Drupal API

The idea is to modify another CCK field based on selection of an item via a select list in another field.

Let us consider a content type called article containing 2 additional fields: article_test_entity - which is an entity reference that displays node titles of all nodes and article_test_entity_type - which is a select list that contains Content Type names list with its key as the actual machine name of the content type. The idea is to restrict the list of node titles displayed on article_test_entity based on the content type selected via article_test_entity_type.

<?php

/*

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

Get the filename URI path from the dir_name located under public files directory.
Save data in the destination. If file exists with the name, replace
Get the download link.

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();

Create a flag link for a user:

<?php
print flag_create_link('user_flagname', $user_uid);
?>

Get Flag of a Type and see if it is flagged for a node and not the number of times it got flagged.

<?php
$flag = flag_get_flag('bookmarks') or die('no "bookmarks" flag defined');
if ($flag->is_flagged($node->nid)) {
  print "This node is bookmarked!";
}
print "The number of people who voted for this proposal:";
print $flag->get_count($node->nid);  // 
?>

Flagging or Unflagging an item:
You use the $flag->flag() method to either flag or unflag an item. Example:

<?php

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']);
}

An easier way of getting difference between dates is achieved using the DateObject provided by Drupal.

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.