Hi Pascal, Thannks for the detailed explanation!
Pascal Voitot wrote: > Hello, > by default, Classes aren't stored in any specific table but are stored as > XML with the document... > You can trigger an option called UseClassesTable or something like that > which will make classes be stored in tables using the hibernate mapping > defined by XWIki (tables xwikiclasses and xwikiclassesprop)... > You can even provide your custom mapping... > > Anyway, this is not important because the class is the data structure and > what you certainly need is to keep objects and property values. The objects > are stored in the XWIkiObjects table and properties in the XWikiProperties > table using objectID as external key and also in the specific XWikiTypeTable > (XWikiStrings, XWikilongs etc...) depending on the type of the property. > Please, what is the so called UseClassesTable option intended for? > Concerning the deletion of properties, it doesn't exist yet because it is > not so simple... But I'm currently working on a solution for that... I > should propose a demo of it very soon... > These are great news! It is frequent to make a mistake as Kammy stated. And event more frequent is that a group changes its mind about the design of a given class. > For the time being, this is not really easy because you have to go in the > XWikiDoc table and modify the XWD_CLASS_XML to remove the unwanted field... > Then you have also to find all the objects you created for this class and > remove the unwanted fields... > > regards > Pascal > There is still a Kamy's question left: "How can we access the values of any instance of the created class?" It may seem simple, but I and others are having a hard time trying to access and show these values. For instance, see this... http://tinyurl.com/3f44gm Please, could you elaborate your answer in that sense? Could it be advisable to add an example about how to access properties values in a given object to the FAQ tutorial? Perhaps how to retrieve all questions with a given string in question property. There is a FAQs entry about this (http://tinyurl.com/6rgm8h). I am sure this is enough for programmers, but it is a bit "conceptually dense" for non-programmers like me! As usually an example would help. Thanks for your help, Ricardo > On 4/15/08, Kamna Jain <[EMAIL PROTECTED]> wrote: > >> Hello all, >> >> I went through the TodoClass tutorial and found it useful. >> I have a question regarding this functionality. >> Are these classes or the values of the properties for its instances saved >> in >> any table in the Xwiki database? >> Say, we use Classes and Objects to create a form that the user needs to >> create a document. Will the form values be saved in a database? >> How can we access the values of any instance of the created class? >> >> Also, how do we Delete a property from a Class definition? (If added by >> mistake while creating the class) >> >> Thanks for all help >> _______________________________________________ >> devs mailing list >> [email protected] >> http://lists.xwiki.org/mailman/listinfo/devs >> >> > _______________________________________________ > devs mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/devs > > > -- Ricardo RodrÃguez Your EPEC Network ICT Team _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
