On Sun, 2009-03-15 at 04:25 -0700, Kegan wrote: > I am dealing with formset, and finding the lack of documentation in > understanding it. Hope anyone experienced with formset could help.
At some point just opening up the relevant source file is always a good solution. It's only Python code and not particularly difficult to understand. Or experiment. Create a formset and vary the parameters you are interested in and see how it affects the displayed form. > > What is the reason to have a "max_num" and "extra" argument when > instantiating a form set (using formset_factory)? Can't you just use > "max_num" to determine the number of forms in the form set? The max_num parameter is the number of forms that are populated with initial data to display. It means you can pass in, say, a queryset (for modelformsets) without having to make sure it only contains the right number of records. If there are more records in the queryset than max_num, the first records are used and the latter ones discarded. The "extra" parameter is the number of blank forms to display (extra forms with no data populated). > > Also, management_form render "form-TOTAL_FORM", and 'form- > INITIAL_FORMS', ... how is this correspond to "max_num" or "extra", or > they don't? The total form count is the total number of forms and the initial form count is the number of "initial" forms -- forms populated with initial data -- in the form set. Those values' upper-bounds can be computed from max_num and extra (since initial forms won't be greater than max_num) and, thus, total forms won't be greater than max_num + extra. But they are only upper bounds. Regards, Malcolm --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
