Error at OneToOneField in models while creating new models class

[Srinivas Gadi]

HI All,

I am facing below error while creating a new model class.

the error pop up only at this line "user = models.OneToOneField(User)"

"E1120:No value for argument 'on_delete' in constructor call"

from django.db import models

from django.contrib.auth.models import User

class userProfile(models.Model):

user = models.OneToOneField(User)

If I add "user = models.OneToOneField(User,on_delete=models.CASCADE)" the error got subsided but the new class "userProfile" is not appearing in admin page, under Users tab.

Could some one please guide me how to fix this ?

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Srinivas .G
      9966559383

[Srinivas Gadi]

Adding more and complete details:

I am facing below error while creating a new model class.

the error pops up only at this line "user = models.OneToOneField(User)"

"E1120:No value for argument 'on_delete' in constructor call"

section/models.py

from django.db import models
from django.contrib.auth.models import User

class userProfile(models.Model):
    user = models.OneToOneField(User)

admin.py

from django.contrib import admin
from section.models import userProfile

admin.site.register(userProfile)

If I add below entry with "on_delete=models.CASCADE"

user = models.OneToOneField(User,on_delete=models.CASCADE)

the error got subsided but the new class "userProfile" is not appearing in admin page, under Users tab.

Also, run migrations:

C:\Users\srini\djangoProjects\college>python manage.py makemigrations
No changes detected

C:\Users\srini\djangoProjects\college>python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
No migrations to apply.

Could someone please guide me how to fix this?

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Srinivas .G
      9966559383

[Matthew Pava]

Did you try running your migrations?

Get Outlook for Android

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[Srinivas Gadi]

Yes, provided the migrations out put in the second mail

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[Adolfo Cueto]

First you have to change your model name Class names starts with uppercase...

My friend.. you are not making migrations... look at you have to do this:

1. Delete your migration folder

2. Delete you app table manually (DROP table)

3. python manage.py makemigrations app_name

4. migrate

that's all

[Srinivas Gadi]

Thank you for the response,

1. Deleted the migrations folder

2. Removed the SQLite3 DB itself

3. My dir structure.

24-09-2018  16:37    <DIR>          .

24-09-2018  16:37    <DIR>          ..

23-09-2018  15:06    <DIR>          college

19-09-2018  08:56               554 manage.py

19-09-2018  10:59    <DIR>          section

               1 File(s)            554 bytes

               4 Dir(s)  32,464,281,600 bytes free

4. Execute the makemigrations, but it prompting with the error. 

C:\Users\srini\djangoProjects\college>python manage.py makemigrations section

App 'section' could not be found. Is it in INSTALLED_APPS?

5. FYI: Also registered in apps.py

from django.apps import AppConfig

class ClassConfig(AppConfig):

name = 'section'

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Srinivas .G
      9966559383

[luca bocchi]

seems that your app is not in settings.INSTALLED_APPS, add 'section' there and retry.

L

[Srinivas Gadi]

It was fixed by adding the "section.apps.Class.Config" in settings INSTALLED_APPS

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Srinivas .G
      9966559383