Can not insert documents with function of time

[EastAnt]

I'd like to insert documents like:
{"crash_no":123,"msg":"test for time","time":datetime.datetime.now()}
But it seemed that datetime.datetime.now() function will serialize fail as json.loads not supported.How can I insert documents with time in ISOdate format?

BTW, I find out there is no aggregate function?Will this function be developed some time?That will be great! ^_^

[jerry57]

Can you please make up a sample testsuite that has this problem and I will try to look into it. I would also suggest posting to the Robotframework users group to see if anyone there can help out.

[EastAnt]

Almost like below:
${dict}={"crash_no":123,"msg":"test for time","time":datetime.datetime.now()}
[Arguments] ${dict}
Save MongoDB Records ${dict}

This will always got the error: raise ValueError("No JSON object could be decoded")

[rdagum]

I get the same error (ValueError: No JSON object could be decoded) with a similar scenario:

Insert DateTime
  ${scn1} =    catenate
  ...  {
  ...     "createdAt" : ISODate("2017-08-30T20:39:46.036Z"),
  ...     "createdBy" : "Clark Kent",
  ...     "name" : "This is a name"
  ...  }
  Save MongoDB Records    ${MDB_DBNAME}    ${MDB_COLLECTION_ADMINBOOKS}    ${scn1}

Is there a workaround to insert DateTime fields?