Let a field automatically look up a table

[askche]

Hi,

On a update form, is there a way to let a field automatically look up a table and return a value based on the inputs on two other fields?

Ultimately, I want to insert the looked up value into the name of another field to ask another question.

Thank you in advance for your help!

[casyana]

Could you, please, elaborate? It sounds like a cascading form element, isn't it what do you need?

http://howto.caspio.com/datapages/form- ... boxes.html

[askche]

The cascading table can only look up values from one field, but I will need the field to look up a value from a table based on two fields.

[casyana]

In this case you need a JS to implement it. You may have two cascading hidden virtual dropdowns and you may populate another virtual dropdown with values which are present in both cascading dropdowns. With help of JS you can find which dd has less options and go through each each option in a loop and check (in another loop) if the same option is present in the second dropdown. And if yes, you need to add this option to your virtual dropdown. And on submit you may save this virtual dropdown value to the real field, which has to be hidden on the form.