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| In this article, we will show how to make a field mandatory based on the value of another field. |
Figure 1: When dropdown "Type" is set to "With Evidence", "Attachment" becomes mandatory field.
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Place the file upload in its own section, configure the section visibility to only show such that when the dropdown value is "With Evidence".
Figure 2: File Upload in its own section
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import java.util.Arrays;
import org.joget.apps.app.service.AppUtil;
import org.joget.apps.form.model.Element;
import org.joget.apps.form.model.Form;
import org.joget.apps.form.model.FormData;
import org.joget.apps.form.service.FormUtil;
public boolean validate(Element element, FormData formData, String[] fileUploadValues) {
boolean result = true;
//get dropdown select box value
String field1Id = "type";
Form form = FormUtil.findRootForm(element);
Element field1 = FormUtil.findElement(field1Id, form, formData);
if (field1 != null) {
//get value of field 1
String[] field1Values = FormUtil.getElementPropertyValues(field1, formData);
if(field1Values[0].equalsIgnoreCase("With Evidence") && fileUploadValues[0].isEmpty() ){
String id = FormUtil.getElementParameterName(element);
formData.addFormError(id, "Attachment is required when type is 'with evidence'");
result = false;
}
} else {
//ignore if the dropdown does not exist
}
return result;
}
//call validate method with injected variable
return validate(element, formData, values); |
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