No, I don't think populate looks at the compute attribute -- it just looks at the field type and generates an appropriate value.
On Monday, January 16, 2012 3:21:16 PM UTC-5, tsvim wrote: > > Could be it works, but for populate it doesn't. I was hoping to generate a > rule that would force populate to behave correctly. > For the user I can obviously deal with it in AJAX. Is it possible that > populate disregards the compute field? > > Tsvi Mostovicz > [email protected] > www.linkedin.com/in/tsvim > > > > On Mon, Jan 16, 2012 at 08:35, Anthony <[email protected]> wrote: > >> db.define_table('accounts', >>> Field('name','string'), >>> Field('parent_account','**reference accounts'), >>> Field('account_type','string')**) >>> >>> What I'm trying to achieve is to create a tree-like structure. So we >>> have 5 "root" accounts, which can each hold some sub-accounts etc. >>> Now the account_type must be the same for all the children of a certain >>> account. So the root accounts pre-determine all of the children's account >>> type, rendering it unwritable for a child account. >>> For some reason the following didn't work for me: >>> >>> account_types = ['a','b','c'] >>> db.accounts.account_type.**requires = IS_IN_SET(account_types) >>> db.accounts.account_type.**required = True >>> db.accounts.account_type.**compute = lambda x: >>> x['parent_account'].account_**type >>> db.accounts.account_type.**writeable = lambda x: (x['parent_account'] >>> == 0) >>> >> >> For the "compute" attribute, maybe: >> >> db.accounts.account_type.compute = lambda r: >> db.accounts[r.parent_account].account_type if r.parent_account else None >> >> However, I don't think you can set the "writeable" attribute this way >> because you won't know if a parent account is going to be specified until >> after the new record is submitted, which happens after you have to decide >> whether to make the account_type field writeable. Instead you might need >> some client side JS and Ajax to dynamically set the account_type if the >> user selects a parent_account in the form. >> >> Anthony >> >> >
