Creating a Node Module
1．Creating the .info File
Let’s also create the joke.info file and add it to the joke folder.
; $Id$
name = Joke
description = Provides a joke node type with a punchline.
version = "$Name$"
2．Creating the .install File
<?php
function joke_install() {
switch ($GLOBALS['db_type']) {
case 'mysql':
case 'mysqli':
db_query("CREATE TABLE {joke} (
nid int unsigned NOT NULL default '0',
vid int unsigned NOT NULL default '0',
punchline text NOT NULL,
PRIMARY KEY (nid,vid),
UNIQUE KEY vid (vid),
KEY nid (nid)
) /*!40100 DEFAULT CHARACTER SET UTF8 */ ");
break;
case 'pgsql':
db_query("CREATE TABLE {joke} (
nid int unsigned NOT NULL default '0',
vid int unsigned NOT NULL default '0',
punchline text NOT NULL,
PRIMARY KEY (nid,vid),
UNIQUE KEY vid (vid),
KEY nid (nid)
)");
break;
}
}
function joke_uninstall() {
db_query('DROP TABLE {joke}');
}
3．Creating the .module File
<?php
function joke_perm() {
return array('create joke', 'edit joke', 'delete joke');
}
/**
* @file
* Provides a "joke" node type.
*/
/**
* Implementation of hook_node_info().
*/
function joke_node_info() {
// We return an array since a module can define multiple node types.
// We're only defining one node type, type 'joke'.
return array(
'joke' => array(
'name' => t('Joke'), // Required.
'module' => 'joke', // Required.
'description' => t('Tell us your favorite joke!'), // Required.
'has_title' => TRUE,
'title_label' => t('Title'),
'has_body' => TRUE,
'body_label' => t('Joke'),
'min_word_count' => 2,
'locked' => TRUE
)
);
}
function joke_menu($may_cache) {
$items = array();
if ($may_cache) {
$items[] = array(
'path' => 'node/add/joke',
'title' => t('Joke'),
'access' => user_access('create joke'),
);
}
return $items;
}
function joke_access($op, $node) {
global $user;
if ($op == 'create') {
return (user_access('create joke'));
}
if ($op == 'update') {
return (user_access('edit joke') && ($user->uid == $node->uid));
}
if ($op == 'delete') {
return (user_access('delete joke') && ($user->uid == $node->uid));
}
}
function joke_form($node) {
// Get metadata for this node type
// (we use it for labeling title and body fields).
// We defined this in joke_node_info().
$type = node_get_types('type', $node);
$form['title'] = array(
'#type' => 'textfield',
'#title' => check_plain($type->title_label),
'#required' => TRUE,
'#default_value' => $node->title,
'#weight' => -5
);
$form['body_filter']['body'] = array(
'#type' => 'textarea',
'#title' => check_plain($type->body_label),
'#default_value' => $node->body,
'#rows' => 7,
'#required' => TRUE
);
$form['body_filter']['filter'] = filter_form($node->format);
$form['punchline'] = array(
'#type' => 'textfield',
'#title' => t('Punchline'),
'#required' => TRUE,
'#default_value' => $node->punchline,
'#weight' => 5
);
return $form;
}
function joke_validate($node) {
//Enforce a minimum word length of 3.
if (isset($node->punchline) && str_word_count($node->punchline) <= 3) {
$type = node_get_types('type', $node);
form_set_error('punchline', t('The punchline of your @type is too short. You need at least three words.', array('@type'=> $type->name)));
}
}
function joke_insert($node) {
db_query("INSERT INTO {joke} (nid, vid, punchline) VALUES (%d, %d, '%s')",
$node->nid, $node->vid, $node->punchline);
}
function joke_update($node) {
if ($node->revision) {
joke_insert($node);
} else {
db_query("UPDATE {joke} SET punchline = '%s' WHERE vid = %d", $node->punchline, $node->vid);
}
}
/**
* Implementation of hook_delete().
*/
function joke_delete(&$node) {
// Delete the related information we were saving for this node.
db_query('DELETE FROM {joke} WHERE nid = %d', $node->nid);
}
/**
* Implementation of hook_load().
*/
function joke_load($node) {
drupal_add_js('misc/collapse.js');
return db_fetch_object(db_query('SELECT punchline FROM {joke} WHERE vid = %d', $node->vid));
}
function joke_view($node, $teaser = FALSE, $page = FALSE) {
if (!$teaser) {
// Use Drupal's default node view.
$node = node_prepare($node, $teaser);
$node->guffaw = str_repeat(t('Ha!'), mt_rand(0, 10));
// Now add the punchline.
/**
$node->content['punchline'] = array(
'#value' => theme('joke_punchline', $node),
'#weight' => 2
);
*/
}
if ($teaser) {
// Use Drupal's default node view.
$node = node_prepare($node, $teaser);
}
return $node;
}
function theme_joke_punchline($node) {
$output = '<div class="joke-punchline">'.check_plain($node->punchline). '</div><br />';
$output .= '<div class="joke-guffaw">'.check_plain($node->guffaw). '</div>';
return $output;
}
posted on 2007-12-04 09:28
周锐 阅读(304)
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