sequelize/sequelize

Features

• Object-Relational Mappers - Maps database tables to application objects to provide a unified interface for managing relational data through code.
• Database Drivers - Sequelize manages database connections by creating instances with specific parameters, verifying connection status, and handling the connection lifecycle.
• Object-Relational Mapping - Sequelize maps objects to database tables by extending a base class or using a factory method to define attributes and configuration.
• Query Builders - Sequelize provides a query builder that translates high-level object-oriented method calls into dialect-specific SQL statements for consistent database interactions.
• Relational Mappings - Sequelize connects database tables using one-to-one, one-to-many, or many-to-many relationships to manage complex data structures effectively.
• Data Access Layers - Sequelize manages model instances by performing create, read, update, and delete operations for individual database records.
• Relational Association APIs - Sequelize defines relationships between database models by calling association functions like belongsTo, hasOne, hasMany, or belongsToMany on a source model.
• Data Modeling - Sequelize supports assigning specific database-native types to model columns using built-in options that map directly to database definitions.
• Data Validation - Sequelize defines model attributes using a type-safe system that validates data types by default and enforces strict constraints on values.
• Database Migration Tools - "Compares model definitions against the current database state to automatically generate and execute migration scripts for structural alignment."
• Database Transactions - Sequelize manages database transactions using asynchronous storage to enable automatic transaction tracking and atomic units of work.
• Lifecycle Hooks - Sequelize allows executing custom logic automatically before or after specific model operations by registering functions that trigger during defined lifecycle events.
• Polymorphic Associations - Sequelize enables polymorphic associations, allowing a single entity to belong to more than one other type of entity using a shared interface.
• Schema Migration Tools - A tool that aligns application model definitions with underlying database structures by automatically creating or altering tables to match configuration.
• Transaction Managers - Groups multiple database operations into atomic units of work using internal storage to ensure consistency across asynchronous execution flows.
• Type System Tools - Sequelize supports TypeScript projects with modern module resolution options, providing type definitions for standard runtime environments.
• Databases - Multi-dialect ORM for SQL databases.
• Object Relational Mappers - Multi-dialect ORM for SQL databases.
• Search and Databases - Offers a feature-rich ORM for Node.js.
• Database Migrations - Sequelize tracks schema changes over time using versioned files that define state transitions and support reverting changes when necessary.
• Connection Pools - Sequelize configures connection pooling during initialization to manage multiple database connections efficiently from a single process.
• Database Dialect Adapters - Sequelize interacts with specific database systems using dialect-specific query interfaces that handle unique communication requirements for various supported engines.
• Database Dialects - Sequelize connects to specific database engines by importing dedicated dialect packages to reduce main package size and remove manual driver installation requirements.
• Association Scoping - Sequelize allows applying predefined conditions to related records to ensure only specific data is returned when querying through established associations.
• Custom Data Types - Sequelize enables defining specialized data formats by extending base functionality when standard options do not meet specific database requirements.
• Database Access Layers - Sequelize executes raw queries by running custom or pre-prepared database commands directly when standard abstraction methods do not meet specific requirements.
• Database Performance Optimizers - Sequelize optimizes database performance by implementing batching and caching strategies to reduce server load and improve response times.
• Eager Loading - Sequelize loads related data from multiple models in a single database query using joins to reduce the number of round trips to the server.
• Schema Migrations - Sequelize supports automatic schema synchronization to keep the database structure in sync with application model definitions.
• Query Logging - Sequelize allows developers to monitor database queries by providing custom handler functions for debugging or routing logs to external monitoring tools.

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