Thank you Villas, you've been much helpful
On Thursday, July 23, 2020 at 2:05:49 PM UTC+2, villas wrote:
>
> As you've discovered, random doesn't work in this context. Make an array
> of class attendee numbers and then allocate the class which has the fewest
> students.
>
>
> On Thursday, 23 July 2020 12:50:00 UTC+1, mostwanted wrote:
>>
>> Well the whole concept behind this application was that allocation of
>> spaces in time, days & class rooms should be automatic, the user should
>> just select the lecturer, the subject & the period the subject takes
>> (Double session=2hrs, Single session=1hr) from there after the user submits
>> that information its allocated time, day & class room automatically.
>>
>> To determine the whole automatic process I used the random() method, the
>> problem with it is that after a while of entering details some random
>> determinants start to repeat & alot more than desired causing conflict &
>> triggering (conflict handling methods) in my validation function!
>>
>> With the above code I wanted to just keep up with the whole automatic
>> notion of it!
>>
>> On Thursday, July 23, 2020 at 1:12:17 PM UTC+2, villas wrote:
>>>
>>> Suggestion:
>>> Your idea of overriding the user's selections with random choices seems
>>> strange.
>>> Why not ask the user to specify a date and then show him which classes
>>> are available nearest that date/time?
>>> He can then choose one of those.
>>>
>>>
>>> On Wednesday, 22 July 2020 19:04:27 UTC+1, mostwanted wrote:
>>>>
>>>> After a form has failed to save because that information already exists
>>>> in the database I wanna try & alter the value that determines a day where
>>>> the info is saved in the db for the form to be saved in a different day
>>>> that does not contain similar form details currently attempting to be
>>>> saved
>>>> and this should be done automatically without the engaging the user E.G:
>>>>
>>>>
>>>> def my_validator(form):
>>>> control=['1', '2', '3', '4' ,'5']
>>>> form.vars.controller = random.choice(control)
>>>> if db((db.lecture.id == form.vars.id) & (d.controller==form.vars.
>>>> controller) & (db.lecture.lecture_time == form.vars.lecture_time)).
>>>> count() >0:
>>>>
>>>> if int(form.vars.controller) < int(control[4]):
>>>> int(form.vars.controller) +1
>>>> response.flash=T('Saved in',' ', int(form.vars.controller)
>>>> +1)
>>>>
>>>> if int(form.vars.controller) > int(control[4]):
>>>> int(form.vars.controller) -1
>>>> repsonse.flash=T('Saved in',' ', int(form.vars.controller)
>>>> -1)
>>>>
>>>> else:
>>>> form.errors.lecturer=SPAN("Record already exists in the whole
>>>> database", _style="font-weight: bold;")
>>>>
>>>> The above code doesnt work but its the concept thats in my head, where
>>>> can I fix it?
>>>>
>>>>
>>>> On Tuesday, July 21, 2020 at 12:16:29 PM UTC+2, villas wrote:
>>>>>
>>>>> Your my_validator function iterates through the whole table. This is
>>>>> OK when you have a few records, but very inefficient if you have
>>>>> thousands/millions. Why not simply query the table? Something like
>>>>> this...
>>>>>
>>>>> def my_validator(form):
>>>>> if db((db.lecture.id == form.vars.id) & (db.lecture.lecture_time
>>>>> == form.vars.lecture_time)
>>>>> ).count() >0:
>>>>> form.errors.lecturer=SPAN("Record already exists",
>>>>> _style="font-weight:
>>>>> bold;")
>>>>>
>>>>>
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