Open-source alternatives to Mapper

Spring Data Elasticsearch is a data access library that maps Java objects to Elasticsearch indices. It functions as an object mapper, a repository abstraction, and a query DSL wrapper, providing both a standard and a reactive client for executing asynchronous search and persistence operations. The project distinguishes itself by automating data access through repository interfaces, which generate query logic based on method naming conventions. It enables the construction of complex search queries using a domain-specific language and supports advanced search capabilities such as vector similar

Ebean is a Java object-relational mapping framework designed to simplify database persistence through automated query generation, schema migration, and transaction management. It uses metadata-driven mapping and bytecode enhancement to bridge the gap between application objects and relational database tables, providing a persistent layer that handles complex data interactions while maintaining consistency across unit-of-work boundaries. The framework distinguishes itself through its focus on developer productivity and performance optimization. It provides type-safe query builders that generat

This repository is a collection of technical knowledge and solutions focused on mobile application development, particularly for Android and iOS platforms. It covers a wide range of practical engineering challenges, including hotfix and patching techniques, database management and repair, network communication, logging, and video processing. The content is presented as shared knowledge, documenting real-world problems and their implementations. The project provides detailed guidance on applying hotfixes to running Android applications through multiple methods, such as class replacement, full

This project is a Java-based object-relational mapping framework that utilizes the active record pattern to simplify database interactions. It provides a comprehensive data access layer that binds database tables directly to application objects, enabling developers to perform CRUD operations, manage complex entity relationships, and execute queries through a fluent, type-safe interface. Designed for integration with Spring Boot, the framework abstracts database complexities while maintaining support for native compilation and asynchronous execution. The framework distinguishes itself through

SqlSugar is an object-relational mapping library for .NET that translates C# and VB objects into database queries and tables without requiring raw SQL. It is designed as a multi-database ORM supporting SQL Server, MySQL, PostgreSQL, Oracle, MongoDB, ClickHouse, and other databases through a unified API, and it is compatible with .NET AOT compilation for native ahead-of-time deployment. The library distinguishes itself through high-speed bulk data operations that can insert or update millions of records in seconds using batch processing instead of row-by-row handling. It also provides multi-te

The mongo-go-driver is a Go library for building applications that integrate with a MongoDB document store. It enables the storage and retrieval of flexible document data by providing a bridge between Go backends and the database. The driver implements specialized capabilities for semantic vector search, allowing the handling and execution of high-dimensional vector data for similarity-based retrieval. It also supports full-text search via linguistic analysis and programmatic search index management. The project covers a broad range of database operations, including document-based CRUD, bulk

This is a demonstration project that illustrates the classic SSM architecture pattern—combining SpringMVC, Spring, and MyBatis—for building scalable enterprise Java web applications. It serves as both a learning resource and a practical tutorial for developers who want to understand how these three frameworks work together in a full-stack context. The project provides a step-by-step guide for assembling SpringMVC, Spring, and MyBatis into a cohesive enterprise web application stack, covering everything from Spring dependency injection and transaction management to MyBatis database access and

FreeSql is a .NET object-relational mapper and data access layer that translates object-oriented code into SQL for multiple relational database providers. It functions as a fluent SQL query builder and database schema synchronizer, allowing developers to align database table and index structures with entity class definitions. The framework is specifically optimized for .NET Native AOT to ensure reduced memory footprints and faster startup times. It includes a database traffic manager to distribute load through read-write splitting, dynamic table sharding, and tenant-based data isolation. Bro

Gorp is a lightweight object-relational mapper for Go that binds structs to relational database tables. It functions as a relational data mapper and SQL dialect abstraction layer, automating the translation between application data and relational rows. The project provides a translation layer that generates vendor-specific SQL for PostgreSQL, MySQL, SQLite, Oracle, and SQL Server. It distinguishes itself by implementing optimistic locking via version columns to prevent concurrent update conflicts and providing a database schema generator to create tables and indexes from object definitions.

EntityFramework is a .NET object-relational mapper that translates application objects into database tables and rows. It functions as a query engine that converts high-level expressions into optimized SQL commands for data retrieval. The project provides a mechanism for monitoring modifications to loaded objects to synchronize application state with the database. It also includes a system for synchronizing database structures with data models using versioned migration scripts. The framework supports multi-backend database integration through a plugin system, allowing a single application to

This project is a PHP SQL REST API generator and database API wrapper that automatically transforms SQL database tables into a functional web interface. It serves as a lightweight layer that maps HTTP methods to SQL commands, allowing for the creation, reading, updating, and deletion of records without writing manual endpoint code. The tool distinguishes itself by providing a dedicated spatial data API gateway for querying and exporting geometry columns using GeoJSON and WKT standards. It also functions as a multi-tenant data API, capable of isolating records for different users through share

TypeSpec is a language for defining cloud API shapes and generating OpenAPI, JSON Schema, and client/server code from a single source of truth. It functions as a protocol-agnostic API designer that models REST, gRPC, and other API protocols using a unified, extensible syntax, with a decorator-based metadata system for attaching metadata, validation rules, and lifecycle visibility to API models and operations. The compiler produces OpenAPI 3.0 specifications and other artifacts, and the tool supports declaring API versions and tracking changes to models, properties, and operations across releas

This project is a Spring Boot API starter kit and RESTful project skeleton designed for building backend services. It provides a foundational codebase that implements a layered service architecture and standardized directory structures to organize controllers, services, and data mappers. The project features a MyBatis CRUD boilerplate generator that automates the creation of models and controllers from database tables using customizable templates. It includes a security framework for protecting endpoints via interface signature authentication to verify user identity and request authorization.

