Database Seeding

Idempotent seeders use firstOrCreate and updateOrCreate methods to safely re-run without duplicating data. These Laravel methods check if a record exists before inserting or updating, allowing seeders to run multiple times across environments without errors.

Separate seeders into three categories: Core seeders always run, Reference seeders run optionally for lookup tables, and Development seeders run only locally. The DatabaseSeeder orchestrates which category executes based on environment.

Yes, environment-specific execution logic lets you control which seeders run in development, staging, and production. The DatabaseSeeder class checks the current environment and executes only the appropriate seeder categories.

Use firstOrCreate and updateOrCreate within organized seeder classes grouped by category. This pattern ensures data consistency across repeated executions while maintaining a clear directory structure for core, reference, and development seeders.

firstOrCreate prevents duplicate records when seeders run multiple times by checking if data already exists. If the record exists, it returns the existing row; if not, it inserts a new one, making your seeder safe and repeatable.