Metadata seems to be used frequently to describe a SharePoint list's structure. That structure allows the storage of data at the list item level.
How can I specify information about the list itself without relying on an additional column?
Ideally I want something like SPList.Properties ["Mykey"] = "MyValue"
PropertiesXml isn't settable but is there any way to alter the data it returns?
There is no property bag on the SPList object itself, however you can use the one on SPList.RootFolder. Its SPFolder object has a Properties property.
As an alternative to Alex' direct answer, you could store the metadata on your lists in a separate dedicated, possibly hidden, list.
Related
I have an odd issue.
I have client that wants a sharepoint list what is populated from a WCFService. That part is working quite well.
I have a bdcmodel that is mapping the WCF data and I can create an external list from the bdcmodel as well so that is working fine.
The issue I have is that one of the properties in the model is actually a collection of entities called Attributes. The objects in this collection simply have 2 properties Name and Value so really they are just a key value pair.
The client wants to see the list of attributes of the parent entity in the external list. So there would be an Attributes column and within that column would be the list of attributes for each parent object.
Is there even a way to do this? I am looking into Custom Field Types, but it seems like these are really intended to be singular values.
How would I create a list within and external list?
Any help anyone can give would be great even if its just to tell me that there really isn't a stable way to do this so I can go back to the client and tell them we will need to build a custom list to support this because the OOB external list and custom fields and custom field types won't support this kind of nested listing.
I decided to set up the custom field as a string and when I get my collection in from the BdcModel I am serializing it to JSON and then passing it to the field. When the field is viewed in display, edit or new I have overridden the FieldRenderingControl and I am tiling the collection out that way.
I have core data app with an entity OBSERVATION that has as one of its attributes DEALNAME.
I want to reference through Interface Builder or by making custom modifications to an NSArrayController a list of unique sorted dealnames so that I can use them in a pop-up.
I have attempted to use #distinctUnionOfSets (and #distinctUnionOfArrays) but am unable to locate the proper key sequence.
I can sort the ArrayController by providing a sort descriptor, but do not know how to eliminate duplicates.
Are the #distinct... keys the right methodology? It would seem to provide the easiest way to optimize the use of IB.
Is there a predicate form for removing duplicates?
Or do I need to use my custom controller to extract an NSSet of the specific dealnames, put them back in an array and sort it and reference the custom array from IB?
Any help would be appreciated. I am astounded that other have not tried to create a sorted-unique pop-up in tableviews.
You need to take a look at -[NSFetchRequest returnsDistinctResults]. That is the level you need to be handling the uniquing of data.
Although I do not have a definitive answer for you, I think there are two ways you can go about it.
The way you already started. You need to bind the contents array of the PopUp button, not just against the arrayController.arrangedObjects, but continue on the path and somehow filter only objects with distinct "DealName"s. This means - the arrayController presents ALL the entities (and may sort them for you) but the PopUp button will have its contents filter via some sophisticated binding to the array controller.
Make your filtering at the ArrayController level (as suggested in another answer here). Here it depends how you set up the array controller. If It is set up to use an "Entity" (vs. "Class") which means the array controller will fetch CoreData entities directly - you can modify its "Fetch" to only bring a subset of the "OBSERVATION" entities with distinct values of "DEALNAME". I don't know how to control WHICH entities are filtered out in this case. Otherwise, you can setup the arrayController to work with "Class" objects, and then you can fetch the entities yourself (in code) and populate the arrayController programmatically, with just the entities you like.
In the second option, the Popup button should be bound normally to the arrayController's arrangedObjects.
I made a feature that creates a list with some default data (with a list definition and all required XML)
I observed that when the list already exists, the data will be inserted again in the list... So I tried to make a "FeatureReceiver" to prevent the feature from creating the list if it already exists, but the base class of FeatureReceiver is an abstract class, so even if the list doesn't exists, I can't "call" the base function to continue the normal process...
Is there an easy way to do this or will I have to create the list through the FeatureReceiver by calling the XML file?
I would suggest that you create the lists and all the other stuff you have to do (add/remove fields, contenttypes etc) all through code. I usually never create any lists through xml. This might give you some guidance:
http://johanleino.wordpress.com/2009/08/12/howto-add-splist-based-on-a-custom-template/
I'm trying to make a custom property for a WebPart. The custom property should be a drop down with choices coming from a "choice" column from a content type. Is that even possible?
You have two options:
1) If your choices will never change then you can hardcode an enum with these values and use that as datatype for your custom property. SP will the automatically generate a drop down.
2) If you can't hardcode the values then you have to implement what is called an EditorPart where you can code the UI for handling entry of the custom property
You cannot data bind directly to a content type column as it does not exist as in a bindable form, only as an XML secification on the content type itself.
Better to specify the column as a lookup and databind to the list directly. However, that is not going to work well when you only want one lookup across multiple webs or site collections.
In that case create a list in a config site such as http://intranet/sites/config and code a lookup control to databind to that list. Then use the control in the webpart and in a custom field control on the content type.
A bit of work, but worth it if you require SharePoint edit control (versioning, security etc) access to the contents of the lookup and a single (changeable) source of data across the entire site.
When beginning to develop against SharePoint I did not fully understand all the ins and outs initially. I created a list definition (for a document library) and associated various custom actions to it. Unfortunately, I used the following for the list definition itself:
<ListTemplate...
...
Type="101"
...
And to register the CustomActions against the list:
<CustomAction...
...
RegistrationType="List"
RegistrationId="101"
...
Of course, this means that the custom actions are visible for all document libraries where the feature is activated which is undesirable behaviour. Also, there are lots of these document libraries that have been created from the above list definition in production.
What is the best way to fix this problem? My assumption is that I somehow need to change the "Type" attribute of the already existing lists, but I do not know how to do that. Can it be done via some direct SQL manipulation perhaps? Or is there a better way?
Note: I can see that the AllLists table has a column tp_ServerTemplate, is that the right thing to change?
Modifying the SharePoint database is completely unsupported by Microsoft. Please do not do this on production!
Another option is to create a content type and associate the custom action with that. You may need to write a simple console application to iterate through your existing document libraries and add the content type so it is available for use. The existing documents that you'd like the custom action to apply to would need their content types changed as well.
From some quick initial testing it does look like changing the AllLists table does the trick.
So steps to resolve:
1) Change List Definition Type attribute to be a unique value (for example 11000)
2) Change the CustomAction RegistrationId attributes to be the same (11000)
3) Update the tp_servertemplate column in the AllLists table to be the new template Type (11000) for all the relevant lists.