[xwiki-users] Dynamic number of fields in Class
This post has NOT been accepted by the mailing list yet. Hello all, if this has already been answered, please let me know where, I have searched all over the place!! I want to have a class that contains a dynamic number of multiple fields. Think of it like say a shopping cart. You have one ShoppingCart class that can contain x number of items. When you edit the shopping cart, you can click add to add another item, or delete to delete an item from the list. Or maybe another example would be a RecipeClass, in which you would add in ingredients and stuff. So you would have a SesameChickenRecipe, and it would contain maybe 1 chicken, 2 tablespoons of salt, 4 bat wings, and so on. Is it possible, and if so is there any documentation you can point me to, or a tutorial, or example?? Also, is it appropriate to post this question in the Xwiki-Users forum or the Xwiki-Dev forum? Thanks so much in advance! -- View this message in context: http://xwiki.475771.n2.nabble.com/Dynamic-number-of-fields-in-Class-tp758177... Sent from the XWiki- Users mailing list archive at Nabble.com.
Hi, The scenarios you describe are definitely possible to achieve with XWiki. The way to realize what you want is to have a several objects per item type (and not several fields of the same object). For example, for a shopping cart you would have for each page with a cart : - An object of class MyApp.Cart - N number of objects of class MyApp.CartItem Then adding/removing items in the cart is simply a matter of adding/removing cart item objects from the page. And yes, users list is the right place for this kind of question. The dev list concerns the development of the XWiki software itself. Hope this helps, Jerome On 10/12/2012 10:15 PM, poppakap wrote:
This post has NOT been accepted by the mailing list yet. Hello all, if this has already been answered, please let me know where, I have searched all over the place!!
I want to have a class that contains a dynamic number of multiple fields. Think of it like say a shopping cart. You have one ShoppingCart class that can contain x number of items. When you edit the shopping cart, you can click add to add another item, or delete to delete an item from the list.
Or maybe another example would be a RecipeClass, in which you would add in ingredients and stuff. So you would have a SesameChickenRecipe, and it would contain maybe 1 chicken, 2 tablespoons of salt, 4 bat wings, and so on.
Is it possible, and if so is there any documentation you can point me to, or a tutorial, or example?? Also, is it appropriate to post this question in the Xwiki-Users forum or the Xwiki-Dev forum?
Thanks so much in advance!
-- View this message in context: http://xwiki.475771.n2.nabble.com/Dynamic-number-of-fields-in-Class-tp758177... Sent from the XWiki- Users mailing list archive at Nabble.com. _______________________________________________ users mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/users
-- Peace, —Jerome
Thank you so much. I am ALMOST able to understand, sorry for being a newbie here... but I have an AppWithinMinutes "application". There is a ShoppingCartHome with a livetable containing multiple ShopptingCarts. The livetable works great, and allows you to edit a shopping cart in its list. When you edit a ShoppingCart, you have all of the fields defined in the ShoppingCartClass, all of which are a fixed quantity of each. My ShoppingCart.ShoppingCartClass contains: ShoppingCart.ShoppingCartTemplate and a ShoppingCart.ShoppingCart If I edit the "class" of ShoppingCart.ShoppingCartClass, I can add in various Field Types, such as Long text, short text, date picker... etc. There isn't an option to add in a field type of my ShoppingCartItemClass If I edit the "objects" of ShoppingCart.ShoppingCartClass, I can add in objects such as ClassSheetBinding, DocumentSheetBinding... etc. If I were to add in a ShoppingCartItem object on this page, I am only allowed to enter a specific number of them. I don't see where to add in the option of one-to-many ShoppingCartItem classes. -- View this message in context: http://xwiki.475771.n2.nabble.com/Dynamic-number-of-fields-in-Class-tp758177... Sent from the XWiki- Users mailing list archive at Nabble.com.
