I apologize if this is more of a DB question than a web2py question, but I'm
having trouble with populating a drop down menu in the admin interface. I
have a table (called 'version') with two keys ('name' and 'version') and a
third column 'component_id'. This table records which versions of an
application use which software component: Example data:
Name, Version, Component
credit, 1.0.0 commons_all_1.2
credit, 1.0.1, commons_all_1.3
credit, 1.0.0 commons_pools_6.3
credit, 1.0.1, commons_pools_6.5
Interpretaion: The credit application 1.0.0 uses commons_all_1.2 and
commons_pools_6.3
The credit application 1.0.1 uses commons_all_1.3 and
commons_pools_6.5
The problem occurs when I reference the version table from another table.
The drop down list contains:
credit 1.0.0
credit 1.0.0
credit 1.0.1
credit 1.0.1
I want the drop down menu to display the set {name, version}, instead of the
cartisian product of the two keys. Here's my db.py:
db.define_table('component',
Field('component_name'),
Field('component_version'),
Field('label'))
db.define_table('version',
Field('name'),
Field('version'),
Field('component_id', db.component))
db.define_table('report',
Field('from_id', db.version), # Drop down menu has cartisian
product of version.name X version.version
Field('to_id', db.version))
db.version.component_id.requires = IS_IN_DB(db, db.component.id,
'%(component_name)s %(component_version)s')
db.report.from_id.requires = IS_IN_DB(db, db.version.id, '%(name)s
%(version)s') # Again, I want a set, not a list.
db.report.to_id.requires = IS_IN_DB(db, db.version.id, '%(name)s
%(version)s')
Thanks,
C. helck
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