On Fri, 4 Oct 2013 23:58:38 +0300 "Ofir Herzas" <herz...@gmail.com> wrote:
> Enrico, It should be available on 0.7.10 > > Simon, you are right. The expression is indeed a must. > > class Plan(Base): > @hybrid_property > def calculated_date(self): > return date(self.year, self.month, self.day) > > @calculated_date.expression > def calculated_date(self): > return sa.cast(self.year + '-' + self.month + '-' + self.day, > sa.Date) > > Thanks to all. At the end I solve adding a date column in the db and write the code to fill the new column. Thanks again. > -----Original Message----- > From: sqlalchemy@googlegroups.com > [mailto:sqlalchemy@googlegroups.com] On Behalf Of Simon King > Sent: Friday, October 04, 2013 7:01 PM > To: sqlalchemy@googlegroups.com > Subject: Re: [sqlalchemy] Query for date between a range > > I'm not sure that will work on it's own, will it? When used in a class > context (Plan.calculated_date), you will end up calling the date > function with 3 SQLAlchemy column objects, which won't work. > > At a minimum, you'd need this: > > class Plan(Base): > @hybrid_property > def calculated_date(self): > return date(self.year, self.month, self.day) > > @calculated_date.expression > def calculated_date(cls): > # I suspect that what you put in here depends on the database > return sa.cast(cls.year + '-' + cls.month + '-' + cls.day, > sa.Date) > > On Fri, Oct 4, 2013 at 2:25 PM, Ofir Herzas <herz...@gmail.com> wrote: > > I'm sorry, you should use hybrid_property: > > > > from sqlalchemy.ext.hybrid import hybrid_property > > > > class Plan(Base): > > @hybrid_property > > def calculated_date(self): > > return date(self.year, self.month, self.day) > > > > > > Also, in your query, don't use between: > > session.query(Plan).\ > > filter(Plan.calculated_date >= from_date).\ > > filter(Plan.calculated_date <= to_date)) > > > > Cheers, > > Ofir > > > > -----Original Message----- > > From: sqlalchemy@googlegroups.com > > [mailto:sqlalchemy@googlegroups.com] On Behalf Of Enrico Morelli > > Sent: Friday, October 04, 2013 4:05 PM > > To: sqlalchemy@googlegroups.com > > Subject: Re: [sqlalchemy] Query for date between a range > > > > On Fri, 4 Oct 2013 15:55:07 +0300 > > "Ofir Herzas" <herz...@gmail.com> wrote: > > > >> You can create a custom field in your model and check against it: > >> > >> class Plan(Base): > >> . > >> . > >> . > >> @property > >> def calculated_date(self): > >> return date(self.year, self.month, self.day) > >> > >> > >> Then, in your query, use that field: > >> session.query(Plan).filter(Plan.calculated_date.between(from_date, > >> to_date)) > >> > >> Haven't checked it myself, but I guess it should work ... > > > > Thanks, but now I receive the error: > > > > AttributeError: 'property' object has no attribute 'between' > > > >> > >> -----Original Message----- > >> From: sqlalchemy@googlegroups.com > >> [mailto:sqlalchemy@googlegroups.com] On Behalf Of Enrico Morelli > >> Sent: Friday, October 04, 2013 12:07 PM > >> To: sqlalchemy@googlegroups.com > >> Subject: [sqlalchemy] Query for date between a range > >> > >> Dear all, > >> > >> I've a table where the date is separated in single fields, one for > >> year, one for day and one for month. So I need to query for a date > >> range. I search in Internet and I found the following query that > >> seems to be works: SELECT * FROM plan WHERE year * 10000 + month * > >> 100 + day BETWEEN +'20130101' AND '20130131'; > >> > >> Now I'm trying to translate to sqlalchemy, but I receive the > >> following > >> error: > >> > >> DataError: (DataError) invalid input syntax for integer: > >> "2013-01-01T00:00:00" LINE 3: ...year * 1000 + plan.month * 100 + > >> plan.day BETWEEN '2013-01-0... ^ 'SELECT plan.data AS plan_data, > >> plan.month AS plan_month, plan.instrument_id AS plan_instrument_id, > >> count(plan.instrument_id) AS count_1 \nFROM plan \nWHERE plan.year > >> * %(year_1)s + plan.month * %(month_1)s + plan.day BETWEEN > >> %(param_1)s AND %(param_2)s AND plan.data ILIKE %(data_1)s GROUP > >> BY plan.data, plan.month, plan.instrument_id ORDER BY month, > >> instrument_id' {'data_1': u'%#L%', 