{"id":31583009,"url":"https://github.com/darshparikh25/sequelize","last_synced_at":"2026-04-10T00:12:07.406Z","repository":{"id":317396549,"uuid":"1067000164","full_name":"DarshParikh25/sequelize","owner":"DarshParikh25","description":null,"archived":false,"fork":false,"pushed_at":"2025-09-30T15:57:24.000Z","size":67,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2025-09-30T17:33:31.157Z","etag":null,"topics":["expressjs","git","javascript","mariadb","microsoft-sql-server","mysql","nodejs","npm","oracle-database","postgresql","reactjs","sequelize","sql","sqlite3","yarn"],"latest_commit_sha":null,"homepage":"","language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/DarshParikh25.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2025-09-30T08:46:06.000Z","updated_at":"2025-09-30T15:57:28.000Z","dependencies_parsed_at":"2025-09-30T17:36:08.747Z","dependency_job_id":"e2858b5c-82ef-4c68-9e0e-4655e9e0b742","html_url":"https://github.com/DarshParikh25/sequelize","commit_stats":null,"previous_names":["darshparikh25/sequelize"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/DarshParikh25/sequelize","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DarshParikh25%2Fsequelize","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DarshParikh25%2Fsequelize/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DarshParikh25%2Fsequelize/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DarshParikh25%2Fsequelize/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/DarshParikh25","download_url":"https://codeload.github.com/DarshParikh25/sequelize/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DarshParikh25%2Fsequelize/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":278537758,"owners_count":26003250,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-10-05T02:00:06.059Z","response_time":54,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["expressjs","git","javascript","mariadb","microsoft-sql-server","mysql","nodejs","npm","oracle-database","postgresql","reactjs","sequelize","sql","sqlite3","yarn"],"created_at":"2025-10-05T23:57:01.434Z","updated_at":"2025-10-05T23:57:03.217Z","avatar_url":"https://github.com/DarshParikh25.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Sequelize Fast-Track Roadmap — Phased Lessons\n\n**Goal:** Learn Sequelize (Node.js ORM) quickly and deeply — one topic at a time, with theory + analogy + practical examples + exercises.\n\n---\n\n## Prerequisites (what you should already know)\n\n- Basic JavaScript (ES6+), async/await\n- Node.js and npm/yarn\n- Basic SQL (SELECT, JOIN, INSERT, UPDATE) — not deep, just concepts\n- Familiarity with Express.js (for building APIs) and React (for front-end integration)\n- Git and terminal comfort\n\n---\n\n# PHASE 0 — Quick Setup (must-have)\n\n- Choose a relational DB: **Postgres (recommended)**, MySQL, MariaDB, SQLite (good for tests/dev).\n- Packages you'll typically use:\n  - `sequelize` (core)\n  - `sequelize-cli` (optional but highly recommended for migrations/seeds)\n  - dialect driver: `pg` + `pg-hstore` (Postgres), `mysql2` (MySQL), `mariadb` (MariaDB), `sqlite3` (SQLite), `tedious` (Microsoft SQL Server) and `oracledb` (Oracle Database)\n\nQuick CLI starter commands (cheat-sheet):\n\n```bash\nnpm init -y\nnpm install sequelize\nnpm install --save-dev sequelize-cli\n# One of the following:\n$ npm install --save pg pg-hstore # Postgres\n$ npm install --save mysql2 # MySQL\n$ npm install --save mariadb # MariaDB\n$ npm install --save sqlite3 # SQLite\n$ npm install --save tedious # Microsoft SQL Server\n$ npm install --save oracledb # Oracle Database\n```\n\n---\n\n# PHASE 1 — **Fundamentals** (minimum to be productive)\n\n1. **What is Sequelize \u0026 when to use it**\n\n   - Short: An ORM that maps JS objects to SQL tables and provides a high-level API.\n   - Why it helps: Faster development, safer queries, cross-dialect portability.\n   - Analogy: Sequelize is the translator between your JS code and the database.\n\n2. **Project setup \u0026 connection**\n\n   - Create Sequelize instance, environment config (dotenv), connection testing (`sequelize.authenticate()`), pool options.\n   - Minimal code snippet included in lesson.\n\n3. **Models \u0026 DataTypes**\n\n   - `sequelize.define()` vs `class Model extends Model` + `init()`.\n   - DataTypes: `STRING, INTEGER, BOOLEAN, DATE, JSON, TEXT, DECIMAL` etc.\n   - Field options: `allowNull`, `defaultValue`, `unique`, `validate`.\n\n4. **Migrations (why \u0026 how)**\n\n   - `sequelize-cli` setup, `model:generate`, migration `up/down`, running `db:migrate`.\n   - Why migrations are preferable to `sync({ force: true })` in production.\n\n5. **CRUD basics**\n\n   - `create`, `findOne`, `findAll`, `findByPk`, `update`, `destroy`.\n   - `findOrCreate`, `increment`, `decrement`.\n\n6. **Associations (basic)**\n\n   - `hasOne`, `belongsTo`, `hasMany`, `belongsToMany` (through table).\n   - FK ownership, `onDelete`/`onUpdate` behaviors.