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  • Difference in Django object creation call

    - by PhilGo20
    I'd like to know if there's a difference between the following two calls to create an object in Django Animal.objects.create(name="cat", sound="meow") and Animal(name="cat", sound="meow") I see both in test cases and I want to make sure I am not missing something. thanks

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  • Get object from arraycollection

    - by Nll
    I have a problem about to get an object from arraycollection of objects with Id,so I do : protected $_rootObject; public function __construct(myClasse $rootObject) { $this->_rootObject= $rootObject; } public function getObjectById($id) { $value = null; foreach($this->_rootObject as $root) { if ($id == $root->getId()) { $value = $root; break; } } return $value; } Then the function return "NULL" so it's dosn't work...

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  • Getting the Assembly Qualified Name of a class in Visual Studio

    - by Alex Marshall
    Hello, I'm writing a customized reflective library for some specialized custom domain logic, and that library is going to use XML configuration files that will dynamically resolve System.Type objects at runtime. However, when writing the XML configuration files, it's a bit of a pain to write the types because they need to be fully qualified assembly names for Type.GetType() to resolve them. Is there a way to find out the AssemblyQualifiedName of an object in Visual Studio without resorting to writing a program to print them out to a file or standard out or anything like that ?

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  • How to limit manytomanyfields on a model ?

    - by Tom
    I would like to check that I get not more than 3 relations set on a manytomanyfield. I tried on the clean method to do this : if self.tags.count()>3: raise ValidationError(_(u'You cannot add more than 3 tags')) But self.tags returns not the current updates... only saved objects. Do you have an idea to access to them ? Thanks

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  • mapping Field with variable type using Hibernate Annotaion

    - by Zahra
    Hi. how can I have a field with variable type in my class? I use hibernate annotation for mapping to DB. I tried to use java.io.Serializable as field's type, but it mapped to database as a 01 amount which is true if I get it's object and cast it to it's true type. but I need to run a query on this objects that needs true amount of field.(right now I can't compare an integer field with a number) Does anyone have any idea how can I do this? Thanks in advance.

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  • Issues accessing an object's array values - returns null or 0s

    - by PhatNinja
    The function below should return an array of objects with this structure: TopicFrequency = { name: "Chemistry", //This is dependent on topic data: [1,2,3,4,5,6,7,8,9,10,11,12] //This would be real data }; so when I do this: myData = this.getChartData("line"); it should return two objects: {name : "Chemistry", data : [1,2,3,4,51,12,0,0, 2,1,41, 31]} {name : "Math", data : [0,0,41,4,51,12,0,0, 2,1,41, 90]} so when I do console.log(myData); it's perfect, returns exactly this. However when I do console.log(myData[0].data) it returns all 0s, not the values. I'm not sure what this issues is known as, and my question is simple what is this problem known as? Here is the full function. Somethings were hardcoded and other variables (notable server and queryContent) removed. Those parts worked fine, it is only when manipulated/retreiving the returned array's values that I run into problems. Note this is async. so not sure if that is also part of the problem. getChartData: function (chartType) { var TopicsFrequencyArray = new Array(); timePairs = this.newIntervalSet("Month"); topicList = new Array("Chemistry", "Math");//Hard coded for now var queryCopy = { //sensitive information }; for (i = 0; i < topicList.length; i++) { var TopicFrequency = { name: null, data: this.newFilledArray(12, 0) }; j = 0; TopicFrequency.name = topicList[i]; while (j < timePairs.length) { queryCopy.filter = TopicFrequency.name; //additional queryCopy parameter changes made here var request = esri.request({ url: server, content: queryCopy, handleAs: "json", load: sucess, error: fail }); j = j + 1; function sucess(response, io) { var topicCountData = 0; query = esri.urlToObject(io.url); var dateString = query.query.fromDate.replace("%", " "); dateString = dateString.replace(/-/g, "/"); dateString = dateString.split("."); date = new Date(dateString[0]); dojo.forEach(response.features, function (feature) { if (feature.properties.count > 0) { topicCountData = feature.properties.count; } TopicFrequency.data[date.getMonth()] = topicCountData; }); } function fail(error) { j = j + 1; alert("There was an unspecified error with this request"); console.log(error); } } TopicsFrequencyArray.push(TopicFrequency); } },

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  • How to explictely obtain post data in Spring MVC?

