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• NHibernate ManyToMany Relationship Cascading AllDeleteOrphan StackOverflowException

  - by Chris

  I have two objects that have a ManyToMany relationship with one another through a mapping table. Though, when I try to save it, I get a stack overflow exception. The following is the code for the mappings: //EventMapping.cs HasManyToMany(x => x.Performers).Table("EventPerformer").Inverse().Cascade.AllDeleteOrphan().LazyLoad().ParentKeyColumn("EventId").ChildKeyColumn("PerformerId"); //PerformerMapping.cs HasManyToMany<Event>(x => x.Events).Table("EventPerformer").Inverse().Cascade.AllDeleteOrphan().LazyLoad().ParentKeyColumn("PerformerId").ChildKeyColumn("EventId"); When I change the performermapping.cs to Cascade.None() I get rid of the exception but then my Event Object doesn't have the performer I associate with it. //In a unit test, paraphrased event.Performers.Add(performer); //Event eventRepository.Save<Event>(event); eventResult = eventRepository.GetById<Event>(event.id); //Event eventResult.Performers[0]; //is null, should have performer in it How should I be writing this properly? Thanks

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• ORA-01722: invalid number

  - by Lluis Martinez

  I'm getting the infamous invalid number Oracle error. Hibernate is issuing an INSERT with a lot of columns, I want to know just the name of the column giving the problem. Is it possible? I hate Oracle messages, in 15 years they haven't improved a bit (the reason why is beyond my imagination). FYI the insert is this: insert into GEM_INVOICE_HEADER (ENDORSEE_ACCOUNT_ID, INVOICE_CODE, APPROVAL_ORGAN, APROVAL_DATE, APROVAL_REFERENCE, BALANCE_BASE_AMOUNT, BALANCE_DEDUCT_AMOUNT, BALANCE_TOTAL_AMOUNT, BALANCE_VAT_AMOUNT, BALANCE_VAT_DED_AMOUNT, BALANCE_VAT_NOT_DED_AMOUNT, DESCRIPTION, SUPPLIER_INVOICE_NUMBER, INVOICE_DATE, RECEIPT_DATE, MEMO, VAT_INTRACOM, INVOICE_BASE_AMOUNT, INVOICE_VAT_AMOUNT, INVOICE_VAT_DED_AMOUNT, INVOICE_VAT_NOT_DED_AMOUNT, INVOICE_DEDUCT_AMOUNT, INVOICE_TOTAL_AMOUNT, VAT_EXEMPT, RECTIFICATION_SIGN, REASON, LOT, FILE_ID, RETAINED, INSTITUTION_ID, PERIOD_CODE, IS_RECTIFIED, DEFAULT_OFFBUDGET_ACCOUNT, OFFBUDGET_DOC_ID, PHASE_OF_ACCOUNTING, ACCOUNTED_OFF_BUDGET, CANCEL_DOC_ID, BUDGET_TYPE, INVOICE_TYPE, SOURCE_ID, STATE_ID, MANAGER_UNIT_ID, DOCUMENT_TYPE_CODE, ACCOUNTED_DOC_ID, ACCOUNTING_LIST, ENDORSEE_ID, PAYMASTER_ID, SUPPLIER_ID, SUPPLIER_ACCOUNT_ID, PAY_JUSTIFY_ID, PETTY_CASH_ID, DBOID) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)

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• With VIM, use both snipMate and pydiction together (share the <tab> key?)

  - by thornomad

  I am trying to use snipMate and pydiction in vim together - however, both use the <tab> key to perform their genius-auto-completion-snippet-rendering-goodness-that-I-so-desire. When pydiction is installed, snipMate stops working. I assume its because they can't both own the <tab> key. How can I get them to work together? I wouldn't mind mapping one of them to a different key, but I am not really sure how to do this ... (maybe pydiction to the <ctrl-n> key so it mimics vim's autocomplete?). Here is the relevant .vimrc: filetype indent plugin on autocmd FileType python set ft=python.django autocmd FileType html set ft=html.django_template let g:pydiction_location = '~/.vim/ftplugin/pydiction-1.2/complete-dict'

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• Problems with ASP.NET State Service version; state service is 1.1, website is 3.5

  - by Mick Byrne

  Hi there, I have a ASP.NET 3.5 website running on Windows Server 2003 and I'm using the ASP.NET State Service to manage sessions. It will appear to be working then I regularly get an error saying my code needs to have version 2.0 of the State Service running to work (I think that's what it said, I've temporarily switched back to storing sessions InProc). Refresh the page and the error goes away (for a bit, it's bound to come back). So I looked at the properties of the ASP.NET State Service in the Services interface and it's mapping to a .exe in the 1.1 framework folder: C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_state.exe There's a corresponding version in the 2.0 framework folder, but I don't know how to add it as a new service. I'm also not sure that adding the 2.0 version (and stopping and/or removing the 1.1 version) will solve the problem. Thanks in advance for any help anyone can provide. Mick

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• Why servlet halt a moment in concurrent request.

  - by Hlex

  I use Axis for webservice service. when more than 8 concurrent , there are some request halt randomly for about 30 seconds. I debug by log in every line and found from my code: public class foo{ void bar(){ a(); log.debug('exit from a'); } void a(){ log.debug('exit a'); } the time between "exit a" and "exit from a" are delay about 30 second. This is no reason. I try to increase web container thread pool , heap but didn't help ============== Enviroment websphere 6.1 Spring 2.5 , Hibernate 3 ,Axis 1.6.5 Min heap to 768 Max heap to 1024 Thread pool defult max to 300 Thread pool web container max to 500 ===============

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• Computed properties in NHibernate

  - by Liron Levi

  I'm having a problem in mapping an existing data class member to the database.. I have a database table where one of the columns is a string type, but actually stores a comma separated list of numbers. My data class shows this field as a list of integers. The problem is that I couldn't find any hook in NHibernate that allows me to invoke the custom code that is required to replace the string field by the list and vice versa. To illustrate (simplified of course): The database table: CREATE TABLE dummy ( id serial, numlist text -- (can store values such as '1,2,3') ) The data class: class Dummy { public int Id; public List<int> NumbersList; } Can anyone help?

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• Is testability alone justification for dependency injection?

  - by fearofawhackplanet

  The advantages of DI, as far as I am aware, are: Reduced Dependencies More Reusable Code More Testable Code More Readable Code Say I have a repository, OrderRepository, which acts as a repository for an Order object generated through a Linq to Sql dbml. I can't make my orders repository generic as it performs mapping between the Linq Order entity and my own Order POCO domain class. Since the OrderRepository by necessity is dependent on a specific Linq to Sql DataContext, parameter passing of the DataContext can't really be said to make the code reuseable or reduce dependencies in any meaningful way. It also makes the code harder to read, as to instantiate the repository I now need to write new OrdersRepository(new MyLinqDataContext()) which additionally is contrary to the main purpose of the repository, that being to abstract/hide the existence of the DataContext from consuming code. So in general I think this would be a pretty horrible design, but it would give the benefit of facilitating unit testing. Is this enough justification? Or is there a third way? I'd be very interested in hearing opinions.

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• Use only some parts of Django?

  - by Hanno Fietz

  I like Django, but for a particular application I would like to use only parts of it, but I'm not familiar enough with how Django works on the inside, so maybe someone can point me into the right direction as to what I have to check out. Specifically, I want to use: The models and database abstraction The caching API, although I want to avoid database lookups by caching, not HTML generation, and since the caching framework in Django is intended for the latter, I'm not sure yet whether that's really appropriate. I would not use: Templating urlconfigs Or, more exactly, I'm neither using HTTP nor HTML. So basically, I have a different input / output chain than usual. Can this work? My personal killer feature in Django is the Object / database mapping that I can do with the models, so if there's another technology (doesn't have to be Python, I'm in the design phase and I'm pretty agnostic about languages and platforms) that gives me the same abilities, that would be great, too.

