Adding Columns and Modifying Tables
Database schemas rarely stay fixed for long — new features usually mean new columns, changed data types, or renamed fields. Laravel handles these changes the same way it handles initial table creation: through migrations.
Modifying an Existing Table
Rather than editing the original migration that created a table, changes to an existing table are made through a new migration that targets it. This keeps the full history of schema changes intact and avoids breaking environments that already ran the original migration.
Common Table Modifications
| Change | Typical Approach |
|---|---|
| Add a column | A new migration using Schema::table() and $table->string(...) |
| Rename a column | A migration using $table->renameColumn(...) |
| Change a column's type | A migration using ->change() on the column definition |
| Drop a column | A migration using $table->dropColumn(...) |
Working Safely with Production Data
- Always pair a change with a matching, correct
down()method - Test schema changes on a staging environment before running them in production
- Back up important data before running migrations that alter or drop columns
Once a schema is stable, testing and development still need realistic data to work with — which is exactly the gap that seeders and factories are designed to fill.
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