After launching the GMF project, I get a new window to make my own model.
After placing some nodes and connections, I should calculate according to their attributes. At first, HOW can I obtain all the information of every node and every connection?
First , let's get the relevant editor:
DomainDiagramEditor d= (DomainDiagramEditor) PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
Now, you can either get all the editparts in your diagram , getting the relevant model from them:
final List children = d.getDiagramEditPart().getChildren();
gets you a list of EditParts.
Or, you can get the model objects directly with:
EObject element = d.getDiagram().getElement();
EList<EObject> eContents_ = element.eContents();
That gives you a list of all the model objects in the active editor.
Hope that answers your question
Related
In case we had the model:
class Publication(models.Model):
title = models.CharField(max_length=30)
class Article(models.Model):
publications = models.ManyToManyField(Publication)
According to: https://docs.djangoproject.com/en/4.0/topics/db/examples/many_to_many/, to create an object we must have both objects saved before we can create the relation:
p1 = Publication(title='The Python Journal')
p1.save()
a1 = Article(headline='Django lets you build web apps easily')
a1.save()
a1.publications.add(p1)
Now, if we called delete in either of those objects the object would be removed from the DB along with the relation between both objects. Up until this point I understand.
But is there any way of doing that, if an Article is removed, then, all the Publications that are not related to any Article will be deleted from the DB too? Or the only way to achieve that is to query first all the Articles and then iterate through them like:
to_delete = []
qset = a1.publications.all()
for publication in qset:
if publication.article_set.count() == 1:
to_delete(publication.id)
a1.delete()
Publications.filter(id__in=to_delete).delete()
But this has lots of problems, specially a concurrency one, since it might be that a publication gets used by another article between the call to .count() and publication.delete().
Is there any way of doing this automatically, like doing a "conditional" on_delete=models.CASCADE when creating the model or something?
Thanks!
I tried with #Ersain answer:
a1.publications.annotate(article_count=Count('article_set')).filter(article_count=1).delete()
Couldn't make it work. First of all, I couldn't find the article_set variable in the relationship.
django.core.exceptions.FieldError: Cannot resolve keyword 'article_set' into field. Choices are: article, id, title
And then, running the count filter on the QuerySet after filtering by article returned ALL the tags from the article, instead of just the ones with article_count=1. So finally this is the code that I managed to make it work with:
Publication.objects.annotate(article_count=Count('article')).filter(article_count=1).filter(article=a1).delete()
Definetly I'm not an expert, not sure if this is the best approach nor if it is really time expensive, so I'm open to suggestions. But as of now it's the only solution I found to perform this operation atomically.
You can remove the related objects using this query:
a1.publications.annotate(article_count=Count('article_set')).filter(article_count=1).delete()
annotate creates a temporary field for the queryset (alias field) which aggregates a number of related Article objects for each instance in the queryset of Publication objects, using Count function. Count is a built-in aggregation function in any SQL, which returns the number of rows from a query (a number of related instances in this case). Then, we filter out those results where article_count equals 1 and remove them.
I need to :
1. Create a single page location application
2. Display all the asset present in the selected location in a table
3. Provide a button from which user can navigate to WOTRACK to view all the workorder(s) created on selected location and its asset(s).
I am facing difficulty in the 3rd one. I have tried Launch in Context and it is working fine except am not able to pass sql query like 'location={location} and assetnum in ({asset.assetnum})'. I need to filter workorders with particular location and all its assets.
I tried to save all the assets in the location to a Non-persistant attribute and passing the values of the attribute in the Launch in context url, Its working as expected but to do so I have written a script on 'Initialize value' which is causing performance issues.
script goes like this:
from psdi.server import MXServer;
from psdi.mbo import MboConstants;
if app == "LOCATION1" :
if mbo.getString("LOCATION") is not None:
Locsite = mbo.getString("SITEID")
desc = mbo.getString("DESCRIPTION")
MaxuserSet = MXServer.getMXServer().getMboSet("MAXUSER", mbo.getUserInfo())
MaxuserSet.setWhere(" userid='"+user+"' ")
MaxuserSet.reset()
UserSite = MaxuserSet.getMbo(0).getString("DEFSITE")
if Locsite == UserSite:
AssetSet = mbo.getMboSet("ASSET")
AssetSet.setFlag(MboConstants.DISCARDABLE, True);
if not AssetSet.isEmpty():
AssetList = ""
AssetMbo = AssetSet.moveFirst()
while AssetMbo is not None:
AssetList = AssetList + str(AssetMbo.getString("ASSETNUM")) + "%2C"
AssetMbo = AssetSet.moveNext()
mbo.setValue("non-persitant",str(AssetList),11L)
and in the LIC url i have given : 'http://xx.x.x.xx/maximo/ui/?event=loadapp&value=wotrack&tabid=List&additionalevent=useqbe&additionaleventvalue=location={LOCATION}|assetnum={non-persistant}'
Is there any other feasible solution to the requirement?
