问题
who can help, I have made an add-on to the apex oracle. The essence of it is that I can choose there to indicate whether the obligation to upload a photo in the form. For example, if the mandatory photo field is set to Yes in the setup tally (this section I assigned P_mandatory_photo), the photo uploaded to the P_Photo change should be necessarily loaded because the "Create" button will be hidden, but if in the setup tile the field "mandatory photo" equals "No", if I haven't even uploaded a photo, the "Create" button will not be hidden. Can help me ??
P_mandatory_photo =
select val from setting where name = 'mandatory_photo'来源：https://stackoverflow.com/questions/58202158/hide-the-create-button-if-p-photo-is-null-and-p-mandatory-photo-yes