Answered Custom TV - How to save data without using MODExt

You can put placeholder tags for the current values in the form and set them in a snippet that runs when the form loads.

That way, the current values for all fields will be saved unless the user changes something.

Quote from: BobRay at Feb 17, 2014, 01:02 PM

You can put placeholder tags for the current values in the form and set them in a snippet that runs when the form loads.

That way, the current values for all fields will be saved unless the user changes something.

Hi Bob, that is an idea, I saw there is already a hidden field with something like "tvdef1" (integer increases depending on where the tv is placed). But is there no way I can use MODext to create an object for my own TV with my values and have it save it on form submit?

I'm sure you can do that, but how would modExt know what the TV's value is? It's running in your browser and has no easy way of finding out the TV's value. That means you would have to either create a processor to get the TV value and make an Ajax call to it, or use PHP to modify the modxExt code before it gets to the browser.

In either case, just having a snippet set a placeholder with the TV value would be a lot easier and more efficient. Here's the entire snippet:

Quote from: BobRay at Feb 18, 2014, 12:16 PM

I'm sure you can do that, but how would modExt know what the TV's value is? It's running in your browser and has no easy way of finding out the TV's value. That means you would have to either create a processor to get the TV value and make an Ajax call to it, or use PHP to modify the modxExt code before it gets to the browser.

In either case, just having a snippet set a placeholder with the TV value would be a lot easier and more efficient. Here's the entire snippet:

$tvValue = $modx->resource->getTVValue('TvName');
$modx->setPlaceholder('TvName', $tvValue);

I think my question is not written properly: When I load the Resourve Page with my TV on it everything works fine. I do get the TV Values from the TvInputRenderer and can initialize my Javascript object with the data. Also changing and storing back to the DB works fine. However, as my custom TV does not use MODext Objects and probably does not render the needed DOM tags, when I hit the save button on the top of the resource page, the MODext that generated that page somehow tries to serialize my TV's values. And since it can't find anything there it saves NULL to the database, hence overwritting my previously stored information.
Now my question is, how do I hook into this Save Mechanism of my resource page, so my TV value does not get reset to NULL?

I followed these things and managed to get it to work just fine. However there is one last issue I can't get to: My Custom Upload TV now saves directly upon successfully adding the files. If the user now hits Save on the top of the page, my TV of course appears empty and NULL is written to the database. How do I either pass the proper data format to the request, that saves the page or how can I get ignored, so my already saved TV values are not overwritten?

can't you get the TV-Value with a plugin, that runs on the system-event OnDocFormSave and set the correct value, before modx saves it to the db?