topic Re: Adding children to store root in Alfresco Archive

Adding children to store root

hsjawanda — Fri, 17 Feb 2006 01:44:40 GMT

Hi,I have been trying a few things, have been getting unexpected results, and now I am confused. So here are my questions:Is there anything special about adding a node (say, a folder) directly as a child of a store root? I have a store with protocol "workspace" – will the following code work for ad

Re: Adding children to store root

rwetherall — Mon, 20 Feb 2006 10:32:03 GMT

Hi,

No there is nothing special about the the root node other than its association to its children is called 'children' rather than a folder which is called 'contains'.

I've updated the code below to reflect this:


// this.storeRef points to the store I am interested in.
NodeRef rootNode = nodeService.getRootNode(this.storeRef);

// Creating a folder as a direct child of storeRef
ChildAssociationRef childAssocRef = nodeService.createNode(rootNode,
        ContentModel.PROP_CHILDREN, QName.createQName(
                NamespaceService.CONTENT_MODEL_1_0_URI, folderName),
        ContentModel.TYPE_FOLDER);
‍‍‍‍‍‍‍‍‍‍

What are the differences between creating child associations and creating plain-jane associations (NodeService#createAssociation())?

* A child association implies a hierarchy between nodes.
* An association is a relationship between two nodes (with no hierarchy).

Cheers,
Roy

Re: Adding children to store root

hsjawanda — Fri, 24 Feb 2006 03:47:14 GMT

Hi Roy,

No there is nothing special about the the root node other than its association to its children is called 'children' rather than a folder which is called 'contains'.

This is only a naming convention, right? Will any constraints be violated if the wrong child-association name gets used?

Deleting a container node deletes its children too, right?

Thanks for your reply to my first posting.

Re: Adding children to store root

rwetherall — Fri, 24 Feb 2006 09:28:33 GMT

Hi,

Yes, the name of the association can be anything you want, it is the type of the association (eg: 'children') that must follow the model defintion.

Yes, when a node is deleted its children are deleted too.

Cheers,
Roy

Re: Adding children to store root

soeursourire — Fri, 24 Feb 2006 14:52:27 GMT

I was thinking I understood how to add a new node in MySQL and I wanted to add a node function in this database under the node People at the same level than Person but not in the node Person. (Person and function are brothers). So I was doing as follow:

- a new class FunctionService that is almost exactly the same than PersonServiceImpl

- in MyNewUserWizard in init() I initialize my function service :
this.functionService = new FunctionService();
this.functionService.setNodeService(this.nodeService);
this.functionService.setSearchService(this.searchService);
//this.functionService.setStoreRef(Repository.getStoreRef());

-in MyNewUserWizard in startWizardForEdit() I added this:
Node nodeFN = new Node(ref); setFunction(nodeFN);
I have a node Node function;

-in MyNewUserWizard in populate() I added this:
Map<String, Object> propsFN = getFunction().getProperties();

-And in finish(), I added :
Map<QName, Serializable> propsFN = new HashMap<QName, Serializable>(5);
propsFN.put(MyContentModel.PROP_FN_ID, this.functionId);
String assocNameFN = QName.createValidLocalName(String.valueOf(this.functionId));
NodeRef newFunction = this.functionService.createFunction(propsFN);

However, while doing that when I call the function finish() I have errors such as Java.lang.NullPointerException. I have apparently a problem in getPeopleContainer (called by createFunction) while doing this:
NodeRef rootNodeRef = this.nodeService.getRootNode(storeRef);
List<NodeRef> results = searchService.selectNodes(rootNodeRef, PEOPLE_FOLDER, null, namespacePrefixResolver, false);

What do I do wrong here?
Thanks for help.

