I've installed titan-0.5.0-hadoop2 with hbase and elasticsearch support
I've loaded the graph with
g = TitanFactory.open('conf/titan-hbase-es.properties')
==>titangraph[hbase:[127.0.0.1]]
and a then I loaded the test application
GraphOfTheGodsFactory.load(g)
Now when I'm trying to create a new index key with:
g.makeKey('userId').dataType(String.class).indexed(Vertex.class).unique().make()
and I got this error:
No signature of method: groovy.lang.MissingMethodException.makeKey() is applicable for argument types: () values: []
Possible solutions: every(), any()
Display stack trace? [yN]
Can someone help me with this ?
when I want to see the indexed keys I see this
g.getIndexedKeys(Vertex.class)
==>reason
==>age
==>name
==>place
I'm not completely following what you are trying to do. It appears that you loaded Graph of the Gods to g and then you want to add userId as a new property to the schema. If that's right, then i think your syntax is wrong, given the Titan 0.5 API. The method for managing the schema is very different from previous versions. Changes to the schema are performed through the ManagementSystem interface which you can get an instance of through:
mgmt = g.getManagementSystem()
The syntax for adding a property then looks something like:
birthDate = mgmt.makePropertyKey('birthDate').dataType(Long.class).cardinality(Cardinality.SINGLE).make()
mgmt.commit()
Note that g.getIndexKeys(Class) is not the appropriate way to get schema information either. You should use the ManagementSystem for that too.
Please see the documentation here for more information.
Related
I have a collection of Person, stored in a legacy mongodb server (2.4) and accessed with the mongoid gem via the ruby mongodb driver.
If I perform a
Person.where(email: 'some.existing.email#server.tld').first
I get a result (let's assume I store the id in a variable called "the_very_same_id_obtained_above")
If I perform a
Person.find(the_very_same_id_obtained_above)
I got a
Mongoid::Errors::DocumentNotFound
exception
If I use the javascript syntax to perform the query, the result is found
Person.where("this._id == #{the_very_same_id_obtained_above}").first # this works!
I'm currently trying to migrate the data to a newever version. Currently mongodbrestore-ing on amazon documentdb to make tests (mongodb 3.6 compatible) and the issue remains.
One thing I noticed is that those object ids are peculiar:
5ce24b1169902e72c9739ff6 this works anyway
59de48f53137ec054b000004 this requires the trick
The small number of zeroes toward the end of the id seems to be highly correlated with the problem (I have no idea of the reason).
That's the default:
# Raise an error when performing a #find and the document is not found.
# (default: true)
raise_not_found_error: true
Source: https://docs.mongodb.com/mongoid/current/tutorials/mongoid-configuration/#anatomy-of-a-mongoid-config
If this doesn't answer your question, it's very likely the find method is overridden somewhere in your code!
I'm trying to export a sparkR model as PMML.
The first approach was using the pmml library:
library(pmml)
sparkR.session()
data(iris)
df <- createDataFrame(iris)
model <- spark.kmeans(df, Sepal_Length ~ Sepal_Width, k = 4, initMode = "random")
model_pmml <- pmml(model)
The error:
Error in UseMethod("pmml"): no applicable method for 'pmml' applied to an object of class "KMeansModel"
Traceback:
1. pmml(model)
I also investigated if the toPMML method available on scala models could be used from SparkR. I've found a question that suggests it may be possible with Sparklyr, but not with SparkR.
Any ideas?
I have come to the conclusion that exporting a spark R model is not supported. I have added a feature request for this: https://issues.apache.org/jira/browse/SPARK-21430. Please vote on the jira ticket if you are also looking for this functionality.
I am trying to run a query using com.parse:parse-android:1.13.0 version of the parse android SDK. I am creating a query on the local storage and using ParseQuery$whereMatchesQuery() method to match a column storing pointer to another class in my database. The code that I have is the following:
ParseQuery<PracticeSessionDetails> query = ParseQuery.getQuery(PracticeSessionDetails.class);
query.fromLocalDatastore();
query.ignoreACLs();
query.whereEqualTo("user", ParseUser.getCurrentUser());
ParseQuery courseQuery = new ParseQuery("Course");
courseQuery.whereEqualTo("objectId",courseId);
query.whereMatchesQuery("course", courseQuery);
When I run the query using query.getFirst(), I do not get anything retrieved from the local storage. I have already checked running the courseQuery separately and it fetches me Course object that I need. Is this a known issue? I proceeded with this way by getting help from this post.
