Drupal 7 field API
- 1. Drupal 7: What's new Karoly Negyesi Clarity Digital (examiner.com)
- 2. What's new in Drupal 7 See http://blip.tv/file/2772239
- 3. Tons of new APIs
- 4. Most of them are well documented and easy
- 5. Field API: many new concepts and gotchas
- 6. Field API Extremely powerful
- 7. API and not browser driven
- 8. Our work now is “precision surgery”
- 10. Field storage
- 11. Field types
- 12. Widgets
- 13. Formatters
- 14. Fields
- 15. Attach
- 16. Instances
- 17. Anatomy of a node Organization: node type
- 20. Anatomy of a term Organization: vocabulary
- 22. Version identifier: tid (same)
- 23. Anatomy of an entity Entity type: node
- 25. Primary id: nid
- 26. Version id: vid Type: taxonomy term
- 28. Primary id: tid
- 29. Version id: tid list($id, $vid, $bundle) = entity_extract_ids($obj_type, $object);
- 30. Field storage Storage primitives
- 32. MongoDB
- 33. Field type Business logic of a field
- 35. Gotcha: extremely badly named hooks. for eg. hook_field_load node-like “one only” hook should be field_type not field .
- 36. Field A bunch of settings
- 37. Field type
- 38. Cardinality
- 39. Storage engine
- 40. All the things that are hard to upgrade
- 41. Core does not upgrade
- 43. (a) Field
- 44. (to a) Bundle
- 45. (is an) Instance
- 46. Instance Again a bunch of settings
- 47. Widget settings
- 50. Gotcha: formatter settings are stored in 'display'
- 51. Difference Fields describe data structure and behaviour
- 52. Hard to update
- 53. Instances are trivial to update
- 54. Instances are mostly just widget / formatter
- 55. Widgets Data entry mechanism
- 56. Generic: textfield, textarea, options_select...
- 57. Specific: Image (but there is always an alter)
- 58. Formatter Displays a field
- 59. Generic
- 60. Specific (yes, we have an alter here too)
- 61. Field attach API field_attach_* called explicitly by entity modules:
- 63. These call same named hooks
- 65. hook arguments are entity type and the entity
- 66. Gotcha: does not deal with attaching a field
- 67. But at least it's a real hook.
- 68. Field attach API continued Entity information can be extracted: list($id, $vid, $bundle, $cacheable) = entity_extract_ids($obj_type, $object);
- 69. Instances can be found: field_info_instances($obj_type, $bundle)
- 70. So all the gotchas hook_field_X is really “field_type X callback”
- 71. Entity type variables are typically $obj_type
- 72. Similarly, entities are $object
- 73. Formatter settings are in $instance['display']
- 74. The field attach API deals with fields already attached aka. Instances and not the attach itself
- 75. Taxonomy specific gotchas Vocabularies themselves are entities too
- 77. Hiearchy is not a field
- 78. Hook cornucopia field_attach_update('user', $object);
- 79. user_module_invoke('update', $edit, $user, $category);