Whats the mean the table blogpost_tag already that blogpost have a list
reference to tag.
Em segunda-feira, 13 de março de 2017 10:08:32 UTC-3, Leonel Câmara
escreveu:
>
> I actually like to have a list:reference on the table being tagged but
> also have a table relating tags and the tagged table, This doesn't respect
> data normalisation but makes things quite more efficient.
>
> To give an example:
> db.define_table('tag',
> Field('name'),
> Field('count', 'integer', writable=False, default=0),
> )
>
> db.define_table('blogpost',
> Field('title'),
> Field('body'),
> Field('tags', 'list:reference tag')
> )
>
>
> db.define_table('blogpost_tag',
> Field('blogpost', 'reference blogpost'),
> Field('tag', 'reference tag'),
> )
>
>
> I then define _after_insert, _after_update and _before_delete functions
> for blogpost so I keep the blogpost_tag table updated when a blogpost is
> changed or inserted.
>
> This makes it very efficient to both search using a given tag and to know
> which tags a blogpost has.
>
>
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