Thank you for the answer!
On Monday, April 7, 2014 11:34:33 PM UTC+2, 黄祥 wrote:
>
> 1) when the form is accessed some of the fields should already contain a
>> hint which is not necessarily the default value of the field
>>
>
> i think you can achieve it using default
> e.g.
> table.registration_date.default = request.now
>
I'm not sure I can use *default* for my purpose. The hint should depend on
which of the forms I'm using to fill the table row data. If the *default *value
is a function how can I influence it's behaviour from the form?
> 2) the user should select a value from a drop-down list and some other
>> fields should be filled with other hints (the data used for giving these
>> hints should come from another table)
>>
>
> you can achieve it when you have the relation on your table and set the
> IS_IN_DB() validation for the field that reference to another table
> e.g.
> db.define_table('branch',
> Field('address', 'text'),
> format = '%(address)s')
>
> db.define_table('header',
> Field('branch', 'reference branch'),
> format = '%(branch)s')
>
> db.header.branch.requires = IS_IN_DB(db, db.branch.id, '%(address)s')
>
Maybe I was not clear with my explanation. In my app I've already used
references, but what I want here is different. Let's say I have two tables:
db.define_table('ice_cream_orders',
Field('flavour', 'text'),
Field('quantity', 'double'))
db.define_table('hints',
Field('client', 'text'),
Field('flavour_hint','text'))
Assume I'm creating a form to make insertions in the first table. In the
form I want a drop-down list containing all the possible values of "client"
from
the second form. If the user selects a client, the corresponding value of
"flavour_hint" should appear as a hint for the field "flavour". The user
should be able to modify the value of "flavour" also after the hint is
given.
Carlo
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