Is there a way to add a custom field in the POST request from the front end?

Gantt
#1

Is there a way to add an additional field inside the data like “project_id : <project_id value>”:

var dp = gantt.createDataProcessor(function(entity, action, data, id) {
    var server = "/api/v1/";
    switch(action) {
      case "create":
        return gantt.ajax.post({
            url: server  + entity,
            data: data,
            // insert "project_id: project_id" inside <data>
        });
        gantt.refreshData();
        break;
#2

Hi @keithmanilla !

You can add custom parameters to all requests sent by the data processor, using the payload property of the setTransactionMode parameter like this:

dp.setTransactionMode({
    mode:"POST",
    headers:{
        "Content-Type": "application/x-www-form-urlencoded",
        "Accept-Language": "fr-FR"
    },
    payload:{
       "project_id": "project_id"
    }
}, true);

https://docs.dhtmlx.com/api__dataprocessor_settransactionmode.html
https://docs.dhtmlx.com/gantt/desktop__server_side.html#customrequestheadersandparameters

Alternativley if you use dataProcessor to manage updates, you can add these values in onBeforeUpdate event handler

var dp = gantt.createDataProcessor(...);

dp.attachEvent("onBeforeUpdate", function(id, state, data){
    data.project_id = &lt;project_id value&gt;;
    return true;
});

https://docs.dhtmlx.com/api__dataprocessor_onbeforeupdate_event.html

And when you load data to the gantt via gantt.load, you’ll need to add a parameter directly to the request url, since gantt.load is not affected by the dataProcessor:

gantt.load("data?project_id=123");
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