.DictionaryField):
        return

    schema = SCHEMA[sender]
    if schema:
        field.reload_schema(schema)

[nemesifier]

thanks @aidanlister for the response.

If anyone has other questions, please use the mailing list. Use this issue tracker for bug reports.

Thank you for your understanding

Best regards Federico