Florent Guillaume wrote: > On 14 Jun 2005, at 20:24, CP Hennessy wrote: >> Anahide Tchertchian wrote: >>> CP Hennessy wrote: >>>> I've a class which has several fields, some of these >>>> fields are filled from a database and some are filled >>>> in by the user. I'm trying to figure out what is the >>>> correct way in CPS to do this. >>>> >>>> My user enters a clientId and "Add" which causes data >>>> to be retrieved from a database for a few fields. The >>>> user should be presented with a form where the relevant >>>> fields are populated from the database info and where >>>> several other fields should be entered by the user >>>> before the new object is created. >>>> >>>> I'm currently basing my new class on CPSDocument and >>>> I'd really like to know what I need to change to get >>>> the behaviour mentioned above. If anyone can point me >>>> at a simple example, then it would be even better. >>> >>> It looks like you could achieve the same behaviour by defining >>> default >>> expressions on the fields that are supposed to be populated from your >>> database. Maybe you just have to define a way to access this >>> database in >>> your application, but it does not have to be on your document class. >> >> Thanks for the hint Anahide. >> I've tried to use it but have one problem. Using the following : >> 'default_expr': 'python:portal.REQUEST.widget__name', >> >> in the schema works to initialize the data in the form. This >> expression is >> used when populating the creation form AND when the object is actually >> being created. >> >> However the problem with this approach is that if this data is for >> a field >> that should be readonly (i.e. the data coming from the database >> should not >> be changed), then there is no field widget__name :( >> >> What is the correct approach for this ? >> To create a new "create_form" for my class ? > > Another way would be to > - have a schema+layout asking the initial information, and render it > and parse it without underlying object using the renderLayout method > of the layouts tool. It uses a MappingStorageAdapter to fill a > mapping (dict) instead of an object. > - then with this info get what you need from the database, and start > the creation of a normal object using renderCreateObjectDetatailed > with a pre-filled request but validate=0.
Hi Florent Thanks for this idea. In the meantime I've implemented it slightly differently. I've saved the data in the SESSION object and retrieved it from there. This seams to work with no obvious problems. However I am not sure if this is a good idea. Any advise ? Also, during creation, I'm trying to initialize the object with a more relevant "id" attribute. From what I can see in the code, the "id" attribute is calculated from the "title", but how can I programatically set the title without before the object is created ? Thanks CP _______________________________________________ cps-devel mailing list http://lists.nuxeo.com/mailman/listinfo/cps-devel
