public override PropertyValue GetValue(IEntity entity, IProperty property)
{
var entityProperty = property.As <EntityProperty>();
var instanceName = GetInstanceName(entity, entityProperty.RelationType);
var environment = GetEnvironment(entity);
using (var context = new InternalContext(instanceName))
{
context.As <IEntityPersistentEnvironment>(s => s.Environment = environment);
context.As <IEntityPersistentInstanceContainer>(s => s.InstanceName = instanceName);
var provider = context.CreateRepositoryProvider(entityProperty.RelationType);
var expression = BuidRelationExpression(entity, entityProperty);
if (expression != null)
{
var value = Execute(provider.Queryable, expression);
//设置实体所属的实体Owner
value.As <IEntityRelation>(e => e.Owner = new EntityOwner(entity, property));
return(value == null ? PropertyValue.Empty : PropertyValue.NewValue(value));
}
return(PropertyValue.Empty);
}
}
/// <summary>
/// 初始化 <see cref="DefaultRepositoryProvider"/> 类的新实例。
/// </summary>
/// <param name="context"></param>
public DefaultRepositoryProvider(InternalContext context)
{
this.context = context;
var entityQueryProvider = new EntityQueryProvider(context);
context.As <IEntityPersistentInstanceContainer>(s => entityQueryProvider.InitializeInstanceName(s.InstanceName));
QueryProvider = new QueryProvider(entityQueryProvider);
Queryable = new QuerySet <TEntity>(QueryProvider, null);
}
public override PropertyValue GetValue(IEntity entity, IProperty property)
{
var referenceProperty = property.As <ReferenceProperty>();
var instanceName = GetInstanceName(entity, referenceProperty.RelationType);
var environment = GetEnvironment(entity);
using (var context = new InternalContext(instanceName))
{
context.As <IEntityPersistentEnvironment>(s => s.Environment = environment);
context.As <IEntityPersistentInstanceContainer>(s => s.InstanceName = instanceName);
var provider = context.CreateRepositoryProvider(referenceProperty.RelationType);
var expression = BuidRelationExpression(entity, referenceProperty);
object result = null;
if (expression != null)
{
result = Execute(provider.Queryable, expression);
}
return(PropertyValueHelper.NewValue(result));
}
}
