Drupal 7 Module Development

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Enabling modules Just like modules can be dependencies of other modules, modules can be set as dependencies of a profile. All dependent modules will be enabled as part of the install process. The difference between module dependencies and profile dependencies is that profile dependencies can be disabled without disabling the profile. Chapter 12 To add a dependency to a profile, use the dependencies field in the .info file. Here is an example from our store.info file of the modules we want enabled: dependencies[] = block dependencies[] = comment dependencies[] = contact dependencies[] = contextual dependencies[] = dashboard dependencies[] = help dependencies[] = image dependencies[] = menu dependencies[] = path dependencies[] = taxonomy dependencies[] = dblog dependencies[] = search dependencies[] = shortcut dependencies[] = toolbar dependencies[] = overlay dependencies[] = field_ui dependencies[] = file dependencies[] = rdf By default, the field, field SQL storage, filter, list, node, number, options, system, text, and user modules are enabled. Any other modules you want enabled need to be listed in the .info file for the profile. Ensuring profile dependencies Since dependencies of profiles can be disabled, profiles that rely on dependencies should ensure that a module is enabled before acting on it. The function module_exists() can be used to test if a module is both installed and enabled. For more details on module_exists() see http://api.drupal.org/api/function/module_exists/7. [ 347 ]
Installation Profiles The install task system The <strong>Drupal</strong> installer is task based. Tasks consist of steps to collect information and act on it. For example, three of the core tasks are to collect the database configuration details, write the database configuration to the settings.php file, and install the modules. <strong>Drupal</strong> core provides a set of default tasks for the installer to run that an installation profile can add to or alter. The two hooks that provide access to the install tasks are: • hook_install_tasks(): This allows the profile to add tasks at the end of the default tasks • hook_install_tasks_alter(): This allows the profile to alter all the tasks including those provided as defaults by the installer For the first step of the installer, an installation profile is selected. This step cannot be altered by an installation profile. Choosing an install task or using hook_install Since profiles operate as a module, they can have a .install file containing a hook_install() which will be called when the profile is installed. This leaves two choices of where to perform configuration tasks. There are two main differences between these two types of tasks: • The profile hook_install() is run before custom install tasks and the site configuration form. • Tasks in the installer can have forms, utilize the Batch API, and more. hook_install() can only run as a callback in a single page load. For complete documentation regarding hook_install() visit the API documentation at http://api.drupal.org/api/function/hook_ install/7. Anatomy of an install task There are five properties to describe each task step to the installer. hook_install_tasks() describes each step to the installer as a keyed array. The key is a unique name to a callback function that executes the task. The properties of each item describing the task are as follows: [ 348 ]
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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
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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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Page 366 and 367: Installation Profiles This chapter
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Page 386 and 387: Database Access Although Drupal 7 h
Page 388 and 389: Appendix A Result objects The retur
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Page 392 and 393: [ 369 ] Appendix A The db_insert()
Page 394 and 395: Appendix A A Merge query says, in e
Page 396 and 397: Appendix A Slave servers Drupal als
Page 398 and 399: Security Throughout this book, we h
Page 400 and 401: Filtering The following guidelines
Page 402 and 403: First, whenever we write a query ag
Page 404: Appendix B There are both RSS feeds
Page 407 and 408: ajax_command_alert command 309 ajax
Page 409 and 410: Drupal, subsytems blocks 20 code te
Page 411 and 412: form handling 229 forms access chec
Page 413 and 414: K key() method 371 L label property
Page 415 and 416: evision handling 175 revisions hand
Page 417 and 418: U unit test 49 update queries 370 u
Page 419 and 420: Drupal 7 ISBN: 978-1-84951-286-2 Pa
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