Drupal Fetch

Helper functions to fetch JSON:API resources from a Drupal site.

This library simplifies the process of retrieving data from a Drupal backend and handles common operations such as fetching single resources, resource collections, menu items and views.

Installation

Install drupal-fetch, use the package manager of your choice:

Note: drupal-jsonapi-params is a helper library used to create complex queries easily.

npm install drupal-fetch drupal-jsonapi-params

Usage/Examples

Import and Instantiate Fetcher:

import { DrupalFetch } from "drupal-fetch";

const fetcher = new DrupalFetch("https://drupal-site-base-url.com");

Fetching a Single Resource:

// fetch article with uuid.
const article = await fetcher.getResource<DrupalNode>(
  "node--article",
  "2a8758e2-70a5-4ffb-ade1-25da62963bd6"
);

// fetch a text block paragraph with uuid.
const textBlock = await fetcher.getResource<DrupalParagraph>(
  "paragraph-text_block",
  "2a8758e2-70a5-4ffb-ade1-25da62963bd6"
);

Fetching a Collection of Resources:

// fetch a sorted list of published node--resource content.
const resources = await fetcher.getResourceCollection<DrupalNode[]>(
  "node--resources",
  {
    params: new DrupalJsonApiParams()
      .addFilter("status", "1") // filter out unpublished content.
      .addSort("created", "DESC"), // sort by created date.
  }
);

Fetching Menu Items

The getMenu method returns a drupal menu in a tree-like format.

const mainMenu = await fetcher.getMenu("main");

Fetching View Results

// pass contextual filter params to drupal view.
const params = new DrupalJsonApiParams();
params.addCustomParam({ "views-argument": ["11+15+19"] });

const menuView = await fetcher.getView("menu--default", { params });

Using drupal-jsonapi-params

• We can form requests for specific data from drupal entities, and sort, paginate, filter them as needed using the drupal-jsonapi-params package.
• Most fields, entities have an id that can be useful as a key prop when mapping through items in React.

Examples:

Here are a few examples for fetching various fields on a drupal resource:

Basic usage

Most fields can be accessed simply by adding the field name to the parameters.

• These include title, Text (plain), Boolean, Color etc

const params = new DrupalJsonApiParams().addFields("node--resource", [
  "title",
  "field_subtitle",
  "field_theme_color",
  "field_is_enabled",
]);

Output:

{
  type: 'node--resource',
  title: 'Example Resource',
  field_subtitle: 'Test subtitle value',
  field_theme_color: { color: '#FAFAFA', opacity: null },
  field_is_enabled: false,
}

Note: some fields may be objects like field_theme_color above. These can be accessed in the React component like any other json object.

Accessing referenced fields

• Some fields are Drupal entities themselves.
• However, these objects can get really large, so we can request only the required properties as below:

Media Entity

const params = new DrupalJsonApiParams()
  .addFields("node--resource", ["field_thumbnail"]) // get Media field on Resource content type
  .addInclude(["field_thumbnail", "field_thumbnail.field_media_image"]) // request for that Media Entity, and the nested File Entity.
  .addFields("file--file", ["uri", "resourceIdObjMeta"]); // For that File Entity, get uri and metadata for alt, height, width.

Output:

{
  type: 'media--image',
  field_media_image: {
    type: 'file--file',
    uri: {
      value: 'public://image.jpg',
      url: 'http://site/image-pathimage.jpg'
    },
    resourceIdObjMeta: {
      alt: 'alt',
      title: '',
      width: 640,
      height: 960,
    }
  },
}

Taxonomy Term

• Access data for a taxonomy vocabulary called "Audience", referenced in the field_audience:

const params = new DrupalJsonApiParams()
  .addFields("node--resource", ["field_audience"]) // get taxonomy field on Resource content type
  .addInclude(["field_audience"]) // request for that taxonomy entity's data
  .addFields("taxonomy_term--audience", ["name", "path"]); // For that Taxonomy Entity, get name, path, or any other fields

Output:

{
  type: 'node--resource',
  field_audience: {
    type: 'taxonomy_term--audience',
    id: '345feac2-e262-4298-91d3-c7d965c73f56',
    name: 'Students',
    path: { alias: '/students', pid: 3, langcode: 'en' },
  },
}

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