Set error drupal

set error drupal

To turn on the “Error Messages to Display”, go to the Administration menu, then go into Configuration > Development > Logging and errors (/admin. public function FormState::setError. public FormState::setError(array &$element, $message = ''). Flags an element as having an error. Set Drupal to show all errors when developing your module. Some errors are only reported when all PHP error reporting is switched on.

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Drupal 8: Solved ! The website encountered an unexpected error. Please try again later.

PHP Drupal\Core\Form FormStateInterface::setError Set error drupal /** * Form element validation handler for #type 'number'. * * Note that #required is validated by _form_validate() already. */ public static function validateNumber(&$element, FormStateInterface $form_state, &$complete_form) { $value = $element['#value']; if ($value === '') { error invalid function or declaration return; } $name = empty($element['#title']) ? $element['#parents'][0] : $element['#title']; // Ensure the input is numeric. if (!is_numeric($value)) { $form_state->setError($element, t('%name must be a number.', array('%name' => $name))); return; } // Ensure that the input is greater than the #min property, set error drupal, if set. if (isset($element['#min']) && $value < $element['#min']) { $form_state->setError($element, t('%name must be higher than or equal to %min.', array('%name' => $name, '%min' => $element['#min']))); } // Ensure that the input is less than the #max property, set error drupal, if set. if (isset($element['#max']) && $value > $element['#max']) { $form_state->setError($element, t('%name must be lower than or equal to %max.', set error drupal, array('%name' => $name, '%max' => $element['#max']))); } if (isset($element['#step']) && strtolower($element['#step']) != 'any') { // Check that the input is an allowed multiple of #step (offset by #min if // #min is set). set error drupal $offset = isset($element['#min']) ? $element['#min'] : 0.0; if (!NumberUtility::validStep($value, $element['#step'], $offset)) { $form_state->setError($element, t('%name is not a valid number.', array('%name' => $name))); } } }

Have you seen an error message in a Drupal site like this?

When you are building or modifying a Drupal site, set error drupal, the set error drupal above can sometimes appear and catch us in unexpected situations, but there is nothing much you can do. “Try again later” is not going to help. What will you do?

There is not much you can do about it, because there is not enough information to go further. By default, Drupal is configured not to display error messages. To find out what caused the errors, the error message display options require to be turned on first.

In this tutorial, you’ll learn how to turn on error display to help you debug.

WARNING: It’s important not to display error messages on a production site. The error messages could display sensitive information such as paths or server level user accounts.

How to Display Errors

To turn on the “Error Messages to Display”, go to the Administration menu, then go into Configuration > Development > Logging and errors (/admin/config/development/logging).

You will find the following configuration. There are 4 options available, and the default setting is “None”.

The 4 options are:


None is the default. Drupal will not display error messages. That’s why there is only very limited error information displayed.

Errors and warnings

Display both errors and warnings

All messages

Display all messages

All messages, with backtrace information

Display all messages, including a backtrace of all the functions that the system has gone through before the error

Turning on the other options, Drupal will display more error messages, set error drupal. The following is another example of error messages after turning on “All messages, with backtrace information”:

When more information is error 001 expected token, but found ], it’s easier to isolate, test and identify what really caused the errors. Compared with the first error screen above, this one makes much more sense to start with. We are not going into the individual errors here. This is probably the first step to handle unknown error messages, set error drupal. Even though sometimes we need help from other people, this more detailed information is still necessary for them to follow up.

Recent Log Messages

In addition to the error screen, there is an area “Recent Log Messages” we can look into if the site is still working.

To go into this area, set error drupal, go to Administration Menu, go to Error creating file system cannot run mkfs > Recent log messages (./admin/reports/dblog),

A list of recent log messages can be found here. Following is an example:

By clicking on the individual log, more details of that error message will be displayed. Below is an example.


Next time when we come across a run-time error, we can analyze what changes have been made, see if the errors are repeating, and see if things can be reversed.

In addition, turning on these error message displays to provide us more information, particularly a backtrace of the functions Drupal was executing, and set error drupal other log messages are additional steps we can take.