'param_1': > >> datetime.datetime(2013, 1, 1, 0, 0), 'month_1': 100, 'year_1': > >> 1000, 'param_2': datetime.datetime(2013, 10, 3, 0, 0)} > >> > >> > >> The latest attempt to write the correct code is the following (the > >> range come from a web form using a javascript plugin): > >> > >> from_date = request.POST.get('from_date', '') to_date = > >> request.POST.get('to_date', '') from_date = > >> datetime.strptime(from_date, '%Y-%m-%d') to_date = > >> datetime.strptime(to_date, '%Y-%m-%d') if from_date.day < 10: > >> day = "0%s" % from_date.day > >> else: > >> day = "%s" % from_date.day > >> if from_date.month < 10: > >> month = "0%s" % from_date.month > >> else: > >> month = "%s" % from_date.month > >> if to_date.day < 10: > >> tday = "0%s" % to_date.day > >> else: > >> tday = "%s" % to_date.day > >> if to_date.month < 10: > >> tmonth = "0%s" % to_date.month > >> else: > >> tmonth = "%s" % to_date.month > >> fd = '%s%s%s' % (from_date.year, month, day) td = '%s%s%s' % > >> (to_date.year, tmonth, tday) print fd, td results = > >> Session.query(Plan.data, > >> Plan.month,Plan.instrument_id,func.count(Plan.instrument_id)).filter( > >> and_((Plan.year*1000+Plan.month*100+Plan.day).between(from_date, > >> to_date), Plan.data.ilike('%%%s%%' % item),)).group_by( > >> Plan.data, Plan.month, > >> Plan.instrument_id ).order_by('month', 'instrument_id').all() > >> > >> Where I'm wrong? > >> > >> Thanks to all > >> -- > >> ------------------------------------------------------------- > >> Enrico Morelli > >> System Administrator | Programmer | Web Developer > >> > >> CERM - Polo Scientifico > >> Via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY > >> phone: +39 055 457 4269 > >> fax: +39 055 457 4253 > >> ------------------------------------------------------------- > >> > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "sqlalchemy" group. > >> To unsubscribe from this group and stop receiving emails from it, > >> send an email to sqlalchemy+unsubscr...@googlegroups.com. > >> To post to this group, send email to sqlalchemy@googlegroups.com. > >> Visit this group at http://groups.google.com/group/sqlalchemy. > >> For more options, visit https://groups.google.com/groups/opt_out. > >> > > > > > > -- > > ------------------------------------------------------------- > > Enrico Morelli > > System Administrator | Programmer | Web Developer > > > > CERM - Polo Scientifico > > Via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY > > phone: +39 055 457 4269 > > fax: +39 055 457 4253 > > ------------------------------------------------------------- > > > > -- > > You received this message because you are subscribed to the Google > > Groups "sqlalchemy" group. > > To unsubscribe from this group and stop receiving emails from it, > > send an email to sqlalchemy+unsubscr...@googlegroups.com. > > To post to this group, send email to sqlalchemy@googlegroups.com. > > Visit this group at http://groups.google.com/group/sqlalchemy. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > > You received this message because you are subscribed to the Google > > Groups > "sqlalchemy" group. > > To unsubscribe from this group and stop receiving emails from it, > > send an > email to sqlalchemy+unsubscr...@googlegroups.com. > > To post to this group, send email to sqlalchemy@googlegroups.com. > > Visit this group at http://groups.google.com/group/sqlalchemy. > > For more options, visit https://groups.google.com/groups/opt_out. > > -- > You received this message because you are subscribed to the Google > Groups "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, > send an email to sqlalchemy+unsubscr...@googlegroups.com. > To post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/groups/opt_out. > -- ------------------------------------------------------------- Enrico Morelli System Administrator | Programmer | Web Developer CERM - Polo Scientifico Via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY phone: +39 055 457 4269 fax: +39 055 457 4253 ------------------------------------------------------------- -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
