TextField

[אורי‎]

Django users,

Is there a default max length for TextField which is enforced in the database? We are using PostgreSQL and I don't want users (hackers) to flood our database with megabytes of meaningless text.

Thanks,

Uri.

אורי

u...@speedy.net

[Mike Dewhirst]

On 6/01/2020 2:24 pm, אורי wrote:
> Django users,
>
> Is there a default max length for TextField which is enforced in the
> database? We are using PostgreSQL and I don't want users (hackers) to
> flood our database with megabytes of meaningless text.

Uri

In your model create a clean() method. If it exists [1] this is called
by django forms prior to a save. If you access the field via an API or
unit tests you have to call it specifically. In there you can test for a
maximum size - or anything else really.

class SomeModel(models.Model):

    long_text = models.TextField()

    def clean(self):
        txt = self.long_text or ""
        if len(txt) > 100000000:
            # this needs to be reported to the user because it will
prevent saving
            # happens automatically in the Admin ...
            raise ValidationError("Too much meaningless text")


[1]
https://docs.djangoproject.com/en/2.2/topics/forms/modelforms/#overriding-the-clean-method

Cheers

Mike


>
> Thanks,
> Uri.
> אורי
> u...@speedy.net <mailto:u...@speedy.net>
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[Abu Yusuf]

No, there is no limit for textfield. But you can do the hack using this:

from django.core.validators import MaxLengthValidator

class Comment(models.Model):
    comment = models.TextField(validators=[MaxLengthValidator(200)])

[Abu Yusuf]

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[אורי‎]

It's better to add a validator in the model:

text = models.TextField(verbose_name=_('your message'), max_length=50000, validators=[MaxLengthValidator(limit_value=50000)])

אורי

u...@speedy.net

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[אורי‎]

Sorry, I didn't see that you already wrote that.

אורי

u...@speedy.net

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