Not sure what the etiquette is re cross-posting to this list from stackoverflow? here's my question:
http://stackoverflow.com/questions/3044518/how-do-i-take-advantage-of-sqlite-manifest-typing-type-affinity-using-sqlalchem I like the idea of sqlite's manifest typing / type affinity: http://www.sqlite.org/datatype3.html Essentially, if I set a column's affinity as 'numeric', it will duck type integers or floats to store them as such, but still allow me to store strings if I want to. Seems to me this is the best 'default' type for a column when i'm not sure ahead of time of what data i want to store in it. so off i go: metadata = MetaData() new_table = Table(table_name, metadata ) for col_name in column_headings: new_table.append_column(Column(col_name, sqlite.NUMERIC, #this should duck-type numbers but can handle strings as well primary_key=col_name in primary_key_columns)) new_table.create(self.engine, checkfirst=False) but when i try and store some string values, eg "abc" in the table, sqlalchemy falls over: File "[...]\sqlalchemy\processors.py", line 79, in to_float return float(value) ValueError: invalid literal for float(): abc Boo, hiss. So, is there any way I can convince sqlalchemy to let sqlite do the typing? perhaps i can use a type from sqlalchemy.types instead of sqlachemy.dialects.sqlite? since the so post, i've done a little more digging. Am I going to have to write my own custom type as per http://www.sqlalchemy.org/docs/reference/sqlalchemy/types.html#custom-types? hp -- ------------------------------ Harry J.W. Percival ------------------------------ Italy Mobile: +39 389 095 8959 UK Mobile: +44 (0) 78877 02511 (may be turned off) Skype: harry.percival Email: harry.perci...@gmail.com -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
