Question

Possible Duplicate:
Python JSON serialize a Decimal object

I have the following SQL:

SELECT 
    concat(UNIX_TIMESTAMP(date), '000') as datetime, 
    SUM(royalty_price) as sales 
FROM 
    sales_raw 
GROUP BY 
    datetime

The results look something like:

datetime        sales
1337151600000   1045.71 (decimal)
1337238000000   478.04
1337324400000   300.96
1337410800000   289.02

From this I get the following error:

Exception Type: TypeError at /ajax/graph/
Exception Value: Decimal('1045.71') is not JSON serializable

How would I convert the decimal into an acceptable format in mysql to be able to serialize this data?

Answer 1

If you must do it in MySQL, just CAST to a string:

SELECT 
    CONCAT(UNIX_TIMESTAMP(date), '000') AS datetime, 
    CAST(SUM(royalty_price) AS CHAR)    AS sales
FROM 
    sales_raw 
GROUP BY 
    datetime