DrupalCamp 2011 -- Poutine Maker

Sep 22, 20110 likes508 views

This document discusses creating custom fields in Drupal 7 using the Field API. It covers what custom fields are, what they can be used for, and the various hooks needed to define a custom field including its widget, schema, validator and formatter. The presenter demonstrates creating a custom "poutine" field with a color picker widget, schema definition, validation, and formatter to display field values. Resources are provided for more documentation on developing custom fields in Drupal 7.

Poutine Maker: Custom Fields
in Drupal 7
Tavish Armstrong
tavish@evolvingweb.ca

Agenda
Custom fields
What are they?
What are they good for?

Info() hooks

Creating a widget

Creating a schema

Creating a validator

Creating a formatter

Demo

Resources

http://evolvingweb.ca/story/poutine-maker-introduction-field-
api-drupal-7-part-1

http://drupal.org/sandbox/tarmstrong/1188140
https://github.com/tarmstrong/poutine_maker

Custom fields: What are they?

• Custom fields are like a custom data type
• You can also have a custom widgets, formatters, validation

Custom Fields: What are they good for?

• Drupal gives you text fields, date fields, etc.
• It won't give you a colour field. Or a poutine
field.
• You may want multi-value with a fieldset.
• Fancy widgets?
• Fancy formatting?
• Fancy validation?

Alternative: field_collection
Exciting project!

hook_field_formatter_view()

• Take all the saved field items (i.e. each
$delta) and return a renderable array for
each

$element[0] = array( first poutine item ... );
$element[1] = array( second poutine item...);

Questions?

Tavish Armstrong (tarmstrong)
tavish@evolvingweb.ca

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1. Poutine Maker: Custom Fields in Drupal 7 Tavish Armstrong [email protected]

2. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

3. Resources http://evolvingweb.ca/story/poutine-maker-introduction-field- api-drupal-7-part-1 http://drupal.org/sandbox/tarmstrong/1188140 https://github.com/tarmstrong/poutine_maker

4. Custom fields: What are they? • Custom fields are like a custom data type • You can also have a custom widgets, formatters, validation

5. Custom Fields: What are they good for? • Drupal gives you text fields, date fields, etc. • It won't give you a colour field. Or a poutine field. • You may want multi-value with a fieldset. • Fancy widgets? • Fancy formatting? • Fancy validation?

7. Colour picker widget

8. Alternative: field_collection Exciting project!

10. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

11. hook_field_info()

12. hook_field_widget_info()

13. hook_field_formatter_info()

15. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

16. hook_field_widget_form()

17. hook_field_widget_form()

18. hook_field_widget_form()

19. hook_field_widget_form()

20. hook_field_widget_form()

21. hook_field_widget_form()

22. hook_field_widget_form()

23. hook_field_widget_form()

25. hook_field_is_empty()

26. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

27. hook_field_schema()

29. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

30. hook_field_widget_error()

31. hook_field_validate()

32. hook_field_widget_error()

34. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

35. hook_field_formatter_view() • Take all the saved field items (i.e. each $delta) and return a renderable array for each $element[0] = array( first poutine item ... ); $element[1] = array( second poutine item...);

36. hook_field_formatter_view()

37. poutine_maker_format_field()

38. poutine_maker_format_field()

39. poutine_maker_format_field()

40. The finished formatter

41. Agenda Custom fields What are they? What are they good for? Info() hooks Creating a widget Creating a schema Creating a validator Creating a formatter Demo

42. Resources http://evolvingweb.ca/story/poutine-maker-introduction-field- api-drupal-7-part-1 http://drupal.org/sandbox/tarmstrong/1188140 https://github.com/tarmstrong/poutine_maker

43. Questions? Tavish Armstrong (tarmstrong) [email protected]

DrupalCamp 2011 -- Poutine Maker

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