Django error loaddata UNIQUE restriction

Question

I start python manage.py loaddata 'path/to/mydata.json'with an empty database ( Userand the UserProfiletables are created but not populated), however I get the following error:

django.db.utils.IntegrityError: Problem installing fixture 'path/to/mydata.json': Could not load myapp.UserProfile(pk=1): UNIQUE constraint failed: myapp_userprofile.user_id

I checked (even after running this command) and the database is not full at all. So, how could it be a mistake that pk is not unique?

If relevant, UserProfilesimply extends the default model Userwith a relation OneToOneField, as suggested here .

Here is what it mydata.jsoncontains:

[
    {
        "model": "auth.user",
        "pk": 1,
        "fields": {
            "password": "pbkdf2_sha256..",
            "last_login": "2016-10-22T15:19:46.926Z",
            "is_superuser": true,
            "username": "thesuperuser",
            "first_name": "",
            "last_name": "",
            "email": "[e-mail]",
            "is_staff": true,
            "is_active": true,
            "date_joined": "2016-10-22T14:48:27.394Z",
            "groups": [],
            "user_permissions": []
        }
    },
    {
        "model": "auth.user",
        "pk": 2,
        "fields": {
            "password": "pbkdf2_sha256..",
            "last_login": null,
            "is_superuser": false,
            "username": "user1",
            "first_name": "User",
            "last_name": "One",
            "email": "",
            "is_staff": false,
            "is_active": true,
            "date_joined": "2016-10-22T15:20:32Z",
            "groups": [],
            "user_permissions": []
        }
    },
    {
        "model": "auth.user",
        "pk": 4,
        "fields": {
            "password": "pbkdf2_sha256..",
            "last_login": null,
            "is_superuser": false,
            "username": "user3",
            "first_name": "User",
            "last_name": "Three",
            "email": "",
            "is_staff": false,
            "is_active": true,
            "date_joined": "2016-10-22T15:21:09Z",
            "groups": [],
            "user_permissions": []
        }
    },
    {
        "model": "auth.user",
        "pk": 3,
        "fields": {
            "password": "pbkdf2_sha256..",
            "last_login": null,
            "is_superuser": false,
            "username": "user2",
            "first_name": "User",
            "last_name": "Two",
            "email": "",
            "is_staff": false,
            "is_active": true,
            "date_joined": "2016-10-22T15:21:03Z",
            "groups": [],
            "user_permissions": []
        }
    },
    {
        "model": "myapp.userprofile",
        "pk": 1,
        "fields": {
            "user": 1,
            "money": 100
        }
    },
    {
        "model": "myapp.userprofile",
        "pk": 2,
        "fields": {
            "user": 2,
            "money": 100
        }
    },
    {
        "model": "myapp.userprofile",
        "pk": 3,
        "fields": {
            "user": 3,
            "money": 100
        }
    },
    {
        "model": "myapp.userprofile",
        "pk": 4,
        "fields": {
            "user": 4,
            "money": 100
        }
    }
]

Thanks for any help

Answer 1

I had a similar problem. Inspired by this post:

https://github.com/yourlabs/django-cities-light/issues/89 (. " " )

loaddata " ", .