    - by predhme
    Is there a way to obtain the post data itself? I know spring handles binding post data to java objects. But if I had two fields that I want to process manually, how do I obtain that data? Assuming I had two fields in my form <input type="text" name="value1" id="value1"/> <input type="text" name="value2" id="value2"/> How would I go about retrieving those values in my controller?

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  • sequence generators are getting ignored

    - by luvfort
    I'm getting the following error while saving a object. However similar configuration is working for other model objects in my projects. Any help would be greatly appreciated. @Entity @Table(name = "ENROLLMENT_GROUP_MEMBERSHIPS", schema = "LEAD_ROUTING") public class EnrollmentGroupMembership implements Serializable, Comparable,Auditable { @javax.persistence.SequenceGenerator(name = "enrollmentGroupMemID", sequenceName = "S_ENROLLMENT_GROUP_MEMBERSHIPS") @Id @GeneratedValue(strategy = GenerationType.AUTO, generator = "enrollmentGroupMemID") @Column(name = "ID") private Long id; @ManyToOne() @JoinColumn(name = "TIER_WEIGHT_OID", referencedColumnName = "OID", updatable = false, insertable = false) private TierWeight tierWeight; public EnrollmentGroupMembership() { } } Code: @Entity @Table(name = "TIER_WEIGHT", schema = "LEAD_ROUTING") public class TierWeight implements Serializable, Auditable { @SequenceGenerator(name = "tierSequence",sequenceName = "S_TIER_WEIGHT") @Column(name = "OID") @Id @GeneratedValue(strategy = GenerationType.AUTO, generator = "tierSequence") private Long id; @OneToMany @JoinColumn(name = "TIER_WEIGHT_OID", referencedColumnName = "OID") private Set<EnrollmentGroupMembership> memberships; public TierWeight() { } } The logic layer's code is @Override public void createTier(String tierName, float weight) { TierWeight tier = new TierWeight(); tier.setWeight(weight); tier.setTier(tierName); tierWeightDAO.create(tier); } Similar Many-one configuration is working through out the project. I don't know why this one instance is failing. Any help would be greatly appreciated. The following is the error that I'm getting Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): edu.apollogrp.d2ec.model.TierWeight at org.hibernate.id.Assigned.generate(Assigned.java:3 3) at org.hibernate.event.def.AbstractSaveEventListener. saveWithGeneratedId(AbstractSaveEventListener.java :99) The log file is telling that the sequence generator tierSequence is not getting created. However other sequence generators are getting created. 2010-06-03 11:24:51,834 DEBUG [org.hibernate.cfg.AnnotationBinder:] Processing annotations of edu.apollogrp.d2ec.model.TierWeight.dateCreated 2010-06-03 11:24:51,834 DEBUG [org.hibernate.cfg.AnnotationBinder:] Processing annotations of edu.apollogrp.d2ec.model.TierWeight.dateCreated 2010-06-03 11:24:51,834 DEBUG [org.hibernate.cfg.Ejb3Column:] Binding column DATE_CREATED unique false ....................................... ....................................... 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.AnnotationBinder:] Processing annotations of edu.apollogrp.d2ec.model.CounselorAvailability.id 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.Ejb3Column:] Binding column OID unique false 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.Ejb3Column:] Binding column OID unique false 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.AnnotationBinder:] id is an id 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.AnnotationBinder:] id is an id 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.AnnotationBinder:] Add sequence generator with name: counselorAvailabilityID 2010-06-03 11:24:51,756 DEBUG [org.hibernate.cfg.AnnotationBinder:] Add sequence generator with name: counselorAvailabilityID While debugging, I see that the org.hibernate.impl.SessionFactoryImpl is returning the "Assigned" identifierGenerator. This is horrible. I've specified the identifierGenerator as "Auto". Please see the above code. As a sidenote, I was trying to debug and seeing how the objects are getting retrieved from the database. Looks like the enrollmentgroupmembership records have the tierweight value populated. However if I look at the tierweight object, it doesn't have the enrollmentgroupmembership records. I'm puzzled. I think these two problems must be related. Maddy.

