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  • c++ specialized overload?

    - by acidzombie24
    -edit- i am trying to close the question. i solved the problem with boost::is_base_and_derived In my class i want to do two things. 1) Copy int, floats and other normal values 2) Copy structs that supply a special copy function (template T copyAs(); } the struct MUST NOT return int's unless i explicitly say ints. I do not want the programmer mistaking the mistake by doing int a = thatClass; -edit- someone mention classes dont return anything, i mean using the operator Type() overload. How do i create my copy operator in such a way i can copy both 1) ints, floats etc and the the struct restricted in the way i mention in 2). i tried doing template <class T2> T operator = (const T2& v); which would cover my ints, floats etc. But how would it differentiate from structs? so i wrote T operator = (const SomeGenericBase& v); The idea was the GenericBase would be unsed instead then i can do v.Whatever. But that backfires bc the functions i want wouldnt exist, unless i use virtual, but virtual templates dont exist. Also i would hate to use virtual I think the solution is to get rid of ints and have it convert to something that can do .as(). So i wrote something up but now i have the same problem, how does that differentiate ints and structs that have the .as() function template?

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  • How do I organize C# classes that inherit from one another, but also have properties that inherit from one another?

    - by Chris
    I have an application that has a concept of a Venue, a place where events happen. A Venue is owned by a Company and has many VenueParts. So, it looks like this: public abstract class Venue { public int Id { get; set; } public string Name { get; set; } public virtual Company Company { get; set; } public virtual ICollection<VenuePart> VenueParts { get; set; } } A Venue can be a GolfCourseVenue, which is a Venue that has a Slope and a specific kind of VenuePart called a HoleVenuePart: public class GolfCourseVenue { public string Slope { get; set; } public virtual ICollection<HoleVenuePart> Holes { get; set; } } In the future, there may also be other kinds of Venues that all inherit from Venue. They might add their own fields, and will always have VenueParts of their own specific type. My declarations above seem wrong, because now I have a GolfCourseVenue with two collections, when really it should just have the one. I can't override it, because the type is different, right? When I run reports, I would like to refer to the classes generically, where I just spit out Venues and VenueParts. But, when I render forms and such, I would like to be specific. I have a lot of relationships like this and am wondering what I am doing wrong. For example, I have an Order that has OrderItems, but also specific kinds of Orders that have specific kinds of OrderItems.

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  • [c++] - Help about class and error: C3861

    - by Chelsea_cole
    Can someone help me in this error? in "cDef.h" : #pragma once class cDef { public: static int STATE_LOGO; static int STATE_MENU; static int MESSAGE_ENTER; static int MESSAGE_UPDATE; static int MESSAGE_PAINT; static int MESSAGE_EXIT; }; in "GameState.h": #pragma once #ifndef _GameState_ #define _GameState_ #include "cDef.h" class MainGame; class GameState; class GameState { public: MainGame *mg; int GAME_STATE_DEF; virtual void MessengeEnter(int message) = 0; virtual void MessengeUpdate(int message,int keys) = 0; virtual void MessengePaint(int message,CDC *pDc) = 0; void StateHandler(int message,CDC *pDc,int keys); public: GameState(void); public: ~GameState(void); }; #endif in "GameState.cpp": #include "StdAfx.h" #include "GameState.h" GameState::GameState(void) { GAME_STATE_DEF = -1; } GameState::~GameState(void) { } void GameState::StateHandler(int message,CDC *pDc,int keys) { if(message == cDef.MESSAGE_ENTER) { MessageEnter(message); } if(message == cDef.MESSAGE_UPDATE) { MessageUpdate(message,keys); } if(message == cDef.MESSAGE_PAINT) { MessagePaint(message,pDC); } } error: warning C4832: token '.' is illegal after UDT 'cDef' see declaration of 'cDef' error C3861: 'MessageUpdate': identifier not found error C3861: 'MessageEnter': identifier not found error C3861: 'MessagePaint': identifier not found ..... Thanks in advance!

