Django - How can i modify text before save them to database?

Question

I want to input something like(via the admin page):

text = 't(es)t'

and save them as:

'test'

on database.

And I use this Regex to modify them:

re.sub(r'(.*)\({1}(.*)\){1}(.*)', r'\1\2\3', text)

I know how to transform text from 't(es)t' to 'test' but the problem is

when i use

name = models.CharField(primary_key=True, max_length=16)

to input text(from admin). It immediately save to database cannot modify it before saving.

Finally, From a single input from admin text = 't(es)t' (CharField).

What do i want?

1. To use 't(es)t' as a string variable.
2. Save 'test' to database

Answer 1

Try to overide the save method in your model,

class Model(model.Model):
    name = models.CharField(primary_key=True, max_length=16)

    # This should touch before saving
    def save(self, *args, **kwargs):
        self.name = re.sub(r'(.*)\({1}(.*)\){1}(.*)', r'\1\2\3', self.name)
        super(Model, self).save(*args, **kwargs)

Update:

class Model(model.Model):
        name = models.CharField(primary_key=True, max_length=16)
        name_org = models.CharField(max_length=16)

        # This should touch before saving
        def save(self, *args, **kwargs):
            self.name = re.sub(r'(.*)\({1}(.*)\){1}(.*)', r'\1\2\3', self.name)
            self.name_org = self.name # original "t(es)t"
            super(Model, self).save(*args, **kwargs)