[sql gen] Properly create UNIQUE index on non string column. Closes #13728492
Unique was previously detected in a loop triggered only for String columns.
<html>
<head>
<!-- dependencies -->
<script type="text/javascript">
var JSON_BASE_URL = '';
</script>
<script type="text/javascript" src="/data/jquery.js"></script>
<script src="/data/cubicweb.js" type="text/javascript"></script>
<script src="/data/cubicweb.htmlhelpers.js" type="text/javascript"></script>
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<script src="/data/cubicweb.compat.js" type="text/javascript"></script>
<script src="/data/cubicweb.ajax.js" type="text/javascript"></script>
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<script src="test_ajax.js" type="text/javascript"></script>
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<h1 id="qunit-header">cubicweb.ajax.js functions tests</h1>
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<ol id="qunit-tests">
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