dayrain missing from archive table?

[RangerRick]

I have your code plus weewx 3.7.1 installed and everything appears to be working except I appear to not have a dayrain column so error.log is throwing this:

2017/05/26 09:57:11 [error] 26806#0: *219 [lua] api.lua:46: view(): Failed SQL query:        SELECT
            datetime,
			date_trunc('second', age(NOW(), date_trunc('second', datetime))) AS age,
            dayrain        FROM archive        WHERE
        dayrain =
        (
            SELECT
                MIN(dayrain)
            FROM archive            WHERE         (
            datetime BETWEEN CURRENT_DATE            AND
            CURRENT_DATE + INTERVAL '1 DAY'
        )
                    LIMIT 1
        )
        AND         (
            datetime BETWEEN CURRENT_DATE            AND
            CURRENT_DATE + INTERVAL '1 DAY'
        )
                LIMIT 1
        , client: 192.168.211.236, server: localhost, request: "GET /api/record/dayrain/min?start=today HTTP/1.1", host: "weather:8080", referrer: "http://weather:8080/"

Any ideas how to go about fixing this query to work?