Query failing in Taskqueue
MS
We have a Web2py application hosted on Google app engine.
We are trying to implement Taskqueue for fetching record from tables, we are passing the filter field (date type) and number of years as parameters. These parameters will be then passed to a Query to fetch the data from the Database.
Please find the code snippet as given below:
Task_handler() function accepts the 2 input parameters and calls the taskqueue which is defined in the task_process() function. In task_process() function we are calculating the date based on the number of years parameters and using it in the query to fetch the records older than the calculated date.
def task_handler():
if len(request.args):
field= request.args[0]
filter=int(request.args[1])
return taskqueue.add(url=URL('task_process'),params={’field’:field,'diff': filter,},method="POST")
def task_process():
field= request.form.get(‘field’)
diff = request.form.get('diff')
filter_date = datetime.date.today() + datetime.timedelta(-(365*(diff)))
result = []
result = db(field < filter_date).select()
Note :
field in this case is db.<tablename>.<columnname>
If we directly use the input parameter in query, it fails due to datatype mismatch.
So we tried by hard-coding the table field name in the query but got Attribute Error for that.
Kindly provide your inputs on what are we missing here or doing wrong.
Thanks.
Dave S
Perhaps you could show how you define "field" in your model. Does "field" have datetime attributes? It looks to me like your select expects it to.
/dps