This project is a Spring Boot administrative framework and enterprise backend boilerplate designed for building management systems. It provides a foundation for enterprise-level applications using a reactive programming model and non-blocking data access patterns. The framework includes a reactive CRUD system for database operations and a role-based access control system to manage user accounts and administrative permissions. It further distinguishes itself with a centralized data dictionary for maintaining standardized labels and values across application modules. The system's broader capab

This is an AngularJS reference application that demonstrates the architecture, folder structure, and module organization required for building single page applications. It functions as a REST-based CRUD application designed for project management. The project includes a full CI/CD pipeline implementation and an automated test suite. These tools automate code linting, asset minification, and the execution of unit and end-to-end tests across multiple browsers to verify application logic. The application covers frontend access control through authentication and authorization patterns. It furthe

MyBatis-Flex is an object-relational mapping framework for Java that extends MyBatis with a fluent API and automated CRUD operations. It provides a data access suite featuring an automatic CRUD data mapper, a type-safe SQL query builder, and a row-based query engine for manipulating records without predefined entity classes. The framework includes a multi-dialect SQL translator that converts generated syntax across different database engines, such as MySQL, PostgreSQL, and Oracle. It further distinguishes itself by offering annotation-free entity mapping using runtime reflection and naming co

Baserow is a no-code relational database and application builder that allows users to create structured data tables and business tools through a visual interface. It functions as a headless REST API data backend and a self-hosted data workspace, providing a platform for managing collaborative databases while maintaining full control over data residency. The platform integrates large language models to serve as an LLM-powered data platform, capable of generating database structures, record content, and technical workflows from natural language. It also acts as a Model Context Protocol server,

Pothos is a code-first GraphQL schema builder and framework designed for type-safe development. It allows developers to construct schemas using typed definitions in TypeScript, eliminating the need for external code generation steps. The framework distinguishes itself through a dedicated data mapper that connects GraphQL types to relational databases and ORMs, such as Prisma, while optimizing query resolution. It provides a full implementation of the Relay specification, including global object identification and cursor-based pagination. The project covers several core capability areas, incl

This project is a header-only C++ library that provides an object-relational mapping layer for SQLite databases. It enables developers to map native class structures directly to database tables, facilitating type-safe data persistence and retrieval without the need for raw query strings. The library distinguishes itself through the use of template-based metaprogramming, which allows for compile-time schema mapping and query construction. By utilizing a fluent interface, it translates method calls into optimized database statements, while its support for prepared statement caching minimizes pa

FastHTML is a full-stack Python web framework designed for building interactive web applications using pure Python. It functions as an HTMX integration framework and a Python HTML domain-specific language, allowing developers to generate HTML structures using native objects and functions instead of external templating files. The framework is distinguished by its native support for real-time bidirectional communication via WebSockets and Server-Sent Events, enabling server-side updates to be pushed to the browser without full page reloads. It further integrates identity management through OAut

Sequel is a relational database toolkit for Ruby that provides object-relational mapping, a fluent SQL query builder, and schema migration capabilities. It maps database tables to Ruby classes with support for associations, validations, lifecycle hooks, and eager loading, offering a comprehensive ORM layer for building data-centric applications. Sequel distinguishes itself through a plugin-based extension architecture that allows composable customization of models, databases, and datasets without relying on deep inheritance hierarchies. It includes a thread-safe connection pool with support f

bknd is a self-hosted backend-as-a-service platform and serverless backend framework that provides an integrated environment for managing databases, authentication, and file storage. It functions as a headless CMS and a portable API engine designed to run across various JavaScript runtimes, including Node.js, Bun, Cloudflare Workers, and AWS Lambda. The project distinguishes itself through a combination of schema-driven API generation and a built-in database management UI. It enables the definition of data structures either programmatically via a type-safe API or visually through an administr

smartTable is a data grid component and table view framework for Android. It functions as an annotation-driven UI library that uses class and field markers to automatically map data models to visual columns and define table properties. The project distinguishes itself through deep spreadsheet integration, providing tools to import and export data to and from Excel files while preserving cell formatting, styles, colors, and alignment. It also features a canvas-based rendering system that supports complex grid layouts with merged cells, frozen headers, and column locking. The library covers a

deployd is a realtime API framework and MongoDB backend as a service that allows for the creation of networked interfaces synchronizing data and events between clients and servers. It functions as a JavaScript API middleware that can be integrated with HTTP servers to provide authentication, request interceptors, and realtime capabilities. The project features a self-hosted API management dashboard for configuring resource settings, managing data collections, and monitoring server status through a web-based interface. It includes a realtime data synchronization engine that pushes live databas

greenDAO is an object-relational mapping library for Android that maps Java objects to SQLite databases. It provides infrastructure for high-performance data persistence by translating data objects into database records and vice versa. The library implements a type-safe query builder for retrieving records across multiple entities using joins and relationship chaining. It also includes a security layer that provides full-disk encryption for the SQLite database to prevent unauthorized access to stored information. The system utilizes compile-time code generation to create mapping classes, avo

LitePal is an object-relational mapping library and SQLite database wrapper for Android applications. It replaces raw SQL queries with a fluent interface and object mapping to simplify local data persistence and database management. The project provides a specialized system for automatically synchronizing database schemas based on model definitions to handle version updates. It also includes a storage solution for securing sensitive data through configurable field-level encryption. The library covers broad data storage and synchronization capabilities, including atomic transaction support, m

This project is an object persistence library and data mapper abstraction layer. It provides a set of shared interfaces and base classes designed to decouple domain logic from specific object mapper implementations, separating the business domain layer from the underlying data access implementation. The library includes a database schema management and migration tool for defining, versioning, and deploying incremental updates to database structures across different environments. It also functions as a document database mapper, translating object states into structured document formats for sto