g:select value disappears after populating the select

Question

Im using g:select to that is populated with a list from controller! i pass the selected value as well from the controller when the select changed and submitted !

 <g:select id="select"
           name="select"
           from="${someList}"
           value="${passedParameter_selectedValue}"
           noSelection="${['':'sth']}"
           optionValue='name'
           optionKey="id"
           />

When i debugged it so after submitting the values , my page is refreshed with a list from the controller! so the select has ( Value ) after one iteration then it becomes null !

The thing is it was working good when i didn't use optionKey!

Answer 1

value should be same as optionKey e.g. your optionKey is an id and therefore value should also be an id of the instance. Try

value="${passedParameter?.id}"