Re: Adding children to store root

soeursourire — Mon, 27 Feb 2006 11:49:14 GMT

I found the problem… my NameSpacePrefixResolver was null. So now I can add a node function in the node People at the same level than the node person however while browsing the NodeBrowser if I first check a node person then the node function has the same properties than person and respectively. And then when I want to check again the node function I have this error:

cannot add component with id 'aspects' and path : {Component-Path : [Class: javax.faces.component.html.HtmlDataTable,Id: aspects]} to its parent component. This might be a problem due to duplicate ids.

I hope somebody will agree for helping me.. thanks

Re: Adding children to store root

gavinc — Mon, 27 Feb 2006 14:03:15 GMT

This is more than likely a bug with the node browser. This error happens in JSF sometimes when a component is not given an explicit id.

Try closing the node browser and returing to it as a workaround.

An issue in JIRA has been raised for this: http://www.alfresco.org/jira/browse/AWC-563

Re: Adding children to store root

soeursourire — Mon, 27 Feb 2006 15:35:22 GMT

Thanks a lot for the answer. So does that mean as well that when I go in my node function and I see the properties of my node person instead it is a bug of nodebrowser? How and where can I check in the database if my nodes are correctly filled?

I also noticed than when I delete some users that I created, they are removed from node browser but all usernames are kept in the database, is it normal?
Thus I wanted to delete some of these usernames from MySQL by command line but now I cannot log in to Alfresco as admin…

Thanks again

Re: Adding children to store root

soeursourire — Mon, 27 Feb 2006 16:11:19 GMT

My god!! Help please!
Since I modified something in the database I cannot log in as admin and have this error page:

javax.portlet.PortletException: Error calling action method of component with id loginForm:submit

caused by:
javax.faces.FacesException: Error calling action method of component with id loginForm:submit

caused by:
javax.faces.el.EvaluationException: Exception while invoking expression #{LoginBean.login}

caused by:
org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [org.alfresco.repo.security.permissions.impl.hibernate.RecipientImpl#org.alfresco.repo.security.permissions.impl.hibernate.RecipientImpl@35f5b8]

What can I do now? I reinstalled MySQL and installed the last version of Alfresco and have this error!!

Re: Adding children to store root

kevinr — Mon, 27 Feb 2006 18:36:25 GMT

Your issue may be related to this problem?
http://www.alfresco.org/forums/viewtopic.php?t=1125&highlight=

It looks like a similar error (it may not be) - keep an eye on the post and we should resolve it soon.

Kevin

Re: Adding children to store root

soeursourire — Tue, 28 Feb 2006 10:12:08 GMT

Thanks for the fast answer.
Is there a wiki or documentation about the structure of the database (a entity-relationship diagram)?

Where can I check the properties values of a node person (from node people) in the database by sql command line?

Thanks

Re: Adding children to store root

kevinr — Tue, 28 Feb 2006 11:43:54 GMT

This query will find the users from the node_properties table:


select string_value, guid from node_properties where protocol='user' and qname='{http://www.alfresco.org/model/user/1.0}username';
‍‍‍

Get the value the "guid" column value for the user you are interested in, then execute something like this to see all the properties for that user instance:


select * from node_properties where guid='9e86231c-9cb7-11da-a085-9f5761485f4e';
‍‍‍

Remember that the passwords field is encrypted.

Hope this helps,

Kevin

Re: Adding children to store root

soeursourire — Tue, 28 Feb 2006 16:39:39 GMT

Thanks for help. So that allows me to access the users properties (username, password…) but not the person properties (firstname, lastname, etc…) ?

Please would you mind telling me where the node 'People' ("/syseople") is created in the code? the node 'person' is created while creating a user in PersonService but where is created the node 'people'?

Thanks.

Re: Adding children to store root

soeursourire — Tue, 28 Feb 2006 18:08:12 GMT

Oki I found… it is done while calling the function getPeopleContainer right?

Another question… in the function startWizardForEdit from NewUserWizard what does this code means:

UIActionLink link = (UIActionLink) event.getComponent();
Map<String, String> params = link.getParameterMap();
String id = params.get("id");

What is this id? the uuid of the node?
If I am creating 2 different nodes during this newuserwizard, how will he choose which uuid to use? How can I be sure that if I create two different nodes in sys:system I will have different uuid for the children of the first node and the children of the second node?

