What Block Am I In?

Trying to remove a block from a layout and it won’t go away? A trick to figure out where you are working is to use $block->getNameInLayout() and that should tell you what block you need to remove.

Did you create a module, does it load after or before a core module that might be putting your block back in? Did you set the core module as a dependency in both composer.json and module.xml in your module? If not, add that in, and setup:upgrade module:disable your module and setup:upgrade module:enable your module to force the dependency order to get reset.

Ubuntu on Windows 10 for Magento Development

Find the Ubuntu App in the Windows App Store and install it.

Run the bash shell – click the app icon to run it. You will be logged in to your Ubuntu machine.

Now, you need apache, mysql, and phpmyadmin, at a bare minimum in order to start your localhost web server. You probably also want to use multiple versions of php since you will have different web sites with different production environments.

Ubuntu will give you php 7.0 by default. We will add 5.6, 7.1, and 7.2 also.

  1. Install apache 2.
    $ sudo apt-get install apache2 libapache2-mod-fcgid

    You will be prompted to type Y to complete the installation.

  2. Start the apache service.
    $ sudo service apache2 start

    if you are prompted for a password, this is your password for the windows user account you are using windows under presently. You may see an error message when you start the service that looks like the below. You can safely ignore this message.

    At this point, you should be able to find your localhost in a browser.

  3. Set up MySQL Server (or mariadb)
    $ sudo apt-get install mysql-server

    Again, you will be prompted to type Y to complete the installation

  4. Start MySQL Server
    $ sudo service mysql start

  5. Verify MySQL is running.
    $ mysql -u root -p 
     
  6. Set up PHP. We need multiple versions of PHP since we work on multiple versions of Magento: 5.6 for m1, 7.1 for 2.2, and 7.2 for 2.3. We will have 7.0 from the default Ubuntu also.
    $ sudo apt-get install php libapache2-mod-php php-xml php-gd php-mcrypt php-mysql php-intl php-curl
    Answer Y to complete the installation.
  7. Validate that php is running.
    $ a2query -m php7.0
    If it is not running, enable it:
    $ sudo a2enmod php7.0
    and restart apache:
    $ sudo service apache2 restart
    Navigate to your webroot (/var/www/html) and create an index.php file
    Type
    sudo vi index.php
    then when the editor opens, type i to begin inserting text. When you are finished typing, escape, and type wq<enter> to write and quit the editor.
    Browse to your index.php file – you should see php info in your localhost now.
  8. PhpMyAdmin
    sudo apt-get install phpmyadmin

    When the first prompt appears, press Space, Tab, and then Enter to select Apache. Select yes when asked to use dbconfig-common to set up the database. Provide your MariaDB root password Choose a password for the phpMyAdmin application itself.

    Enable the necessary PHP extensions:

    sudo phpenmod mcrypt
    sudo phpenmod mbstring

    Add this line to the bottom of /etc/apache2/apache2.conf

    Include /etc/phpmyadmin/apache.conf

    Restart Apache:

    sudo service apache2 restart
    Now you can access phpMyAdmin on the following URL: http://localhost/phpmyadmin/
    You can login using the root username and the root password you set up during the MariaDB installation.
     
  9. Alternate PHP Versions
    For the installation of PHP versions, we use the PPA maintained here. Use the below couple of commands to add the PPA to your system. You will be prompted to type Y to confirm and continue the installation.
    $ sudo apt install python-software-properties
    $ sudo add-apt-repository ppa:ondrej/php
    $ sudo add-apt-repository ppa:ondrej/apache2
    For this tutorial, we are using the PHP 5.6, PHP 7.1 and PHP 7.2 to configure with Apache web server. To use the multiple PHP versions, we will use PHP FPM and FastCGI. Let’s install the following packages on your system. You will be prompted to type Y to continue after each php install.
    $ sudo apt update
    $ sudo apt install php5.6 php5.6-fpm php5.6-xml php5.6-gd php5.6-mcrypt php5.6-intl php5.6-mysql php5.6-curl
    $ sudo apt install php7.1 php7.1-fpm php7.1-xml php7.1-gd php7.1-mcrypt php7.1-intl php7.1-mysql php7.1-curl
    $ sudo apt install php7.2 php7.2-fpm php7.2-xml php7.2-gd php7.2-mcrypt php7.2-intl php7.2-mysql php7.2-curl
    After installation, php-fpm services will not be started automatically. Use the following commands to make sure all versions of php are installed.
    $ sudo update-alternatives --config php
    and these commands to start a specific service
    $ sudo service php5.6-fpm start
    $ sudo service php7.2-fpm start
    Edit the php.ini file to enable pdo – look for the line “extension=php_pdo_mysql.dll” and remove the ; at the front of it. Do this for each version of php-fpm you installed. The files are in /etc/php/*/fpm/php.ini where * is the php version number.

