Magento2 Import – Products Attribute and Attribute Sets

I've done this to export all attributes and their options (if it is a dropdown attribute) from the source website:

exportAttributes.php in root directory of source website:

<?php
define('MAGENTO', realpath(dirname(__FILE__)));
require_once MAGENTO . '/app/Mage.php';
Mage::app();
$entity_type_id = Mage::getModel('catalog/product')->getResource()->getTypeId();

prepareCollection($entity_type_id);

function prepareCollection($ent_type_id){
    $resource = Mage::getSingleton('core/resource');
    $connection = $resource->getConnection('core_read');
    $select_attribs = $connection->select()
            ->from(array('ea'=>$resource->getTableName('eav/attribute')))
            ->join(array('c_ea'=>$resource->getTableName('catalog/eav_attribute')), 'ea.attribute_id = c_ea.attribute_id');
            // ->join(array('e_ao'=>$resource->getTableName('eav/attribute_option'), array('option_id')), 'c_ea.attribute_id = e_ao.attribute_id')
            // ->join(array('e_aov'=>$resource->getTableName('eav/attribute_option_value'), array('value')), 'e_ao.option_id = e_aov.option_id and store_id = 0')
    $select_prod_attribs = $select_attribs->where('ea.entity_type_id = '.$ent_type_id)
                                            ->order('ea.attribute_id ASC');

    $product_attributes = $connection->fetchAll($select_prod_attribs);

    $select_attrib_option = $select_attribs
                                ->join(array('e_ao'=>$resource->getTableName('eav/attribute_option'), array('option_id')), 'c_ea.attribute_id = e_ao.attribute_id')
                                ->join(array('e_aov'=>$resource->getTableName('eav/attribute_option_value'), array('value')), 'e_ao.option_id = e_aov.option_id and store_id = 0')
                                ->order('e_ao.attribute_id ASC');

    $product_attribute_options = $connection->fetchAll($select_attrib_option);

    $attributesCollection = mergeCollections($product_attributes, $product_attribute_options);
    prepareCsv($attributesCollection);

}

function mergeCollections($product_attributes, $product_attribute_options){

    foreach($product_attributes as $key => $_prodAttrib){
        $values = array();
        $attribId = $_prodAttrib['attribute_id'];
        foreach($product_attribute_options as $pao){
            if($pao['attribute_id'] == $attribId){
                $values[] = $pao['value'];
            }
        }
        if(count($values) > 0){
            $values = implode(";", $values);
            $product_attributes[$key]['_options'] = $values;
        }
        else{
            $product_attributes[$key]['_options'] = "";
        }
        /*
            temp
        */
        $product_attributes[$key]['attribute_code'] = $product_attributes[$key]['attribute_code'];
    }

    return $product_attributes;

}

function prepareCsv($attributesCollection, $filename = "importAttrib.csv", $delimiter = '|', $enclosure = '"'){

    $f = fopen('php://memory', 'w');
    $first = true;
    foreach ($attributesCollection as $line) {
        if($first){
            $titles = array();
            foreach($line as $field => $val){
                $titles[] = $field;
            }
            fputcsv($f, $titles, $delimiter, $enclosure);
            $first = false;
        }
        fputcsv($f, $line, $delimiter, $enclosure); 
    }
    fseek($f, 0);
    header('Content-Type: application/csv');
    header('Content-Disposition: attachement; filename="'.$filename.'"');
    fpassthru($f);
}

This will give a csv file [actually i used "|" to separate ;)] paste this csv file in MAGENTO_ROOT/attribImport directory of the destination website, i.e. website to which attributes need to be imported:

now put the following code in MAGENTO_ROOT/attribImport** directory of the destination website

