Bryntum Support Forums

Hi,

Currently we are sending the JSON data to the ProjectModel using loadInlineData and using our own engine calculations to update the JSON such that whenever a change is made, we generate the new JSON and replace the ProjectModel. The downside with this approach is that there is a lot of waiting time for any change.
Is it possible to compare the changes between the 2 JSON objects and only apply the changes rather than the whole project?

Thanks,
Nagaraju

Hi Nagaraju,

Please check this: https://bryntum.com/docs/gantt/#Core/data/mixin/StoreSync#config-syncDataOnLoad

Configure with true to sync loaded data instead of replacing existing with a new dataset.

Also we have Dynamic Response Type which may be enabled using https://bryntum.com/docs/gantt/#Scheduler/crud/AbstractCrudManagerMixin#config-trackResponseType that allows to manage response type. After set it on true, use https://bryntum.com/docs/gantt/#Gantt/model/ProjectModel#function-loadCrudManagerData to load your data. Be aware to update response object format as it described in our guide: https://bryntum.com/docs/gantt/#guides/data/crud_manager.md#loading-data
Example:

{
        "success"     : true,
        "requestId"   : 123,
        "type"      : "sync",
        "revision"    : 5,

    "books"       : {
        "rows" : [
            { "id" : 65, "title" : "War and Peeace", "published" : 1826, "added_dt" : "2019-01-01T00:00:00", "updated_dt" : null },
            { "id" : 9000, "title" : "The Last of the Mohicans", "published" : 1869, "added_dt" : "2019-01-01T00:00:00", "updated_dt" : null },
            { "id" : 9001, "title" : "The Last of the Mohicans", "published" : 1869, "added_dt" : "2019-04-25T13:56:17", "updated_dt" : null }
        ],
        "metaData" : {
            "most-popular-book-id" : 9000
        },
        "total" : 5
    },

    "writers"      : {
        "rows" : [
            { "id" : 1, "name" : "Leo", "surname" : "Tolstoy" },
            { "id" : 2, "name" : "James Fenimore", "surname" : "Cooper" }
        ],
        "total" : 2
    },

    "authors"      : {
        "rows" : [
            { "id" : 1, "book_id" : 65, "writer_id" : 1 },
            { "id" : 2, "book_id" : 9000, "writer_id" : 2 },
            { "id" : 3, "book_id" : 9001, "writer_id" : 2 }
        ],
        "total" : 2
    }
}

The guide is here: https://bryntum.com/docs/gantt/#guides/data/crud_manager.md#dynamic-response-type

All the best,
Alex

Hi Alex,

Thanks for the reply, The solution is working quite well, but we are facing the same problem as in this post: viewtopic.php?f=51&t=15922

I have set repopulateOnDataset : false, and the error still persists.
On checking gantt.umd.js, I found that the property 'repopulateOnDataset' is set as 'repopulateOnDataSet' (Capital "S"). Updating this property prevented the errors.

After changing this, syncDataOnLoad works very well for taskStore:

this.gantt.project.taskStore.data = this.bryntumService.bryntumTree.tasks.rows;

but it causes a crash for the other stores:

this.gantt.project.dependencyStore.data = this.bryntumService.bryntumTree.dependencies.rows;
this.gantt.project.resourcesData.data = this.bryntumService.bryntumTree.resources.rows;
this.gantt.project.assignmentsData.data = this.bryntumService.bryntumTree.assignments.rows;

Is there a specific change to be given for the other stores?

Thanks,
Nagaraju

Yes, this is a known bug. The related issues:

https://github.com/bryntum/support/issues/1913
https://github.com/bryntum/support/issues/1967

Hi,

Would the upcoming Gantt 4.1.0 release contain the property change from "repopulateDataSet" to "repopulateDataset" (Capital "S")?

Thanks,
Nagaraju

We will fix that. Thank for pointing out!