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  • Python's JSON module doesn't use __get__?

    - by Matt
    When I serialize a list of objects with a custom __get__ method, __get__ is not called and the raw (unprocessed by custom __get__) value from __set__ is used. How does Python's json module iterate over an item? Note: if I iterate over the list before serializing, the correct value returned by __get__ is used.

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  • Where to wire up events?

    - by Jeffrey Cameron
    I'm using Ninject (1.5 ... soon to be 2) and I'm curious how other people use Ninject or other IoC containers to help wire up events to objects? It seems to me in my code that I'm doing it herky-jerky all over the place and would love some advice on how to clean it up a bit.

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  • f# interactive System.OutOfMemoryException

    - by user343550
    f# interactive throws System.OutOfMemoryException when loading large objects into memory. Exception is thrown at approximately 1.3 gigs. Data set is 2.2 gigs, and loads fine in debugger mode. Using VS2008 with April 2010 CTP This is mostly a java library that is being used via ikvmc, but if that were an issue, it shouldn't be running in the debugger either.

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  • Multi-threaded Pooled Allocators

    - by Darren Engwirda
    I'm having some issues using pooled memory allocators for std::list objects in a multi-threaded application. The part of the code I'm concerned with runs each thread function in isolation (i.e. there is no communication or synchronization between threads) and therefore I'd like to setup separate memory pools for each thread, where each pool is not thread-safe (and hence fast). I've tried using a shared thread-safe singleton memory pool and found the performance to be poor, as expected. This is a heavily simplified version of the type of thing I'm trying to do. A lot has been included in a pseudo-code kind of way, sorry if it's confusing. /* The thread functor - one instance of MAKE_QUADTREE created for each thread */ class make_quadtree { private: /* A non-thread-safe memory pool for int linked list items, let's say that it's * something along the lines of BOOST::OBJECT_POOL */ pooled_allocator<int> item_pool; /* The problem! - a local class that would be constructed within each std::list as the * allocator but really just delegates to ITEM_POOL */ class local_alloc { public : //!! I understand that I can't access ITEM_POOL from within a nested class like //!! this, that's really my question - can I get something along these lines to //!! work?? pointer allocate (size_t n) { return ( item_pool.allocate(n) ); } }; public : make_quadtree (): item_pool() // only construct 1 instance of ITEM_POOL per // MAKE_QUADTREE object { /* The kind of data structures - vectors of linked lists * The idea is that all of the linked lists should share a local pooled allocator */ std::vector<std::list<int, local_alloc>> lists; /* The actual operations - too complicated to show, but in general: * * - The vector LISTS is grown as a quadtree is built, it's size is the number of * quadtree "boxes" * * - Each element of LISTS (each linked list) represents the ID's of items * contained within each quadtree box (say they're xy points), as the quadtree * is grown a lot of ID pop/push-ing between lists occurs, hence the memory pool * is important for performance */ } }; So really my problem is that I'd like to have one memory pool instance per thread functor instance, but within each thread functor share the pool between multiple std::list objects.

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  • clarification on the concept of "web service"

    - by udit
    Im a little confused on the varying definitions and implementations of web services available as implementations. Need some clarification please. Ones I have used till now: If a vendor gives me a specific format of XML that I can send populated with data to request and I make a simple HTTP POST over the internet passing in the XML String as the payload, is this a web service call ? If so, is there a specific name to it, this kind of web service ? Because obviously, it does not use anything like Axis, WSDL or SOAP to establish this connection. A variant of this is If the vendor gives me an XSD, I use JAXB to make a java class out of it and pass in the serialized version of the object, which eventually works out to be the same as option 1. RESTful web service: Vendor gives me a URL like http://restfulservice/products and I can make HTTP Requests to the URL and depending on what HTTP verb I use, the appropropriate action is called and the response sent over the wire. Ones I have only read about\ have a vague idea about SOAP. How does this work?.. Ive read the W3Schools tutorial and I undertsand that there is a very specific form of XML that is standardized according to W3C standards that we use to pass the same kind of messages as we did in option 1. But how does this work in real life? Vendor sends me what? Do I generate classes? Do I serialize some objects and http post them over to an address? Or do the generated objects themselves have connection methods that will do them for me? What about WSDL? When does a vendor send me WSDL and what do I do with it ? I guess I can generate classes from it. If yes, then what do I do with the generated classes ? When do I need that axis jar to generate classes from something that the vendor sends ? As you can see, I have some clear and other mostly vague ideas about the different kinds of web services available. would help if someone ould clarify and\or point to more real-world resources. I've looked a little bit into Java Web Services on the internet and the numerous four letter acronyms that get thrown at me make me dizzy. Thanks

