aws iot list-things, filtering by attribute-name and attribute-value

Question

Hello,  
I am trying to find an iot Thing in my registry before doing some other logic.  
All the things have an attribute "Serial", so I tried this command:

```
aws iot list-things --attribute-name "Serial" --attribute-value "1234"
```

And it doesn't find anything:

```
{
    "things": []
}
```

If I try it without any filters:

```
aws iot list-things
```

I see the Thing with the attributes, including Serial = 1234

```
{
    "things": [
        {
            "thingName": "test123",
            "thingTypeName": "Tablet",
            "thingArn": "arn:aws:iot:us-west-2:***********:thing/test123",
            "attributes": {
                "Serial": "1234"
            },
            "version": 1
        }
    ]
}
```

I even tried
 `aws iot list-things --attribute-name "Serial"`
 and still nothing comes back.  
  
What am I missing?

Answer

Hi omora,  
  
I see your thing has an associated thing type named Tablet. Is the Serial attribute defined by the Tablet thing type? The only searchable/filterable attributes in the ListThings API are those defined by your thing type (or the 3 attributes you get by default when no thing type is associated).  
  
Ryan

aws iot list-things, filtering by attribute-name and attribute-value

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