repository-pattern

问题 I am having issues with my Transactions in that they are being escalated to a distributed transaction, which I don't want. From what I read, this is caused by opening multiple connections during the scope of the transaction. To correct this, I am re-working my code to be able to create one dbContext and pass it around to all the classes so I only have one context and hence one connection during the scope of the transaction. My question is, how do I create one instance of the context and pass

问题 Exception : System.InvalidOperationException: The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted. I have seen some solutions for the

问题 my question is a two part issue. I am using the repository and unit of work pattern with entity framework. I have the following StockTransferRepository and StockTransfer is my aggregateRoot. Public Class StockTransferRepository Inherits WMSBaseRepository(Of StockTransfer, Int64, Dictionary(Of String, String)) Implements IStockTransferRepository Public Sub New(uow As IUnitOfWork) MyBase.New(uow) End Sub Public Overrides Function GetObjectSet() As IQueryable(Of StockTransfer) Return

问题 i have this domain objects: public class Societa : EquatableObject<Societa> { public virtual int IdSocieta { get; set; } public virtual string NomeSocieta { get; set; } } public class Attivita { public virtual int IdAttivita { get; set; } public virtual IEnumerable<ProcessoEsaminato> Processi } public class ProcessoEsaminato { public virtual ProcessoSocieta ProcessoCoperto { get; set; } public virtual int Anno { get; set; } } public class ProcessoSocieta { public override int Id { get; set; }

问题 Domain entities shouldn't contain code related to persistence, thus they should be Persistence Ignorant PI Data that the domain model DM is interested in can be delivered to DM either through domain entities 's navigation properties or by upper layers ( ie UI layer or service layer ). But I also assumed that in scenarios where particular domain entity must dynamically decide what data it requires, it is perfectly acceptable for that entity to request that data via component such as Repository

问题 I’m developing a MVC Website based in codeplex EFMVC solution, and I’m using Entity Framework and Repository, Unit of Work and Command Patterns. My website needs to be a SaaS solution (software as a service) multiple database. In my legacy Asp.Net WebForms I have a XML file that holds all the different string connections and I’m trying to use the same strategy. So in my LoginController I create a command that has company (to identify in which database will be connected) username and password.

问题 I am trying to create a repository class for each table. For example I have TableA, TableB and TableC. TableB and TableC has Foreign key to TableA. I created an interface for TableA, TableB and TableC with SaveData() and ListData(). I have MVC form which inserts the data into these tables. When implementing these interface methods do I have to create a seperate class for each interface? Please let me if I am doing right. I appreciate any help. Public interface ITableA { void SaveData

问题 I got the following objects: public class DbRepository<T> implements DbRepositoryInterface<T>{ protected T model; protected DbRepository(T model) { System.out.println("DbRepository created."); this.model = model; } @Override public T getModel() { return model; } } public interface DbRepositoryInterface<T> { public T getModel(); } public class PlayerDbRepository extends DbRepository<Player> { } In my code, where I want to make use of the PlayerDbRepository I would like to call:

问题 I have two tables with a Many-To-Many relationship like this: User( emailaddress , Name) UserAlerts( emailaddress , AlertId ) Alert( AlertId ,Title) Alerts have already been added to the database. When inserting a new user, I am doing a lookup on the AlertRepository . The problem is, Instead of creating a record in the User and the UsertAlerts tables only, its also adding an extra Alert record. I am using the following code: public ActionResult Register(UserModel model, int[] Alerts) User

问题 I want to use the elasticsearchrepository with Java Spring Boot: https://github.com/spring-projects/spring-data-elasticsearch It is not a RELEASE version, but should work for elasticsearch 5.4.0. I'm using ELK stack 5.x. I have the following pom.xml dependencies: <repositories> <repository> <id>elasticsearch-releases</id> <url>https://artifacts.elastic.co/maven</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>false</enabled> </snapshots> </repository> <dependency>