Drupal 7 Module Development

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Chapter 9 It is a good idea to write out such rules and review them with the project sponsor, because doing so can reveal the implications of applying the logic you have defined. In this case, rule #4 becomes key, because we will explicitly deny access to edit content, even for users who might have the edit any Article content permission. Doing so might lead to confusion for some users, so we should ensure that this is the rule that we want. We should point out, from a security perspective, that these rules will place all 'authenticated users' into the same group. This behavior may be desirable, or it may open a risk that all registered site users can edit all content. For the purpose of our demonstration module, let's assume that this behavior is desired, and that users who need their content protected will be given an additional role. Since this is the behavior we want, the functionality is pretty easy to enforce. Let's create a role_edit.module file for this behavior. Our module starts out much like the Delay module.
Node Access If the $diff array is empty, then the two users have the same roles and can be considered peers. if (empty($diff)) { return NODE_ACCESS_ALLOW; } Finally, we want to change our default return value, since our rule #4 indicated we want strict access control enforced. So if the diff returns a value, we deny access: return NODE_ACCESS_DENY; And that's the entire module. 17 lines of code:
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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
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Building an Admin Interface Startin
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Building an Admin Interface $items[
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Building an Admin Interface 'access
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Building an Admin Interface Each ar
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Building an Admin Interface Other p
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Building an Admin Interface Each el
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Building an Admin Interface Drupal
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Building an Admin Interface This is
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Building an Admin Interface Form su
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Building an Admin Interface A short
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Building an Admin Interface } retur
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Building an Admin Interface PHP mai
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Building an Admin Interface Impleme
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Building an Admin Interface Debuggi
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Building an Admin Interface This te
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Working with Content Drupal 7 intro
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Chapter 6 The Schema API allows dat
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'fields' => array( 'aid' => array(
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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
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
Page 242 and 243: In the first case, Are we looking a
Page 244 and 245: Chapter 8 Declaring your own access
Page 246 and 247: } Chapter 8 'page callback' => 'exa
Page 248 and 249: Chapter 8 if (!flood_is_allowed('co
Page 250 and 251: [ 227 ] Chapter 8 Enabling permissi
Page 252 and 253: Chapter 8 } $permissions = array( '
Page 254 and 255: Chapter 8 This approach is the prop
Page 256 and 257: Chapter 8 Running access checks on
Page 258 and 259: Chapter 8 Handling AJAX callbacks s
Page 260 and 261: Chapter 8 As a result, we cannot tr
Page 262 and 263: Chapter 8 This allows us to pass a
Page 264 and 265: Node Access Out-of-the-box, Drupal
Page 266 and 267: Chapter 9 The Node Access API allow
Page 268 and 269: * - "delete" * - "create" * @param
Page 270 and 271: Chapter 9 if (!user_access('access
Page 272 and 273: Chapter 9 } if (module_implements('
Page 274 and 275: Chapter 9 hook_node_access() is the
Page 276 and 277: Chapter 9 Note that the {node_acces
Page 278 and 279: Chapter 9 The basic permission 'cre
Page 282 and 283: Chapter 9 On node listing pages, th
Page 284 and 285: Chapter 9 Writing a complete node a
Page 286 and 287: • Can this user bypass node acces
Page 288 and 289: Chapter 9 For our test module, we w
Page 290 and 291: Chapter 9 When hook_node_access_rec
Page 292 and 293: Chapter 9 A few things to consider
Page 294 and 295: Chapter 9 Security considerations T
Page 296 and 297: Chapter 9 Rebuilding the {node_acce
Page 298 and 299: Chapter 9 Using the new hook_node_a
Page 300 and 301: Chapter 9 We may alter any element
Page 302 and 303: Chapter 9 } // Check anonymous user
Page 304 and 305: Chapter 9 // Check the permission.
Page 306 and 307: Chapter 9 The key to Devel Node Acc
Page 308 and 309: Chapter 9 In the preceding case, th
Page 310 and 311: JavaScript in Drupal JavaScript is
Page 312 and 313: Chapter 10 Adding JavaScript and CS
Page 314 and 315: Chapter 10 When a JavaScript librar
Page 316 and 317: The following code adds a system CS
Page 318 and 319: Chapter 10 The second argument can
Page 320 and 321: Chapter 10 From here onwards, when
Page 322 and 323: Chapter 10 If a renderable array is
Page 324 and 325: Chapter 10 Drupal specific JavaScri
Page 326 and 327: Chapter 10 There are three ways var
Page 328 and 329: 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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