    Activate fcgid
    $ sudo a2enmod actions fcgid alias proxy_fcgi
     
  10. Make a symbolic link from one of your website project files to your webroot. Your webroot is in /var/www/html in the ubuntu shell.
    $ ln -s full-path-to-web-files-on-your-pc directory-name-for-site
    I am going to add a site that needs 5.6 and one that needs 7.2
  11. Add apache config for each new vhost
    You can add a new file for each host or just add to the default 000-default.conf file. Be sure to symlink sites-available to sites-enabled. The FilesMatch directive is used to set the php version for the site.
            
    <FilesMatch>
        SetHandler "proxy:unix:/var/run/php/php5.6-fpm.sock|fcgi://localhost/"
    </FilesMatch>
        
  12. Restart Apache
  13. Edit your hosts file

Next Steps

Add SSL – https://www.digitalocean.com/community/tutorials/how-to-create-a-self-signed-ssl-certificate-for-apache-in-ubuntu-16-04 (skip firewall step)

https://medium.com/@thomas.schmidt.0001/how-to-use-ubuntu-bash-on-windows-10-as-the-intellij-idea-terminal-334fd9a10d8c

https://getcomposer.org/download/

https:// tecadmin . net/install-redis-ubuntu/

https:// tecadmin . net/install-memcached-with-php-on-ubuntu/

git filter-branch –commit-filter

Don’t do it. Just don’t.

But suppose someone commits and then reverts a branch with a million files in it. It happens /vendor – I’m looking at you, here.

  1. Make sure your local repo has all the same branches as the remote and that they all track.
    git config --add remote.origin.push '+refs/tags/*:refs/tags/*'
    git config --add remote.origin.push '+refs/heads/*:refs/heads/*'
    
    for remote_branch in `git branch --all | grep -v HEAD | sed -e 's/\*//'`; do local_branch=`echo $remote_branch | sed -e 's!remotes/origin/!!'`; git checkout $local_branch; done
    
  2. now get the commit hashes for the commits you need to remove – for example, 2 commits
    git filter-branch --commit-filter '
        case $GIT_COMMIT in
        862ff2e9fc5926646bb9381e1a977c806e6f3e9e|862ff2e9fc5926646bb9381e1a977c806e6f3e9e)
            skip_commit "$@"
            ;;
        *)
            git commit-tree "$@"
            ;;
        esac' --tag-name-filter cat -- --all; git reflog expire --expire=now --all; git gc --aggressive --prune=now
  3. force push
  4. repeat in each branch

Magento 2 Plugin Limitations

Limitations

Plugins can not be used on following:

  • Final methods
  • Final classes
  • Non-public methods
  • Class methods (such as static methods)
  • __construct
  • Virtual types
  • Objects that are instantiated before Magento\Framework\Interception is bootstrapped

Magento 2 Custom Router and the Dreaded 100 matches

public function match (\Magento\Framework\App\RequestInterface $request)
{
    if (strpos($request->getPathInfo(), 'test') === false) return;
    $request->setModuleName(‘MyCompany_MyModule’)
       ->setControllerName('test')->setActionName('test');

    return $this->actionFactory->create(
        \Magento\Framework\App\Action\Forward::class, ['request' => $request]
    );
}

https://magento.stackexchange.com/questions/135532/magento-2-ce-front-controller-reached-100-router-match-iterations-issue

Magento 1 Admin Form Fields

All the different type of form fields available in magento are located in folder lib\Varien\Data\Form\Element

