// other methods are convenience wrappers around this.
private static T UpdateGraph <T>(this DbContext context, T entity, Expression <Func <IUpdateConfiguration <T>, object> > mapping,
string mappingScheme, UpdateParams updateParams) where T : class
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
var entityManager = new EntityManager(context);
var queryLoader = new QueryLoader(context, entityManager);
var register = new AggregateRegister(new CacheProvider());
var root = GetRootNode(mapping, mappingScheme, register);
var differ = new GraphDiffer <T>(context, queryLoader, entityManager, root);
var queryMode = updateParams != null ? updateParams.QueryMode : QueryMode.SingleQuery;
return(differ.Merge(entity, queryMode));
}
/// <summary>
/// Merges a graph of entities with the data store.
/// </summary>
/// <typeparam name="T">The type of the root entity</typeparam>
/// <param name="context">The database context to attach / detach.</param>
/// <param name="entity">The root entity.</param>
/// <param name="mappingScheme">Pre-configured mappingScheme</param>
/// <param name="updateParams">Update configuration overrides</param>
/// <returns>The attached entity graph</returns>
public static T UpdateGraph <T>(this DbContext context, T entity, string mappingScheme, UpdateParams updateParams = null) where T : class
{
return(UpdateGraph(context, entity, null, mappingScheme, updateParams));
}
/// <summary>
/// Merges a graph of entities with the data store.
/// </summary>
/// <typeparam name="T">The type of the root entity</typeparam>
/// <param name="context">The database context to attach / detach.</param>
/// <param name="entity">The root entity.</param>
/// <param name="updateParams">Update configuration overrides</param>
/// <returns>The attached entity graph</returns>
public static T UpdateGraph <T>(this DbContext context, T entity, UpdateParams updateParams = null) where T : class
{
return(UpdateGraph(context, entity, null, null, updateParams));
}
/// <summary>
/// Merges a graph of entities with the data store.
/// </summary>
/// <typeparam name="T">The type of the root entity</typeparam>
/// <param name="context">The database context to attach / detach.</param>
/// <param name="entity">The root entity.</param>
/// <param name="mapping">The mapping configuration to define the bounds of the graph</param>
/// <param name="updateParams">Update configuration overrides</param>
/// <returns>The attached entity graph</returns>
public static T UpdateGraph <T>(this DbContext context, T entity, Expression <Func <IUpdateConfiguration <T>, object> > mapping, UpdateParams updateParams = null) where T : class
{
return(UpdateGraph(context, entity, mapping, null, updateParams));
}