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How do I return the ID names

In the Teste

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Well does the table Teste have a corresponding entry? Because it looks like it doesn't. What exactly are you trying to do here, and what does your second model in the read data action look like?

I have two tables.

Tab_1 and Tab_2

Tab_1
id, name
1, car1
2, car2
3, car3

Tab_2
id, brand
1, ["1", "3"]
2, ["2"]

I want to relate these tables, and instead of showing the values of the IDs, I want to show the corresponding name

Going to need a screenshot of your read data setup.

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So is ciriosidades in your first image a JSON list of selected answers?

yes

Then you need a separate read data after the first that gets foreignkey IN {var.jsonde:read_data1.model.jsonfieldname}

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Should probably also set the first read data to first matching unless you're trying to get multiple rows

I can show it on the screen, it looks like this:

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["item1", "item2", "item3"]

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How do I display it like this:

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item1, item2, item 3 ...

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Without the brackets and quotation marks

echo implode(", ", json_decode($this->get("read_data.model.field")));

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Whack that in a PHP block or somesuch

thanks!