Drupal 7 Module Development

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Chapter 4 Preprocess functions Our theme hook is now given a $node object, but template files expect variables containing strings or render elements. So we're going to need to transform the $node object's data into a series of variables. Technically, we could have performed this business logic directly inside our single_blog_block_view() function, but instead we're going to do this transformation in a preprocess function. That's actually the purpose of the preprocess function: to transform raw data into variables needed for a theme hook's template or theme function. (Also, recall that preprocess functions should never query for raw data; the raw data should be passed as variables.) Since we own this theme hook, we'll need to define our preprocess function with a template_ prefix. /** * Preprocesses single blog block item variables. */ function template_preprocess_single_blog_block_item(&$variables) { $node = $variables['node']; To make it easier to access all the object properties of our node variable, we're going to first create a $node local variable which we'll use inside the preprocess function: // Create a renderable array for the title. $variables['title'] = array( '#type' => 'link', '#title' => $node->title, '#href' => 'node/' . $node->nid, ); Next we'll create the $title variable as a render element; it is identical to what we saw in the second version of our module: // Format the creation date of the node. $variables['created'] = $node->created; $variables['date'] = format_date($node->created, 'custom', 'F d, Y'); Date timestamps don't make very good render elements, so we'll just create two variables, one with the raw, unformatted date value and one with formatted date: // Load the account object with the node's creator and store // in a variable for themer convenience. $variables['user'] = user_load($node->uid); [ 109 ]
Theming a <strong>Module</strong> } // Theme the username. $variables['name'] = theme('username', array( 'account' => $variables['user'])); And finally, we'll pass the $user object of the author and theme the username. All that's left is to order the variables the way we desire in our template file! However, since we've made the last change to our .module file, let's look at the finished product:
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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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Page 85 and 86: Drupal’s Theme Layer This book is
Page 87 and 88: Drupal’s Theme Layer There are ac
Page 89 and 90: Drupal’s Theme Layer Theme engine
Page 91 and 92: Drupal’s Theme Layer Preprocess f
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Page 105 and 106: Drupal’s Theme Layer Two powerful
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Page 109 and 110: Drupal’s Theme Layer If a functio
Page 111 and 112: Drupal’s Theme Layer We've also s
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Page 115 and 116: Theming a Module After all, if you
Page 117 and 118: Theming a Module * Enables a single
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Page 121 and 122: Theming a Module Theming a Drupal b
Page 123 and 124: Theming a Module Converting a theme
Page 125 and 126: Theming a Module if (is_array($elem
Page 127 and 128: Theming a Module Notice that the .b
Page 129 and 130: Theming a Module } $block['content'
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Page 135 and 136: Theming a Module // Create links fo
Page 137 and 138: Theming a Module } // Load the acco
Page 139 and 140: Theming a Module * - $user: The use
Page 141 and 142: Theming a Module Summary In this ch
Page 143 and 144: Building an Admin Interface Startin
Page 145 and 146: Building an Admin Interface $items[
Page 147 and 148: Building an Admin Interface 'access
Page 149 and 150: Building an Admin Interface Each ar
Page 151 and 152: Building an Admin Interface Other p
Page 153 and 154: Building an Admin Interface Each el
Page 155 and 156: Building an Admin Interface Drupal
Page 157 and 158: Building an Admin Interface This is
Page 159 and 160: Building an Admin Interface Form su
Page 161 and 162: Building an Admin Interface A short
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Page 169 and 170: Building an Admin Interface Debuggi
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Page 174 and 175: Working with Content Drupal 7 intro
Page 176 and 177: Chapter 6 The Schema API allows dat
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Page 180 and 181: Chapter 6 'fieldable' => TRUE, 'ent
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Chapter 6 The return value from the
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Chapter 6 In our case, we defined t
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Chapter 6 Most entity operations in
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[ 165 ] Chapter 6 This callback sim
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Chapter 6 This page will simply gen
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Chapter 6 This hook defines a new f
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Submit callback The submit callback
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Chapter 6 // Save the initial revis
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Chapter 6 Master/slave database con
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Chapter 6 array($artwork->aid => $a
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Chapter 6 'access arguments' => arr
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Chapter 6 } foreach ($artworks as $
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Creating New Fields In the last cha
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Chapter 7 Although an advanced topi
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Chapter 7 The most important magic
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Chapter 7 } } '#type' => 'select',
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Chapter 7 Exposing fields to the Fo
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Chapter 7 $element['width'] = array
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Chapter 7 if ($widget['type'] == 'd
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Chapter 7 } return; 'field_ui_field
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Chapter 7 } function theme_dimfield
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Chapter 7 } '@height' => $item['hei
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Chapter 7 } else if ($settings['uni
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Chapter 7 We can, of course, have m
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Chapter 7 To demonstrate how entity
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[ 209 ] Chapter 7 Now look at that
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Drupal Permissions and Security Per
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Chapter 8 The preceding code checks
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Chapter 8 If we had accidentally ru
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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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