Drupal 8 Node

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  1. Drupal 8 Node
  2. Drupal 8 Node Embed
  3. Drupal 8 Node Revision Delete
  4. Drupal 8 Node Operations Bulk Form
  5. Drupal 8 Node Load
  6. Drupal 8 Node Access

In Drupal 8, you can't use hookformFORMIDalter to handle both node creation and node editing forms for nodes of a given type. Search Drupal 8.2.x Function, class, file, topic, etc.

by , Software Architect

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This article is one of Metal Toad's Top 20 Drupal Tips. Enjoy!

Programmatically get all nodes from drupal 8. Ask Question Asked 2 years, 8 months ago. Active 2 years, 8 months ago. Viewed 10k times 2. I am trying to get all nodes of a certian type from drupal. I have tried many ways to achieve that, but maybe due to my lack of Drupal custom module programming experience I couldn't achieve my desire. For the developers out there, if you've already read the official Drupal 8 Entity API documentation and you want more examples, here's a handy cheat sheet: The examples here contain some hard-coded IDs. These are all examples. In your real code, you should already have the node IDs, file IDs, etc. There are plenty of ways to create links when using Drupal 8 and I will share some of those ways in this post. The easiest way to create internal links is using Link:. View titlecallback DrupalnodeControllerNodeViewController::title Requirements node d+ entityaccess node.view method GET POST Options compilerclass DrupalCore.

Wait, is it '$node->title' or '$node->title->value'? How do I write an EntityQuery again? Yeah, I can never remember, either.

For the developers out there, if you've already read the official Drupal 8 Entity API documentation and you want more examples, here's a handy cheat sheet:

The examples here contain some hard-coded IDs. These are all examples. In your real code, you should already have the node IDs, file IDs, etc. in a variable.

Working with nodes

Load a node by NID:

Get node's NID:

Get node's bundle type:

Get a built-in field value:

or the shorthand, with magic getters:

For more about that file entity target ID, see the 'Working with File Entities' section below

Drupal

Get nodes from a query:

Set fields

Delete node(s)

Working with Paragraphs

'Paragraphs' (from the popular contrib module of the same name) are separate entities that are related to the parent nodes via an entity reference revision.

Get paragraph entity type:

Working with File entities

Managed files are also separate entities, which are associated with the node using a type of Entity Reference.

Get a file by ID:

Get a file referenced in a node:

Reading some properties from a File entity:

To see what other properties are available, look at the columns in the `file_managed` table.

The file's user data

Working with Entity References

Reading from entity reference fields that allow multiple values:

Populate the value of an entity reference field which allows multiple values (this replaces any existing value in the DB)

Append new referenced items to an entity reference field (this preserves existing values)

I hope this saves everyone some time. It certainly is helpful to me every time I write a custom Drupal 8 module.

Happy coding!

Date posted: November 22, 2017

Comments

I prefer $node->bundle() rather than $node->getType() since it will work with all entity types, and getType() can be confused with getEntityType() or getEntityTypeId().

There are plenty of ways to create links when using Drupal 8 and I will share some of those ways in this post.

The easiest way to create internal links is using Link::createFromRoute

Drupal 8 Node

And it is used like this:

Using the Url object gives you more flexibility to create links, for instance, we can do the same as Link::createFromRoute method using the Url object like this:

And actually Link::fromTextAndUrl is what Drupal recommends instead of using the deprecated l() method. Passing the Url object to the link object gives you great flexibility to create links, here are some examples:

Internal links which have no routes:

Drupal 8 Node Embed

External links:

links with only the fragment (without url) :

Drupal 8 node access

Using the data provided by a user:

The param passed to fromUserInput must start with /,#,? or it will throw an exception.

Linking entities.

Entities are a special case, and there are more ways to link them:

And even using the route:

Drupal usually expects a render array if you are going to print the link, so the Link object has a method for that:

which will return an array.

Final tips:

Searching a route using Drupal Console

The easiest way to find the route of a specific path is using Drupal Console, with the following command.

Drupal 8 Node Revision Delete

That will return something like:

Listing all the possible routes with that word, we can choose one and do:

Drupal 8 Node Operations Bulk Form

And that will display more information about a specific route:

So in this way we can search the route without the needing to search in all the *.routing.yml files and in this example the route is entity.node.canonical and the param expected is node.

Print links directly within a twig template

It is also possible to print links directly on the twig template with the following syntax:

Drupal 8 Node Load

Drupal

Add links inside a t() method.

Drupal 8 Node Access

If you want to add a link inside the t() you can do what Drupal suggests on Dynamic or static links and HTML in translatable strings: