public BinaryExpression GetDiscriminatorPredicate(IEntityType entityType)
{
if (!EntityType.IsAssignableFrom(entityType))
{
return(null);
}
var concreteEntityTypes
= entityType.GetConcreteTypesInHierarchy().ToList();
var discriminatorProperty = entityType.Cosmos().DiscriminatorProperty;
var discriminatorPredicate = Equal(
new KeyAccessExpression(discriminatorProperty, FromExpression),
Constant(concreteEntityTypes[0].Cosmos().DiscriminatorValue, discriminatorProperty.ClrType));
if (concreteEntityTypes.Count > 1)
{
discriminatorPredicate
= concreteEntityTypes
.Skip(1)
.Select(concreteEntityType
=> Constant(concreteEntityType.Cosmos().DiscriminatorValue, discriminatorProperty.ClrType))
.Aggregate(
discriminatorPredicate, (current, discriminatorValue) =>
OrElse(
Equal(new KeyAccessExpression(discriminatorProperty, FromExpression), discriminatorValue),
current));
}
return(discriminatorPredicate);
}
public DocumentSource(IEntityType entityType, CosmosDatabase database)
{
_collectionId = entityType.Cosmos().ContainerName;
_database = database;
_idProperty = entityType.FindProperty(StoreKeyConvention.IdPropertyName);
}
public DocumentSource(IEntityType entityType, CosmosDatabase database)
{
_collectionId = entityType.Cosmos().ContainerName;
_entityType = entityType;
_database = database;
}
