Select box

I am trying to show list values in select widget in bonita ui using process variable but its not working .I am using Bonita BPM Community Edition
Version : 7.3.3 Studio. Its showing values character by character not as string values.It should show values like:

some 1
some 2
but its displaying values like:
[
s
o
m
e

1
,
....
My whole process is given at link.
https://uploadfiles.io/4c1161

I want to show list of IDs and string in bonita ui select widget. I am new to bonita I have done this using process variable but i need it using bdm. can anybody provide a guide or solution. Any help will be appreciated. Thanks in advance.

I am trying to fetch values from PostgreSQL database and want to show these values in drop down /select box in Bonita ui designer. I have study many tutorial but not found complete useful information. I am new to Bonita so confused about how to show list of values in select box and pass selected value to next step. I have worked with input field and passed user input value using process variable to next step but do not how to work with dynamic select box.

Hello everyone.
I want to use select box in UI Designer which take data from variable(List of string defined in studio).
can anyone help me?
Thanks a lot.
(I use Bonita BPM Community Edition 7.1.2)