Pass the Adobe Adobe Commerce AD0-E716 Questions and answers with CertsForce

When you disable a module, Magento removes all of its declarative schema changes from the database the next time you run bin/magento setup:upgrade."

This means that when the developer disables the module and runs setup:upgrade, Adobe Commerce will automatically handle the removal of the database table created by the module's declarative schema.

For reference, here are some key points from the documentation:

[Disable a Module](https://x.com/i/grok?text=Disable%20a%20Module) - This section explains how Magento handles the database schema when a module is disabled.

Declarative Schema Configuration - Provides an overview of how declarative schema works, including its behavior when modules are disabled or uninstalled.

Therefore, based on the official Adobe Commerce documentation, the correct action for the developer is to do nothing further beyond disabling the module and running bin/magento setup:upgrade. Magento will take care of removing the table associated with the module as part of its schema management process.

The developer can add a custom filter to the virtual type Magento\Catalog\Model\Api\SearchCriteria\CollectionProcessor\ProductFilterProce5sor for supplier_id field. In the custom filter, the developer can apply the needed join and filter to the passed $collection. This is the recommended way to extend the search criteria for products using dependency injection and plugins. Verified References: [Magento 2.4 DevDocs] [Magento Stack Exchange]

In Adobe Commerce, when you need to add a custom filter for a non-EAV attribute stored in a standalone table, the most maintainable approach is to create a custom filter for ProductFilterProcessor. This processor allows for customized search criteria handling, which can be extended to include custom joins and filters without altering core functionality or relying on plugins and observers.

Why Custom Filter in ProductFilterProcessor is Preferred:

The ProductFilterProcessor within SearchCriteria\CollectionProcessor is specifically designed to handle filtering of product collections. By extending this with a custom filter, the developer can implement joins and filters on standalone tables.

This approach is modular and reusable, allowing any code that utilizes ProductRepositoryInterface to apply the supplier_id filter seamlessly.

Implementation of Custom Filter:

Define a custom filter class that implements the required logic to join the standalone table and apply the supplier_id filter.

Register this custom filter with a virtual type in di.xml for ProductFilterProcessor, so it can process the supplier_id as part of the search criteria.

Why Options A and C are Less Suitable:

Option A relies on an event observer, which is less modular and may have performance implications since it requires listening to every product collection load event.

Option C, while functional, involves modifying CollectionProcessorInterface::process(), which is more generic and not specifically tailored for product collection filtering.

References:

Magento Developer Documentation on Using Custom Filters in CollectionProcessor

Magento DevDocs on Dependency Injection and Virtual Types

The developer can extend the existing CartltemPrices GraphQL schema to include a custom base_price field by adding the following code to the module’s etc/schema.graphqls file:

extend type CartltemPrices { base_price: Money! @doc(description: “The base price of the cart item”) }

This code adds a new field called base_price to the CartltemPrices type and specifies that it is of type Money and it is not nullable. The @doc directive adds a description for the field that will be shown in the schema documentation. The developer also needs to create a custom resolver class for the base_price field and declare it in the di.xml file of the module. Verified References: [Magento 2.4 DevDocs] [Magento Stack Exchange]

Magento Integration Test Fixtures:

Integration tests in Magento often require test data to be set up using fixtures.

Fixtures are typically PHP scripts placed within a _files directory, which Magento looks for based on the module structure and path specified in the annotation.

Directory Structure for Module-Specific Fixtures:

The correct approach is to create the fixture within the module’s own directory. The path follows: [module dir]/Test/Integration/_files/.

By placing it within the module directory, the fixture remains encapsulated and portable with the module itself.

Annotation Usage in Option A:

The @magentoDataFixture annotation specifies the path relative to the module directory.

In this case, using MyVendor_MyModule::Test/Integration/_files/my_fixture.php tells Magento to look within the module’s integration test folder, ensuring modularity and easier maintenance.

Why Other Options Are Incorrect:

Option B: Storing fixtures in [magento root dir]/dev/tests/integration/testsuite/ is an older approach and does not follow module encapsulation best practices. It is better suited for Magento core modules rather than custom modules.

Option C: This option uses a similar path structure to Option A, but the provided annotation format lacks proper naming convention. It misses the proper path specification that is necessary for Magento to resolve the fixture correctly.

References:

Magento Integration Testing Best Practices - Overview of writing integration tests and using fixtures.

@magentoDataFixture Annotation Guide - Details on using @magentoDataFixture annotations for setting up test data.

By following the guidelines in Option A, the developer ensures that the test fixture is module-scoped, making it easier to manage, reuse, and transport with the module code.

The Content Security Policy (CSP) in Adobe Commerce (Magento) restricts the types of content that can be loaded on a page to protect against malicious attacks, such as cross-site scripting (XSS). When an iframe is added, and a JavaScript library is loaded from an external source, these resources must be whitelisted explicitly using the csp_whitelist.xml file.

In this specific case:

The frame-src directive controls the sources from which iframes can be embedded. Since the developer is embedding an iframe from an external domain, they need to whitelist this domain for frame-src.

The script-src directive controls the sources from which JavaScript files can be loaded. The external JavaScript library must be whitelisted under script-src to allow it to execute.

Therefore, the correct policy IDs to whitelist are:

frame-src: to allow the embedding of content from an external domain in an iframe.

script-src: to allow the loading and execution of JavaScript files from the external domain.

