Hello, how do I manually through javascript update a fields value so constraints are properly triggered?
I am currently using jQuery("#field_x_y").val("value");
My constraint is:
Show if Imagefile_path is not undefined
Where Imagefile_path is the hidden element (field_x_y) being set by the javascript and its default value is undefined
Richard Vav
Administrator
So the Gravity Forms conditional logic works by applying an onChange event to the input but when you use JavaScript to set the value of that input the onChange event isn't triggered but the good news is that you can trigger it by using the jQuery .change() method without any arguments like so
jQuery("#input_23_4").val("10").change();
Richard Vav
Administrator
Can you post your full script or a link to see this live. Forgetting triggering the conditional logic for a moment, does your script successfully set the value on the input?
It can be viewed at http://www.thislooksgreat.com/
After you have uploaded an image the code is run at ~line 368 inline script.
I've removed the trigger() code tho as it appeared to do nothing. If you press F5 after uploading an image the field that is supposed to be shown is visible. So the conditional logic works on a refresh.
Richard Vav
Administrator
It's because you are using a hidden field which doesn't get an onChange event added to it, try this instead
.trigger(gf_apply_rules(2, [6,16,17,18,19,20], true));the numbers inside the square brackets are the fields you have set the conditional logic on, I just copied them all but you can reduce it down to just the field or fields you want the conditional logic triggered on
It appears to work. The field gets shown. I only now have to solve an error I get from calling the function inside trigger
"Uncaught TypeError: Cannot convert null to object " in jquery.min.js line 5.
Thanks for the gf_apply_rules function.
Richard Vav
Administrator
It looks like you figured this out.
Yeah, I put a try catch around it, I couldn't figure out why the function threw an undefined jquery event which crashes the application. So it's not really solved, but fixed enough :)
It threw 3 events in this order:
gform_post_conditional_logic,
change
undefined (crashes jquery)