New template crudEAVWithFile and improve fileEAVAttribute

templates/crudEAVWithFile/.no-copied-config/after-generate-info.txt

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+1. Add your STATIC fields on:
+
+    ${Vendorname}/${Modulename}/Setup/InstallSchema.php
+
+2. Add ENTITY EAV Attributes on:
+
+    ${Vendorname}/${Modulename}/Setup/${Entityname}Setup.php
+
+3. Add your custom columns to the grid:
+
+    ${Vendorname}/${Modulename}/view/adminhtml/ui_component/${vendorname}_${modulename}_${entityname}_listing.xml
+
+4. Add your custom fields to the form:
+
+    ${Vendorname}/${Modulename}/view/adminhtml/ui_component/${vendorname}_${modulename}_${entityname}_form.xml
+
+5. Add Attributes to display in Grid on the Listing DataProvider:
+
+    ${Vendorname}\${Modulename}\Ui\Component\Listing\DataProvider
+
+    /**
+     * @param SearchResultInterface $searchResult
+     * @return array
+     */
+    protected function searchResultToOutput(SearchResultInterface $searchResult)
+    {
+        $searchResult->setStoreId($this->request->getParam('store', 0))
+            ->addAttributeToSelect([]); // Add here needed EAV attributes to display on grid
+
+        return parent::searchResultToOutput($searchResult);
+    }
+
+6. Set the Admin Menu tab where you want your Module can be found:
+
+    ${Vendorname}/${Modulename}/etc/adminhtml/menu.xml
+
+7. Set From server side Validations:
+
+    ${Vendorname}\${Modulename}\Controller\Adminhtml\${Entityname}\Validate:
+
+    /**
+     * Check if required fields is not empty
+     *
+     * @param array $data
+     */
+    public function validateRequireEntries(array $data)
+    {
+        $requiredFields = [
+            'identifier' => __('${Entityname} Identifier'),
+        ];
+
+        //...
+    }

templates/crudEAVWithFile/.no-copied-config/config.yml

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+dependencies:
+  0: crudEAV
+  1: fileEAVAttribute
+  2: fileProcessor

templates/crudEAVWithFile/.no-copied-config/description.txt

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+This Template creates an EAV crud module using uiComponents for Grid and Form. It includes a file attribute

templates/fileEAVAttribute/Controller/Adminhtml/${Entityname}/Save.php

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+<?php
+/**
+ * Save
+ *
+ * @copyright Copyright © ${commentsYear} ${CommentsCompanyName}. All rights reserved.
+ * @author    ${commentsUserEmail}
+ */
+namespace ${Vendorname}\${Modulename}\Controller\Adminhtml\${Entityname};
+
+use Magento\Backend\App\Action;
+use Magento\Backend\App\Action\Context;
+use ${Vendorname}\${Modulename}\Model\${Entityname}Factory;
+
+class Save extends Action
+{
+    /** @var ${Entityname}Factory $objectFactory */
+    protected $objectFactory;
+
+    /**
+     * @param Context $context
+     * @param ${Entityname}Factory $objectFactory
+     */
+    public function __construct(
+        Context $context,
+        ${Entityname}Factory $objectFactory
+    ) {
+        $this->objectFactory = $objectFactory;
+        parent::__construct($context);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function _isAllowed()
+    {
+        return $this->_authorization->isAllowed('${Vendorname}_${Modulename}::${entityname}');
+    }
+
+    /**
+     * Save action
+     *
+     * @return \Magento\Framework\Controller\ResultInterface
+     */
+    public function execute()
+    {
+        $storeId = (int)$this->getRequest()->getParam('store_id');
+        $data = $this->getRequest()->getParams();
+        /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
+        $resultRedirect = $this->resultRedirectFactory->create();
+        if ($data) {
+            $params = [];
+            $objectInstance = $this->objectFactory->create();
+            $objectInstance->setStoreId($storeId);
+            $params['store'] = $storeId;
+            if (empty($data['entity_id'])) {
+                $data['entity_id'] = null;
+            } else {
+                $objectInstance->load($data['entity_id']);
+                $params['entity_id'] = $data['entity_id'];
+            }
+            $this->${fileattributename}Preprocessing($data);
+            $objectInstance->addData($data);
+
+            $this->_eventManager->dispatch(
+                '${vendorname}_${modulename}_${entityname}_prepare_save',
+                ['object' => $this->objectFactory, 'request' => $this->getRequest()]
+            );
+
+            try {
+                $objectInstance->save();
+                $this->messageManager->addSuccessMessage(__('You saved this record.'));
+                $this->_getSession()->setFormData(false);
+                if ($this->getRequest()->getParam('back')) {
+                    $params['entity_id'] = $objectInstance->getId();
+                    $params['_current'] = true;
+                    return $resultRedirect->setPath('*/*/edit', $params);
+                }
+                return $resultRedirect->setPath('*/*/');
+            } catch (\Exception $e) {
+                $this->messageManager->addErrorMessage($e->getMessage());
+                $this->messageManager->addExceptionMessage($e, __('Something went wrong while saving the record.'));
+            }
+
+            $this->_getSession()->setFormData($this->getRequest()->getPostValue());
+            return $resultRedirect->setPath('*/*/edit', $params);
+        }
+        return $resultRedirect->setPath('*/*/');
+    }
+
+    /**
+     * ${Fileattributename} data preprocessing
+     *
+     * @param array $data
+     *
+     * @return array
+     */
+    protected function ${fileattributename}Preprocessing(&$data)
+    {
+        if (empty($data['${fileattributename}'])) {
+            unset($data['${fileattributename}']);
+            $data['${fileattributename}']['delete'] = true;
+        }
+    }
+
+}