Thanks in Advance
Launch In Context is better used for sending the user to an outside-of-Maximo application and passing along some data from inside-Maximo to provide context in that external app.
What you are doing sounds like a good place to use a workflow process with an Interaction node. The developer tells the Interaction node which app to take the user to and which Relationship to use to find the data the user should work with there.
Why don't you add a table control inside the table details (expanded table row) and show a list of the work orders there. From the WONUM in that table, you could have an app link to take them to WOTRACK, if they want more details about a particular work order. No customization (automation scripting) needed. No workflow needed. Nice and simple.
I have created a non-persistent attribute in my WoActivity table named VDS_COMPLETE. it is a bool that get changed by a checkbox in one of my application.
I am trying to make a automatisation script in Python to change the status of every task a work order that have been check when I save the WorkOrder.
I don't know why it isn't working but I'm pretty sure I'm close to the answer...
Do you have an idea why it isn't working? I know that I have code in comments, I have done a few experimentations...
from psdi.mbo import MboConstants
from psdi.server import MXServer
mxServer = MXServer.getMXServer()
userInfo = mxServer.getUserInfo(user)
mboSet = mxServer.getMboSet("WORKORDER")
#where1 = "wonum = :wonum"
#mboSet .setWhere(where1)
#mboSet.reset()
workorderSet = mboSet.getMbo(0).getMboSet("WOACTIVITY", "STATUS NOT IN ('FERME' , 'ANNULE' , 'COMPLETE' , 'ATTDOC')")
#where2 = "STATUS NOT IN ('FERME' , 'ANNULE' , 'COMPLETE' , 'ATTDOC')"
#workorderSet.setWhere(where2)
if workorderSet.count() > 0:
for x in range(0,workorderSet.count()):
if workorderSet.getString("VDS_COMPLETE") == 1:
workorder = workorderSet.getMbo(x)
workorder.changeStatus("COMPLETE",MXServer.getMXServer().getDate(), u"Script d'automatisation", MboConstants.NOACCESSCHECK)
workorderSet.save()
workorderSet.close()
It looks like your two biggest mistakes here are 1. trying to get your boolean field (VDS_COMPLETE) off the set (meaning off of the collection of records, like the whole table) instead of off of the MBO (meaning an actual record, one entry in the table) and 2. getting your set of data fresh from the database (via that MXServer call) which means using the previously saved data instead of getting your data set from the screen where the pending changes have actually been made (and remember that non-persistent fields do not get saved to the database).
There are some other problems with this script too, like your use of "count()" in your for loop (or even more than once at all) which is an expensive operation, and the way you are currently (though this may be a result of your debugging) not filtering the work order set before grabbing the first work order (meaning you get a random work order from the table) and then doing a dynamic relationship off of that record (instead of using a normal relationship or skipping the relationship altogether and using just a "where" clause), even though that relationship likely already exists.
Here is a Stack Overflow describing in more detail about relationships and "where" clauses in Maximo: Describe relationship in maximo 7.5
This question also has some more information about getting data from the screen versus new from the database: Adding a new row to another table using java in Maximo
I'm just starting out with Neo4j and I've been trying to send over simple relationships using Postman. I'm not having any issues sending the Nodes but the second I try to create a relationship, it creates two arbitrary grey nodes and builds the relationships. However, when I send a command like this:
CREATE (a:Person { name:'Tom Hanks', born:1956 })
-[r:ACTED_IN { roles: ['Forrest']}]->
(m:Movie { title:'Forrest Gump',released:1994 })
It properly displays the nodes and the relationship between them. See image below for more clarity.
This seems a bit odd as I would assume you'd be able to easily add nodes or create relationships at any point rather than when the Node's are being created.
Any feedback would be greatly appreciated.
Yes, you can create Relationship after the node is created using Match clause.
For e.g.
MATCH (node1:node),(node2:node)
WHERE node1.val=20 AND node2.val=21
CREATE (node1)-[r:Rel]->(node2)
RETURN r
I have been exclusively using cypher queries of this client for Neo4j because there is no out of the box way of doing many things. One of those id to get nodes. There is no way to retrieve them without knowing their id, which is very low level. Any idea on how to run a
$client->findOne('property','value');
?
It should be straightforward but it isn't from the documentation.
Make Indexes on the properties you want to search, from a newly created $personNode
$personIndex = new \Everyman\Neo4j\NodeIndex($client, 'person');
$personIndex->add($personNode, 'name', $personNode->name);
Then later to search, the new PHP object $personIndex will reference the same, populated index as above.
$personIndex = new \Everyman\Neo4j\NodeIndex($client, 'person');
$match = $personIndex->findOne('name', 'edoceo');