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  • FluentNHibernate error -- "Invalid object name"

    - by goober
    I'm attempting to do the most simple of mappings with FluentNHibernate & Sql2005. Basically, I have a database table called "sv_Categories". I'd like to add a category, setting the ID automatically, and adding the userid and title supplied. Database table layout: CategoryID -- int -- not-null, primary key, auto-incrementing UserID -- uniqueidentifier -- not null Title -- varchar(50) -- not null Simple. My SessionFactory code (which works, as far as I can tell): _SessionFactory = Fluently.Configure().Database( MsSqlConfiguration.MsSql2005 .ConnectionString(c => c.FromConnectionStringWithKey("SVTest"))) .Mappings(x => x.FluentMappings.AddFromAssemblyOf<CategoryMap>()) .BuildSessionFactory(); My ClassMap code: public class CategoryMap : ClassMap<Category> { public CategoryMap() { Id(x => x.ID).Column("CategoryID").Unique(); Map(x => x.Title).Column("Title").Not.Nullable(); Map(x => x.UserID).Column("UserID").Not.Nullable(); } } My Class code: public class Category { public virtual int ID { get; private set; } public virtual string Title { get; set; } public virtual Guid UserID { get; set; } public Category() { // do nothing } } And the page where I save the object: public void Add(Category catToAdd) { using (ISession session = SessionProvider.GetSession()) { using (ITransaction Transaction = session.BeginTransaction()) { session.Save(catToAdd); Transaction.Commit(); } } } I receive the error Invalid object name 'Category'. 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.Data.SqlClient.SqlException: Invalid object name 'Category'. I think it might be that I haven't told the CategoryMap class to use the "sv_Categories" table, but I'm not sure how to do that. Any help would be appreciated. Thanks!

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  • Asp.Net MVC3 - How create Dynamic DropDownList

    - by Bibo
    I found many articles on this but still I don´t know how exactly to do this. I am trying to create my own blog engine, I have View for create article (I am using EF and Code first) and now I must fill number of category in which article should be add but I want to change it to dropdownlist with names of categories. My model looks this: public class Article { public int ArticleID { get; set; } [Required] public string Title { get; set; } [Required] public int CategoryID { get; set; } public DateTime Date { get; set; } [Required()] [DataType(DataType.MultilineText)] [AllowHtml] public string Text { get; set; } public virtual Category Category { get; set; } public IEnumerable<SelectListItem> Categories { get; set; } public virtual ICollection<Comment> Comments { get; set; } } public class Category { public int CategoryID { get; set; } [Required] public string Name { get; set; } public virtual ICollection<Article> Articles { get; set; } } I know I must use Enum (or I think) but I am not exactly sure how. I don´t know which tutorial from that I found is best for me.

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  • How to find unmapped properties in a NHibernate mapped class?

    - by haarrrgh
    I just had a NHibernate related problem where I forgot to map one property of a class. A very simplified example: public class MyClass { public virtual int ID { get; set; } public virtual string SomeText { get; set; } public virtual int SomeNumber { get; set; } } ...and the mapping file: <?xml version="1.0" encoding="utf-8" ?> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="MyAssembly" namespace="MyAssembly.MyNamespace"> <class name="MyClass" table="SomeTable"> <property name="ID" /> <property name="SomeText" /> </class> </hibernate-mapping> In this simple example, you can see the problem at once: there is a property named "SomeNumber" in the class, but not in the mapping file. So NHibernate will not map it and it will always be zero. The real class had a lot more properties, so the problem was not as easy to see and it took me quite some time to figure out why SomeNumber always returned zero even though I was 100% sure that the value in the database was != zero. So, here is my question: Is there some simple way to find this out via NHibernate? Like a compiler warning when a class is mapped, but some of its properties are not. Or some query that I can run that shows me unmapped properties in mapped classes...you get the idea. (Plus, it would be nice if I could exclude some legacy columns that I really don't want mapped.)

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  • Base class Undefined WEIRD problem . Need help

    - by nXqd
    My CGameStateLogo which inherit from CGameState: CGameStateLogo.h #pragma once #include "GameState.h" class CGameMain; class CGameState; class CGameStateLogo: public CGameState { public: void MessageEnter (); void MessageUpdate( int iKey ); void MessagePaint( HDC* pDC ); public: CGameStateLogo(CGameMain* pGameMain); CGameStateLogo(void); ~CGameStateLogo(void); }; CGameState.h #pragma once #include "GameMain.h" #include "MyBitmap.h" class CGameMain; class CMyBitmap; class CGameState { public: CMyBitmap* pbmCurrent; CGameMain* pGM; int GameStateID; virtual void MessageEnter () = 0; virtual void MessageUpdate( int iKey ) = 0; virtual void MessagePaint( HDC* pDC ) = 0; void StateHandler ( int msg, HDC* pDC, int key ); public: CGameState(void); ~CGameState(void); }; Thanks for reading this :)

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  • EF Code First, how can I achieve two foreign keys from one table to other table?

