Questions tagged [8]

Version tags should be used for questions that apply to a version only, not to merely say what version a site is using.

Filter by
Sorted by
Tagged with
81
votes
11answers
152k views

How do I get the current path alias or path?

How can I get the current alias and/or path in Drupal 8? In Drupal 7 I did this with drupal_get_path_alias(). What is the equivalent code I should use in Drupal 8?
76
votes
3answers
73k views

What does "The provided host name is not valid for this server" mean?

I am running a Drupal 8 website, and when I browse to any page, I get a plain white page with just the following error message on it. The provided host name is not valid for this server. What does ...
69
votes
10answers
187k views

How do I access a field value for an entity (e.g. node) object?

node_load((int) $nid) loads a fully-populated node entity. $node->title->value gets the title, but how do I access field values in Drupal 8?
65
votes
5answers
120k views

How do I get the current node ID?

In Drupal 7, if I wanted to get the node id of the currently displayed node (e.g. node/145) I could get it with the arg() function. In this case, arg(1) would return 145. How can I achieve the same ...
65
votes
8answers
53k views

How can I import the configuration on a different site?

I have this error when I try to import the config of an another site: The staged configuration cannot be imported, because it originates from a different site than this site. You can only ...
55
votes
6answers
77k views

How to get the base URL of a site

My site is on http://drupal8.local/. How do I get the drupal8.local part of that URL? Url::fromRoute('<'current'>') or base_path() returns the path parth of the URL; For example, for http://...
54
votes
1answer
32k views

What are all the directories for?

Drupal 8 re-arranged all the directories and locations of modules/themes etc. Where do things go now?
52
votes
12answers
97k views

How to get the valid URL of a Link field from within a Twig template?

I have a Link field named field_my_link (machine name). Within a Twig template I can get the link's URL value with this: {{ node.field_my_link.uri }} If inside the Link's URL there is an external ...
51
votes
16answers
107k views

Getting the image URL from a field_image on a node

So I have this Node: object(Drupal\node\Entity\Node)[1862] protected 'values' => array (size=17) 'vid' => array (size=1) 'x-default' => string '7' (length=1) ...
50
votes
10answers
66k views

Manually disable a module

In Drupal 7, I could manually edit the {system} table in the database to disable a stubbon module. In my Drupal 8 site, this table is gone. How can I manually disable a module in Drupal 8?
45
votes
6answers
79k views

How to get instance of referenced entity?

I have a node object with image field named field_image. When I do $node ->get('field_image') ->first() ->getValue() I get array with some properties instead of entity object. The ...
44
votes
14answers
39k views

How do I remove a configuration object from the active configuration?

I'm writing a custom module for Drupal 8. It defines a field storage configuration object, in a file called modules/mymod/config/install/field.storage.bloom_stem.bs_twitter_ac.yml. The problem is ...
42
votes
7answers
63k views

How can I programmatically create a node?

How can I programmatically create nodes with date and image fields? I know I can do it in Drupal 7 with the following code. global $user; $node = new stdClass(); $node->title = "YOUR ...
42
votes
10answers
74k views

How do I enable developer/debug mode?

Installing drupal 8 core (using standard profile). whenever I get exception/error, I get blank page with "The website has encountered an error. Please try again later." (as below image) text and no ...
42
votes
1answer
35k views

How to check if field exists in an entity?

In entity node, I want to check if 'abc' field exists or not. If exists, I will get its value by $value->get('abc'). But the content type where this field doesn't exists, gives error: The website ...
41
votes
7answers
75k views

How to get $_POST and $_GET parameters

I ajaxly call a route and pass data to it, In my controller, I want to get $_POST['var'] , $_POST['var2'], it seems because of using HttpFoundation in drupal 8, $_POST and $_GET are not exists in old ...
40
votes
9answers
83k views

How can I programmatically display a block?

