Thanks so much! that worked great. It seems like google directed me everywhere except to the recipes.
On Fri, Aug 17, 2012 at 4:32 AM, GHZ <geraint.willi...@gmail.com> wrote: > There is a recipe for dropping FK constraints: > > http://www.sqlalchemy.org/trac/wiki/UsageRecipes > > did you find that? > > In addition, if you wanted to keep the FKs enabled, there is an example here > using Metadata.sorted_tables, to get the table list in dependency order. > > http://docs.sqlalchemy.org/en/rel_0_7/core/schema.html?highlight=sorted_tables#reflecting-all-tables-at-once > > > On Friday, August 17, 2012 4:48:10 AM UTC+2, Greg wrote: >> >> Hi, >> >> I was naively trying to clear a db earlier in the day and I ran into this >> problem: 'Cannot delete or update a parent row: a foreign key constraint >> fails' >> >> So as anyone would do I've been searching online and through the >> documentation on how to turn the foreign keys off, on delete = Cascade, >> delete orphan-cascade what have you. So many hours and many stack traces >> later I'd like to ask your help in this matter >> >>> def cleanMapping(self, dbName): >>> >>> connection = self.dbEngines[dbName].connect() >>> trans = connection.begin() >>> >>> for my_table in reversed(self.dbMetaData[dbName].tables.values()): >>> keys= my_table.foreign_keys >>> for column in my_table.columns: >>> for key in keys: >>> >>> my_table = Table(my_table, self.dbMetaData[dbName], >>> Column(column, Integer, >>> ForeignKey(key, onupdate="CASCADE", ondelete = >>> "CASCADE") >>> ,primary_key=True)) >>> connection.execute(my_table.delete()) >>> >>> trans.commit() >> >> >> So I'm fresh out of ideas; Everytime I try using this code I get >> "sqlalchemy.exc.ArgumentError: Column object already assigned to Table >> <col>" >> >> > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/sqlalchemy/-/6EiRPIEPIHAJ. > > To post to this group, send email to sqlalchemy@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. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@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.
