Posted by SseggembeMoses on March 1, 2016 at 11:34am
I have a content type called districts and i have created the following fields
- district geojson(polygon values)
- harzards (list) - heavy rain, freezing rain, storm
- Alert level (list) - extreme, high, low
I am displaying in a view as a leaflet map. Now i would like to write a custom module that can get the field content of a node ie harzards and alert level and then pass them to a javascript file that will print specific colors to the districts in the view depending on the alert_level.
What is the best way to get the field content (harzards and alert_level) in to the custom module and then pass them to the javascript file? And what function am I to use?
Or is there another way of achieving this.
Comments
You can achieve what you
You can achieve what you described with open layers
Let me try it out
Let me try it out
Tech-256
Custom menu item outputting JSON
Hi. Sorry this is late.
Assuming Drupal 7, this is how I would approach this.
1. Menu item in Custom module
function module_menu() {
$items['get-district-data'] = array (
'page callback' => 'module_get_district_data',
'type' => MENU_CALLBACK,
);
return $items;
}
function module_get_district_data() {
/** two options here,
* - you can get node results from the same displayed view
* - OR just load all nodes of district type - let's go with this one
*
* - use db_query instead of EntityFieldQuery - faster
*
*/
$query_result = db_query("SELECT nid FROM {node} WHERE type = :nodeType", array(':nodeType' => 'project'))->fetchAllKeyed(0,0);
$district_nodes = node_load_multiple(array_keys($query_result));
$districts_json = array();
foreach ($district_nodes as $district_node) {
$district = entity_metadata_wrapper('node', $district_node);
$districts_json = array(
'nid' => $district->nid,
'hazard' => $district->field_hazard->raw(),
'alert' => $district->field_alert_level->raw()
);
}
drupal_json_output($districts_json);
}
2. Call JSON using jQuery/javascript
var districtJSON = $.getJSON('get-district-data');Does this make sense?
Thanks for the solution. I
Thanks for the solution.
I had already found a solution using Leaflet.js( with some codding). But i will also try out this solution, it looks solid. Thanks for your time bro.
Tech-256