Meltano

Hi all.
`Extraction failed              code=1 message=ValueError: Could not detect type from empty type_dict. Did you forget to define a property in the stream schema?` 
Does it mean that there is a stream returning 0 rows or what exactly? There is no significant infor in the log even with debug mode. To clarify, in general it works properly, so all properties are set in the schema, however when I introduce `replication_key` then it throws me this error

<@U06CR0567KK> you may need to ensure whatever field you’re setting as the `replication_key` is present in the stream schema (and yeah, the error message could be more informative)

<@U06BX9QQ4A3>, thanks. Just figured it out as well, however. by the chance someone did it, is there any way to select replication_key from inside of the nested structure? Let's say `replication_key = property` where
        `th.Property(`
            `"monologue",` 
            `th.ObjectType(`
                `th.Property("property", th.StringType),`
                `th.Property("start_time", th.DateTimeType)`
            `),`
        `)`

&gt; is there any way to select replication_key from inside of the nested structure?
Not at the moment, but there are workarounds. See <https://github.com/meltano/sdk/issues/1198>. Also, feel free to give issue a :+1: and/or comment if the workaround is not useful for your use case.

I'll check that for sure and let you know, thanks! :slightly_smiling_face:

Hey <@U06BX9QQ4A3>, the workaround works like a charm (almost :smile: ) but I would make the example more clear by putting all the fields from PropertiesList in the workaround as well, not only `updated` field alone. In my case I have a list of dictionaries so had to do sth like this:
 `row["updated"] = max([s["updated"] for s in row["attributes"]])`