Re: [sqlalchemy] python customer function
thanks for point me to this docs, Jonathan, I'm going to take a look at it. j On 08/05/2015 23:30, Jonathan Vanasco wrote: Would you be able to use a TypeDecorator? http://docs.sqlalchemy.org/en/latest/core/custom_types.html#sqlalchemy.types.TypeDecorator That will allow you to define a function for handling how sqlalchemy inserts and accesses the data from sql. -- 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 mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- 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/d/optout.
Re: [sqlalchemy] python customer function
Hi Mike, thanks to reply my question. In my case the extract function is unuseful because it needs a datetime to extract parts of it but I don't have a datetime but a codified date. I need to manage a string which is a personal code with info about name, birthday, birth place and gender. Infact the birth month is represented by a single letter (not in sequential order) A=jan B=feb C=mar D=apr E=may F= - G= - H=jun I= - J= - K= - L=jul M=aug N= - O= - P=sep Q= - R=oct S=nov T=dec the day contains also the gender, (female is incremented of 40) the birth year has only 2 digits. Examples: 60R11 = 1960-10-11 male 60R51 = 1960-10-11 female 00T41 = 1900-12-01 female 00T01 = 1900-12-01 male I'm looking for a function to decode such string. I thought I could create a python function to manage it. j On 07/05/2015 22:01, Mike Bayer wrote: On 5/7/15 9:10 AM, jo wrote: Hi all, I would like to create a python customer function to extract data from a table column and return a calculated value as in: def birth(data): mm = dict(A='01',B='02',C='03',D='04',E='05',H='06',L='07',M='08',P='09',R='10',S='11',T='12') return '19'+data[6:8] +'-'+ mm[data[8:9]] +'-'+ data[9:11] sa.func.to_date( birth(Anagrafica.c.dato_fiscale), '-mm-dd')) in: Anagrafica.c.dato_fiscale='ZZZHHH54M11Z128Y' out: '1954-08-11' How can I do this in a sqlalchemy query? look into using the extract() function: http://docs.sqlalchemy.org/en/rel_1_0/core/sqlelement.html?highlight=extract#sqlalchemy.sql.expression.extract it mostly works the same on all backends, here's PG's docs: http://www.postgresql.org/docs/8.1/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT thanks for any help. j -- 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 mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- 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 mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- 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/d/optout.
Re: [sqlalchemy] python customer function
Would you be able to use a TypeDecorator? http://docs.sqlalchemy.org/en/latest/core/custom_types.html#sqlalchemy.types.TypeDecorator That will allow you to define a function for handling how sqlalchemy inserts and accesses the data from sql. -- 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/d/optout.
Re: [sqlalchemy] python customer function
On 5/7/15 9:10 AM, jo wrote: Hi all, I would like to create a python customer function to extract data from a table column and return a calculated value as in: def birth(data): mm = dict(A='01',B='02',C='03',D='04',E='05',H='06',L='07',M='08',P='09',R='10',S='11',T='12') return '19'+data[6:8] +'-'+ mm[data[8:9]] +'-'+ data[9:11] sa.func.to_date( birth(Anagrafica.c.dato_fiscale), '-mm-dd')) in: Anagrafica.c.dato_fiscale='ZZZHHH54M11Z128Y' out: '1954-08-11' How can I do this in a sqlalchemy query? look into using the extract() function: http://docs.sqlalchemy.org/en/rel_1_0/core/sqlelement.html?highlight=extract#sqlalchemy.sql.expression.extract it mostly works the same on all backends, here's PG's docs: http://www.postgresql.org/docs/8.1/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT thanks for any help. j -- 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 mailto:sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com mailto:sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout. -- 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/d/optout.
