Drupal 7 Module Development

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Submit callback The submit callback is a little more interesting but not by much: Chapter 6 function artwork_form_submit($form, &$form_state) { global $user; $artwork = &$form_state['artwork']; // Set the artwork's uid if it's being created at this time. if (empty($artwork->uid)) { $artwork->uid = $user->uid; } $artwork->title = $form_state['values']['title']; $artwork->revision = $form_state['values']['revision']; // Notify field widgets. field_attach_submit('artwork', $artwork, $form, $form_state); // Save the artwork. artwork_save($artwork); // Notify the user. drupal_set_message(t('Artwork saved.')); } $form_state['redirect'] = 'artwork/' . $artwork->aid; First we pull the old artwork object out of the $form_state variable. Next we set its user, if it's a new artwork, and populate it with the few values we have from the form. We've already confirmed that those values are valid in the validation hook. field_attach_submit(), much like its sibling functions, lets the Field system respond to the fact that a form was just submitted and do whatever it wants to do. Then we simply save the artwork. It is important to note here that the submit callback is doing extremely little. It's just glue code between the form and the artwork_save() function, really. That's a good thing. It means that artwork operations, such as saving, are not dependent on the form system. Never do serious processing in a form submit callback. The actual work of saving an entity and its data should happen in the entity's save routines. The form submit callback is just glue code. [ 171 ]
Working with Content Saving your artwork What does artwork_save() look like, though? Like artwork_load() it's really just a thin wrapper: function artwork_save($artwork) { return entity_get_controller('artwork')->save($artwork); } Once again, we let the controller class do the hard work. The save() method itself is actually broken into two parts, one for normal saving and one for revisions. public function save($artwork) { $transaction = db_transaction(); try { global $user; // Determine if we will be inserting a new artwork. $artwork->is_new = empty($artwork->aid); // Set the timestamp fields. if (empty($artwork->created)) { $artwork->created = REQUEST_TIME; } $artwork->changed = REQUEST_TIME; $artwork->revision_timestamp = REQUEST_TIME; $update_artwork = TRUE; // Give modules the opportunity to prepare field data for // saving. field_attach_presave('artwork', $artwork); if (!$artwork->is_new && !empty($artwork->revision) && $artwork->vid) { $artwork->old_vid = $artwork->vid; unset($artwork->vid); } // If this is a new artwork... if ($artwork->is_new) { // Save the new artwork. drupal_write_record('artwork', $artwork); [ 172 ]
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www.allitebooks.com
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Drupal 7 Module Development Copyrig
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Foreword Drupal has its roots in th
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About the Authors Matt Butcher is a
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Larry Garfield is a Senior Architec
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John Albin Wilkins has been a web d
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Jojodae Ganesh Sivaji has been invo
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Why Subscribe? • Fully searchable
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Table of Contents Tools for develop
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Table of Contents A shortcut for sy
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Table of Contents Using hook_node_a
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Table of Contents Creating a task 3
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Preface Chapter 5, Building an Admi
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Preface The system for handling thi
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Developing for Drupal 7 Drupal is a
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However, what we do want to start w
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The Operating System Chapter 1 Wind
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Chapter 1 Drupal core is the founda
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Chapter 1 The database We have take
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Chapter 1 The responsibility of the
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Chapter 1 While one could imagine t
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Chapter 1 We assume that you have y
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Chapter 1 The following are a few o
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Creating Your First Module We are g
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Creating Your First Module As obvio
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Creating Your First Module By Drupa
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Creating Your First Module The next
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Creating Your First Module When Dru
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Creating Your First Module Doxygen-
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Creating Your First Module The help
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Creating Your First Module Drupal s
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Creating Your First Module Finally,
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Creating Your First Module Here's o
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Creating Your First Module ); } } r
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Creating Your First Module Not in J
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Creating Your First Module There ar
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Creating Your First Module The exam
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Creating Your First Module Setting
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Creating Your First Module } ); pub
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Creating Your First Module You migh
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Creating Your First Module The repo
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Drupal’s Theme Layer This book is
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Drupal’s Theme Layer There are ac
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Drupal’s Theme Layer Theme engine
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Drupal’s Theme Layer Preprocess f
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Drupal’s Theme Layer A Drupal the
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Drupal’s Theme Layer The theme()
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Drupal’s Theme Layer Now, if you
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Drupal’s Theme Layer A similar pr
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Drupal’s Theme Layer Now, that wa
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Drupal’s Theme Layer • #suffix:
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Drupal’s Theme Layer Two powerful
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Drupal’s Theme Layer 'menu_tree__
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Drupal’s Theme Layer If a functio
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Drupal’s Theme Layer We've also s
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Drupal’s Theme Layer Summary You'
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Theming a Module After all, if you
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Theming a Module * Enables a single
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Theming a Module * First draft! * *
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Theming a Module Theming a Drupal b
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Theming a Module Converting a theme
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Theming a Module if (is_array($elem
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Theming a Module Notice that the .b
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Theming a Module } $block['content'
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Theming a Module } 'variables' => a
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Theming a Module } // Theme the use
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Theming a Module // Create links fo
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Theming a Module } // Load the acco
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Theming a Module * - $user: The use
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Theming a Module Summary In this ch
Page 143 and 144: Building an Admin Interface Startin
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Page 147 and 148: Building an Admin Interface 'access
Page 149 and 150: Building an Admin Interface Each ar
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Page 159 and 160: Building an Admin Interface Form su
Page 161 and 162: Building an Admin Interface A short
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Page 165 and 166: Building an Admin Interface PHP mai
Page 167 and 168: Building an Admin Interface Impleme
Page 169 and 170: Building an Admin Interface Debuggi
