11 将配置好的Views导出到代码里面
作者：老葛，北京亚艾元软件有限责任公司，http://www.yaiyuan.com
由于前面，我们新增了编辑、删除两个链接，所以我们可以将字段“Breadcrumb: Breadcrumb ID (Breadcrumb ID)”和“Global: Custom text (Edit)”删除掉了。同时，将每页显示的10条，改为显示30条；设置“无结果行为”，无结果时显示信息“No breadcrumbs available.”；然后保存视图。
我们在实际的项目中，也经常需要将配置好的Views导出成代码的形式点击这里的导出链接即可
系统会为我们自动生成好代码。如下图所示：
我们将这里的代码复制下来，然后打开breadcrumb2.views.inc文件，在里面在里面添加钩子函数breadcrumb2_views_default_views，中间的部分，就是我们复制过来的：
/**
* Implements hook_views_default_views().
*/
function breadcrumb2_views_default_views() {
$view = new view();
$view->name = 'breadcrumbs';
$view->description = '';
$view->tag = 'default';
$view->base_table = 'breadcrumb';
$view->human_name = 'Breadcrumbs';
$view->core = 7;
$view->api_version = '3.0';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
/* Display: Master */
$handler = $view->new_display('default', 'Master', 'default');
$handler->display->display_options['use_more_always'] = FALSE;
$handler->display->display_options['access']['type'] = 'none';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'full';
$handler->display->display_options['pager']['options']['items_per_page'] = '30';
$handler->display->display_options['pager']['options']['offset'] = '0';
$handler->display->display_options['pager']['options']['id'] = '0';
$handler->display->display_options['pager']['options']['quantity'] = '9';
$handler->display->display_options['style_plugin'] = 'table';
$handler->display->display_options['style_options']['columns'] = array(
'bid' => 'bid',
);
$handler->display->display_options['style_options']['default'] = '-1';
$handler->display->display_options['style_options']['info'] = array(
'bid' => array(
'sortable' => 0,
'default_sort_order' => 'asc',
'align' => '',
'separator' => '',
'empty_column' => 0,
),
);
/* No results behavior: Global: Text area */
$handler->display->display_options['empty']['area']['id'] = 'area';
$handler->display->display_options['empty']['area']['table'] = 'views';
$handler->display->display_options['empty']['area']['field'] = 'area';
$handler->display->display_options['empty']['area']['empty'] = TRUE;
$handler->display->display_options['empty']['area']['content'] = 'No breadcrumbs available.';
$handler->display->display_options['empty']['area']['format'] = 'filtered_html';
/* Field: Breadcrumb: path */
$handler->display->display_options['fields']['path']['id'] = 'path';
$handler->display->display_options['fields']['path']['table'] = 'breadcrumb';
$handler->display->display_options['fields']['path']['field'] = 'path';
/* Field: Breadcrumb: Breadcrumb Link */
$handler->display->display_options['fields']['link']['id'] = 'link';
$handler->display->display_options['fields']['link']['table'] = 'field_data_link';
$handler->display->display_options['fields']['link']['field'] = 'link';
$handler->display->display_options['fields']['link']['click_sort_column'] = 'url';
$handler->display->display_options['fields']['link']['delta_offset'] = '0';
$handler->display->display_options['fields']['link']['separator'] = ' ? ';
/* Field: Breadcrumb: Delete Link */
$handler->display->display_options['fields']['delete_breadcrumb']['id'] = 'delete_breadcrumb';
$handler->display->display_options['fields']['delete_breadcrumb']['table'] = 'breadcrumb';
$handler->display->display_options['fields']['delete_breadcrumb']['field'] = 'delete_breadcrumb';
$handler->display->display_options['fields']['delete_breadcrumb']['label'] = '';
$handler->display->display_options['fields']['delete_breadcrumb']['element_label_colon'] = FALSE;
/* Field: Breadcrumb: Edit Link */
$handler->display->display_options['fields']['edit_breadcrumb']['id'] = 'edit_breadcrumb';
$handler->display->display_options['fields']['edit_breadcrumb']['table'] = 'breadcrumb';
$handler->display->display_options['fields']['edit_breadcrumb']['field'] = 'edit_breadcrumb';
$handler->display->display_options['fields']['edit_breadcrumb']['label'] = '';
$handler->display->display_options['fields']['edit_breadcrumb']['element_label_colon'] = FALSE;
/* Sort criterion: Breadcrumb: Breadcrumb ID */
$handler->display->display_options['sorts']['bid']['id'] = 'bid';
$handler->display->display_options['sorts']['bid']['table'] = 'breadcrumb';
$handler->display->display_options['sorts']['bid']['field'] = 'bid';
$handler->display->display_options['sorts']['bid']['order'] = 'DESC';
/* Filter criterion: Breadcrumb: path */
$handler->display->display_options['filters']['path']['id'] = 'path';
$handler->display->display_options['filters']['path']['table'] = 'breadcrumb';
$handler->display->display_options['filters']['path']['field'] = 'path';
$handler->display->display_options['filters']['path']['operator'] = 'contains';
$handler->display->display_options['filters']['path']['exposed'] = TRUE;
$handler->display->display_options['filters']['path']['expose']['operator_id'] = 'path_op';
$handler->display->display_options['filters']['path']['expose']['label'] = 'path';
$handler->display->display_options['filters']['path']['expose']['operator'] = 'path_op';
$handler->display->display_options['filters']['path']['expose']['identifier'] = 'path';
$handler->display->display_options['filters']['path']['expose']['remember_roles'] = array(
2 => '2',
1 => 0,
3 => 0,
);
$views[$view->name] = $view;
return $views;
}
最后的两行代码，是我们人工添加进来的。我们需要返回一个$views数组。我建议大家熟悉一下，这里导出的代码。我们以前在做项目的时候，有时候会遇到这种情况，一下子列出所有的条目，此时带有预览功能，系统会读取所有的条目，而条目数太大，以至于超出了PHP的内存限制，所以此时进入不了视图的编辑页面，此时我们可以将视图导出，然后修改导出后的代码，修改过后，一页显示10条记录，然后再导入这个视图的代码，就解决了问题。
此外，需要注意的是，Views无法导出特殊字符的，我们在Views里面，配置的时候，使用了“»”这个符号，导出的时候，变成了“？”，因为它是特殊字符。此时，我们可以将文件的编码格式转为UTF-8，然后将分隔符设置为“ » ”：
$handler->display->display_options['fields']['link']['separator'] = ' » ';
不过现在清空缓存，我们的代码无法被识别出来，删除链接还是删除链接，如果我们删除了刚才定义的views，就无法恢复回去。我经过很长时间的测试，调试，最后发现，如果将函数breadcrumb2_views_default_views放到breadcrumb2.module文件中来，就起作用，否则的话，就不起作用，最后，我向breadcrumb2.module文件，直接添加以下代码：
include_once DRUPAL_ROOT . '/' . drupal_get_path('module', 'breadcrumb2') . '/views/' . 'breadcrumb2.views.inc';
就是当加载module文件的时候，自动的加载breadcrumb2.views.inc，现在我们清除缓存，就只能revert（恢复）我们的视图了，无法删除它了。
我检查了model的代码，我的代码和它基本上完全一样的，但是在model里面，就不需要这个include_once。以前导出代码的时候，也从来不用这个的，Views会自动的加载这个文件。我不知道哪里出了问题。这个问题，就留在将来解决吧，反正现在问题不大。
我们这里只需要记住，将导出的代码放到hook_views_default_views的这个钩子函数中，并在函数最后，增加以下两个代码即可：
$views[$view->name] = $view;
return $views;