I'm developing a site using Drupal 8 beta-14. I've created a view block of different terms and now I want to display it using code. How can I display it programatically? I used to do it in Drupal 7 ...
40
votes
7answers
19k views

How do I update the configuration of a module?

I'm building a custom module in Drupal 8. It includes some YAML config files. As I develop I need to change and add to the config, e.g. to add another field onto my custom entity. At present the only ...
40
votes
4answers
2k views

What is the suggested workflow for migrating (CMI) configuration from dev -> stage -> production?

We had a drupalcamp a few months back and someone asked about managing deployments with the new config (CMI) system. One possible ideal workflow would involve keeping the config in version control and ...
39
votes
7answers
109k views

How do I get the raw field value in a twig template?

myfield is a plain text field. {{ content.field_myfield }} renders the field with HTML markup and the field label. How do I render the raw value of the field? {{ content.field_myfield.value }} doesn'...
39
votes
6answers
31k views

Programmatically create a term?

I'm attempting to add a lot of terms (~200) to a vocabulary, but I can't find any import modules that are updated for Drupal 8, and it seems the functions for doing this in Drupal 7 don't exist in ...
37
votes
9answers
65k views

How can I get the path alias from a node ID or node object?

I have a node object, and I am trying to use it to get a given path in Drupal 8. There was drupal_lookup_path() in Drupal 7 but I'm not seeing any equivalent or documentation for Drupal 8. What's ...
37
votes
4answers
32k views

Pass raw html to #markup

I have some html content, it comes from a external library so i can not change it, it has many <span> and <div> tags with attributes like: <span style="color: #0000ff;">, but when i ...
36
votes
7answers
78k views

How do I translate strings in Twig templates?

I am working on a (my first) Drupal 8 project witch is a multilingual site. Drupal 8 really delivers in terms of native support for content translation. However, I have a few strings set directly in ...
35
votes
1answer
58k views

Get the route name of the current page

The route name of the current page is available in page.html.twig? The page is generated by the default feedback form.
34
votes
3answers
68k views

How do I get the user ID for the currently logged-in user?

I want to get current user object (user information) in Drupal 8. I know in Drupal 7 there was a global $user variable; I want to know how I can get current user object in Drupal 8.
34
votes
11answers
51k views

How can I change the page title?

In Drupal 7, I could change the page title with drupal_set_title(t('New page title')). When I try it in Drupal 8, I get a There is no such function error. How can I change the page title?
33
votes
10answers
80k views

How do I create a link?

Say I am extending The blockBase class to create a custom block, and I am implementing the blockBuild method to create some markup for my block. Something like this: class YourModuleBlock extends ...
33
votes
5answers
24k views

How know if user is visitor or logged member?

How can I determine programatically whether the current user is anonymous or authenticated?
32
votes
3answers
27k views

Import a single yml configuration file

Is it possible to import one single configuration file by specifying its path, or a group of Yaml files contained in a specific module?
31
votes
6answers
52k views

Get all nodes of given type

I would like to get all nodes that are of my_custom_type type in Drupal 8. I know I can get all the nodes (of any type) with \Drupal\node\Entity\Node::loadMultiple() and the list of all types by \...
31
votes
4answers
72k views

Get path to theme assets in Twig template

I have a question about getting a path to an image in a Twig template. The image is not assigned to a field or something. Just a static image which is stored in "MYTHEME/image/icon/my-icon.png". In ...
30
votes
8answers
52k views

Iterate through multiple value content field in Twig template

I need to take control over the rendering of a field_admin_tags field in a node.html.twig template. This WORKS: {{ content.field_admin_tags }} — Renders everything (label + all field values) {{ ...
30
votes
4answers
21k views

How do I re-run updates (change module schema version)?

I'm working on a module, and I changed a couple field types in the schema. I didn't take a backup before testing it and messed up the DB (it's just a dev site). Anyway, I reinstalled everything, and ...
30
votes
4answers
29k views

How do I render nodes, now that node_view() has been deprecated?

