On 7/19/06 6:35 PM, [EMAIL PROTECTED] wrote:
> I've found a minor glitch, though: Adding relationships to a table
> doesn't seem to work after auto_initialize() gets called. In fact,
> a call to add_relationships() *after* auto_initialize() will simply
> be ignored. Calling add_relationships() *before* auto_initialize(),
> works fine, though.
It's not "ignored." It does just what it's supposed to do: it adds metadata
for a new relationship :) What you mean is that no new methods are created
for you. Here's what I wrote in a thread from a few weeks ago:
"Adding or modifying columns or relationships does not automatically cause
any methods to be created. You're merely modifying the metadata. The
method creation process reads the metadata, but it is a separate task
controlled by its own methods.
Methods are created during calls to initialize() or auto_initialize(). There
are also explicit make_*_methods() methods. Finally, each column and
relationship has its own make_methods() call used to make methods just for
that particular piece of metadata."
So, if you add or modify a column, foreign key, or relationship, you must
also subsequently cause the appropriate make_methods() methods to be called
to, well, make the methods :)
At that point, if some methods have already been created (say, because you
already auto_initialize()d once), then you have to decide what to do if/when
there is a conflict with an existing method. Read about the
"preserve_existing" and "replace_existing" parameters in the
Rose::DB::Object::Metadata documentation for more information.
> use base "My::DB::Object";
> __PACKAGE__->meta->table('one');
>
> __PACKAGE__->meta->auto_initialize();
>
> __PACKAGE__->meta->add_relationships(
> myrel => {
> type => "one to one",
> class => "Two",
> column_map => { to_two => 'id' },
> });
As a side note, you should consider using the (relatively new) setup()
method instead of calling table(), add_relationships(), etc. separately.
The setup() method is the "officially recommended" way to do it, since it
will prevent a class from being "double-initialized" accidentally (and it
saves some typing too).
To auto-initialize in a setup() call, just pass a key/value pair like this:
auto_initialize => [],
at the end of the setup() params.
-John
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