如何指定peewee TextField索引键的长度

Question

How can i set the key length for TextField with peewee python orm. I am on python3.7 and i get this error message:

peewee.InternalError: (1170, "BLOB/TEXT column 'text' used in key specification without a key length")

I tried specifying it like this:

text = TextField(unique = True, key_length = 255, index = True)

However that does not seem to work since it returns this:

TypeError: __init__() got an unexpected keyword argument 'key_length'

Answer 1

Try adding the index explicitly:

class Note(Model):
    content = TextField()
    class Meta:
        indexes = (
            SQL('create index note_content on note (content(100))'),
        )

Please note that specifying indexes on text fields in mysql is probably a bad idea. If you know the length ahead-of-time, probably better off just using a CharField() in that case.