Here’s how to update the csp_whitelist.xml file with the correct directives:

Replace your-external-domain.com with the actual domain of the external iframe and JavaScript source.

Additional Resources:

Adobe Commerce Developer Guide: Content Security Policy (CSP)

CSP Policies and Directives: Explanation of all supported CSP directives and how to configure them.

The correct answers are A and C.

The errors in the snippet are:

Column roll_no does not have an index. It is needed since attribute_identity is set to true.

Column student_name does not have an attribute length.

The attribute_identity attribute specifies whether the primary key of the table should be auto-incremented. If attribute_identity is set to true, then the roll_no column must have an index. The student_name column does not have an attribute length, which is required for string columns.

The following code shows how to fix the errors:

XML

<title name="vendor_module_table">

int

true

true

false

int

false

true

false

true

true

string

255

false

</title>

Once the errors have been fixed, the table can be created successfully.

The variable env: composer_auth is located in the Project variables section in the Project Web Interface. This variable is used to store the authentication credentials for Composer repositories that require access keys or tokens. The developer can set this variable at the project level to apply it to all environments, or override it at the environment level if needed. Verified References: [Magento 2.4 DevDocs] 2

The correct answer is Option A. This approach uses two filter groups to correctly implement the logic from the SQL query using Magento's SearchCriteria API.

Understanding the Logic: The given SQL query contains two main conditions:

featured = 1 AND logo_image IS NOT NULL (grouped together with an AND condition)

enabled = 1

In the Magento SearchCriteria terms, these translate to:

Filter Group 1: featured = 1 AND logo_image IS NOT NULL

Filter Group 2: enabled = 1

The two filter groups are then combined using an implicit AND condition.

Magento's SearchCriteria Structure: The SearchCriteria object is the recommended way in Magento 2 to filter and retrieve collections with complex conditions.

Filter Groups: Used to group filters together. All filters within a filter group are combined with an AND condition.

Filters: Define a condition for a single field.

Explanation of the Code for Option A:

Filter 1 is created for the featured field, set to 1 with an eq condition type.

Filter 2 is created for the logo_image field, with a notnull condition type.

Both Filter 1 and Filter 2 are combined into Filter Group 1, which applies an AND condition between these filters.

Filter 3 is created for the enabled field, set to 1 with an eq condition type.

Filter Group 2 contains only Filter 3.

Finally, both filter groups are set on the SearchCriteria object. By default, the SearchCriteria combines filter groups using an AND condition between them.

Why Option A is Correct: Option A uses two filter groups that exactly match the desired SQL query logic:

It correctly combines featured and logo_image in an AND condition.

It then checks if enabled is 1, which is handled by the second filter group.

References:

Search Criteria Builder - This Adobe Commerce documentation page explains how to create and use the SearchCriteriaBuilder.

Filter Groups and Conditions - Provides an overview of how to structure filter groups and conditions in SearchCriteria.

Magento 2 APIs - The general documentation for working with Magento 2 APIs, including SearchCriteria.

This approach is the standard method in Adobe Commerce to replicate complex SQL queries using SearchCriteria with multiple filter groups and conditions.

To add file upload validation for a custom form field in the Adobe Commerce admin panel, which should restrict the file type to .pdf and limit the file size to 2 MB, the recommended approach is to include the validation parameters directly within the node in the form’s XML configuration. This ensures that the validation occurs on the client-side as well as server-side, providing immediate feedback to users before submission.

Option C is correct for the following reasons:

Adding Validation Inside <settings>:By placing the <allowedExtensions> and tags within the node of the XML configuration, the system will enforce these restrictions directly within the form component. This method leverages Magento’s built-in support for validation settings, which ensures that only files matching the specified criteria (.pdf files of 2 MB or smaller) are accepted by the form.

Explanation: Magento UI components allow for client-side validation through the node, where attributes such as allowedExtensions and maxFileSize are used to control file upload constraints. This approach not only validates the file size and type but also integrates seamlessly with Magento’s front-end validation mechanisms.

References: Magento’s documentation on UI components highlights how to enforce file type and size restrictions through XML configurations within , making it the standard and most efficient solution for this task.

Alternatives and Limitations:

Option A: Adding validation within the controller (UploadPdf) can provide additional server-side validation, but this does not prevent the user from selecting invalid files in the first place. Server-side validation alone lacks the user experience enhancement provided by client-side feedback.

Option B: Configuring a virtual type in di.xml for validation (e.g., setting allowedExtensions and maxFileSize within a custom uploader model) is effective for backend processing but is not as straightforward for direct form validation within the admin UI. It complicates the implementation by requiring custom backend logic where native XML validation can suffice.

Option C provides a straightforward, maintainable, and user-friendly way to implement file validation directly in the form configuration. It reduces the need for custom controller or model logic and leverages Magento’s built-in form handling capabilities.

In Adobe Commerce, to retrieve custom extension attributes on an entity such as a quote, you need to ensure that these attributes are properly loaded when accessing the entity directly via repository interfaces. When fetching a single quote, it is essential to use a plugin on CartRepositoryInterface::get to include the extension attributes as this method is responsible for loading individual quote data.

If the plugin is missing for the get method, the extension attributes won’t be loaded for single quote retrieval, leading to their absence in the result.

Additional Resources:

Adobe Commerce Developer Guide: Extension Attributes

Magento 2 Repositories and Plugins