Django Table already exist

2019-06-28 01:07发布

问题:

Here is my Django Migration file. When I run

python manage.py makemigrations/migrate 

I get this error.

Error:-

    django.db.utils.OperationalError: (1050, "Table 'tickets_duration' already exists")

I have dropped the database and running it but still get the same error.

class Migration(migrations.Migration):

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='Duration',
            fields=[
                ('Id', models.UUIDField(primary_key=True, db_column=b'duration_id', default=uuid.uuid4, serialize=False, editable=False)),
                ('duration', models.CharField(max_length=200, db_column=b'duration')),
            ],
        ),
        migrations.CreateModel(
            name='ErrorCount',
            fields=[
                ('Id', models.UUIDField(primary_key=True, db_column=b'error_id', default=uuid.uuid4, serialize=False, editable=False)),
                ('error', models.CharField(max_length=200, db_column=b'error')),
            ],
        ),
        migrations.CreateModel(
            name='OutageCaused',
            fields=[
                ('Id', models.UUIDField(primary_key=True, db_column=b'error_id', default=uuid.uuid4, serialize=False, editable=False)),
                ('outage_caused', models.CharField(max_length=200, db_column=b'outage_caused')),
            ],
        ),
        migrations.CreateModel(
            name='Pg',
            fields=[
                ('Id', models.UUIDField(primary_key=True, db_column=b'pg_id', default=uuid.uuid4, serialize=False, editable=False)),
                ('pg_cd', models.CharField(max_length=200, db_column=b'pg_cd')),
            ],
        ),
        migrations.CreateModel(
            name='SystemCaused',
            fields=[
                ('Id', models.UUIDField(primary_key=True, db_column=b'error_id', default=uuid.uuid4, serialize=False, editable=False)),
                ('system_caused', models.CharField(max_length=200, db_column=b'system_caused')),
            ],
        ),
        migrations.CreateModel(
            name='Tickets',
            fields=[
                ('ticket_num', models.CharField(max_length=100, serialize=False, primary_key=True, db_column=b'ticket_id')),
                ('created_dt', models.DateTimeField(db_column=b'created_dt')),
                ('ticket_type', models.CharField(max_length=20, db_column=b'ticket_type')),
                ('addt_notes', models.CharField(max_length=1000, db_column=b'addt_notes')),
                ('row_create_ts', models.DateTimeField(default=datetime.datetime(2016, 2, 29, 16, 58, 31, 584733))),
                ('row_end_ts', models.DateTimeField(default=b'9999-12-31 00:00:00.00000-00', db_column=b'row_end_ts')),
                ('duration', models.ManyToManyField(to='tickets.Duration')),
                ('error_count', models.ManyToManyField(to='tickets.ErrorCount')),
                ('outage_caused', models.ManyToManyField(to='tickets.OutageCaused')),

回答1:

try python manage.py migrate your_app --fake. This post talks about it. Django South - table already exists.



回答2:

temporary solution may be to comment the creation of existing table(tickets_duration).

class Migration(migrations.Migration):

    dependencies = [
    ]

    operations = [
        #migrations.CreateModel(
        #    name='Duration',
        #    fields=[
        #        ('Id', models.UUIDField(primary_key=True, db_column=b'duration_id', default=uuid.uuid4, serialize=False, editable=False)),
        #        ('duration', models.CharField(max_length=200, db_column=b'duration')),
        #    ],
        #),
        ....
        ....


回答3:

This question is already answered here

You should run this:

python manage.py migrate <appname> --fake



回答4:

python manage.py migrate --fake-initial should work for django 2.2