Thanks in advance

Re: Adding children to store root

soeursourire — Wed, 01 Mar 2006 07:51:57 GMT

Another question as well…
I am able to create a new node Functions under System. Then I create nodes function in Functions. But in the NodeBrowser it appears that the node function I create has the same uuid than the node person that I create at the same time. Can it be due to nodebrowser bug? or because I am badly using userTransaction?

Then I wanted to add a class FunctionsBean similar to UsersBean to display all functions in my jsp page users.jsp however I have error message in my jsp page saying that it cannot find my functionService, where should I define the bean functionService and the bean FunctionsBean? in faces-config, in application-context, in authentication-context, in network-protocol..?

Re: Adding children to store root

soeursourire — Wed, 01 Mar 2006 15:56:14 GMT

I think I managed to add my nodes correctly but now I would like to get all nodes like when you get all person nodes with the class UsersBean. But I do not understand how this UsersBean is instantiate (where and when the nodeService is defined for example)?

<a:richList id="users-list" binding="#{UsersBean.usersRichList}" viewMode="details" pageSize="10"
styleClass="recordSet" headerStyleClass="recordSetHeader" rowStyleClass="recordSetRow" altRowStyleClass="recordSetRowAlt" width="100%"
value="#{UsersBean.users}" var="r" initialSortColumn="userName" initialSortDescending="true">

Re: Adding children to store root

gavinc — Thu, 02 Mar 2006 09:00:03 GMT

Hi,

UsersBean is a JSF managed bean, as such it is defined in the JSF configuration files (in our case faces-config-beans.xml). The JSF framework instantiates the bean when it is required. The NodeService is also defined in the config file as a managed property, this means the nodeService object is "injected" into the bean, ready for your code to use.

I would highly recommend doing some background reading on JSF, there are several great sites with loads of articles and tutorials, some we've found useful are:

http://www.jsftutorials.net
http://www.jsfcentral.com
http://www-128.ibm.com/developerworks/library/j-jsf1 (series of 4 articles introducing JSF)

These may help answer a few of your questions and give you a better insight into how the Alfresco web client works.

Hope this helps

Re: Adding children to store root

kevinr — Thu, 02 Mar 2006 10:07:03 GMT

Gavin is correct. Also to understand the architecture of how our services are defined and configured using Spring you should take a look at the Spring Framework tutorials and do a a little background reading. Once you are familiar with JSF and Spring you are ready to get deeper in Alfresco.

http://www.theserverside.com/resources/article.jsp?l=SpringFramework
http://www.springframework.org/documentation

Thanks,

Kevin

Re: Adding children to store root

soeursourire — Thu, 02 Mar 2006 14:26:48 GMT

Thanks a lot for your advices. I started looking at the documentation and I am getting more familiar to JSF.

Now I am getting into troubles while doing this:

List<ChildAssociationRef> childRefs = nodeService.getChildAssocs(functionRef);

although my nodeService and functionRef seem correct (good reference):
functionRef= workspace://SpacesStore/e79e7952-a87a-11da-ab9f-0774da8876d0
nodeService= org.alfresco.repo.node.db.DbNodeServiceImpl@1e932fcf
storeRef= workspace://SpacesStore

And I get this error message:
A system error happened during the operation: Bad credentials presented

What kind of error is it? Can it be due to my insertion of nodes in the repository (when I add a node Functions under system and some nodes function in Functions)?

Thanks again

Re: Adding children to store root

soeursourire — Sat, 04 Mar 2006 10:21:43 GMT

In your WIKI when you are talking about XPath Search while doing that:
List<ChildAssocRef> answer = nodeService.selectNodes(rootNodeRef, "*", null, namespacePrefixResolver, false);

I guess it is a mistake, nodeService has no selectNodes. We should use searchService right?