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json-api-denormalizr

Getting Started

npm install json-api-denormalizr --save

Documentation

• Quick Start
• API
  • denormalize
• Usage with Reselect

Quickstart

Given the following store / state in your Redux application:

{
  "entities": {
    "postBlock": {
      "2620": {
        "id": "2620",
        "attributes": {
          "text": "I am great!",
          "id": "2620"
        },
        "relationships": {
          "question": {
            "data": {
              "id": "295",
              "type": "question"
            }
          }
        }
      }
    },
    "question": {
      "295": {
        "id": "295",
        "attributes": {
          "text": "How are you?",
          "id": "295"
        }
      }
    }
  }
}

import { denormalize } from 'json-api-denormalizr';

denormalize(state, {
  id: '2620',
  attributes: {
    text: 'I am great!',
    id: '2620'
  },
  relationships: {
    question: {
      data: {
        id: '295',
        type: 'question'
      }
    }
  }
});

// equivalent to:
denormalize(state, state.entities.postBlock['2620'])

Will result in:

{
  "id": "2620",
  "question": {
    "id": "295",
    "text": "How are you?"
  },
  "text": "I am great!"
}

API

denormalize(state, entity, options = {})

• state: your application state
• entity: the top level entity
• options:
  • pathToEntities:
    • Where all your entities are located in the store. Assumes all your entities are at the same level of the store.

Usage with Reselect

Quick example using selectors:

import { createSelector } from 'reselect';
import { denormalize } from 'json-api-denormalizr';

const entitiesSelector = state => state.entities;
const booksSelector = state => state.entities.books;

export const bookSelector = bookId => {
  return createSelector([entitiesSelector, booksSelector], (entities, books) => {
    const book = books[bookId];

    return denormalize(entities, book, {
      pathToEntities: 'entities'
    });
  });
};

Contributing

npm test