Text Field

Here is how to add a text field to an admin form, with a list of all the options

$fieldset->addField('title', 'text', array(
          'label'     => Mage::helper('form')->__('Title3'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "alert('on click');",
		  'onchange' => "alert('on change');",
		  'style'   => "border:10px",
		  'value'  => 'hello !!',
		  'disabled' => false,
		  'readonly' => true,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Time
$fieldset->addField('time', 'time', array(
          'label'     => Mage::helper('form')->__('Time'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '12,04,15',
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
TextArea
$fieldset->addField('textarea', 'textarea', array(
          'label'     => Mage::helper('form')->__('TextArea'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '<b><b/>',
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Submit Button
$fieldset->addField('submit', 'submit', array(
          'label'     => Mage::helper('form')->__('Submit'),
          'required'  => true,
		  'value'  => 'Submit',
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
DropDown
$fieldset->addField('select', 'select', array(
          'label'     => Mage::helper('form')->__('Select'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '1',
		  'values' => array('-1'=>'Please Select..','1' => 'Option1','2' => 'Option2', '3' => 'Option3'),
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));

Here is another version of the drop down

$fieldset->addField('select2', 'select', array(
          'label'     => Mage::helper('form')->__('Select Type2'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '4',
		  'values' => array(
		  						'-1'=>'Please Select..',
		  						'1' => array( 
												'value'=> array(array('value'=>'2' , 'label' => 'Option2') , array('value'=>'3' , 'label' =>'Option3') ),
												'label' => 'Size'	 
										   ),
								'2' => array( 
												'value'=> array(array('value'=>'4' , 'label' => 'Option4') , array('value'=>'5' , 'label' =>'Option5') ),
												'label' => 'Color'	 
										   ),										   
							     
						   ),
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Radio Button
$fieldset->addField('radio', 'radio', array(
          'label'     => Mage::helper('form')->__('Radio'),
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '1',
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
$fieldset->addField('radio2', 'radios', array(
          'label'     => Mage::helper('form')->__('Radios'),
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '2',
		  'values' => array(
		  					array('value'=>'1','label'=>'Radio1'),
		  					array('value'=>'2','label'=>'Radio2'),
		  					array('value'=>'3','label'=>'Radio3'),
		  			   ),
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Password Field
$fieldset->addField('password', 'password', array(
          'label'     => Mage::helper('form')->__('Password'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'style'   => "",
		  'value'  => 'hello !!',
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
$fieldset->addField('obscure', 'obscure', array(
          'label'     => Mage::helper('form')->__('Obscure'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'obscure',
		  'onclick' => "",
		  'onchange' => "",
		  'style'   => "",
		  'value'  => '123456789',
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Note
$fieldset->addField('note', 'note', array(
          'text'     => Mage::helper('form')->__('Text Text'),
		));
Multiselect
$fieldset->addField('multiselect2', 'multiselect', array(
          'label'     => Mage::helper('form')->__('Select Type2'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "return false;",
		  'onchange' => "return false;",
		  'value'  => '4',
		  'values' => array(
		  						'-1'=> array( 'label' => 'Please Select..', 'value' => '-1'),
		  						'1' => array( 
												'value'=> array(array('value'=>'2' , 'label' => 'Option2') , array('value'=>'3' , 'label' =>'Option3') ),
												'label' => 'Size'	 
										   ),
								'2' => array( 
												'value'=> array(array('value'=>'4' , 'label' => 'Option4') , array('value'=>'5' , 'label' =>'Option5') ),
												'label' => 'Color'	 
										   ),										   
							     
						   ),
		  'disabled' => false,
		  'readonly' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
		