    - by Yoo Matsuo
    I've recently downloaded Entity Framework Code First CTP5, and have a trouble with this scenario. I have two tables as follows: Members table ID Name Comments table ID Comment CommentedMemberID CommentMemberID And, the data should be like the following: Members ID Name 1 Mike 2 John 3 Tom Comments ID Comment CommentedMemberID CommentMemberID 1 Good 1 2 2 Good 1 3 3 Bad 2 1 Then, I coded as shown below: public class Member { public int ID {get; set; } public string Name { get; set;} public virtual ICollection Comments { get; set;} } public class Comment { public int ID { get; set; } public string Comment { get; set; } public int CommentedMemberID { get; set; } public int CommentMemberID{ get; set; } public virtual Member CommentedMember { get; set; } public virtual Member CommentMember { get; set; } } public class TestContext : DbContext { public DbSet Members { get; set; } public DbSet Comments { get; set; } } But when I run these models on my cshtml, it gives me errors saying "Cannot create CommentMember instance" or something like that (Sorry, I already changed my models to proceed the EF Code First evaluation, so can't reproduce the same error). I've also tried to use OnModelCreating on the TestContext, but can't find any good instructions and don't know what to do. I saw a blog post of the EF Code First CTP3, and it seems there was a RelatedTo attribute in that version, but now it has gone. Could anyone know how to get it work properly? Or is this a totally wrong way to go with this scenario? Thanks, Yoo

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  • Can you explain this generics behavior and if I have a workaround?

    - by insta
    Sample program below: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace GenericsTest { class Program { static void Main(string[] args) { IRetrievable<int, User> repo = new FakeRepository(); Console.WriteLine(repo.Retrieve(35)); } } class User { public int Id { get; set; } public string Name { get; set; } } class FakeRepository : BaseRepository<User>, ICreatable<User>, IDeletable<User>, IRetrievable<int, User> { // why do I have to implement this here, instead of letting the // TKey generics implementation in the baseclass handle it? //public User Retrieve(int input) //{ // throw new NotImplementedException(); //} } class BaseRepository<TPoco> where TPoco : class,new() { public virtual TPoco Create() { return new TPoco(); } public virtual bool Delete(TPoco item) { return true; } public virtual TPoco Retrieve<TKey>(TKey input) { return null; } } interface ICreatable<TPoco> { TPoco Create(); } interface IDeletable<TPoco> { bool Delete(TPoco item); } interface IRetrievable<TKey, TPoco> { TPoco Retrieve(TKey input); } } This sample program represents the interfaces my actual program uses, and demonstrates the problem I'm having (commented out in FakeRepository). I would like for this method call to be generically handled by the base class (which in my real example is able to handle 95% of the cases given to it), allowing for overrides in the child classes by specifying the type of TKey explicitly. It doesn't seem to matter what parameter constraints I use for the IRetrievable, I can never get the method call to fall through to the base class. Also, if anyone can see an alternate way to implement this kind of behavior and get the result I'm ultimately looking for, I would be very interested to see it. Thoughts?

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  • Context path routing in Tomcat ( service swapping )

    - by jojovilco
    Here is what I would like to achieve: I have a web service A which I want to be able to deploy side by side with other web services of type A - different version(s). For now I assume 2 instances side by side. I need it because the service has a warm up stage, which takes some time to build up stuff from DB and only after it is ready it can start serving requests ... I was thinking to deploy to Tomcat context paths like: "/ServiceA-1.0", "/ServiceA-2.0" and then have a "virtual" context like "/ServiceA" which will point to the desired physical service e.g. "/ServiceA-1.0". So external world will know about ServiceA, but internally, my ServiceA related stack would know about versioned ServiceA url ( there are more components involved but only ServiceA is serving outer world ). When new service is ready, I would just reconfigure the "virtual" context to point to a new service. So far, I was not able to find out how to do this with Tomcat and starting to tkink it is not possible. I found suggestions to place Apache Server in front of Tomcat and do the routing there, but I do not want to enroll another piece of software unless necessary. My questions are: - is this kind of a "virtual" context and routing possible to do with Tomcat? - any other options, wisdom and lessons learned how to achieve this kind of service swapping scenario? Best, Jozef