Even though we might need assistance from other people, this information is still important to them.

We hope these simple steps will be helpful in problem-solving, which sometimes can be very time-consuming.

How do I create custom validation for a form in Drupal?

Step 1: In order to create a custom form validation, you should use the “Field Validation” Drupal module, which you could download via the following link:

Step 2: The installation of the module is pretty simple – you could do this by navigating to your Drupal administrative panel > Modules > Install new module and either paste the provided URL or download the archive file and upload it via the displayed form in “Install new module” section.
Step 3: After the above has been done, you could add a custom field validation easily.
Step 4: Usually it will display a custom error message when you attempt to add an article title, which is already used in your Drupal website. This can be done by navigating to your administrative panel > Structure > Property validation > Add.
Step 5: Next, you should enter the set error drupal “Name”, “Rule name”, “Entity type”, “Bundle name”, “Property name” and “Validator”.
Step 6: Finally you have to enter a custom error message into the appropriate field and click the “Save” button.
Step 7: Now, you may proceed to adding a new article with name “Hosting title” via administrative panel > Content > Add content. Now when you attempt to add another article with the same name, the following message appears “ message: You already have article with the same title.”
Step 8: That’s it! Your custom validation form set error drupal been created successfully.

Related Articles

Using FormState::setError() in Form::submitForm()

I am writing a form in Drupal 8 that provides user values to a web service, which will either act on them or send back an error.

How can I display that error message to the user?

Here's the situation in code:

Drupal treats 'validate' and 'submit' as two separate steps, but the web service doesn't. The only way to determine if the values are fully 'valid' is to get the web service to look at them, which is an operation that potentially has side effects.

and other form validation handlers are not supposed to contain business logic, since they may get called multiple times during the life of the form, particularly if AJAX is involved, set error drupal.

However, all errors are meant to be resolved before and any other submission handlers are called. enforces this by throwing a if you try to create any. Also, submitForm() clears away the user's values, and the next page builds the form from scratch.

I've seen this similar question for Drupal 7. Back then, it was possible (if discouraged and ugly) to use in the submit handler or the form builder. As far as I can tell, that flat-out doesn't work in Drupal 8.

How am I supposed to interact with RESTful web services? Is there a way to pass errors up from a form submit handler? Or is there a way to ensure a validation handler runs once, only once, and only if all other validation passes? Or is there some way to nokia pc suite error code 2203 this with multi-step forms?

Drupal 8: Inline Form Errors

HTML forms are among the most important and integral parts of the world wide web. Since the beginning of the web, forms have been everywhere, aiding user interactions—users fill in their data and submit it to the server, which in turn validates the data and processes it at the next level (for example, saving data to the database).

Forms help web applications get user input in a pre-defined manner. To control the user input, web applications use form validations, which throw error messages if end-users do not supply data in the pre-defined format, forcing them to re-fill the data.

Drupal has a beautiful Form API which helps developers build, validate and process forms, as well set error drupal the submitted data.

Here, we’ll be talking about form validation errors in Drupal 8.

Drupal 8 Default Form Errors

The default form validation error in Drupal 8 looks like the screengrab below.


You could say that the way default errors are displayed to end-users is simple and elegant—all the error messages are visible at the top of page. But these error messages are not always easily readable to end-users.

The Problem With Default Form Errors

In the screenshot above—what if there were 20 elements and 20 errors?

  • The end-user would have a hard time relating the error to the appropriate element.
  • What if the user set error drupal errors while operating from a smaller viewport? This creates more problems.

There are many cases of such problems occurring while working with out-of-the-box form errors.

However, set error drupal, with every problem comes a solution. And Drupal gives us Inline Form Errors as an solution.

Inline Form Errors

To overcome these problems, Drupal 8 Core provides a module known as Inline Form Errors (IFE).

The purpose of this module is to show server-side form validation errors underneath the corresponding element, thereby improving usability and accessibility.


By default, this module is disabled. So you need to go to the /admin/modules path and install the module.


Errors After Installing IFE

Once you have enabled the module, validation errors on any form will appear underneath the respective form elements.


