CODEWITHSUNDEEP
pythondjangopostgresql
Graham Slick
Graham Slick

Reputation: 6870

Django 1.10.5: relation 'myapp_mymodel' does not exist even after migrating

I have a django app "myapp" with this in model.py:

And in the same folder, I have a migrations folder with an empty __init__.py and 2 files:

from django.db import models
from django.contrib.postgres.fields import ArrayField

class Characteristic(models.Model):
    name = models.CharField(max_length=200)
    core = models.BooleanField(default=False)
    synonyms  =  ArrayField(
        models.CharField(max_length=200, blank=True),
        size=20
        )

0001_initial.py:

from __future__ import unicode_literals

import django.contrib.postgres.fields
from django.db import migrations, models


class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='characteristics',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('name', models.CharField(max_length=200)),
                ('synonyms', django.contrib.postgres.fields.ArrayField(base_field=models.CharField(blank=True, max_length=200), size=20)),
            ],
        ),
    ]

Second file:

from __future__ import unicode_literals

from django.db import migrations, models


class Migration(migrations.Migration):

    dependencies = [
        ('myapp', '0001_initial'),
    ]

    operations = [
        migrations.AddField(
            model_name='characteristics',
            name='core',
            field=models.BooleanField(default=False),
        ),
    ]

However, in a view, when trying to create an instance of the model:

characteristic = Characteristic(name=attribute.decode('utf-8'), synonyms=[])
characteristic.save()

I get an error:

ProgrammingError: relation "myapp_characteristic" does not exist

I did do: python manage.py makemigrations myapp and I have at the top of the file from myapp.models import Characteristic

Does anyone know where I'm wrong ?

Upvotes: 0

Views: 95

Answers (1)

SHIVAM JINDAL
SHIVAM JINDAL

Reputation: 2984

Makemigrations command just creates migrations for the changes in the database. It does perform any type of modification in DB.

python manage.py migrate

above command does the actual modification in the database and create an entry in migration table. so that Django can understand which migrations are actually migrated

Upvotes: 1

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