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You want to rename a column using Alembic migrations. Which approach is correct?

hard🚀 Application Q8 of 15
FastAPI - Database Integration
You want to rename a column using Alembic migrations. Which approach is correct?
AUse op.alter_column with new_column_name parameter inside migration script
BDelete the old column and add a new column with the new name
CRename the column directly in the database without migration
DModify the model and run alembic upgrade head without revision
Step-by-Step Solution
Solution:

  1. Step 1: Understand column rename in Alembic

    Renaming requires a specific operation in migration scripts using op.alter_column.

  2. Step 2: Correct usage of op.alter_column

    op.alter_column supports a new_column_name argument to rename columns safely.

  3. Final Answer:

    Use op.alter_column with new_column_name parameter inside migration script -> Option A

  4. Quick Check:

    Rename column = op.alter_column with new_column_name [OK]
Quick Trick: Rename columns with op.alter_column(new_column_name=...) [OK]
Common Mistakes:
MISTAKES
  • Dropping and adding columns loses data
  • Renaming directly in DB breaks migration history
  • Skipping revision after model changes

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