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  • XML parsing error: 'A string literal was expected' when inserting values into table

    - by Christian
    In Microsoft Sequel Server 2008 I am attempting to insert values into an sql table with the columns type_id of datatype int and xml_info of datatype XML. I am using the following query: INSERT INTO tbl_applied_devices ([type_id],[xml_info]) VALUES (1,'<Profile ID=99><Server><ID>BC4A18CA-AFB5-4268-BDA9-C990DAFE7783</ID> <Name>localhost</Name><Services></Services></Server></Profile>') But I keep getting this error: Msg 9413, Level 16, State 1, Line 4 XML parsing: line 1, character 13, A string literal was expected What am I doing incorrectly? Thank you for the help. EDIT: I found that the source of the error is the xml element's ID attribute, where seems to be what is causing the error. How can I correctly insert xml with an attribute ? Do I need to somehow escape one of the characters?

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  • How to set disabled in MVC htmlAttribute

    - by Ollie
    When using an HTML Helper, what is the best method to set an attribute based on a condition. For example <%if (Page.User.IsInRole("administrator")) {%> <%=Html.TextBoxFor(m => m.FirstName, new {@class='contactDetails'}%> <%} else {%> <%=Html.TextBoxFor(m => m.FirstName, new {@class='contactDetails', disabled = true}%> <%}%> There must be a better way to programmatically add just one additional KeyPair to the anonymous type? Can't use new { .... disabled = Page.User.IsInRole("administrator") ... } as the browser takes any disabled attribute value as making the input disabled

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  • xsl literal with <xsl:if>

    - by Elena
    Hi, I have to write a very simple code in xsl: IF column=0 if result = .34 set background color to green and write $result, but if result = 0.10 set background color to white and write the word "QQQ" and what doesn't work is: <xsl:if test="$result = 0.35 and $column = 0"> <xsl:attribute name='background-color'>#669933</xsl:attribute> <xsl:value-of select="result"/> </xsl:if> <xsl:if test="$result = 0.10"> <xsl:value-of select="QQQ"/> </xsl:if> any suggestions? thanks in advance

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  • XmlSerializer - There was an error reflecting type

    - by oo
    Using C# .NET 2.0, I have a composite data class that does have the [Serializable] attribute on it. I am creating an XMLSerializer class and passing that into the constructor: XmlSerializer serializer = new XmlSerializer(typeof(DataClass)); I am getting an exception saying: There was an error reflecting type. Inside the data class there is another composite object. Does this also need to have the [Serializable] attribute or by having it on the top object does it recursively apply it to all objects inside? Any thoughts?

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  • UITableView Core Data reordering

    - by PCWiz
    I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of items, and I need to enumerate through all the objects in the fetched results and set their displayOrder attribute. In the given code in the question I linked to, the table view delegate method calls a method like this [self FF_fetchResults];, and the code for that method is not given so its hard to tell what exactly it is. Is there any sample code that demonstrates this? That would be simpler to look at than sharing large chunks of code. Thanks

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  • UITableView Core Data reordering

    - by PCWiz
    I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of items, and I need to enumerate through all the objects in the fetched results and set their displayOrder attribute. In the given code in the question I linked to, the table view delegate method calls a method like this [self FF_fetchResults];, and the code for that method is not given so its hard to tell what exactly it is. Is there any sample code that demonstrates this? That would be simpler to look at than sharing large chunks of code. Thanks

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  • Model binding nested collections in ASP.NET MVC

