Use system value on depends field with required value

[thomas-kl1]

I didn't found any related issues in your backlog, if it actually already exists, my apologies.

## Unhanded event when the "Use system value" is triggered in the store configuration admin interface.

Preconditions

1. Magento 2.4-develop
2. Custom configuration as following (simplified) in system.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <section id="system">
            <group id="my_custom_settings" translate="label" sortOrder="25" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>My Custom Settings</label>
                <field id="custom_field_disable" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                    <label>Disable Button</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
                <field id="custom_field_value" translate="label" type="select" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>Select Field</label>
                    <source_model>Vendor\Module\Model\Config\Source\MyOptions</source_model><!-- return empty array or first value is empty -->
                    <can_be_empty>0</can_be_empty>
                    <validate>required-entry</validate>
                    <depends>
                        <field id="custom_field_disable">0</field>
                    </depends>
                </field>
            </group>
        </section>
    </system>
</config>

3. Default configuration values in the config.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
    <default>
        <system>
            <my_custom_settings>
                <custom_field_disable>1</custom_field_disable>
            </my_custom_settings>
        </system>
    </default>
</config>

Steps to reproduce

1. Add above content in the system.xml and config.xml of a custom module
2. Clear the cache
3. Go to store > config > Advanced > System > My Custom Settings
4. Uncheck "Use system value" of the "Disable Button" field
5. Check value "Yes"
6. "Select Field" field appear, (do not select any value)
7. Check "Use system value" of the "Disable Button" field

Expected result

1. The depends fields should disappears
2. We are able to save the config

Actual result

1. Depends fields are still visibles
2. Can't save because the "Select Field" is required
   

Workaround

3. Select manually the value of the first field

[m2-assistant]

Hi @vivekkumarcedcoss. Thank you for working on this issue.
Looks like this issue is already verified and confirmed. But if you want to validate it one more time, please, go though the following instruction:

• 1. Add/Edit Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 2. Verify that the issue is reproducible on 2.3-develop branch

  Details

  - Add the comment @magento-engcom-team give me 2.3-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.3-develop branch, please, add the label Reproduced on 2.3.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 3. Verify that the issue is reproducible on 2.2-develop branch.

  Details

  - Add the comment @magento-engcom-team give me 2.2-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.2-develop branch, please add the label Reproduced on 2.2.x

• 4. If the issue is not relevant or is not reproducible any more, feel free to close it.