Understand Drupal 7 Field API for creating your own Field Types and Field Widgets. This is all applicable to Drupal 6 CCK fields, for the most part.

1. The Field
API Trilogy
@helior

2. client specifications:
Site building 101
Typical config for CC info

3. site building results:
This is fine.

4. database results:
It’s all good.

5. Actually building a site
configuring more fields
adding more components

6. holy cow that’s
a lot of fields!
Not proud
Is something wrong?

7. concept of information
An “Idea”
This idea is not Drupal
native
customize in t wo ways:
- alter
- override

8. Field Types API
Big kid stuff.

9. hook_field_info()
'label'
'description'
'settings'
'instance_settings'
'default_widget'
'default_formatter'

10. What is the difference between
Fields and Instances?

11. hook_field_schema()
:: view code ::

12. Maintenance is required.
hook_field_validate()
hook_field_is_empty()
And also....
• hook_field_load()
• hook_field_validate()
• hook_field_presave()
• hook_field_insert()
• hook_field_update()
• hook_field_delete()
• hook_field_delete_revision()
• hook_field_prepare_view()

13. But wait, there's more!
hook_field_extra_fields()

14. Questions?