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• No persister for: <ClassName> issue with Fluent NHibernate

  - by Amit

  I have following code: //AutoMapConfig.cs using System; using FluentNHibernate.Automapping; namespace SimpleFNH.AutoMap { public class AutoMapConfig : DefaultAutomappingConfiguration { public override bool ShouldMap(Type type) { return type.Namespace == "Examples.FirstAutomappedProject.Entities"; } } } //CascadeConvention.cs using FluentNHibernate.Conventions; using FluentNHibernate.Conventions.Instances; namespace SimpleFNH.AutoMap { public class CascadeConvention : IReferenceConvention, IHasManyConvention, IHasManyToManyConvention { public void Apply(IManyToOneInstance instance) { instance.Cascade.All(); } public void Apply(IOneToManyCollectionInstance instance) { instance.Cascade.All(); } public void Apply(IManyToManyCollectionInstance instance) { instance.Cascade.All(); } } } //Item.cs namespace SimpleFNH.Entities { public class Item { public virtual long ID { get; set; } public virtual string ItemName { get; set; } public virtual string Description { get; set; } public virtual OrderItem OrderItem { get; set; } } } //OrderItem.cs namespace SimpleFNH.Entities { public class OrderItem { public virtual long ID { get; set; } public virtual int Quantity { get; set; } public virtual Item Item { get; set; } public virtual ProductOrder ProductOrder { get; set; } public virtual void AddItem(Item item) { item.OrderItem = this; } } } using System; using System.Collections.Generic; //ProductOrder.cs namespace SimpleFNH.Entities { public class ProductOrder { public virtual long ID { get; set; } public virtual DateTime OrderDate { get; set; } public virtual string CustomerName { get; set; } public virtual IList<OrderItem> OrderItems { get; set; } public ProductOrder() { OrderItems = new List<OrderItem>(); } public virtual void AddOrderItems(params OrderItem[] items) { foreach (var item in items) { OrderItems.Add(item); item.ProductOrder = this; } } } } //NHibernateRepo.cs using FluentNHibernate.Cfg; using FluentNHibernate.Cfg.Db; using NHibernate; using NHibernate.Criterion; using NHibernate.Tool.hbm2ddl; namespace SimpleFNH.Repository { public class NHibernateRepo { private static ISessionFactory _sessionFactory; private static ISessionFactory SessionFactory { get { if (_sessionFactory == null) InitializeSessionFactory(); return _sessionFactory; } } private static void InitializeSessionFactory() { _sessionFactory = Fluently.Configure().Database( MsSqlConfiguration.MsSql2008.ConnectionString( @"server=Amit-PC\SQLEXPRESS;database=SimpleFNH;Trusted_Connection=True;").ShowSql()). Mappings(m => m.FluentMappings.AddFromAssemblyOf<Order>()).ExposeConfiguration( cfg => new SchemaExport(cfg).Create(true, true)).BuildSessionFactory(); } public static ISession OpenSession() { return SessionFactory.OpenSession(); } } } //Program.cs using System; using System.Collections.Generic; using System.Linq; using SimpleFNH.Entities; using SimpleFNH.Repository; namespace SimpleFNH { class Program { static void Main(string[] args) { using (var session = NHibernateRepo.OpenSession()) { using (var transaction = session.BeginTransaction()) { var item1 = new Item { ItemName = "item 1", Description = "test 1" }; var item2 = new Item { ItemName = "item 2", Description = "test 2" }; var item3 = new Item { ItemName = "item 3", Description = "test 3" }; var orderItem1 = new OrderItem { Item = item1, Quantity = 2 }; var orderItem2 = new OrderItem { Item = item2, Quantity = 4 }; var orderItem3 = new OrderItem { Item = item3, Quantity = 5 }; var productOrder = new ProductOrder { CustomerName = "Amit", OrderDate = DateTime.Now, OrderItems = new List<OrderItem> { orderItem1, orderItem2, orderItem3 } }; productOrder.AddOrderItems(orderItem1, orderItem2, orderItem3); session.Save(productOrder); transaction.Commit(); } } using (var session = NHibernateRepo.OpenSession()) { // retreive all stores and display them using (session.BeginTransaction()) { var orders = session.CreateCriteria(typeof(ProductOrder)) .List<ProductOrder>(); foreach (var item in orders) { Console.WriteLine(item.OrderItems.First().Quantity); } } } } } } I tried many variations to get it working but i get an error saying No persister for: SimpleFNH.Entities.ProductOrder Can someone help me get it working? I wanted to create a simple program which will set a pattern for my bigger project but it is taking quite a lot of time than expected. It would be rally helpful if you can explain in simple terms on any template/pattern that i can use to get fluent nHibernate working. The above code uses auto mapping, which i tried after i tried with fluent mapping.