I think you are mixing query while storing pointer to another class in your database. Use following code to resolve your problem:
ParseQuery<PracticeSessionDetails> query = ParseQuery.getQuery(PracticeSessionDetails.class);
query.fromLocalDatastore();
query.ignoreACLs();
query.whereEqualTo("user", ParseUser.getCurrentUser());
ParseQuery<ParseObject> courseQuery = ParseQuery.getQuery("Course");
courseQuery.whereMatchesQuery("course", query);
Problem:
Attempting to use the JYTHON command below and I cannot retrieve the id of my active specification defined at a node-server level in Websphere. I believe its a syntax issue but I'm not sure what.
Code:
AdminConfig.getid('/Cell:mycell/Node:mynode/Server:myserver/J2CActivationSpec:myActiveSpecName/')
Problem Notes:
I do not get a invalid object error so I believe I have the syntax right but it just cannot find the resource even though it exists.
I am using the AdminConfig.getid() as a way to check if the resource already exists in order to do a modify or a create.
If I use the following code: AdminConfig.getid('/J2CActivationSpec:myActiveSpecName/') it will find it but not if I use a more specific path listed above.
Reference Material:
IBM Documentation
Containment paths are always a little tricky. In my (limited) experience, even if you can trace the path by AdminConfig.parents, you may not always be able to use getid.
Are you restricted to using getid? If not, here are some alternatives that will get you an ActivationSpec at the /Cell/Node/Server level:
Querying using AdminConfig.list
This approach will list the Activation Specifications at the specified scope (in our case, the server), and grab the one that has it's name attribute equal to 'myActiveSpecName'.
server = AdminConfig.getid('/Cell:mycell/Node:mynode/Server:myserver')
activationSpec = ''
for as in AdminConfig.list('J2CActivationSpec', server).splitlines():
if AdminConfig.showAttribute(as, 'name') == 'myActiveSpecName'
activationSpec = as
print 'found it :)'
Using Wildcards
This approah uses AdminConfig.list as well, but with a pattern to narrow down your list. If you know your activation spec's configuration begins with myActiveSpecName, then you can do the following:
activationSpec = AdminConfig.list('J2CActivationSpec', 'myActiveSpecName*')
Does anyone have the faintest idea what this error means please and how to resolve it? All my research is drawing a blank, I can see how to set it on MSDN but it doesn't explain it in a way that explains to me what the issue is. If I remove some of my LINQ queries to set viewbag items then it seems to resolve it but the moment I set new ones and pass them into my view to generate a mail for MVCMailer it comes back. Not sure if its a viewbag issue or simply that I am calling too many linq queries to generate them to pass to the view.
I am very stuck (again)..........
Cheers,
Steve.
DbLimitExpression requires a collection argument.
Parameter name: argument
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: DbLimitExpression requires a collection argument.
Parameter name: argument
An example of the code is:
var VBSalutation = from A in context.Salutations
where A.SalutationId == policytransaction.SalutationId
select A.SalutationName;
ViewBag.Salutation = VBSalutation.FirstOrDefault();
This is repeated for various parameters and then passed to the view.
Well, I faced a similar problem and solved it. Problem was in WHERE clause: data type of left side equal operator (=) sign was not matching with data type of right side. So in your scenario:
where A.SalutationId == policytransaction.SalutationId
SalutationID of A might be an INT and SalutationId of policytransaction might be a string (This is how it was in my case).
I solved it by assigning policytransaction.SalutationId to an Int variable and using it:
int myIntVariable = Convert.ToInt16(policytransaction.SalutationId);
...//some code here
where A.SalutationId == myIntVariable;
Please also note that you cannot directly cast your variables directly in Linq else you'll get an error "LINQ to Entities does not recognize the method". You'll have to use a temp variable and then apply the where clause.
Try ViewBag.Salutation = VBSalutation.SingleOrDefault();