Multiline
$fieldset->addField('multiline', 'multiline', array(
          'label'     => Mage::helper('form')->__('Multi Line'),
          'class'     => 'required-entry',
          'required'  => true,
          'name'      => 'title',
		  'onclick' => "",
		  'onchange' => "",
		  'style'   => "border:10px",
		  'value'  => 'hello !!',
		  'disabled' => false,
		  'readonly' => true,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Link
$fieldset->addField('link', 'link', array(
          'label'     => Mage::helper('form')->__('Link'),
		  'style'   => "",
		  'href' => 'www.excellencemagentoblog.com',
		  'value'  => 'Magento Blog',
		  'after_element_html' => ''
		));
Label
$fieldset->addField('label', 'label', array(
          'value'     => Mage::helper('form')->__('Label Text'),
		));
Image Upload
$fieldset->addField('image', 'image', array(
          'value'     => 'http://www.excellencemagentoblog.com/wp-content/themes/excelltheme/images/logo.png',
		));
File Upload
$fieldset->addField('file', 'file', array(
          'label'     => Mage::helper('form')->__('Upload'),
		  'value'  => 'Uplaod',
		  'disabled' => false,
		  'readonly' => true,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
Date
$fieldset->addField('date', 'date', array(
          'label'     => Mage::helper('form')->__('Date'),
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1,
		  'image' => $this->getSkinUrl('images/grid-cal.gif'),
	      'format' => Mage::app()->getLocale()->getDateFormat(Mage_Core_Model_Locale::FORMAT_TYPE_SHORT) 
		));
Checkbox
$fieldset->addField('checkbox', 'checkbox', array(
          'label'     => Mage::helper('form')->__('Checkbox'),
          'name'      => 'Checkbox',
		  'checked' => false,
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '1',
		  'disabled' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));
$fieldset->addField('checkboxes', 'checkboxes', array(
          'label'     => Mage::helper('form')->__('Checkboxs'),
          'name'      => 'Checkbox',
		  'values' => array(
		  					array('value'=>'1','label'=>'Checkbox1'),
		  					array('value'=>'2','label'=>'Checkbox2'),
		  					array('value'=>'3','label'=>'Checkbox3'),
		  			   ),
		  'onclick' => "",
		  'onchange' => "",
		  'value'  => '1',
		  'disabled' => false,
		  'after_element_html' => '<small>Comments</small>',
		  'tabindex' => 1
		));

Magento 2.3 Declarative Schema

In an effort to simplify the Magento installation and upgrade process, 2.3 introduces declarative schema.

With the new declarative schema approach allows,  developers are no longer forced to write scripts for each new version of a module. Using declarative schema, developers declare the final desired state of the database, and the system adjusts to it automatically, without performing redundant operations. In addition, this approach allows data to be easily deleted when a module is uninstalled.

There are two parts to using declarative schema: the db_schema.xml file and the bin/magento command to register it.

Once you use declarative schema in a module, you cannot use setup/upgrade scripts again. In the future, upgrade scripts will be phased out in favor of declarative schema.

The following example, extracted from the Catalog/etc/db_schema.xml file, defines the catalog_product_entity_datetime table:

<table name="catalog_product_entity_datetime" resource="default" engine="innodb"
           comment="Catalog Product Datetime Attribute Backend Table">
        <column xsi:type="int" name="value_id" padding="11" unsigned="false" nullable="false" identity="true" comment="Value ID"/>
        <column xsi:type="smallint" name="attribute_id" padding="5" unsigned="true" nullable="false" identity="false"default="0" comment="Attribute ID"/>
        <column xsi:type="smallint" name="store_id" padding="5" unsigned="true" nullable="false" identity="false" default="0" comment="Store ID"/>
        <column xsi:type="int" name="entity_id" padding="10" unsigned="true" nullable="false" identity="false" default="0"/>
        <column xsi:type="datetime" name="value" on_update="false" nullable="true" comment="Value"/>
        <constraint xsi:type="primary" name="PRIMARY">
            <column name="value_id"/>
        </constraint>
</table>

https://magento-devdocs.github.io/devdocs-for-tests/guides/v2.3/extension-dev-guide/declarative-schema/db-schema.html

Magento 2 Knockout JS in a Nutshell

We have defined a module with a simple module.xml and a registration.php file,

to call upon the regular flow of M2 merged XML layouts, to define a Block class that feeds data into a PHTML template,

which is then outputting a JSON configuration array that was inserted into the Block class using an XML argument-array,

and which is then used to initialize a custom AMD-style JS component through the Magento_Ui/js/core/app component,

which connects our require JS component to our KnockoutJS component.

Then, our JS component injects the customer-data component to collect a bit of information about the customer, which is fetched through a kind of local-storage-cached-AJAX-call to the backend,

which is configured through a DI type that injects an array of section sources into a backend class,

that fetches data from various sources, including our own, to then send back a bundled response, if possible, to the JS component, with the major feature being JavaScript AJAX lazy loading.

Namespace

/Module

/Block

Block.php

/etc

module.xml

/view

/frontend

/layouts

somelayout_file.xml

/templates

template.phtml

registration.php