What's wrong with this model

[Saeed Pooladzadeh]

Hello

I made this model and think everything is fine:

class Smodel(models.Model):

    eid=models.AutoField(primary_key=True)

   # eid=models.IntegerField(default=0)

    elogin = models.CharField(max_length=8) 

    epassword= models.CharField(max_length=8) 

  

    elikeDay=models.IntegerField(default=0)

    efollowPerDay=models.IntegerField(default=0)

    

   

    #esession = models.TextField()

    class Meta:  

        db_table = "saeed"  

  'But when I try to 'make migration 

I get this error:

You are trying to add a non-nullable field 'elogin' to smodel without a default; we can't do that (the database needs something to populate existing rows).

Please select a fix:

 1) Provide a one-off default now (will be set on all existing rows with a null value for this column)

 2) Quit, and let me add a default in models.py

Select an option: 

What is wrong with this model and how can I resolve it?

regards,

Saeed 

[Gil Obradors]

Yes, your are adding new field elogin.

Table contains data

You must specify a default on all existing rows, selecting 1 and writing to console something

Missatge de Saeed Pooladzadeh <ling...@gmail.com> del dia dl., 27 de maig 2019 a les 23:52:

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[Chandrashekhar Singh]

You have to add null= true to each model field since database needs default value

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[Balaji Shetty]

Hi

You may change elogin column syntax and provide default="Some_Value" .This may work.

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[Joe Reitman]

By default CharField is not Nullable meaning it can't be created with out some data in it. 

You have two options:

Make field nullable:  blank=True

Or add a default: default=default_text