    - by MartinHN
    Hi I'm using Steve Sanderson's BeginCollectionItem helper with ASP.NET MVC 2 to model bind a collection if items. That works fine, as long as the Model of the collection items does not contain another collection. I have a model like this: -Product --Variants ---IncludedAttributes Whenever I render and model bind the Variants collection, it works jusst fine. But with the IncludedAttributes collection, I cannot use the BeginCollectionItem helper because the id and names value won't honor the id and names value that was produced for it's parent Variant: <div class="variant"> <input type="hidden" value="bbd4fdd4-fa22-49f9-8a5e-3ff7e2942126" autocomplete="off" name="Variants.index"> <input type="hidden" value="0" name="Variants[bbd4fdd4-fa22-49f9-8a5e-3ff7e2942126].SlotAmount" id="Variants_bbd4fdd4-fa22-49f9-8a5e-3ff7e2942126__SlotAmount"> <table class="included-attributes"> <input type="hidden" value="0" name="Variants.IncludedAttributes[c5989db5-b1e1-485b-b09d-a9e50dd1d2cb].Id" id="Variants_IncludedAttributes_c5989db5-b1e1-485b-b09d-a9e50dd1d2cb__Id" class="attribute-id"> <tr> <td> <input type="hidden" value="0" name="Variants.IncludedAttributes[c5989db5-b1e1-485b-b09d-a9e50dd1d2cb].Id" id="Variants_IncludedAttributes_c5989db5-b1e1-485b-b09d-a9e50dd1d2cb__Id" class="attribute-id"> </td> </tr> </table> </div> If you look at the name of the first hidden field inside the table, it is Variants.IncludedAttributes - where it should have been Variants[bbd4fdd4-fa22-49f9-8a5e-3ff7e2942126].IncludedAttributes[...]... That is because when I call BeginCollectionItem the second time (On the IncludedAttributes collection) there's given no information about the item index value of it's parent Variant. My code for rendering a Variant looks like this: <div class="product-variant round-content-box grid_6" data-id="<%: Model.AttributeType.Id %>"> <h2><%: Model.AttributeType.AttributeTypeName %></h2> <div class="box-content"> <% using (Html.BeginCollectionItem("Variants")) { %> <div class="slot-amount"> <label class="inline" for="slotAmountSelectList"><%: Text.amountOfThisVariant %>:</label> <select id="slotAmountSelectList"><option value="1">1</option><option value="2">2</option></select> </div> <div class="add-values"> <label class="inline" for="txtProductAttributeSearch"><%: Text.addVariantItems %>:</label> <input type="text" id="txtProductAttributeSearch" class="product-attribute-search" /><span><%: Text.or %> <a class="select-from-list-link" href="#select-from-list" data-id="<%: Model.AttributeType.Id %>"><%: Text.selectFromList.ToLowerInvariant() %></a></span> <div class="clear"></div> </div> <%: Html.HiddenFor(m=>m.SlotAmount) %> <div class="included-attributes"> <table> <thead> <tr> <th><%: Text.name %></th> <th style="width: 80px;"><%: Text.price %></th> <th><%: Text.shipping %></th> <th style="width: 90px;"><%: Text.image %></th> </tr> </thead> <tbody> <% for (int i = 0; i < Model.IncludedAttributes.Count; i++) { %> <tr><%: Html.EditorFor(m => m.IncludedAttributes[i]) %></tr> <% } %> </tbody> </table> </div> <% } %> </div> </div> And the code for rendering an IncludedAttribute: <% using (Html.BeginCollectionItem("Variants.IncludedAttributes")) { %> <td> <%: Model.AttributeName %> <%: Html.HiddenFor(m => m.Id, new { @class = "attribute-id" })%> <%: Html.HiddenFor(m => m.ProductAttributeTypeId) %> </td> <td><%: Model.Price.ToCurrencyString() %></td> <td><%: Html.DropDownListFor(m => m.RequiredShippingTypeId, AppData.GetShippingTypesSelectListItems(Model.RequiredShippingTypeId)) %></td> <td><%: Model.ImageId %></td> <% } %>

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  • How to conditionally exclude features from "FeaturesDlg" in WiX 3.0 from a managed Custom Action (DT

    - by Gerald
    I am trying to put together an installer using WiX 3.0 and I'm unsure about one thing. I would like to use the FeaturesDlg dialog to allow the users to select features to install, but I need to be able to conditionally exclude some features from the list based on some input previously received, preferably from a managed Custom Action. I see that if I set the "Display" attribute of a Feature to "hidden" in the .wxs file that it does what I want, but I can't figure out a way to change that attribute at runtime. Any pointers would be great.

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  • Seriously, what's the deal with InheritInChildApplications? Does this work for anyone??