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• Grails searchable plugin

  - by Don

  Hi, In my Grails app, I'm using the Searchable plugin for searching/indexing. I want to write a Compass/Lucene query that involves multiple domain classes. Within that query when I want to refer to the id of a class, I can't simply use 'id' because all classes have an 'id' property. Currently, I work around this problem by adding the following property to a class Foo public Long getFooId() { return id } static transients = ['fooId'] Then when I want to refer to the id of Foo within a query I use 'fooId'. Is there a way I can provide an alias for a property in the searchable mapping rather than adding a property to the class?

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• Mapped Stored Procedures in EF 1

  - by michael.lukatchik

  All, I'm using mapped Stored Procedures in EF 1. I've completed the following steps: 1) I've created my INSERT, UPDATE, and DELETE queries in SQL Server. 2) I've built the EDMX and imported the INSERT, UPDATE, and DELETE sprocs as part of my model. 3) I've set up a Stored Procedure Mapping on a table inside of my EDMX file. The INSERT, UPDATE, and DELETE sprocs were mapped accordingly. Using this approach, I would expect to rebuild the application (and mine builds successfully) and then see the Stored Procedures as available function names via my EDMX object, such as: _entities.InsertComment(..), _entities.UpdateComment(..), and _entities.DeleteComment(..) Intellisense is not picking these names up and I can't figure out why. If I perform these same steps using EF4, the function names are automatically picked up by Intellisense after adding the Stored Procedure Mappings. Is this a bug in EF1? Is there something else I should be doing? Thanks in advance, Mike

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• how to manage vim plugin

  - by Haiyuan Zhang

  I want to know how do you manage your vim plugins. As it is, One of the biggest fun of using is that one can easily try many interesing new plugins, just download it and unzip it in under ~/.vim. But if you try too often and try too much, you might get trouble as confilct of key mapping , in compatitble script version, dpendency between different plugin ..... Then you want to remove some plugin ,kind of like rollback your vim to a sound condition. But, the rollback could be very painful . cus for some "giant" plugin, like perl-support ( it's great plugin, anyway), will consist of many vim scripts which spread in different dirctories. To remove single one giant plugin will be anoying, not too mention if you remvoe many plugin at one time. In a word , I'm looking for good practice for managing vim plugins.

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• Is there a production ready web application framework in Python?

  - by peperg

  I heard lots of good opinions about Python language. They say it's mature, expressive etc... Are there any production-ready web application frameworks in Python. By "production ready" I mean : supports objective-relational mapping with caching and declarative desciption (like JPA, Hibernate etc..) controls oriented user interface support - no HTML templates but something like JSF (RichFaces, Icefaces) or GWT, Vaadin, ZK component decomposition and dependency injection (like EJB or Spring) unit and integration testing good IDE support clustering, modularity etc (like Terracota, OSGi etc..) there are successful applications written in it by companies like IBM, Oracle etc (I mean real business applications not Twitter) could have commercial support Is it possible at all in Python world ? Or only choices are : use Python and write everything from the bottom (too expensice) stick to JEE buy .NET stack

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• IStatelessSession insert object with many-to-one

