that didnt do it.
And i would like to doit with one query if possible.
my db looks like this:
db.define_table('images',
SQLField('posted_on','datetime', default=request.now,
writable=False, readable=False),
SQLField('posted_by', db.auth_user, writable=False,
readable=False),
SQLField('public', 'string', requires=IS_IN_SET({'no': T('No'),
'yes': T('Yes')}), default="no"),
SQLField('sha256', 'string', writable=False, readable=False),
SQLField('org_filename','string', writable=False,
readable=False),
SQLField('image','upload'))
db.define_table('keyword',
SQLField('keyword', length=40))
db.define_table('image_info',
SQLField('image_id', db.images),
SQLField('Caption'),
SQLField('Description','text'),
SQLField('Creator','string'),
SQLField('Copyright_Notice','string'),
)
db.define_table('image_keyword',
SQLField('image_id', db.images),
SQLField('keyword_id', db.keyword));
On Jun 25, 4:04 pm, johann.scheibelho...@easytouch-edv.com wrote:
> Maybe I'm wrong but I think Robert needs a left join. something like...
>
> result = db(db.images.id==db.image_info.image_id).select(\
> left=[db.keyword.on(db.keyword.id==db.image_keyword.keyword_id)])
>
> web2py@googlegroups.com schrieb am 25.06.2009 15:19:50:
>
>
>
> > On Jun 25, 1:51 pm, Robert Marklund <robbelibob...@gmail.com> wrote:
> > > I would like to do a join but get results even if it was unsucessfull.
> > > Like this
> > > query = (db.images.id == db.image_info.image_id) &
> > > (db.images.id==db.image_keyword.image_id)
> > > & \
> > > (db.keyword.id==db.image_keyword.keyword_id)
> > > I want to get the resulting rows even doe no keywords exists.
> > > like this row.image = the image
> > > row.image_info = the image info
> > > row.keyword = None if there is no keyword.
> > > Is this possible ?
>
> > Surely you just do 2 queries.
> > 1st do the JOIN:
> > query = (db.images.id == db.image_info.image_id) &
> > (db.images.id==db.image_keyword.image_id)
>
> > Then add keywords via lookups:
> > sqlrows = db(query).select()
> > for row in sqlrows:
> > query2 = (db.image_keyword.image_id==row.id) &
> > (db.keyword.id==db.image_keyword.keyword_id)
> > row.keyword = db(query2).select()[0]
>
> > (Untested code)
>
> > F
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