How to load data into a dropbox

I need to fill the dropbox options with data from a table.
I read data from the table using a Read Data block, read_pai. The model name is dtpai. Retrieve org_id and org_name.

But what should I put in the checkbox options to use this data?

The form loaded the data, but does not show it in the dropbox.
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I tried:
{var:read_pai.dtpai.org_id}={var:read_pai.dtpai.org_nome}
{var:read_pai.dtpai}
{var:read_pai}
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Thanks all.

Did you set return type to "an array of key/value pairs" ?

Oohh. No, I didn't.

Thanks, now is working fine.

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Once more, thanks

Hi, it's me again.
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One more thing.
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I have a list of departments, to fill with the senior departament.
Like this:
1= Departament XX
2= Departament VVV
3= Departament ZZZ
]
But I need to insert a line to define the TOPs departments. Like this:
0=Top department
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How I can do that?

Exactly like that

Simple.

Yes, just like that.

Thanks again.