<?php
define('MAGENTO', realpath(dirname(__FILE__)));
require_once MAGENTO . '/../app/Mage.php';
Mage::app();
// $fileName = MAGENTO . '/var/import/importAttrib.csv';
$fileName = 'importAttrib.csv';
// getCsv($fileName);
getAttributeCsv($fileName);

function getAttributeCsv($fileName){
    // $csv = array_map("str_getcsv", file($fileName,FILE_SKIP_EMPTY_LINES));
    $file = fopen($fileName,"r");
    while(!feof($file)){
        $csv[] = fgetcsv($file, 0, '|');
    }
    $keys = array_shift($csv);
    foreach ($csv as $i=>$row) {
        $csv[$i] = array_combine($keys, $row);
    }
    foreach($csv as $row){
        $labelText = $row['frontend_label'];
        $attributeCode = $row['attribute_code'];
        if($row['_options'] != "")
            $options = explode(";", $row['_options']); // add this to createAttribute parameters and call "addAttributeValue" function.
        else
            $options = -1;
        if($row['apply_to'] != "")
            $productTypes = explode(",", $row['apply_to']);
        else
            $productTypes = -1;
        unset($row['frontend_label'], $row['attribute_code'], $row['_options'], $row['apply_to'], $row['attribute_id'], $row['entity_type_id'], $row['search_weight']);
        createAttribute($labelText, $attributeCode, $row, $productTypes, -1, $options);
    }
}


/**
 * Create an attribute.
 *
 * For reference, see Mage_Adminhtml_Catalog_Product_AttributeController::saveAction().
 *
 * @return int|false
 */
function createAttribute($labelText, $attributeCode, $values = -1, $productTypes = -1, $setInfo = -1, $options = -1)
{

    $labelText = trim($labelText);
    $attributeCode = trim($attributeCode);

    if($labelText == '' || $attributeCode == '')
    {
        echo "Can't import the attribute with an empty label or code.  LABEL= [$labelText]  CODE= [$attributeCode]"."<br/>";
        return false;
    }

    if($values === -1)
        $values = array();

    if($productTypes === -1)
        $productTypes = array();

    if($setInfo !== -1 && (isset($setInfo['SetID']) == false || isset($setInfo['GroupID']) == false))
    {
        echo "Please provide both the set-ID and the group-ID of the attribute-set if you'd like to subscribe to one."."<br/>";
        return false;
    }

    echo "Creating attribute [$labelText] with code [$attributeCode]."."<br/>";

    //>>>> Build the data structure that will define the attribute. See
    //     Mage_Adminhtml_Catalog_Product_AttributeController::saveAction().

    $data = array(
                    'is_global'                     => '0',
                    'frontend_input'                => 'text',
                    'default_value_text'            => '',
                    'default_value_yesno'           => '0',
                    'default_value_date'            => '',
                    'default_value_textarea'        => '',
                    'is_unique'                     => '0',
                    'is_required'                   => '0',
                    'frontend_class'                => '',
                    'is_searchable'                 => '1',
                    'is_visible_in_advanced_search' => '1',
                    'is_comparable'                 => '1',
                    'is_used_for_promo_rules'       => '0',
                    'is_html_allowed_on_front'      => '1',
                    'is_visible_on_front'           => '0',
                    'used_in_product_listing'       => '0',
                    'used_for_sort_by'              => '0',
                    'is_configurable'               => '0',
                    'is_filterable'                 => '0',
                    'is_filterable_in_search'       => '0',
                    'backend_type'                  => 'varchar',
                    'default_value'                 => '',
                    'is_user_defined'               => '0',
                    'is_visible'                    => '1',
                    'is_used_for_price_rules'       => '0',
                    'position'                      => '0',
                    'is_wysiwyg_enabled'            => '0',
                    'backend_model'                 => '',
                    'attribute_model'               => '',
                    'backend_table'                 => '',
                    'frontend_model'                => '',
                    'source_model'                  => '',
                    'note'                          => '',
                    'frontend_input_renderer'       => '',                      
                );

    // Now, overlay the incoming values on to the defaults.
    foreach($values as $key => $newValue)
        if(isset($data[$key]) == false)
        {
            echo "Attribute feature [$key] is not valid."."<br/>";
            return false;
        }

        else
            $data[$key] = $newValue;

    // Valid product types: simple, grouped, configurable, virtual, bundle, downloadable, giftcard
    $data['apply_to']       = $productTypes;
    $data['attribute_code'] = $attributeCode;
    $data['frontend_label'] = array(
                                        0 => $labelText,
                                        1 => '',
                                        3 => '',
                                        2 => '',
                                        4 => '',
                                    );

    //<<<<

    //>>>> Build the model.