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  • Can I rename Main.mxml?

    - by Randyaa
    We have several Flash objects included in our project. We call each one a specific type of widget... For readability/debugging purposes I'd like to rename Main.mxml to something else. At first this seemed easy, as it would be just a setting in our maven configuration (we're using flex mojos to build our swf). However; changing the sourceFile from Main.mxml to MyWidget.mxml doesn't seem to do it. Any thoughts?

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  • Is there something like LINQ for Java?

    - by Kb
    Started to learn LINQ with C#. Especially LINQ to Objects and LINQ to XML. I really enjoy the power of LINQ. I learned that there is something called JLINQ a Jscript implementation. Also (as Catbert posted) Scala will have LINQ Do you know if LINQ or something similar will be a part of Java 7? Update: Interesting post from 2008 - http://stackoverflow.com/questions/346721/linq-for-java

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  • Rhino Mocks - Do we really need stubs?

    - by Marcelo Oliveira
    If it's possible to change mock behaviour in Rhino Mocks using mock.Stub().Return(), why do we need Stubs anyway? What do we lose by always using MockRepository.GenerateMock()? One big benefit of using Mocks instead of Stubs is that we will be able to reuse the same instance among all the tests keeping them cleaner and straightforward. The moq framework works in a similar way... we don't have different objects for mocks and stubs. (please, don't answer with a link to Fowler's "Mocks aren't stubs" article)

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  • Java. Best procedure to de-serialize a Java generic object?

    - by Jake
    What is the best procedure for storing and retrieving, using native Java serialization, generic objects like ArrayList<String>? Edit: To clarify. When I serialize an object of type ArrayList<String> I'd like to de-serialize to the same type of object. However, I know of no way to cast back to this generic object without causing warnings.

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  • The question regarding cerr cout and clog

    - by skydoor
    Can anybody explain the difference between cerr cout and clog and why does different objects are proposed? I know the differences are as below: 1) cout can redirected but cerr can't 2) clog can use buffer. I am confused about the point 2, I am grateful if anybody can elaborate it more.

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  • ASP.Net:Best way to run scheduled tasks

    - by Niels Bosma
    Today we have built an console application for running scheduled tasks for our ASP.NET website. But I think this appoach is a bit error prone and difficult to maintain. How do you execute you scheduled task (in an windows/IIS/ASP.NET env.) Update: Examples of tasks: Sending email from an emial-queue in the database Removing utdated objects from the database Retreiving stats from google adwords and fill a table in the database.

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  • Passing a DataTable into a Stored Procedure. Is there a better way?

    - by punkouter
    Can A datatable somehow be passed into SQL Server 2005 or 2008 ? I know the standard way seesm to be passing XML to a SP. And a datatable can easily be converted to XML somehow to do that. What about passing a .NET object into a SP ? Is that possible ? I remember hearing about SQL and CLR working together in 2008 somehow but I never understood.. Maybe that means you can refer to .NET objects within a Stored Procedure ?

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  • postgresql drop table

    - by Russell
    I have two tables (tbl and tbl_new) that both use the same sequence (tbl_id_seq). I'd like to drop one of those tables. On tbl, I've removed the modifier "not null default nextval('tbl_id_seq'::regclass)" but that modifier remains on tbl_new. I'm getting the following error: ERROR: cannot drop table tbl because other objects depend on it DETAIL: default for table tbl_new column id depends on sequence tbl_id_seq After reviewing http://www.postgresql.org/docs/9.1/static/sql-droptable.html It looks like there is only CASCADE and RESTRICT as options.

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