...so these tables:
db.define_table( 'A',
Field( 'A_id', db.A),
Field( 'B_id', db.B),
Field( 'C_id', db.C))
db.define_table( 'B',
Field( 'A_id', db.A),
Field( 'B_id', db.B),
Field( 'C_id', db.C))
db.define_table( 'C',
Field( 'A_id', db.A),
Field( 'B_id', db.B),
Field( 'C_id', db.C))
...can be generated with this code:
letters=['A', 'B', 'C']
fields=[]
for letter in letters:
db.define_table(letter, *fields)
fields=[Field(item) for item in letters]
Thanks a lot for the help!
On 7/4/10, mdipierro <mdipie...@cs.depaul.edu> wrote:
> No.
>
> Given db.define_table('sometable',*fields), you cannot add fields
> outside this statement but you can call the statement in a separate
> http request and add fields to the *fields list.
>
> On 4 Lug, 13:45, Rick Hultgren <sababa.sab...@gmail.com> wrote:
>> ...with other words -- how to add fields to a table that is already
>> declared? Is it possible?
>>
>> On 7/4/10, Rick Hultgren <sababa.sab...@gmail.com> wrote:
>>
>> > perhaps the table names will be changed, so please don't bother about
>> > "before" and "after"...the point is -- how to refer/link to the table
>> > name "locus", when that table is not yet created/declared/made?
>>
>> > On 7/4/10, Rick Hultgren <sababa.sab...@gmail.com> wrote:
>> >> Thanks for the answers. I'm trying to create these tables:
>>
>> >> db.define_table( 'substance',
>> >> Field( 'substance', db.substance),
>> >> Field( 'process', db.process),
>> >> Field( 'condition', db.condition),
>> >> Field( 'locus', db.locus),
>> >> Field( 'name'),
>> >> Field( 'main_name'))
>>
>> >> db.define_table( 'process',
>> >> Field( 'substance', db.substance),
>> >> Field( 'process', db.process),
>> >> Field( 'condition', db.condition),
>> >> Field( 'locus', db.locus),
>> >> Field( 'name'),
>> >> Field( 'main_name'))
>>
>> >> db.define_table( 'condition',
>> >> Field( 'substance', db.substance),
>> >> Field( 'process', db.process),
>> >> Field( 'condition', db.condition),
>> >> Field( 'locus', db.locus),
>> >> Field( 'name'),
>> >> Field( 'main_name'))
>>
>> >> db.define_table( 'locus',
>> >> Field( 'substance', db.substance),
>> >> Field( 'process', db.process),
>> >> Field( 'condition', db.condition),
>> >> Field( 'locus', db.locus),
>> >> Field( 'name'),
>> >> Field( 'main_name'))
>>
>> >> On 7/4/10, mdipierro <mdipie...@cs.depaul.edu> wrote:
>> >>> Could you explain to us in English what you are trying to model? I am
>> >>> sure there is a simpler solution using link tables.
>>
>> >>> On 3 Lug, 12:14, Rick Hultgren <sababa.sab...@gmail.com> wrote:
>> >>>> Thanks for the link. My actual problem is more complicated than the
>> >>>> example I gave. I realize that I need to link a field to a table that
>> >>>> isn't initiated yet (item2):
>>
>> >>>> objects = ['substance', 'process', 'condition', 'locus']
>> >>>> linksubobjects = ['locus', 'before', 'after']
>> >>>> unlinksubobjects = ['name', 'main_name']
>> >>>> for object in objects:
>> >>>> for item1 in linksubobjects+unlinksubobjects:
>> >>>> for item2 in objects:
>> >>>> fields=[Field(item1, 'reference
>> >>>> item2')]
>> >>>> db.define_table(object,*fields)
>>
>> >>>> I suppose the solution would be to initiate the table names and then
>> >>>> add the fields either in db.py, or in the controller file. But I have
>> >>>> no idea how to do this.
>>
>> >>>> On 7/3/10, Yarko Tymciurak <resultsinsoftw...@gmail.com> wrote:
>>
>> >>>> > The online book has a fairly useful search;
>>
>> >>>> > For your question, see:
>> >>>> >http://web2py.com/book/default/section/6/13
>>
>> >>>> > Regards,
>> >>>> > - Yarko
>>
>> >>>> > On Jul 3, 8:45 am, Rick <sababa.sab...@gmail.com> wrote:
>> >>>> >> Hi,
>>
>> >>>> >> I would like to link a table to its own model like this:
>>
>> >>>> >> db.define_table('person',
>> >>>> >> Field('name'),
>> >>>> >> Field('child', db.person))
>>
>> >>>> >> I understand that I should first initiate the table and then link
>> >>>> >> it
>> >>>> >> to itself. But how to do that?
>>
>> >>>> >> Thanks in advance for help!
