Question

How can I show errors from two beans (second one being a command object) in one list?

I can do this:

<g:hasErrors beans="${bookInstance}">
<g:renderErrors bean="${bookInstance}" as="list" />
</g:hasErrors>
<g:hasErrors beans="${myCmdObject}">
<g:renderErrors bean="${myCmdObject}" as="list" />
</g:hasErrors>

but it gives me two lists. I want to do something like this:

<g:hasErrors beans="${bookInstance, myCmdObject}">
<g:renderErrors bean="${bookInstance, myCmdObject}" as="list" />
</g:hasErrors>

which will give me one list. Is there a nice way of doing this?

Answer 1

Yes. You can use the model attribute described here. It takes in a map and will render the errors of all the entries in that map. The same is true for hasErrors.

Try:

<g:hasErrors beans="[bookInstance:bookInstance, myCmdObject:myCmdObject]">
    <g:renderErrors beans="[bookInstance:bookInstance, myCmdObject:myCmdObject]" as="list" />
</g:hasErrors>