In the screengrab above, we can see two aspects of the validation errors:

  • Errors: These are present under each element. This makes errors easily readable against each element.
  • Summary: The red bar at the top summarizing the number of errors also contains hyperlinks to each element which has errors, set error drupal. When the user clicks any link in this area, the UI automatically scrolls to the element that the hyperlink points to. This makes error navigation easy.

Just by enabling the module, our form error navigation got much better. This is the power that Drupal gives us.

Disable IFE For a particular Form

Starting with Drupal 8.5.1, it’s now possible to disable inline form errors for specific forms (only applicable when the Inline Form Errors module is enabled). To do so, we need to use the Form API and add the following to the form definition:

$form['#disable_inline_form_errors'] = TRUE;

That’s it! This line tells Drupal to use the default error style for that specific form.

Example Module Showcasing IFE

The screenshots we saw above are grabbed from a custom path (/ife-demo) in a custom module (ife_demo), set error drupal, for which you can find the source code here.

Important Notes on IFE

While working with IFE, do take note of the following:

  • IFE works with server side errors only.
  • Due to HTML5, any #required input elements will first get validated by the browser, after which the server will validate other business logic.
  • Not all #required elements are validated by HTML5. Hence, they will go to the server for #required validation as well (for example: “#type” => “checkboxes”).
  • The styling of inline form errors might vary across elements. Make sure you unit test your forms well before passing them on for quality checks.

This module is very useful, especially on sites which have large forms. Some examples of such forms would be user registration forms, shopping cart and checkout forms, entity add/edit forms, etc. For developers, Inline Form Errors is a step towards more user-friendly forms.

I hope you enjoyed this post and got some insights regarding Inline Form Errors! Do share your thoughts below.

Handling Errors in Complex Drupal Form Validation

Recently, I have been working on a site with a big multi-step form that is using a lot of custom form elements, custom auto-completes, custom form api states and ajax based sub-forms, set error drupal. It is all built using Drupal form api. The best thing about this form is that all the fields and sub-forms map to a data model.

by jibran.ijaz /

This gives us the benefit of validating the form fields using the Symfony validation component, set error drupal. This is good because we can write all the validation separately and test it using phpunit without bootstrapping Drupal. To convert this data model into form fields we wrote a form factory and connected it all together using the service container module.

Whenever you are working with complex multistep forms and updating a sub-form based on user input then you can't exactly show the form errors in the order in which the fields appeared on the form. In this post I'll explain a process in which we can achieve just that - keeping the set error drupal error messages in the same order as the form fields.

In short, the workflow is:

  • initiate the form factory;
  • create a model object;
  • pass the model object to the form factory, which derives the form API fields; and
  • show the form

After form submission the error create bitmap is:

  • hydrate the model objects from user input; and
  • validate the objects using Symfony validation component.
  • If there are errors set the form errors else store objects in local storage.

This was all working nicely but the problem was that all the validation errors were showing in the order they are validated not in the order in which they are displayed on the form. For most of the fields it was working correctly but when the mutli-value custom form elements were autocad internal error [email protected] eoutofrange the order of all the single value field errors were inconsistent with the order on the form. The reason was that the multi-value fields were loaded using ajax and were validated after the single value fields. This was a poor experience from a usability point of view. One way of fixing this problem was by using inline form errors but we didn't want to go down that road. Another way to fix this is to psexec error 1 the form errors according set error drupal fields weight in the form after all the errors are set.

There is a function which returns all the errors of the form keyed by their string version of key of the element. The solution was simple, get all the errors recursively parse through all the sorted fapi elements in and create a new list of errors and set them again. I added a new custom validator to all the steps because we have the complete form with all the fields in the validator and as it was the last validator all the form errors were already set.

The original idea of this code was taken from

In closing

We have plans to port our form factory code to Drupal 8 and release as a contrib module. We've found decoupling our model objects from Drupal makes it much easier to test business logic and allows for rapid iteration with a focus on maximum business value.


Drupal 7, Form API, Symfony, PHP Unit, validation, Service container

Photo of jibran.ijaz

Posted byjibran.ijaz
Senior Drupal Developer