    $model = Mage::getModel('catalog/resource_eav_attribute');

    $model->addData($data);

    if($setInfo !== -1)
    {
        $model->setAttributeSetId($setInfo['SetID']);
        $model->setAttributeGroupId($setInfo['GroupID']);
    }

    $entityTypeID = Mage::getModel('eav/entity')->setType('catalog_product')->getTypeId();
    $model->setEntityTypeId($entityTypeID);

    $model->setIsUserDefined(1);

    //<<<<

    // Save.

    try
    {
        $model->save();
    }
    catch(Exception $ex)
    {
        echo "Attribute [$labelText] could not be saved: " . $ex->getMessage()."<br/>";
        return false;
    }

    if(is_array($options)){
        foreach($options as $_opt){
            addAttributeValue($attributeCode, $_opt);
        }
    }

    $id = $model->getId();

    echo "Attribute [$labelText] has been saved as ID ($id).<br/>";

    // return $id;
}

function addAttributeValue($arg_attribute, $arg_value)
{
    $attribute_model        = Mage::getModel('eav/entity_attribute');

    $attribute_code         = $attribute_model->getIdByCode('catalog_product', $arg_attribute);
    $attribute              = $attribute_model->load($attribute_code);

    if(!attributeValueExists($arg_attribute, $arg_value))
    {
        $value['option'] = array($arg_value,$arg_value);
        $result = array('value' => $value);
        $attribute->setData('option',$result);
        $attribute->save();
    }

    $attribute_options_model= Mage::getModel('eav/entity_attribute_source_table') ;
    $attribute_table        = $attribute_options_model->setAttribute($attribute);
    $options                = $attribute_options_model->getAllOptions(false);

    foreach($options as $option)
    {
        if ($option['label'] == $arg_value)
        {
            return $option['value'];
        }
    }
   return false;
}
function attributeValueExists($arg_attribute, $arg_value)
{
    $attribute_model        = Mage::getModel('eav/entity_attribute');
    $attribute_options_model= Mage::getModel('eav/entity_attribute_source_table') ;

    $attribute_code         = $attribute_model->getIdByCode('catalog_product', $arg_attribute);
    $attribute              = $attribute_model->load($attribute_code);

    $attribute_table        = $attribute_options_model->setAttribute($attribute);
    $options                = $attribute_options_model->getAllOptions(false);

    foreach($options as $option)
    {
        if ($option['label'] == $arg_value)
        {
            return $option['value'];
        }
    }

    return false;
}

NOTE: Allthough exceptions have been handled, Backup your Database before you import these attributes, to be on safer side. Happy Importing!

Thanks to :

• Programatically create attribute in Magento, useful for the “on the fly” import system
• programmatically_adding_attributes_and_attribute_sets
• Magento – Programmatically insert new attribute option

Obviously reuse attributes between attribute sets where it makes sense.

The key with attributes is to strike a balance between the number of attributes and attribute options. Its no good having a single colour attribute if you have 3000 options for it. Similarly, its a waste if you have 300 attributes for colour, with only 10 options in each.

The thing with attributes, is whilst desirable to have rich, detailed information for products, it isn't always necessary to break down every possible facet of a product into attributes.

Attributes need only be populated if they are being used, for example if they are used for layered nav., for configurable product creation etc. But if merely just to display product information, there is no reason why you couldn't group the data in a single attribute text field.

Attribute sets usually mirror categories - and there is no good reason to have 2500 categories of products. That being said, attribute sets don't really come with overhead, only the attributes do.