Entity Framework はobject-relational mapping フレームワークで、データをオブジェクトとして扱うために使われます。Visual Studio のADO.NET Entity Data Model ウィザードを実行するとEntity Model を作成できますが、このモデルファーストアプローチでは、データソースに変更があった場合やエンティティ操作をより制御したい場合は不都合があります。この記事では、CData ADO.NET Provider を使いコードファーストアプローチでAlfresco にアクセスします。
To connect to Alfresco, the following connection properties must be supplied: User, Password, and InstanceUrl. User and Password correspond to the login credentials that you use to access Alfresco in a web browser. InstanceUrl corresponds to the Alfresco instance you will be querying. For instance, if you expect your queries to hit https://search-demo.dev.alfresco.me/alfresco/api/-default-/public/search/versions/1/sql, you should supply search-demo.dev.alfresco.me for InstanceUrl.
<configuration>
... <connectionStrings>
<add name="AlfrescoContext" connectionString="Offline=False;User=MyUsername; Password=MyPassword; Format=Solr; InstanceUrl=api-explorer.alfresco.com;" providerName="System.Data.CData.Alfresco" />
</connectionStrings>
<entityFramework>
<providers>
... <provider invariantName="System.Data.CData.Alfresco" type="System.Data.CData.Alfresco.AlfrescoProviderServices, System.Data.CData.Alfresco.Entities.EF6" />
</providers>
<entityFramework>
</configuration>
</code>
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Entity.ModelConfiguration.Conventions;
class AlfrescoContext :DbContext {
public AlfrescoContext() { }
protected override void OnModelCreating(DbModelBuilder modelBuilder) { // To remove the requests to the Migration History table
Database.SetInitializer<AlfrescoContext>(null); // To remove the plural names modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
}
using System.Data.Entity.ModelConfiguration;
using System.ComponentModel.DataAnnotations.Schema;
public class Alfresco {
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public System.String Id { get; set; }
public System.String DBID { get; set; }
}
public class AlfrescoMap :EntityTypeConfiguration<Alfresco> {
public AlfrescoMap() {
this.ToTable("Alfresco");
this.HasKey(Alfresco => Alfresco.Id);
this.Property(Alfresco => Alfresco.DBID);
}
}
public DbSet<Alfresco> Alfresco { set; get; }
AlfrescoContext context = new AlfrescoContext();
context.Configuration.UseDatabaseNullSemantics = true;
var query = from line in context.Alfresco select line;