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You run alembic upgrade head but get an error about missing dependencies in your migration script. What is the best way to fix this?

medium📝 Debug Q14 of 15
FastAPI - Database Integration
You run alembic upgrade head but get an error about missing dependencies in your migration script. What is the best way to fix this?
AEdit the migration script to add missing imports or fix syntax errors
BDelete all migration scripts and start over
CRun <code>alembic downgrade base</code> without fixing scripts
DIgnore the error and rerun the command
Step-by-Step Solution
Solution:

  1. Step 1: Identify cause of error

    Missing dependencies or syntax errors in migration scripts cause upgrade failures.

  2. Step 2: Fix the migration script

    Editing the script to add missing imports or correct syntax resolves the error and allows upgrade to succeed.

  3. Final Answer:

    Edit the migration script to add missing imports or fix syntax errors -> Option A

  4. Quick Check:

    Fix script errors before upgrading [OK]
Quick Trick: Fix migration script errors before upgrading [OK]
Common Mistakes:
MISTAKES
  • Deleting scripts unnecessarily
  • Ignoring errors and retrying blindly
  • Downgrading without fixing root cause

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