如何修復 Django 中的「表不存在」錯誤？

Django: Resolving "Table Doesn't Exist" Error

This error occurs when Django attempts to perform database operations on a table that no longer exists, typically due to a manual deletion or a change in the application's models.

Problem Explanation:

After dropping the model-related table, the syncdb command tries to create the table again. However, since the model for the table is still present in models.py, Django expects the table to be there but finds it missing. This results in the "Table doesn't exist" error.

Solution Steps:

1. Drop tables (You've already done this).
2. Comment out the model in models.py.

3. Execute migrations (For Django versions >= 1.7):

   • python manage.py makemigrations
   • python manage.py migrate --fake

   OR

   Execute schema migration (For Django versions < 1.7):

   • python manage.py schemamigration someapp --auto
   • python manage.py migrate someapp --fake
4. Comment in the model in models.py.
5. Re-execute migrations or schema migration (this time without --fake).

Example for Django versions >= 1.7:

# Comment out the model in models.py
# class feed(models.Model):
    # ...

# Execute migrations
python manage.py makemigrations
python manage.py migrate

# Comment in the model in models.py
# class feed(models.Model):
    # ...

# Re-execute migrations
python manage.py migrate

Example for Django versions < 1.7:

# Comment out the model in models.py
# class feed(models.Model):
    # ...

# Execute schema migration
python manage.py schemamigration someapp --auto
python manage.py migrate someapp --fake

# Comment in the model in models.py
# class feed(models.Model):
    # ...

# Re-execute schema migration
python manage.py migrate someapp

By following these steps, you can recreate the missing tables and resolve the "Table doesn't exist" error.

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