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Page 174 and 175: Working with Content Drupal 7 intro
Page 176 and 177: Chapter 6 The Schema API allows dat
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Page 180 and 181: Chapter 6 'fieldable' => TRUE, 'ent
Page 182 and 183: Chapter 6 The return value from the
Page 184 and 185: Chapter 6 In our case, we defined t
Page 186 and 187: Chapter 6 Most entity operations in
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Page 192 and 193: Chapter 6 This hook defines a new f
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Page 198 and 199: Chapter 6 Master/slave database con
Page 200 and 201: Chapter 6 array($artwork->aid => $a
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Page 204 and 205: Chapter 6 } foreach ($artworks as $
Page 206 and 207: Creating New Fields In the last cha
Page 208 and 209: Chapter 7 Although an advanced topi
Page 210 and 211: Chapter 7 The most important magic
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Page 214 and 215: Chapter 7 Exposing fields to the Fo
Page 216 and 217: Chapter 7 $element['width'] = array
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Page 220 and 221: Chapter 7 } return; 'field_ui_field
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Page 228 and 229: Chapter 7 We can, of course, have m
Page 230 and 231: Chapter 7 To demonstrate how entity
Page 232 and 233: [ 209 ] Chapter 7 Now look at that
Page 234 and 235: Drupal Permissions and Security Per
Page 236 and 237: Chapter 8 The preceding code checks
Page 238 and 239: Chapter 8 If we had accidentally ru
Page 240 and 241: Chapter 8 The user_access() functio
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Chapter 8 Declaring your own access
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} Chapter 8 'page callback' => 'exa
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Chapter 8 if (!flood_is_allowed('co
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[ 227 ] Chapter 8 Enabling permissi
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Chapter 8 } $permissions = array( '
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Chapter 8 This approach is the prop
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Chapter 8 Running access checks on
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Chapter 8 Handling AJAX callbacks s
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Chapter 8 As a result, we cannot tr
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Chapter 8 This allows us to pass a
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Node Access Out-of-the-box, Drupal
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Chapter 9 The Node Access API allow
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* - "delete" * - "create" * @param
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Chapter 9 if (!user_access('access
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Chapter 9 } if (module_implements('
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Chapter 9 hook_node_access() is the
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Chapter 9 Note that the {node_acces
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Chapter 9 The basic permission 'cre
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Chapter 9 It is a good idea to writ
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Chapter 9 On node listing pages, th
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Chapter 9 Writing a complete node a
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• Can this user bypass node acces
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Chapter 9 For our test module, we w
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Chapter 9 When hook_node_access_rec
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Chapter 9 A few things to consider
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Chapter 9 Security considerations T
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Chapter 9 Rebuilding the {node_acce
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Chapter 9 Using the new hook_node_a
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Chapter 9 We may alter any element
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Chapter 9 } // Check anonymous user
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Chapter 9 // Check the permission.
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Chapter 9 The key to Devel Node Acc
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Chapter 9 In the preceding case, th
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JavaScript in Drupal JavaScript is
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Chapter 10 Adding JavaScript and CS
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Chapter 10 When a JavaScript librar
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The following code adds a system CS
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Chapter 10 The second argument can
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Chapter 10 From here onwards, when
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Chapter 10 If a renderable array is
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Chapter 10 Drupal specific JavaScri
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Chapter 10 There are three ways var
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Chapter 10 AJAX helpers Included in
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The callback function hello_world_s
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Chapter 10 Once the response is set
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ajax_command_prepend To add content
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Working with Files and Images Drupa
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Chapter 11 It is very important tha
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Chapter 11 In order to open files f
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Chapter 11 Stream wrappers If you'v
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Chapter 11 In some cases you may no
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Chapter 11 A read-only stream wrapp
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Chapter 11 } 'type' => STREAM_WRAPP
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Chapter 11 For full details of thes
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Chapter 11 After this setup, we sta
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Chapter 11 This is all very cool, b
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Chapter 11 This is where you can st
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Chapter 11 • form callback: If yo
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Chapter 11 Finally we can make the
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Chapter 11 Pretty cool right? Howev
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Chapter 11 As you can see, there is
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Installation Profiles This chapter
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Chapter 12 Profile modules and them
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Enabling modules Just like modules
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Chapter 12 • display_name: A huma
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Next, let's create a form to enter
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Chapter 12 Notice that $install_sta
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Chapter 12 Here, the task that sets
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Chapter 12 Each row being added to
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Chapter 12 // URL filter. 'filter_u
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Chapter 12 'locale' => 'en', ), //
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Database Access Although Drupal 7 h
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Appendix A Result objects The retur
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Appendix A The join() methods all r
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[ 369 ] Appendix A The db_insert()
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Appendix A A Merge query says, in e
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Appendix A Slave servers Drupal als
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Security Throughout this book, we h
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Filtering The following guidelines
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First, whenever we write a query ag
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Appendix B There are both RSS feeds
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ajax_command_alert command 309 ajax
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Drupal, subsytems blocks 20 code te
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form handling 229 forms access chec
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K key() method 371 L label property
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evision handling 175 revisions hand
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U unit test 49 update queries 370 u
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Drupal 7 ISBN: 978-1-84951-286-2 Pa
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