I am using the same orderby whether using limitby or not, as I stated. Thus, using orderby alone, I should get the same first 20 records in the same order as I would get by using limitby(0,20); I am not (again, as shown) In fact, I get the same sequence using limitby(0,20) as appears on the first page of the SQLFORM.grid when sorted on the appropriate column.
On Monday, December 12, 2016 at 1:42:57 PM UTC-5, Richard wrote: > > Hello Scott, > > I am not sure I understand the problem... But for sure limit by alone will > never return you the same set of results as you didn't specify the order in > which you want the result to be and the analyser just favor the faster > quering path... So don't expect limitby alone to return the same set of > data each time you query the database, if it happen to be the same set it > just matter of chance. By using orederby you should see your problem go > away except if you really had found an issue that would be implementation > specific as you seems to point us in that direction. You can orderby over > table id if you have not special requirement on that matter. > > Richard > > On Sun, Dec 11, 2016 at 11:49 PM, Scott Hunter <shu...@nycap.rr.com > <javascript:>> wrote: > >> I'm using a SQLFORM.grid, using a query of the form: >> >> db.t_dog.id.belongs(dog_ids) >> >> >> >> But the listing is erratic; some records only appear when the list is >> sorted certain ways (except for the last page); entries on each page are in >> order, but entries between pages overlap. >> >> I thought the problem might be how grid uses limit by to get the records >> for a given pages, and sure enough, if I do the query myself, the query >> results match what appears on each page. >> >> For example, when sorting by code #, the start of the whole result looks >> like: >> >> 99 Test Collie 2 >>> 1350 Tovah Border Collie 2 >>> 1582 Lexi Border Collie 2 >>> >>> *1702 Bean Border Collie 2* >>> >>> >>> * 1704 Ginger Border Collie 2 3865 Owen Border Collie 2 4099 >>> Flirt Border Collie 2** 5169 Super G Border Collie 2* >>> 5199 Emme Border Collie 2 >>> 5202 Beamer Border Collie 2 >>> * 5203 Audie Border Collie 2* >> >> >> But using limitby(0,20), I get: >> >> 1702 Bean Border Collie 2 >>> 1704 Ginger Border Collie 2 >>> 3865 Owen Border Collie 2 >>> 4099 Flirt Border Collie 2 >>> 5169 Super G Border Collie 2 >>> 5203 Audie Border Collie 2 >> >> >> This is on OS X using sqlite; it seems to be fine using sqlite on Linux. >> >> -- >> Resources: >> - http://web2py.com >> - http://web2py.com/book (Documentation) >> - http://github.com/web2py/web2py (Source code) >> - https://code.google.com/p/web2py/issues/list (Report Issues) >> --- >> You received this message because you are subscribed to the Google Groups >> "web2py-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to web2py+un...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
