Learn the core concepts of Object-Relational Mapping and database abstraction.
- What are ORMs?
- Object-relational impedance mismatch
- ORM benefits and drawbacks
- Active Record vs Data Mapper
- ORM vs Query Builders
- Database abstraction layers
- Model-driven development
- ORM selection criteria
Define database models, entities, and their mapping to database tables.
- Model definition concepts
- Entity classes
- Attributes and properties
- Data types mapping
- Table and column naming
- Primary and foreign keys
- Constraints and validations
- Model annotations
Master Sequelize, the popular Node.js ORM for SQL databases.
- Sequelize setup and configuration
- Model definition
- Database connections
- CRUD operations
- Query methods
- Associations
- Validations and hooks
- Transactions
Learn Prisma, the modern database toolkit with type-safe client generation.
- Prisma schema definition
- Prisma Client generation
- Database introspection
- Type-safe queries
- Prisma Studio
- Database seeding
- Multi-database support
- Real-time subscriptions
Model complex relationships between entities and manage associations.
- One-to-One relationships
- One-to-Many relationships
- Many-to-Many relationships
- Self-referencing associations
- Polymorphic associations
- Eager vs lazy loading
- Cascading operations
- Relationship queries
Build complex queries using ORM query builders and methods.
- Query builder patterns
- Filtering and conditions
- Sorting and ordering
- Pagination techniques
- Aggregation queries
- Subqueries
- Raw SQL integration
- Dynamic query building
Manage database schema changes through migrations and versioning.
- Migration concepts
- Schema versioning
- Migration files
- Up and down migrations
- Data migrations
- Migration rollbacks
- Environment-specific migrations
- Migration best practices
Implement data validation and database constraints through ORM features.
- Model validations
- Built-in validators
- Custom validation rules
- Database constraints
- Unique constraints
- Foreign key constraints
- Check constraints
- Validation error handling
Explore advanced ORM capabilities like hooks, events, and middleware.
- Model hooks and lifecycle
- Before/after callbacks
- Event systems
- Model middleware
- Virtual attributes
- Computed properties
- Model scopes
- Plugin architectures
Optimize ORM performance through caching, query optimization, and best practices.
- N+1 query problem
- Eager loading strategies
- Query optimization
- Connection pooling
- Caching mechanisms
- Batch operations
- Index utilization
- Performance monitoring
Test ORM models, relationships, and database interactions effectively.
- Unit testing models
- Integration testing
- Database test setup
- Test data factories
- Mocking ORM operations
- Transaction rollbacks
- Test database isolation
- Performance testing
Learn industry best practices for ORM usage in production applications.
- ORM design patterns
- Repository pattern
- Unit of Work pattern
- Error handling strategies
- Security considerations
- Multi-tenancy support
- Microservices with ORMs
- Production deployment