Geocode an address with Algolia

Please be sure of your agent type and version and pick the right documentation accordingly.

Node.js

This is the documentation of the forest-express-sequelize and forest-express-mongoose Node.js agents that will soon reach end-of-support.

forest-express-sequelize v9 and forest-express-mongoose v9 are replaced by @forestadmin/agent v1.

Please check your agent type and version and read on or switch to the right documentation.

Ruby on Rails

Python

PHP

Geocode an address with Algolia

This example shows you how to use an autocomplete address smart field to update a PostreSQL geography point (lat, long).

https://youtu.be/SWldaV29s9Uyoutu.be

Requirements

• An admin backend running on forest-express-sequelize

• An algolia account

• algoliasearch npm package

How it works

Directory: /models

This directory contains the events.js file where the model is declared.

models/events.js

module.exports = (sequelize, DataTypes) => {
  const Model = sequelize.define(
    'events',
    {
      name: {
        type: DataTypes.STRING,
        primaryKey: true,
      },
      locationGeo: {
        type: DataTypes.GEOMETRY('POINT', 4326),
      },
      address: {
        type: DataTypes.STRING,
      },
    },
    {
      tableName: 'events',
      underscored: true,
      timestamps: false,
      schema: process.env.DATABASE_SCHEMA,
    }
  );

  Model.removeAttribute('id');
  Model.associate = () => {};

  return Model;
};

Directory: /forest

This directory contains the events.js file where the Smart Field Location setteris declared. This smart field will be used to update the value of the addressand locationGeo fields.

/forest/events.js

const algoliasearch = require('algoliasearch');

const places = algoliasearch.initPlaces(
  process.env.PLACES_APP_ID,
  process.env.PLACES_API_KEY
);

async function getLocationCoordinates(query) {
  try {
    const location = await places.search({ query, type: 'address' });
    console.log('search location coordinates result', location.hits[0]._geoloc);
    return location.hits[0]._geoloc;
  } catch (err) {
    console.log(err);
    return null;
  }
}

async function setEvent(event, query) {
  const coordinates = await getLocationCoordinates(query);
  event.address = query;
  event.locationGeo = `{"type": "Point", "coordinates": [${coordinates.lat}, ${coordinates.lng}]}`;
  console.log('new address', event.address);
  console.log('new location', event.locationGeo);
  return event;
}

collection('events', {
  fields: [
    {
      field: 'Location setter',
      type: 'String',
      // Get the data to be displayed.
      get: (event) => event.address,
      // Update using Algolia.
      set: (event, query) => setEvent(event, query),
    },
  ],
});

The field Location setter should use the address edit widget to enable address autocomplete.