31 days of Drupal migrations
31 days of Drupal migrations
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31 days of Drupal migrations

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Last updated on 2020-05-29

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 this educational project moving forward.

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

  • 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
  • Notes

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