/// <summary>
/// 处理实体的关联的属性。
/// </summary>
/// <param name="entity"></param>
/// <param name="properties"></param>
private async Task HandleRelationPropertiesAsync(IEntity entity, IEnumerable <IProperty> properties, CancellationToken cancellationToken = default)
{
foreach (RelationProperty property in properties)
{
var queryable = (IQueryable)context.GetDbSet(property.RelationalType);
switch (property.RelationalPropertyType)
{
case RelationPropertyType.Entity:
var refEntity = (IEntity)entity.GetValue(property).GetValue();
switch (refEntity.EntityState)
{
case EntityState.Modified:
await queryable.UpdateEntityAsync(refEntity, cancellationToken);
refEntity.SetState(EntityState.Unchanged);
break;
}
await HandleRelationPropertiesAsync(refEntity, cancellationToken);
break;
case RelationPropertyType.EntitySet:
var value = entity.GetValue(property);
if (PropertyValue.IsEmpty(value))
{
value = entity.GetOldValue(property);
}
if (!PropertyValue.IsEmpty(value))
{
await HandleEntitySetPropertyAsync(queryable, entity, value.GetValue() as IEntitySet, property, cancellationToken);
}
break;
}
}
}
/// <summary>
/// 处理实体的关联的属性。
/// </summary>
/// <param name="entity"></param>
/// <param name="properties"></param>
private void HandleRelationProperties(IEntity entity, IEnumerable <IProperty> properties)
{
foreach (RelationProperty property in properties)
{
var queryable = (IQueryable)context.GetDbSet(property.RelationalType);
switch (property.RelationalPropertyType)
{
case RelationPropertyType.Entity:
var refEntity = (IEntity)entity.GetValue(property).GetValue();
switch (refEntity.EntityState)
{
case EntityState.Modified:
queryable.UpdateEntity(refEntity);
refEntity.SetState(EntityState.Unchanged);
break;
}
HandleRelationProperties(refEntity);
break;
case RelationPropertyType.EntitySet:
var value = entity.GetValue(property);
if (PropertyValue.IsEmpty(value))
{
value = entity.GetOldValue(property);
}
if (!PropertyValue.IsEmpty(value))
{
HandleRelationEntitySet(queryable, entity, value.GetValue() as IEntitySet, property);
}
break;
}
}
}