Ah, getattr()… I forgot that one! It's a bit messy, but my tables now fill correctly: recordData = getattr(record, table.columns.keys()[i].__str__()).__str__()
Maybe one day I'll make my table schemas (is that the right term for them?) itterable, but this works for now. Thanks for the help. I assumed subclasses of base would be iterable so one could iterate over individual rows, but now I know they aren't, it'll be easy enough to add that in the future as I get more complex tables. > On Feb 4, 2016, at 18:51, Simon King <si...@simonking.org.uk> wrote: > > >> On 4 Feb 2016, at 18:19, Alex Hall <ah...@autodist.com> wrote: >> >> Hello all, >> I'm setting my application up the way Simon suggested. I still use the >> table object so I can get its name for displaying in one list, but the >> other list (which holds the actual rows of the selected table) is >> using the relevant subclass of base. >> >> I use wx.ListCtrl to display everything, and when I load the rows into >> their list, I first grab the column names from the table and set the >> list to have those columns. Then, I want to itterate over each row, >> extracting the value for the given column and displaying it. That's >> the problem: these objects are not itterable. I tried to use >> value(columnName), but that didn't work, even though the rows are >> returned from a query. Here's my attempt thus far. >> >> def updateSelectedIndex(self, evt): >> """When the index changes in the list of tables, the list of records >> is automatically populated with the newly-selected table's records.""" >> super(DBTablesListManager, self).updateSelectedIndex(evt) >> self.records_listControl.ClearAll() #to avoid appending items--we >> want each table to display only its own data >> table = self.choices[self.selectedIndex][0] #this is the >> sql.schema.Table object >> self.records = >> DBInterface.session.query(self.schemas[self.selectedIndex]).all() >> #self.schema is the list of actual subclasses of base, not table >> objects >> #set the column names in the records list >> i = 0 >> for column in table.columns: >> self.records_listControl.InsertColumn(i, column.name) >> i += 1 >> #add the data >> i = 0 >> for record in self.records: >> recordData = record.value(table.columns[i]).__str__() #this line errors >> self.records_listControl.InsertStringItem(i, recordData) >> for j in range(1, len(record)): >> self.records_listControl.SetStringItem(i, j, record[j].__str__()) >> #this line would fail too >> i += 1 >> >> I'm either missing something obvious, or thinking about this all >> wrong, because itterating over a row has to be a pretty common need. >> Thanks in advance for any suggestions anyone has. > > “record” is an instance of your mapped class. It doesn’t have any public > methods other than those which you define yourself (so for instance it > doesn’t have a “value()” method or an __iter__ method unless you define > them). If you want to get a named attribute from it, use the standard python > getattr function: > > recordData = getattr(record, colname) > > Hope that helps, > > Simon > > -- > 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 https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- Alex Hall Automatic Distributors, IT Department 942-6769, Ext. 629 ah...@autodist.com -- 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 https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
