Drupal Association members fund grants that make connections all over the world.
This module converts references fields (from references module) to entity reference fields. A batch task will be issued (per field) to create a temporary table, store the reference values, delete the reference field, create a new
entity reference field, and copy over the values from the temporary table.
There are 2 possible ways to convert fields:
Go to admin/content/migrate-references, select the fields you wish to convert, and click confirm.
Type 'drush entityreference-migrate-references' (or 'drush emr') to convert all fields. You may provide a field machine name as an argument to convert on a field-by-field basis.
PRE-CONVERSION TASK LIST
Before starting any conversion, there are a few recommended tasks.
- Create a where-used list of fields, widgets and formatters, using:
- core: /admin/reports/fields
- contrib: Field Info
- Create a where-used list of fields, filter criteria, sort criteria, contextual filters, using:
- views: /admin/reports/fields/views-fields
There are some issues when you have a entityreference as an exposed filter, see: https://drupal.org/project/issues/entityreference?text=exposed+filter
Check your custom code that explicitly calls on data stored in references format.
BACKUP YOUR DATA
This is (very) strongly recommended. This is a one way conversion and data may not be easily restored if something goes wrong. Having a backup will ensure you have a safe point to revert your site.
POST-CONVERSION TASK LIST
Test all CRUD operation for each entity.
- For each field:
- restore the widget: unless the original widget was a checkbox/radio or select list, it is reset to Autocomplete by default.
- restore the formatter of each View mode; it is set to "Label, with link to referenced entity" by default
- Check any views where you used the entityreference; they may have broken handlers and will need to be rebuilt.
- For each mentioned View, check each display and test thoroughly!
- If you have dev environment and/or use features, perform the changes locally and check your views. You will have the ability to export them and import into your live site after the conversion. Using features would be even easier as you can just revert to your new views that utilize the entity reference handler.
Again, check your custom code.