Thank you very much, Christian, for your answer of a few days ago.
By putting a typo in the top configure.zcml file of collective.tin, I
checked that all the zcml stuff was being loaded.
Then, by some debugging with pdb, I realized that in my case the directive
involved wasn't
<adapter
factory="sqlalchemy.orm.session.object_session"
provides=".interfaces.ISession"
for="*"
/>
but the folowing more specific one
<adapter
factory=".utils.get_session_from_database_name"
provides=".interfaces.ISession"
for=".interfaces.IDatabaseFromParent"
/>
and that, in the body of get_session_from_database_name, the call
getUtility(IDatabase, context.database_name)
wasn't returning the utility since the database_name wasn't correct.
Probably a more specific exception raised early in the code would have made
easier to spot my error.
As to my "question 2"
How can I access the adapter registry where the adapters defined in the
<adapter> directives are registered?
it seems that the related information is rooted in the code
siteinfo = SiteInfo()
inside the module zope/app/component/hooks.py
Now I made some progress in using collective.tin
Then I met another problem, but I'll mention it in another post.
Giovanni Toffoli
----- Original Message -----
From: "Christian Klinger" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, August 27, 2008 12:17 PM
Subject: [Product-Developers] Re: How to investigate a "could not
adapt"problem
Giovanni Toffoli schrieb:
Hi all,
in developing a product above collective.lead and collective.tin, I get a
TypeError such as:
TypeError: ('Could not adapt', <PersonTitleFolder at
/fulbright_db/fulbright/persontitlefolder.2008-08-16.9942504507>, ('Could
not adapt', <PersonTitleFolder at
/fulbright_db/fulbright/persontitlefolder.2008-08-16.9942504507>,
<InterfaceClass collective.tin.interfaces.ISession>)
The configure.zclm file of collective.tin includes the following
directive:
<adapter
factory="sqlalchemy.orm.session.object_session"
provides=".interfaces.ISession"
for="*"
/>
On the other hand, using zopepy I can execute
from sqlalchemy.orm.session import object_session
I would like to investigate a little
- if and why the configure.zclm file of collective.tin hasn't been loaded
If you use buildout then you have to add collective.tin to the [zcml] of
your buildout.cfg
And the suffix of configure should be zcml not zclm.
- if and why some directives inside it aren't effective in my case.
Thus I have 2 questions
1.
Is there a way of tracing (getting a log of) the loading of all the
configure.zcml files, starting from site.zcml ?
I´m intrested in this as well.
Btw. you can make a typo in your configure. Then you will get an error on
startup.
2.
How can I access the adapter registry where the adapters defined in the
<adapter> directives are registered?
In the documentation of the package zope.interface I find how to create
and lookup directly (by interface) an adapter register, but I don't know
which adapter register is used by my Zope/Plone site.
You can try with queryadapter from zope.component package.
Obviously I would also appreciate suggestions for other approaches of
investigating the problem.
Thank you very much in advance, Giovanni Toffoli
HTH Christian
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