\n\n7. **Querying \u0026 Operators**\n\n   - `where` clause, `Op` operators (`Op.gt`, `Op.like`, `Op.in`, `Op.or`), `attributes`, `order`, `limit`, `offset`.\n\n8. **Hooks \u0026 Validations**\n\n   - Lifecycle hooks: `beforeCreate`, `afterUpdate`, etc.\n   - Built-in validations and custom validators.\n\n9. **Transactions (essential)**\n\n   - Managed vs unmanaged transactions, passing `{ transaction: t }`, rollback behavior.\n\n10. **Integrating with Express (simple REST)**\n\n- Pattern for controllers, error handling, request → DB flow.\n\n---\n\n# PHASE 2 — **Intermediate** (deeper practical skills)\n\n1. **Advanced Associations**\n\n   - Many-to-many through models with extra fields, aliasing (`as`), `through` options.\n\n2. **Eager loading patterns**\n\n   - Nested `include`, selecting attributes per association, `required` vs optional join, `separate: true` for large collections.\n\n3. **Scopes \u0026 Query Helpers**\n\n   - `defaultScope`, named scopes, reusable query patterns.\n\n4. **Model options \u0026 indexes**\n\n   - `paranoid` (soft delete), `timestamps`, `underscored`, schema support, indexes for performance.\n\n5. **Bulk operations \u0026 performance**\n\n   - `bulkCreate`, `bulkUpdate` (via `update` with where), `upsert`, `RETURNING` behavior.\n\n6. **Raw queries \u0026 SQL security**\n\n   - `sequelize.query()` with replacements/binds, avoiding SQL injection, when to use raw SQL.\n\n7. **Pagination (offset \u0026 cursor-based)**\n\n   - Implementing efficient pagination and considerations for large datasets.\n\n8. **Connection pooling \u0026 config tuning**\n\n   - Pool params, reconnect logic, logging control.\n\n9. **Testing models**\n\n   - In-memory SQLite for unit tests, factories, seeding test data, mocking.\n\n---\n\n# PHASE 3 — **Advanced**\n\nThese are advanced topics you can learn after the intermediate set.\n\n1. **Polymorphic \u0026 Self-referential associations**\n\n   - Implementing tagging systems, comment threading, recursive relations.\n\n2. **Multi-tenant patterns**\n\n   - Row-based vs schema-based tenancy, pros/cons, migration strategies.\n\n3. **Zero-downtime migrations \u0026 production workflows**\n\n   - Adding columns safely, backfilling data, rollouts.\n\n4. **Complex query optimization**\n\n   - Explain plans, index strategies, denormalization trade-offs.\n\n5. **Sequelize + GraphQL + DataLoader**\n\n   - N+1 problem, batching resolver patterns, dataloader integration.\n\n6. **TypeScript + Sequelize**\n\n   - Typings, `sequelize-typescript` or manual typing patterns, pros/cons.\n\n7. **Custom data types, getters/setters, virtual fields**\n\n   - Virtual attributes, JSON columns, custom casting.\n\n8. **Contributing to Sequelize / reading source**\n\n   - How to navigate the library codebase if you want to contribute or debug.\n\n---\n\n# Capstone Projects (pick one to build end-to-end)\n\n- **Blog + Comments + Tags**: Users, Posts, Comments, Tags (many-to-many). Full REST API + React front-end. Auth, pagination, search.\n- **E-commerce-ish**: Products, Categories, Orders, OrderItems, Inventory, Payments (mock). Multi-table transactions for checkout.\n- **Job board**: Jobs, Companies, Applicants, resume upload (file handling), search filters.\n\nEach capstone will be split into tasks and lessons (DB design, models, migrations, APIs, frontend integration, testing, deployment).\n\n---\n\n# Quick Best Practices (summary)\n\n- Use migrations in all non-trivial projects; avoid `sync({ force: true })` in prod.\n- Keep models thin: validation + relations. Put business logic in services.\n- Always use transactions when multiple related writes happen.\n- Watch SQL logs while developing to understand generated queries.\n- Use parameterized queries / replacements for raw SQL.\n- Add indexes based on query patterns, not prematurely.\n\n---\n\n# How I will teach each topic (my lesson format)\n\n1. One-paragraph explanation + real-world analogy\n2. Minimal code example with comments (ready to run)\n3. Step-by-step walkthrough of the code\n4. Common pitfalls \u0026 debugging tips\n\n---\n\n## Download Roadmap\n\n- Click here to [download roadmap](https://docs.google.com/document/d/1RaSZQBVtQ7Rr1L3uE5vsFSqPM4yo9gNU/edit?usp=sharing\u0026ouid=109390071948652773067\u0026rtpof=true\u0026sd=true) in **Word** format.\n- Click here to [download roadmap](https://drive.google.com/file/d/1LJ2fBip4bUsJa3_Jk1nlazK4xWga8Vxf/view?usp=sharing) in **PDF** format.\n\n---\n\n## 👤 Author\n\n### **Darsh Parikh**\n\n- 💼 GitHub: [@DarshParikh25](https://github.com/DarshParikh25)\n- 🔗 LinkedIn: [darshparikh](https://www.linkedin.com/in/darsh-parikh-66538a251)\n- 📫 Email: darshparikh00@gmail.com\n\n---\n\n## 📬 Feedback\n\nHave suggestions or questions? \\\nFeel free to open an issue.\n\n\u003e Made with ❤️ by **Darsh Parikh**\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdarshparikh25%2Fsequelize","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdarshparikh25%2Fsequelize","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdarshparikh25%2Fsequelize/lists"}