Drupal 7

The following lists all the permissions available in Drupal.

During testing phase of the system, there are WSOD for whom no logs are available. Devel is one option, but for knowing just what might be the reason, the following changes in the settings.php file will reveal any error that occured.

Features Update: Update a feature module on your site. This updates the feature module in the site if the components are overriden

Features Revert: Revert a feature module on your site. Reverts the basic configuration in the module onto the site removing any custom configurations made at the database end.

To render a Drupal CCK form in a template file, add the following lines in the currently enabled theme. Assuming the enabled theme to be footheme

For a cck form called external_exam, the theme function can be used to provide a template file called external_exam_form.tpl.php under templates directory.

<?php
function footheme_theme() {
  return array(
    'external_exam_node_form' => array(
      'arguments' => array('form' => NULL),
      'template' => 'templates/external_exam_form',
      'render element' => 'form'
    ),
  );
}
?>

Sometimes we need to render a field when we have a node object containing field values.

field_view_value is a Drupal API that allows us to render any field. Example: Display the Invoice Description Field in a Node Object. The display would take care of any input filter that is applied in the field

<?php
$invoice_description = field_get_items('node', $node, 'field_invoice_description');
print render(field_view_value('node', $node, 'field_invoice_description',$invoice_description[0]));
?>

The other way to display the label and data completely rendered by Drupal.

<?php

Installation and Configuration of Memcached Daemon and PECL Memcache in Ubuntu for Drupal 7

Steps:

1. Install memcached in the server

Latest dev Version of Memcache can be installed via.

2. Add memcache.ini in PHP conf.d directory

HighCharts is a charting library tool made freely available for non commercial usage. Drupal HighCharts 2.x has no other module dependency except that HighCharts library needs to be downloaded from here. There are a huge variety of options made available in HighCharts API which can be used for manipulation and for additional info.

The example below is a Line Chart uses Drupal HighCharts version 2.x

<?php
/* Render Line Charts using Drupal Highcharts 2.x */
function jicustom_chart_render($chart_arr){

$options = new stdClass();

Sometimes when we visit a link, specially on mobile, there is a situation when we place a link and reaching a page clicking that link leads to a situation where the jQuery library is not loaded into the browser. This could affect conditional fields and other jQuery widgets.

--
Source
http://stackoverflow.com/questions/10389751/jquery-mobile-page-load-issue

Using views_pre_render hook one can alter the output of a view

<?php
/**
* Implements hook_views_pre_render().
*/
function jicustom_views_pre_render(&$view) {
if($view->name=='stock_report'){
$results = $view->result;
foreach ($results as $key => $result) {
$collection_name = $result->field_collection_item_field_name;
if($collection_name == 'field_transaction_items_outgoing'){
//Modify output
$results[$key]->field_field_trans_item_quantity[0]['rendered']['#markup'] = -($result->field_field_trans_item_quantity[0]['raw']['value']);
}

If you have a CCK Select field and you would want to extract the various options available in that field via custom code, the following lines help you achieve that.