There is a piece here that is dense, has caused some confusion and deserves a comment:
On Sun, Apr 26, 2009 at 1:32 PM, DolleDries <[email protected]>wrote: > > Given the model for web2py-wiki: > > > db.define_table('tag', > db.Field('name')) > > db.tag.name.requires=IS_NOT_EMPTY() > > db.define_table('page', > db.Field('uuid',length=128,writable=False,default=str(uuid.uuid4 > ())), > db.Field('title'), > db.Field('menu',length=128), > db.Field('public','boolean',default=False), > db.Field('active','boolean',default=True), > db.Field('body','text'), > *#* db.Field('tags','text'), * # yarko prefers more "explicit" naming: db.Field("tag_ids, 'text'), # note: id's == multiple references; # it's defined as text but holds a string of foreign keys, '|12|14|22|' # this _could_ be done as a one-to-many table entry, eg: keys: field - page; field - tag # but this '|1|2|3|' is web2py implementation, an efficiency for when this won't hold too many # not sure what the trade off point is (Massimo could comment) # ... perhaps a 1000 keys would do better with a separate table??? * > > db.Field('created_by',db.auth_user,default=who,writ#able=False), > db.Field('created_on','datetime',default=now,writable=False)) > > db.page.title.requires=IS_NOT_EMPTY() > db.page.tags.requires=IS_IN_DB(db,'tag.id','%(name)s',multiple=True) > > > Can somebody explain to to me what is meant by the last line??? > > It seems to me this line has a diffenrent meaning: db.Field > ('tags','text'). > I believe it should be somthing like: db.Field('tags', db.tag) or > perhaps a SET or ENUM of tags... > > Put how is that produced dynamicly? Haven't found anything in the book > or API yet.. > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
