Gatsby source plugin for Kentico Kontent
Description
(vNext) Source plugin for Kentico Kontent REST Delivery API.
Test change 7 Test change 8 Test change 9
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Delivery API alternations
Some of the data from Kontent Delivery API requires to be altered, or extended in order to be usable in Gatsby. There is a list of them with its description.
Preferred language
Besides of system.language every Kontent item node contains the property preferred_language to distinguish which language version it represents. Using this property, it is the easy to distinguish whether the language fallback is used. When preferred_language is not the same as system.language, Kontent item was not translated to preferred_language and the delivery API returned fallback language (system.language).
Linked items as links
Each linked items element in linked items element as well as in rich text element is using Gatsby GraphQL node references that can be used to traverse to the nodes linked through the use of the Linked items element.
The resolution is using the createFieldExtension called languageLink that is resolving the codenames. Embedded @link extension is not used because the links has to be resolved by preferred_language as well as system.codename equality and embedded link resolution allow to use only one field to make the links out of the box.
Linked Items element
query PersonQuery {
allKontentItemPerson {
nodes {
elements {
friends {
value {
... on kontent_item_person {
id
elements {
name_and_surname {
value
}
}
}
}
}
}
}
}
}Rich text element
query PersonQuery {
allKontentItemPerson {
nodes {
elements {
bio {
modular_content { // inline linked items as well as content components
... on kontent_item_website {
id
elements {
name {
value
}
url {
value
}
}
}
}
value
}
}
}
}
}Rich text images and links
Kontent REST API return images and links for Rich Text element in form of object, not as array:
{
"bio": {
"type": "rich_text",
"name": "Bio",
"images": {
"fcf07d43-46d4-46ef-a58d-c7bf7a4aecb1": {
"image_id": "fcf07d43-46d4-46ef-a58d-c7bf7a4aecb1",
"description": null,
"url": "https://assets-us-01.kc-usercontent.com:443/09fc0115-dd4d-00c7-5bd9-5f73836aee81/0faa87b4-9e1e-41b8-8b38-c107cbb35147/2.jpg",
"width": 1600,
"height": 1065
}
},
"links": {
"59002186-1886-48f3-b8ba-6f053b5cf777": {
"codename": "developer_community_site",
"type": "website",
"url_slug": ""
}
},
"modular_content": [],
"value": "..."
}
}This wrapper transforms these objects to the the arrays. In case ofe image the ID of an image is already stored there, in case of link, the id of a link is moved to linked_id property. The query then looks like:
query PersonQuery {
allKontentItemPerson {
nodes {
elements {
bio {
images {
# Object transformed to array
image_id
url
description
height
width
}
links {
# Object transformed to array
codename
type
url_slug
link_id # Newly generated property
}
}
}
}
}
}
Types' elements property
Elements property is transformed from object to array.
This is the "Website" type sample. As you can see there is element property, which is an object in Kontent delivery REST API.
{
"system": {
"id": "aeabe925-9221-4fb2-bc3a-2a91abc904fd",
"name": "Website",
"codename": "website",
"last_modified": "2019-04-01T18:33:45.0353591Z"
},
"elements": {
"url": {
"type": "text",
"name": "URL"
},
"name": {
"type": "text",
"name": "Name"
},
"description": {
"type": "rich_text",
"name": "Description"
}
}
}And here is the example how does the source plugin transform the data.
Query
{
kontentType(system: { name: { eq: "Website" } }) {
system {
codename
id
last_modified
name
}
elements {
name
codename
type
}
}
}Result
{
"data": {
"kontentType": {
"system": {
"codename": "website",
"id": "aeabe925-9221-4fb2-bc3a-2a91abc904fd",
"last_modified": "2019-04-01T18:33:45.0353591Z",
"name": "Website"
},
"elements": [
{
"name": "URL",
"codename": "url",
"type": "text"
},
{
"name": "Name",
"codename": "name",
"type": "text"
},
{
"name": "Description",
"codename": "description",
"type": "rich_text"
}
]
}
}
}How to install
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npmfor installation. This is the recommended approach for plugins as well. If the plugin is a theme that needs to useyarn, please point to the documentation for switching package managers in addition to theyarn-based instructions.
Available options (if any)
When do I use this plugin
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Examples of usage
This usually shows a code example showing how to include this plugin in a site's
config.jsfile.
{
"resolve": "@simply007org/gatsby-source-kontent-simple",
"options": {
"projectId": "09fc0115-dd4d-00c7-5bd9-5f73836aee81", // Fill in your Project ID
"languageCodenames": [
"default", // Or the languages in your project (Project settings -> Localization),
"Another_language"
],
"includeTaxonomies": true, // opt-out by default
"includeTypes": true, // opt-out by default
"usePreviewUrl": true, // false by default
"authorizationKey": "<API KEY>" // For preview/secured API key - depends on usePreviewUrl setting
}
}See this Markdown Cheatsheet on how to format code examples. This section could also include before-and-after examples of data when the plugin is enabled, if applicable.
How to query for data (source plugins only)
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How to run tests
How to develop locally
How to contribute
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- written according to Gatsby plugin template