    - by mare
    I've tried wrapping my <system.web> with <location path="." InheritInChildApplications="false"> like this <location path="." InheritInChildApplications="false"> <system.web>...</system.web> </location> But VS 2010 Web Developer Express keeps saying "The 'InheritInChildApplications' attribute is not allowed" and when I run my web app there's an error: "HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid." Config Error Unrecognized attribute 'InheritInChildApplications'. I've seen some smartguys all over the Internet discussing this and how it is working for them but there's much larger number of people here at SO and other places that did not get this to work. My configuration: ASP.NET 4.0 RTM, VS 2010, IIS 7.5

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  • ASP.NET MVC: AuthorizeAttribute on default page

    - by AlexB
    The default controller in my ASP.NET MVC project is decorated with the [Authorize] attribute. When I deploy the website on my development machine and access the website, I am redirected to the login page (defined in forms loginUrl section of the Web.Config). Result: everything works as expected. When I publish the website on our production server (Windows Server 2008, IIS 7, DefaultAppPool) and access the website, the expected address shows in the address bar (/Account/LogOn?ReturnUrl=*my_expected_return_url*), but the page displays "You do not have permission to view this directory or page." instead of the login page. If I remove the [Authorize] attribute on the default controller/action, the page displays correctly. My Web.Config file: sessionState mode="InProc" timeout="30" authentication mode="Forms" forms loginUrl="~/Account/LogOn" timeout="2880"

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  • How to map a property with formula in NHibernate?

    - by yapiskan
    I have a class which I want to add a property with using formula attribute. Here is the mapping that I use in mapping file. <property name="CurrentUserVote" type="Climate.Domain.Vote, Climate.Domain" formula="(select v from Vote v where v.AchievementId=Id and (v.IP=:CurrentUserVoteFilter.CurrentUserIP))"></property> As you see, I want this property to be an object which refers to class that already has an nhibernate mapping. Is it possible to map a property with formula attribute to a class? Thanks in advance.

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  • DBD::CSV: How can I generate different behavior with the two f_ext-options ".csv" and ".csv/r"?

    - by sid_com
    This is from the DBD::File-documentation: f_ext This attribute is used for setting the file extension where (CSV) files are opened. There are several possibilities. DBI:CSV:f_dir=data;f_ext=.csv In this case, DBD::File will open only table.csv if both table.csv and table exist in the datadir. The table will still be named table. If your datadir has files with extensions, and you do not pass this attribute, your table is named table.csv, which is probably not what you wanted. The extension is always case-insensitive. The table names are not. DBI:CSV:f_dir=data;f_ext=.csv/r In this case the extension is required, and all filenames that do not match are ignored. It was not possible for me to generate different behavior with the two options ".csv/r" and ".csv". Could someone show me an example, where I can see the difference between ".csv/r" and ".csv"?

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  • invoke javax.el.MethodExpression from jsf component

    - by marcos
    Hello gurus I have a jsp tag wich takes a javax.el.MethodExpression as attribute: <%@ attribute name="action" required="true" type="javax.el.MethodExpression" rtexprvalue="true" %> within the same tag i have: <h:commandLink action="#{action}"> link text </h:commandLink> I'm getting the following error when i try to click the link: javax.faces.FacesException: #{action}: org.apache.jasper.el.JspMethodNotFoundException: /WEB-INF/tags/pager/pager.tag(17,1) '#{action}' Identity 'action' was null and was unable to invoke is it possible for the commandLink to properly invoke the "action" method?

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  • Bidirectional Serialization with Linq

    - by Andy
    Anyone know why only undirectional serialization is supported in the Linq designer? Consider the following example: Say we have a Customer who requested an Order containing Products. We set the Serialization Mode in the Linq designer to Unidirectional to enable serialization. When looking at the code for the Order object, the DataMember attribute is added to all its internal properties such as ID,OrderNumber, etc. and also to the EntitySet of Products, but not to Customer. One can get around this by manually adding the DataMember attribute to Customer, but this becomes quite cumbersome when there's loads of entities in the database.

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  • insert and modify a record in an entity using Core Data

    - by aminfar
    I tried to find the answer of my question on the internet, but I could not. I have a simple entity in Core data that has a Value attribute (that is integer) and a Date attribute. I want to define two methods in my .m file. First method is the ADD method. It takes two arguments: an integer value (entered by user in UI) and a date (current date by default). and then insert a record into the entity based on the arguments. Second method is like an increment method. It uses the Date as a key to find a record and then increment the integer value of that record. I don't know how to write these methods. (assume that we have an Array Controller for the table in the xib file)

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