Panels as a collection of views/panes make META, RDF and Schema.org data disappear

The schema.org isn't a requirement to reproduce this bug since it leverages the core RDF API and in particular the RDFa markup that @cesareaugusto was expecting to find in its pages. In other words, simply installing Drupal 7 (standard profile) is enough to have some RDFa markup in the regular node pages (search for the @property attribute for example), which is missing from the output @cesareaugusto is talking about.

I believe the issue is that these things produce their output via hook_node_view -- in order for this to run you must add the 'node: content' pane.

This is a known issue, but a proper solution hasn't arisen yet. One potential solution is to run this using hook_ctools_render_alter()

Have anyone successfully fixed this using hook_ctools_render_alter() ?

You can workaround it by overriding your layout's template file, which is found in modules/panels/plugins/layouts . Although not documented, you can use the $variables variable inside. See the attached file for 2 col brick layout example.
Note that I didn't test this thoroughly, but my feeling is that this is the way to go

I am trying to show microtags on my pages which are built using views and panels.
Which template file would I need to override to add the following ?

I've already created a panels page using the interface. How do I wrap the entire code in a

tag AFTER ALL the panes?

Is using plugins/layouts/ the way to go?
Thanks

@minsky The overriding you suggested does not serve the full purpose. No doubt this added some properties on the top of the content. I am using the schema properties on a content type recipe. I have override my template file as

<div class="column column-main" id="content" about="<?php print $variables['display']->context['argument_entity_id:node_1']->data->type.'/'.$variables['display']->context['argument_entity_id:node_1']->data->title ;?>" typeof="<?php print implode($variables['display']->context['argument_entity_id:node_1']->data->rdf_mapping['rdftype'], " ");?>">
<span rel="schema:url" resource="<?php print $variables['display']->context['argument_entity_id:node_1']->data->type.'/'.$variables['display']->context['argument_entity_id:node_1']->data->title ;?>" class="rdf-meta"></span>
<span property="schema:name" content="<?php print $variables['display']->context['argument_entity_id:node_1']->data->title ;?>" class="rdf-meta"></span>
    <?php print $content['main']; ?>
  </div>

This outputs the schema properties like typeof and url, but the schema property is not added on other fields like

1. Preparation time
2. Cooking time
3. Yields
4. ingredients
5. Cooking directions

Here is what I used for a fix, if it's helpful to others:

function hook_preprocess_panels_pane(&$vars) {
  $pane = $vars['pane'];
  $display = $vars['display'];

  if ($pane->type != 'token' || strpos($pane->subtype, 'node') === FALSE) {
    return;
  }

  $node = $display->context[$pane->configuration['context']]->data;
  // The field name is hiding in the panel subtype.
  list($entity_type, $field_name) = explode(':', $pane->subtype);
  $field_name = str_replace('-', '_', $field_name);

  // If we have no schema.org data to add, abort.
  if (!isset($node->rdf_mapping[$field_name])) {
    return;
  }

  // It's finally time to add the schema.org data!
  $attributes = rdf_rdfa_attributes($node->rdf_mapping[$field_name]);
  $vars['attributes_array'] += $attributes;
}

I committed a fix for this in the RDFa module which requires a slight modification of Panels templates, see patch attached. This patch merely aligns the layout tpls to correspond to those of core, but outputting $attributes in the top level HTML element, exactly like node.tpl.php.

Together with https://www.drupal.org/project/rdfa, this patch takes care of the approach described in #5, #7 and #8. It only works for nodes at the moment, but I plan to add support for user, taxonomy term etc if the feedback is good.

To try this patch:
- Make sure you have set up RDF mappings for your content type, for example using https://drupal.org/project/schemaorg
- install the latest version of https://www.drupal.org/project/rdfa
- apply this patch to your version of Panels

To verify that this patch is working well, you can see if you have this kind of markup at the top of your layout:

<div class="panel-2col-stacked clearfix panel-display" typeof="schema:Recipe" resource="/node/2">

There should also be this new HTML element near the bottom of your Panels layout:

<span content="title of my node" property="dc:title" class="rdf-meta"></span>

Positive and negative feedback are both appreciated.

Regarding #8 specifically:

This outputs the schema properties like typeof and url, but the schema property is not added on other fields like

I tried the recipe module with my patch, and all the fields had the correct markup, including the yield/cooking time block. Note that I selected the recipe fields one by one in the Panels UI:
- node:recipe description
- node:recipe ingredients
- Recipe summary (located in the Miscellaneous tab of the "add content" popup)

I forgot to cover the case of the flexible layout. Here it is now in this patch.

First off, Metatag has had a work-around for this for the past two-or-so years.

Secondly, it should no longer be an issue due to #1760384: Update node_view.inc to execute the normal Drupal hooks and related changes in CTools.

Please retest whether this is still broken with CTools 3.5 or a current dev snapshot.

What do you mean CTools 3.5? CTools is currently on 7.x-1.7 ...

Sorry, I was mixed up between Panels and CTools, please test with CTools 7.x-1.7.

I tried this with ctools-7.x-1.7 and this issue still exists. I tried this with ctools-7.x-1.x-dev and it seemed to resolve the issue. So once the latest version of ctools is released (7.x-1.7+18-dev 2015-May-16 version, at the time of this writing) this issue should be resolved. Until then, no luck unless you want to run the dev release.

According to the git history, the fix #1760384: Update node_view.inc to execute the normal Drupal hooks was first released in ctools 7.x-1.6 so it should be in 1.7 too. Are you sure it's not working in 1.7 but working in the dev release? How are you testing this?

I'm sorry. I was mistaken. I was able to get this to work with 1.7. But the results weren't very good so they weren't being parsed correctly by the Structured Data Testing Tool. I wound up using the microdata module with much better success.

#10 does not work on my site

@JayShoe, do you have any links to tutorials for microdata module? I note that it is minimally maintained and will have no further development. I tried using it on a site using Panels but found it hard to configure, and was never able to get it successfully configured. When I tested the content in the Structured Data Testing Tool I was constantly getting errors thrown back at me.

Having the same problem, but panels is making Schema.org data disappear on my amp pages.