- Patch #613272 by Kevin Hankens, Dave Reid, yoroy, rgristroph, pcarman: forums not usable out-of-the-box: disabled comments, no forums.

modules/forum/forum.install

@@ -20,6 +20,9 @@ function forum_install() {
   variable_set('node_options_forum', array('status'));
 }
 
+/**
+ * Implements hook_enable().
+ */
 function forum_enable() {
   // Create the forum vocabulary if it does not exist.
   $vocabulary = taxonomy_vocabulary_load(variable_get('forum_nav_vocabulary', 0));
@@ -66,6 +69,16 @@ function forum_enable() {
     field_create_instance($instance);
 
     variable_set('forum_nav_vocabulary', $vocabulary->vid);
+
+    // Create a default forum so forum posts can be created.
+    $edit = array(
+      'name' => t('General discussion'),
+      'description' => '',
+      'parent' => array(0),
+      'vid' => $vocabulary->vid,
+    );
+    $term = (object) $edit;
+    taxonomy_term_save($term);
   }
 }
 

modules/forum/forum.module

@@ -307,6 +307,10 @@ function forum_node_validate($node, $form) {
           continue;
         }
         $term = taxonomy_term_load($item['tid']);
+        if (!$term) {
+          form_set_error('taxonomy_forums', t('Select a forum.'));
+          continue;
+        }
         $used = db_query_range('SELECT 1 FROM {taxonomy_term_data} WHERE tid = :tid AND vid = :vid',0 , 1, array(
           ':tid' => $term->tid,
           ':vid' => $term->vid,

modules/forum/forum.test

@@ -35,6 +35,11 @@ class ForumTestCase extends DrupalWebTestCase {
    * Login users, create forum nodes, and test forum functionality through the admin and user interfaces.
    */
   function testForum() {
+    //Check that the basic forum install creates a default forum topic
+    $this->drupalGet("/forum");
+    // Look for the "General discussion" default forum
+    $this->assertText(t("General discussion"), "Found the default forum at the /forum listing");
+
     // Do the admin tests.
     $this->doAdminTests($this->admin_user);
     // Generate topics to populate the active forum block.
@@ -94,11 +99,22 @@ class ForumTestCase extends DrupalWebTestCase {
    * Forum nodes should not be created without choosing forum from select list.
    */
   function testAddOrphanTopic() {
+    // Must remove forum topics to test creating orphan topics.
+    $vid = variable_get('forum_nav_vocabulary');
+    $tree = taxonomy_get_tree($vid);
+    foreach($tree as $term) {
+      taxonomy_term_delete($term->tid);
+    }
+
+    // Create an orphan forum item.
     $this->drupalLogin($this->admin_user);
     $this->drupalPost('node/add/forum', array('title' => $this->randomName(10), 'body[' . LANGUAGE_NONE .'][0][value]' => $this->randomName(120)), t('Save'));
 
     $nid_count = db_query('SELECT COUNT(nid) FROM {node}')->fetchField();
-    $this->assertEqual(0, $nid_count, t('A forum node was not created.'));
+    $this->assertEqual(0, $nid_count, t('A forum node was not created when missing a forum vocabulary.'));
+
+    // Reset the defaults for future tests.
+    module_enable(array('forum'));
   }
 
   /**