https://github.com/msolvaag/state-odb

Normalizer and object relation manager for state based systems (redux/vuex)
https://github.com/msolvaag/state-odb

db normalize redux state state-management vuex

Last synced: about 2 months ago
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Normalizer and object relation manager for state based systems (redux/vuex)

• Host: GitHub
• URL: https://github.com/msolvaag/state-odb
• Owner: msolvaag
• License: mit
• Created: 2018-02-27T10:04:18.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2018-03-19T09:05:32.000Z (about 8 years ago)
• Last Synced: 2025-09-24T05:21:34.698Z (8 months ago)
• Topics: db, normalize, redux, state, state-management, vuex
• Language: TypeScript
• Size: 60.5 KB
• Stars: 1
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md

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README

          
# state-odb

[![NPM downloads](https://img.shields.io/npm/dm/state-odb.svg?style=flat-square)](https://www.npmjs.com/package/state-odb)

[![NPM package](https://img.shields.io/npm/v/state-odb.svg?style=flat-square)](https://www.npmjs.com/package/state-odb)

state-odb provides a normalized state and easy object management.

## Why

Having a normalized state is a good strategy if your data is nested in different ways. The redux documentation has a nice explanation [here](http://redux.js.org/docs/recipes/reducers/NormalizingStateShape.html).

state-odb is a port of the redux-db project with means to decouple the term redux from the logic it provides. state-odb is compatible with all single state controlled systems. ( vuex/redux/..).

## How

``` javascript

import db from "./schema";

export const dbReducer = db.combineReducers(

    (session, action) => {

        const { BlogPost, Comment, User } = session;

        switch (action.type) {

            case "POSTS_FETCH_DONE":

            case "POST_FETCH_DONE":

            case "POST_UPDATE":

            case "POST_INSERT":

                // all these actions may be handled using just one statement.

                // the upsert method accepts both single objects and arrays.

                // the payload is automatically normalized and related tables are also updated.

                BlogPost.upsert(action.payload);

                break;

            case "POST_DELETE": {

                const { id } = action.payload;

                const post = BlogPost.get(id);

                post.comments.delete(); // Could be skipped if cascading deletes are defined.

                post.delete();

                // or just, BlogPost.delete( id );

                break;

            }

            case "COMMENT_UPDATE":

            case "COMMENT_INSERT": {

                // assuming payload contains {id,post,author}

                const { post } = action.payload;

                BlogPost.get(post).comments.add(action.payload);

                // or just, Comment.upsert(action.payload);

                break;

            }

            case "COMMENT_DELETE": {

                const { id } = action.payload;

                Comment.delete(id);

                break;

            }

        }

    }

);

```

## Contact / feedback

Feel free to create issues and PR's.

## Dependencies

* none