Drupal 7 Module Development

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Chapter 6 This hook defines a new form on the fly for every artwork type we have, and declares that all of them should use the same callback function, artwork_form(). Now all we need is the artwork_form() function and all artwork forms will have the same processing. function artwork_form($form, &$form_state, $artwork) { // Set the id to identify this as an artwork edit form. $form['#id'] = 'artwork-form'; // Save the artwork for later, in case we need it. $form['#artwork'] = $artwork; $form_state['artwork'] = $artwork; // Common fields. We don't have many. $form['title'] = array( '#type' => 'textfield', '#title' => t('Title'), '#default_value' => $artwork->title, '#weight' => -5, '#required' => TRUE, ); $form['revision'] = array( '#access' => user_access('administer artworks'), '#type' => 'checkbox', '#title' => t('Create new revision'), '#default_value' => 0, ); // Add the buttons. $form['buttons'] = array(); $form['buttons']['#weight'] = 100; $form['buttons']['submit'] = array( '#type' => 'submit', '#value' => t('Save'), '#weight' => 5, '#submit' => array('artwork_form_submit'), ); if (!empty($artwork->aid)) { $form['buttons']['delete'] = array( '#access' => user_access('delete artworks'), '#type' => 'submit', '#value' => t('Delete'), '#weight' => 15, [ 169 ]
Working with Content } '#submit' => array('artwork_form_delete_submit'), ); $form['#validate'][] = 'artwork_form_validate'; field_attach_form('artwork', $artwork, $form, $form_state); } return $form; Once again, a fair number of lines but all fairly simple. First we set a fake property on the form so that form_alter implementations may detect all artwork forms of any type and stick the artwork object itself into the form in case we need it later in validate or submit routines. We then add a form field for the title and a checkbox to indicate whether we should save a new revision or overwrite the existing revision. We then add not one but two buttons, one that is always available for the save operation and another for deleting an artwork if we're editing an existing artwork. More on that later. The last line is very important. The field_attach_form() call is what passes our form off to the Field system so that any fields we've added to this artwork type can be added to the form. Think of it as a Field-specific form_alter operation. The form properties that the Field system adds are quite complex, but we don't have to worry about them. They just work. Validation callback Similar to the form, the validation callback passes most of its logic off to the Field system. function artwork_form_validate($form, &$form_state) { $artwork = $form_state['artwork']; } // Field validation. field_attach_form_validate('artwork', $artwork, $form, $form_state); If we had any validation of our own we would include it here, but in this case any validation we'd do (checking for required fields) the Form API already does for us. All we need do is tell the Field system to do its own validation. [ 170 ]
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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 * - $user: The use
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Page 149 and 150: Building an Admin Interface Each ar
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Page 159 and 160: Building an Admin Interface Form su
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Page 169 and 170: Building an Admin Interface Debuggi
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Page 174 and 175: Working with Content Drupal 7 intro
Page 176 and 177: Chapter 6 The Schema API allows dat
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Page 180 and 181: Chapter 6 'fieldable' => TRUE, 'ent
Page 182 and 183: Chapter 6 The return value from the
Page 184 and 185: Chapter 6 In our case, we defined t
Page 186 and 187: Chapter 6 Most entity operations in
Page 188 and 189: [ 165 ] Chapter 6 This callback sim
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Page 194 and 195: Submit callback The submit callback
Page 196 and 197: Chapter 6 // Save the initial revis
Page 198 and 199: Chapter 6 Master/slave database con
Page 200 and 201: Chapter 6 array($artwork->aid => $a
Page 202 and 203: Chapter 6 'access arguments' => arr
Page 204 and 205: Chapter 6 } foreach ($artworks as $
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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 $element['width'] = array
Page 218 and 219: Chapter 7 if ($widget['type'] == 'd
Page 220 and 221: Chapter 7 } return; 'field_ui_field
Page 222 and 223: Chapter 7 } function theme_dimfield
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Page 226 and 227: Chapter 7 } else if ($settings['uni
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
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Page 240 and 241: Chapter 8 The user_access() functio
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In the first case, Are we looking a
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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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