In Drupal 7 I frequently use node_view() for rendering nodes (using view modes) in blocks or pages as follows: $nids = array(123,456,789); $nodes = node_load_multiple($nids); foreach ($nodes as $node)...
30
votes
1answer
27k views

How can I get the roles for the currently logged-in user?

How can I get the roles for the currently logged-in user, in Drupal 8? In Drupal 7, it could be achieved by accessing $GLOBALS['user']->roles;.
29
votes
8answers
65k views

How do I add a custom validation handler to an existing form/field?

How do I add a custom validation handler to an existing form (or form field) in Drupal 8? I have a form that I haven't created. I want to add my own validation rules on some fields when the form is ...
29
votes
7answers
30k views

How do I correctly setup caching for my custom block showing content depending on the current node?

I have this very basic block which just shows the current node's ID. <?php /** * @file * Contains \Drupal\mymodule\Plugin\Block\ExampleEmptyBlock. */ namespace Drupal\mymodule\Plugin\Block; ...
29
votes
5answers
32k views

Load term by name

In Drupal 7, we can load the term using name for ex. taxonomy_get_term_by_name($name) Is there any way to load term via given name in Drupal 8?
29
votes
4answers
28k views

How do I export/import views?

I know how to do it in Drupal 6/7, but I cannot find where to export/import views in Drupal 8. From which admin page is possible to do it, in Drupal 8?
29
votes
8answers
11k views

How do I migrate block content from a dev to a production site?

I've finally started looking at Drupal 8 seriously and I'm particularly interested in the configuration management. I've come across something that could be a little bit problematic and that's ...
28
votes
3answers
53k views

Programatically render a block in a twig template

I need to render a views block in my page.html.twig template. In D7 I would do this: <?php $block = module_invoke('module_name', 'block_view', 'block_delta'); print render($block['content']); ?...
28
votes
2answers
22k views

How can I check if a module is enabled?

In Drupal 7, you can use module_exists() to check whether a module is enabled (as well as whether it exists). For example, if (module_exists('devel')) { How can you check whether a module is ...
28
votes
4answers
46k views

Programmatically update an entity reference field

I know I can update (or set a value for) an entity reference field in Drupal 7 with code similar to the following. $node['field_code_used_by'][LANGUAGE_NONE][0]['target_id'] = $id; I want to ...
28
votes
11answers
7k views

How to prevent Devel module to be installed on production environments

Using the new Drupal 8 Configuration manager, how can I prevent it from installing the Devel module on certain environments? As far as I know, installing it on my local means the next time I export ...
27
votes
3answers
64k views

Add a custom submission handler to a form

How can I add a custom form submission handler? I tried adding $form['#submit'][] = 'mymodule_form_submit'; or $form['actions']['submit']['#submit'][] = 'mymodule_form_submit'; to hook_form_alter(). ...
27
votes
3answers
7k views

How can I programmatically change the active theme?

How can I programmatically change the active Drupal 8 theme? In Drupal 6, we used the following code. global $custom_theme; $custom_theme = 'garland'; In Drupal 7, we used hook_custom_theme(). In ...
26
votes
10answers
59k views

Get taxonomy terms

I wanted to retrieve taxonomy terms from a certain vocabulary in Drupal 8. Apparently I can still do it using taxonomy_get_tree but it's deprecated. I now have to use TermStorageInterface::loadTree ...
26
votes
6answers
19k views

How do I alter the behavior of the form fields contained within the paragraph field?

Using the Paragraphs module in Drupal 8, I am attempting to alter the behavior of the form fields contained within the paragraph field. This is so I can add behavior like AJAX callbacks, hide show ...
25
votes
5answers
43k views

How do I programmatically render a view with contextual filters?

How do I programmatically render a view with contextual filters in Drupal 8? In Drupal 7, I generally use the following code. $view = views_get_view('test_view'); //test_view is the view machine ...

1
2 3 4 5
318