Ok, it appears that there isn't an "automagical" way to do it. I was hoping that I might be missing something simple, but I guess that I need to do it in code. In the ShoppingCartSheet, I added a little bit of velocity script to add in the ShoppingCartItem object with a button click post. So in the sheet I will have to take care of listing out the page's items, adding and deleting them. Is that what you meant? It would be pretty cool if a "Field Type" had a dynamic count to it though, so that if you added a field to a class property list, it would take care of itself. That would rock. Thanks again, all of you guys are extremely fast to respond, and I really appreciate your kindness. -- View this message in context: http://xwiki.475771.n2.nabble.com/Dynamic-number-of-fields-in-Class-tp758177... Sent from the XWiki- Users mailing list archive at Nabble.com.
On Sat, Oct 13, 2012 at 4:04 PM, poppakap <[email protected]> wrote:
Ok, it appears that there isn't an "automagical" way to do it.
I was hoping that I might be missing something simple, but I guess that I need to do it in code.
AppWithinMinutes creates a single xclass per application (e.g. ShoppingCartClass). In your case you need one more xclass (at least) for the shopping cart item (following Jerome's suggestion). You need to create this class yourself and modify ShoppingCartSheet to add support for managing the shopping cart items (as you said below). As a result your application entries will have one object of type ShoppingCartClass and one or more objects of type ShoppingCartItemClass.
In the ShoppingCartSheet, I added a little bit of velocity script to add in the ShoppingCartItem object with a button click post. So in the sheet I will have to take care of listing out the page's items, adding and deleting them.
Is that what you meant? It would be pretty cool if a "Field Type" had a dynamic count to it though, so that if you added a field to a class property list, it would take care of itself. That would rock.
The xclass is a descriptor for a set of xobjects. It holds the list of properties, their names, types, etc. but it doesn't hold any values! So you can't use the xclass to store data, you have to use xobjects, which are instances of an xclass. Objects assign values to the properties defined by the class. Note that when you edit your AWM application, you can set default values to the xclass properties but those values are not saved in the class but in the template, ShoppingCartTemplate, which is a page that contains an object of type ShoppingCartClass. Hope this helps, Marius
Thanks again, all of you guys are extremely fast to respond, and I really appreciate your kindness.
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On 10/15/2012 02:11 AM, Marius Dumitru Florea wrote:
On Sat, Oct 13, 2012 at 4:04 PM, poppakap <[email protected]> wrote:
Ok, it appears that there isn't an "automagical" way to do it.
I was hoping that I might be missing something simple, but I guess that I need to do it in code.
AppWithinMinutes creates a single xclass per application (e.g. ShoppingCartClass). In your case you need one more xclass (at least) for the shopping cart item (following Jerome's suggestion). You need to create this class yourself and modify ShoppingCartSheet to add support for managing the shopping cart items (as you said below). As a result your application entries will have one object of type ShoppingCartClass and one or more objects of type ShoppingCartItemClass.
And to be explicit, that's outside the scope of the AppWithinMinutes wizard, which is optimized for simple applications. More complex applications, such as yours, need writing some code.
In the ShoppingCartSheet, I added a little bit of velocity script to add in the ShoppingCartItem object with a button click post. So in the sheet I will have to take care of listing out the page's items, adding and deleting them.
Is that what you meant? It would be pretty cool if a "Field Type" had a dynamic count to it though, so that if you added a field to a class property list, it would take care of itself. That would rock.
The xclass is a descriptor for a set of xobjects. It holds the list of properties, their names, types, etc. but it doesn't hold any values! So you can't use the xclass to store data, you have to use xobjects, which are instances of an xclass. Objects assign values to the properties defined by the class.
Note that when you edit your AWM application, you can set default values to the xclass properties but those values are not saved in the class but in the template, ShoppingCartTemplate, which is a page that contains an object of type ShoppingCartClass.
Hope this helps, Marius
Thanks again, all of you guys are extremely fast to respond, and I really appreciate your kindness.
-- Sergiu Dumitriu http://purl.org/net/sergiu/
participants (4)
-
Jerome Velociter -
Marius Dumitru Florea -
poppakap -
Sergiu Dumitriu