  - by Andrew Kalashnikov

  Hello guys. I've got common mapping <class name="NotSyncPrice, Portal.Core" table='Not_sync_price'> <id name="Id" unsaved-value="0"> <column name="id" not-null="true"/> <generator class="native"/> </id> <many-to-one name="City" class="Clients.Core.Domains.City, Clients.Core" column="city_id" cascade="none"></many-to-one> <!--<property name="City"> <column name="city_id"/> </property>--> I want to use IStatelessSession for batch insert. But when i set city object to NotSyncPrice object and call IStatelessSession I've got strange exception: NHibernate.Impl.StatelessSessionImpl.get_Timestamp() When its null or int all is ok. I try use real && proxy city object. But no result. What's wrong:( Please help

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• Restkit Serializing a Boolean from NSNumber

  - by angelokh

  One of managed objects has one attribute 'isMember' represented by NSNumber type. When serialize to Json post body by RestKit, it always give 0/1 instead of YES/NO or true/false. When mapping from json result to objects, RestKit is able to successfully turn YES/NO to NSNumber. What is the way to force serialize the boolean attribute to YES/NO or true/false? Serialize: 0 -> 0, 1 -> 1 Deserialize : YES/true -> 1, NO/false -> 0

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• Entity Framework: Data Centric vs. Object Centric

  - by Eric J.

  I'm having a look at Entity Framework and everything I'm reading takes a data centric approach to explaining EF. By that I mean that the fundamental relationships of the system are first defined in the database and objects are generated that reflect those relationships. Examples Quickstart (Entity Framework) Using Entity Framework entities as business objects? The EF documentation implies that it's not necessary to start from the database layer, e.g. Developers can work with a consistent application object model that can be mapped to various storage schemas When designing a new system (simplified version), I tend to first create a class model, then generate business objects from the model, code business layer stuff that can't be generated, and then worry about persistence (or rather work with a DBA and let him worry about the most efficient persistence strategy). That object centric approach is well supported by ORM technologies such as (n)Hibernate. Is there a reasonable path to an object centric approach with EF? Will I be swimming upstream going that route? Any good starting points?

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• Date format strings in .Net and Java

  - by mizipzor

  I have an application that runs on both C# .Net and Java. Two entirely separate but identical code bases. The problem Im having is formatting date and numbers. For example: A user running the .Net variant is inputting a date and a format string. The 26th of April 1986 is formatted 1986-04-26. The actual date, along with the format string, is serialized to an XML file. Later another user running the Java variant opens said XML file and looks at the date. I want them to look the same. Whats the best approach here? There doesnt seem to be a one-to-one mapping between Java and .Nets format strings. Should I limit the possible formats to a selection I know I can represent fully in both .Net and Java?

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• Unidirectional OneToMany in Doctrine 2

  - by darja

  I have two Doctrine entities looking like that: /** * @Entity * @Table(name = "Locales") */ class Locale { /** * @Id @Column(type="integer") * @GeneratedValue(strategy="IDENTITY") */ private $id; /** @Column(length=2, name="Name", type="string") */ private $code; } /** * @Entity * @Table(name = "localized") */ class LocalizedStrings { /** * @Id @Column(type="integer") * @GeneratedValue(strategy="IDENTITY") */ private $id; /** @Column(name="Locale", type="integer") */ private $locale; /** @Column(name="SomeText", type="string", length=300) */ private $someText; } I'd like to create reference between these entities. LocalizedStrings needs reference to Locale but Locale doesn't need reference to LocalizedStrings. How to write such mapping via Doctrine 2?

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• XSD data set with Oracle database

  - by Ed Woodcock

  Hi folks, I'm having a major issue with an XSD dataset mapping thingy that I'm using within my current project. We are using XSDs for some data abstraction (it's quicker and debatably more maintainable that using Parameterised SQL or a StoredProc), and on my machine (running in the VS development environment) thy're working fine. However, on the Pre-production server we use for our testing, the XSDs are not working correctly: some method calls will fail with the following error: System.ArgumentException: Value does not fall within the expected range. at Oracle.DataAccess.Client.OracleParameter.set_DbType(DbType value) Has anyone ever encountered this issue before? The methods being called are simple select statements using 1-3 parameters, and as I said before they work fine on my machine.

