How to fix P3010: The name of the migration is too long in Prisma

First, identify how long your migration name is. The error message should show the problematic name:

Error: P3010: The name of the migration is too long. It must not be longer than 200 characters.
Migration name: "add_user_profile_settings_and_preferences_table_with_foreign_keys_and_indexes"
Length: 85 characters

If the error doesn't show the name, check what Prisma is trying to name the migration by looking at your schema changes.

When creating a migration, specify a shorter name using the --name flag:

# Instead of letting Prisma auto-generate a long name
npx prisma migrate dev

# Use a shorter, descriptive name
npx prisma migrate dev --name "add_user_profile"

Keep migration names concise but descriptive:
- Good: "add_user_profile"
- Too long: "add_user_profile_table_with_all_settings_and_preferences_and_foreign_keys"
- Ideal length: 20-60 characters

If you have many schema changes generating a long auto-name, consider breaking them into multiple migrations:

# First migration: Add user table
npx prisma migrate dev --name "add_user_table"

# Make additional schema changes in schema.prisma
# Then create second migration
npx prisma migrate dev --name "add_profile_table"

# Continue with additional changes

This approach:
1. Keeps migration names manageable
2. Makes migrations easier to understand
3. Allows for better rollback granularity
4. Follows the single responsibility principle for migrations

For existing migrations with long names, you can rename them in the _prisma_migrations table, but be cautious:

-- PostgreSQL example
UPDATE _prisma_migrations
SET migration_name = 'shorter_name'
WHERE migration_name = 'very_long_original_migration_name_that_exceeds_the_limit';

Warning: Only do this in development. In production, migration names should remain consistent across environments.

For future migrations, Prisma will use your shorter custom names.

While Prisma doesn't have direct configuration for auto-generated name length, you can influence it by:

1. Making smaller, focused schema changes - Each change generates a shorter description
2. Using meaningful abbreviations - When specifying custom names
3. Avoiding redundant information - Don't include "table", "column", "field" in every name
4. Using consistent naming conventions - Team agreement on migration naming

Example naming convention:
- "add_{model_name}" for new models
- "update_{model_name}_{field}" for field changes
- "remove_{model_name}" for deletions
- "{feature}_{description}" for feature-related migrations

After applying the fixes, test that migrations work correctly:

# Create a test migration with a short name
npx prisma migrate dev --name "test_fix"

# Check the migration was created
ls -la prisma/migrations/

# Apply the migration to your database
npx prisma migrate deploy

# Verify the migration appears in the _prisma_migrations table
npx prisma studio

Ensure the migration name appears correctly in both the filesystem and database.