31 days of Drupal migrations
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31 days of Drupal migrations

About the Book

This book covers Migrate API concepts for Drupal 8/9 and beyond. Examples include migrating from different sources into different destination types. It also includes tips on running migration projects and debugging issues. You can read the full series online at https://understanddrupal.com/31-days-of-migrations If you are able to pay for the eBook version of the series, your purchase will support keeping the content and examples up to date.

About the Author

Mauricio Dinarte
Mauricio Dinarte

Mauricio Dinarte is creating web development educational material in multiple languages.

At https://understanddrupal.com/ we are producing Drupal tutorials in English, Spanish, and French. We would appreciate your support in keeping this educational project moving forward.

Table of Contents

  • Understand Drupal Migrations Course
    • Content
    • Testimonials
  • Drupal migrations: Understanding the ETL process
    • Understanding the ETL process
    • Drupal migrations: a two step process
  • Writing your first Drupal migration
    • Writing the migration definition file
    • Running the migration
  • Using process plugins for data transformation in Drupal migrations
    • Syntactic sugar
    • Providing default values
    • Concatenating values
    • Chaining process plugins
  • Migrating data into Drupal subfields
    • Getting the example code
    • Migrating formatted text
    • Migrating images
    • Which subfields are available?
    • Default subfields
  • Using constants and pseudofields as data placeholders in the Drupal migration process pipeline
    • Setting and using source constants
    • Setting and using pseudofields
    • Understanding Drupal Migrate API process pipeline
    • Migrating images using the image_import plugin
  • Tips for writing Drupal migrations and understanding their workflow
    • Importing and rolling back migrations
    • Stopping and resetting migrations
    • What happens when you rollback a Drupal migration?
    • Re-import or update migrations
    • Tips for writing Drupal migrations
  • Migrating files and images into Drupal
    • File entity migrate destination
    • Source section definition
    • Process section definition
    • Skipping invalid records
    • Creating the destination URI
    • Creating the source URI
    • Copying the image file to Drupal
  • Introduction to migration dependencies in Drupal
    • Breaking up migrations
    • Writing the source and destination definition
    • Using previously imported files in image fields
    • Being explicit about migration dependencies
    • Tagging migrations
  • Migrating taxonomy terms and multivalue fields into Drupal
    • Getting the code
    • Migrating taxonomy terms and their hierarchy
    • Migrating multivalue taxonomy terms fields
    • More syntactic sugar
  • Migrating users into Drupal - Part 1
    • Getting the code
    • Understanding the source
    • Configuring the destination and dependencies
    • Processing the fields
  • Migrating users into Drupal - Part 2
    • Getting the code
    • Migrating user creation date
    • Migrating user roles
    • Migrating profile pictures
  • Migrating dates into Drupal
    • Getting the code
    • PHP date format characters
    • Date format conversions
    • Node creation time migration
    • Date only migration
    • Date range migration
    • Datetime migration
    • Things to consider
  • Migrating addresses into Drupal
    • Getting the code
    • Source and destination sections
    • Available subfields
    • Address subfield mappings
    • Finding expected values
    • The commerceguys addressing library
    • Migrating country and zone fields
  • Introduction to paragraphs migrations in Drupal
    • Getting the code
    • Understanding the example set up
    • The paragraph migration
    • The node migration
    • Paragraph field mappings
    • Do migrated paragraphs disappear upon node rollback?
  • Migrating CSV files into Drupal
    • Getting the code
    • Understanding the example set up
    • Migrating CSV files with a header row
    • Migrating CSV files without a header row
    • CSV file location
    • CSV source plugin configuration
  • Migrating JSON files into Drupal
    • Getting the code
    • Understanding the example set up
    • Migrating nodes from a JSON file
    • Migrating paragraphs from a JSON file
    • Migrating images from a JSON file
    • JSON file location
    • Migrating remote JSON files
  • Migrating XML files into Drupal
    • Getting the code
    • Understanding the example set up
    • Migrating nodes from a XML file
    • Migrating paragraphs from a XML file
    • Migrating images from a XML file
    • XML file location
    • Migrating remote XML files
    • XMLReader vs SimpleXML in Drupal migrations
  • Adding HTTP request headers and authentication to remote JSON and XML in Drupal migrations
    • Migrate Plus architecture for remote data fetching
    • JSON and XML Drupal migrations with HTTP request headers and Basic authentication.
    • JSON and XML Drupal migrations with HTTP request headers and Digest authentication.
    • JSON and XML Drupal migrations with HTTP request headers and OAuth2 authentication
  • Migrating Google Sheets into Drupal
    • Getting the code
    • Understanding the example set up
    • Migrating nodes from Google Sheets
    • Publishing a Google Sheet in JSON format
    • Understanding the published Google Sheet JSON export
    • Configuring the Migrate Google Sheets source plugin
  • Migrating Microsoft Excel and LibreOffice Calc files into Drupal
    • Getting the code
    • Understanding the example set up
    • Understanding the source document and plugin configuration
    • Migrating spreadsheet files with a header row
    • Migrating spreadsheet files without a header row
  • Defining Drupal migrations as configuration entities with the Migrate Plus module
    • Drupal migrations: code or configuration?
    • Transitioning to configuration entities
    • UUIDs for migration configuration entities
    • Automatically deleting migration configuration entities
  • Workflows and benefits of managing Drupal migrations as configuration entities
    • What is the benefit of managing migration as configurations?
    • Are there any drawbacks?
    • Workflow for managing migrations as configuration entities
  • Using migration groups to share configuration among Drupal migrations
    • Understanding migration groups
    • Creating a migration group
    • Organizing and executing migrations
    • Sharing configuration with migration groups
  • What is the difference between migration tags and migration groups in Drupal?
    • What is the difference between migration tags and migration groups?
    • What do migration tags and groups have in common?
    • Can groups only be used for migrations defined as configuration entities?
    • Setting migration tags inside migration groups
  • Executing Drupal migrations from the user interface with Migrate Tools
    • Getting the example code
    • Importing configuration entities from the user interface
    • Executing configuration entities from the user interface
    • Limitations of the user interface
  • Understanding the entity_lookup and entity_generate process plugins from Migrate Tools
    • What is the difference among the migration_lookup, entity_lookup, entity_generate plugins?
    • Getting the example code
    • Using the entity_lookup to assign the node author
    • Using the entity_generate to assign and create taxonomy terms
    • More configuration options
    • Compromises and limitations
  • How to debug Drupal migrations? - Part 1
    • Minimizing the surface for errors
    • What to check first?
    • Migration messages
    • The log process plugin
  • How to debug Drupal migrations? - Part 2
    • The migrate_devel module
    • The debug process plugin
    • Using the right tool for the job: a debugger
    • If it is not broken, break it on purpose
    • The migrate:fields-source Drush command
  • How to configure XDebug, PHPStorm, and DrupalVM to debug Drupal migrations via Drush commands and the browser?
    • Getting DrupalVM
    • Configuring PHPStorm
    • Triggering the breakpoint
    • Debugging from the user interface
  • List of migration related Drupal modules
    • Core modules
    • Migration runners
    • Source plugins
    • Destination plugins
    • Development related
    • Field and module related
    • Modules created by Tess Flynn (socketwench)
    • Miscellaneous
  • Introduction to Drupal 8 upgrades
    • What is a Drupal upgrade?
    • Preparing your migration
    • Customizing your migration
    • Performing the upgrade
    • Known issues and limitations
    • Upgrade paths for contributed modules
    • Upgrade strategies
    • What about upgrading to Drupal 9?
  • Notes

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