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• Xml files stop being served by IIS6 after allowing .net to process the .xml extension

  - by Brian Surowiec

  I added a route into my site to allow for a sitemap and everything worked fine in IIS7 but once I deployed the route stopped working. Since the live server is running IIS6 I needed to put a new mapping in for .xml to be processed by .net and then it started to work. My issue though is on every other xml file on the site now. I keep getting a 404 error when trying to view xml files, but the sitemap.xml route works. Is this a routing issue or an IIS setup issue? Here are my routes if it will help routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( "Gallery-Group-View", "Projects/{groupId}", new { controller = "Gallery", action = "GalleryList", groupId = "" }); routes.MapRoute( "Gallery-List-View", "Projects/{groupId}/{galleryId}", new { controller = "Gallery", action = "GalleryView", groupId = "", galleryId = "" }); routes.MapRoute( "Sitemap", "Sitemap.xml", new { controller = "XML", action = "Sitemap" } ); routes.MapRoute( "Default", "{controller}/{action}/{id}", new { controller = "Home", action = "Index", id = "" } );

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• I would like to build a Java Web Application. What's the quickest start?

  - by Vish

  I am a reasonably competent programmer, with about 11 years experience. I particularly like Ruby/Rails and ActionScript. And Java is not too hard. I'd like to develop a web application in Java in order to leverage things like BlazeDS and learn some new tricks with regard to JBoss and the whole Java App thing. But I'm having trouble - and confused - looking for a smooth start. I don't want to use Grails, thanks, I want to use Pure Java, with whatever Framework you can think of. Spring, Hibernate, lalala, it's cool. Where do I start?

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• Unidirectional One-to-Many Associations in Entity Framework 4?

  - by Eric J.

  Does EF 4 support unidirectional one-to-many associations, as in: public class Parent { public int Id { get; set; } public string Something { get; set; } public List<Child> AllMyChildren { get; set; } } public class Child { public int Id { get; set; } public string Anotherthing { get; set; } // I don't want a back-reference to the Parent! // public int ParentId { get; set; } } When I try to compile my project with an association between Parent and Child where End2 Navigation is blank (because I unchecked the End2 Navigation Property checkbox in the Add Association dialog), I get Error 2027: No mapping specified for the following EntitySet/AssociationSet - Child.

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• Passing a Java object from one Struts action to another

  - by Bernhard V

  Hello! In one of my Struts action I've got the following code in a method: ... List<Object> retrievedListOfObjects = c.getListOfObjects(); return mapping.findForward("fw_view"); } fw_view leads to a new Struts action with another Struts form. Let's say this form has got among others the following field List<Object> listOfObjects; I now want to pass the retrievedListOfObjects from within the first Struts action to the form of the following Struts action. Is this possible without storing it in the session?

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• Strange exception while using linq2sql

  - by zerkms

  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.ArgumentNullException: Value cannot be null. Parameter name: mapping Source Error: Line 45: #endregion Line 46: Line 47: public db() : Line 48: base(global::data.Properties.Settings.Default.nanocrmConnectionString, mappingSource) Line 49: { this is what i get if i implement such class: partial class db { static db _db = new db(); public static db GetInstance() { return _db; } } db is a linq2sql datacontext why this hapenned and how to solve this?

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• Is frameworks really necessary for this problem?

  - by The Elite Gentleman

  Hi Guys I'm creating an online music store application (in Java) for signed and unsigned artist for my client. I'm currently using Struts 1.3.10 (I was recommended Spring but Spring setup is sort of similar to Struts) for my Web application. My Database is currently a MySQL 5 (or higher) and I'm using a DAO pattern to talk to it. There are limitations to using Struts and DAO's (e.g. Multiple File upload in Struts is not implemented the same way as multiple String parameters, and for DAO's, there lacks a Publish-Subscribe feature). Is what I'm doing the best way forward or should I go straight Hibernate (or similar) and move out of Struts? What are the performance implications or technical issues that you've experienced with the same setup I have? The client doesn't care how I do it as long as it is done.

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