public async Task<SaveResult> SaveChanges(IEnumerable<IEntity> entitiesToSave, SaveOptions saveOptions) {
var entityManager = entitiesToSave.First().EntityAspect.EntityManager;
var saveBundleNode = PrepareSaveBundle(entitiesToSave, saveOptions);
try {
var saveResultJson =
await saveOptions.DataService.PostAsync(saveOptions.ResourceName, saveBundleNode.Serialize());
var jn = JNode.DeserializeFrom(saveResultJson);
if (jn.HasValues("Errors") || jn.HasValues("errors")) {
throw new SaveException(entityManager, jn);
}
return ProcessSaveResult(entityManager, saveOptions, jn);
} catch (DataServiceRequestException dsre) {
var jn = JNode.DeserializeFrom(dsre.ResponseContent);
throw new SaveException(entityManager, jn);
} catch (HttpRequestException e) {
throw new SaveException(e.Message, e);
}
}
private SaveResult ProcessSaveResult(EntityManager entityManager, SaveOptions saveOptions, string saveResultJson)
{
var jo = JObject.Parse(saveResultJson);
var jn = new JNode(jo);
var kms = jn.GetArray <KeyMapping>("KeyMappings");
var keyMappings = kms.Select(km => ToEntityKeys(km)).ToDictionary(tpl => tpl.Item1, tpl => tpl.Item2);
using (entityManager.NewIsLoadingBlock(false)) {
keyMappings.ForEach(km => {
var targetEntity = entityManager.GetEntityByKey(km.Key);
targetEntity.EntityAspect.SetDpValue(km.Key.EntityType.KeyProperties[0], km.Value.Values[0]);
});
var prop = jo.Property("Entities");
if (prop == null)
{
return(null);
}
var entityNodes = (JArray)prop.Value;
var serializer = new JsonSerializer();
var mappingContext = new MappingContext()
{
EntityManager = entityManager,
MergeStrategy = MergeStrategy.OverwriteChanges,
LoadingOperation = LoadingOperation.Save,
JsonResultsAdapter = saveOptions.DataService.JsonResultsAdapter
};
var jsonConverter = new JsonEntityConverter(mappingContext);
serializer.Converters.Add(jsonConverter);
// Don't use the result of the Deserialize call to get the list of entities
// because it won't include entities added on the server.
serializer.Deserialize <IEnumerable <IEntity> >(entityNodes.CreateReader());
var allEntities = mappingContext.Entities;
allEntities.ForEach(e => e.EntityAspect.AcceptChanges());
return(new SaveResult(allEntities, keyMappings));
}
}
private JNode PrepareSaveBundle(IEnumerable<IEntity> entitiesToSave, SaveOptions saveOptions) {
var jn = new JNode();
jn.AddArray("entities", entitiesToSave.Select(e => EntityToJNode(e)));
jn.AddJNode("saveOptions", saveOptions);
return jn;
}
private SaveResult ProcessSaveResult(EntityManager entityManager, SaveOptions saveOptions, JNode jNode) {
var kms = jNode.GetArray<KeyMapping>("KeyMappings");
var keyMappings = kms.Select(km => ToEntityKeys(km, entityManager.MetadataStore)).ToDictionary(tpl => tpl.Item1, tpl => tpl.Item2);
using (entityManager.NewIsLoadingBlock(false)) {
keyMappings.ForEach(km => {
var targetEntity = entityManager.GetEntityByKey(km.Key);
targetEntity.EntityAspect.SetDpValue(km.Key.EntityType.KeyProperties[0], km.Value.Values[0]);
});
var entityNodes = jNode.GetToken<JArray>("Entities");
var serializer = new JsonSerializer();
var mappingContext = new MappingContext() {
EntityManager = entityManager,
MergeStrategy = MergeStrategy.OverwriteChanges,
LoadingOperation = LoadingOperation.Save,
JsonResultsAdapter = saveOptions.DataService.JsonResultsAdapter
};
var jsonConverter = new JsonEntityConverter(mappingContext);
serializer.Converters.Add(jsonConverter);
// serializer.Converters.Add(new StringEnumConverter());
// Don't use the result of the Deserialize call to get the list of entities
// because it won't include entities added on the server.
serializer.Deserialize<IEnumerable<IEntity>>(entityNodes.CreateReader());
var allEntities = mappingContext.Entities;
allEntities.ForEach(e => e.EntityAspect.AcceptChanges());
return new SaveResult(allEntities, keyMappings);
}
}
public SaveOptions(SaveOptions saveOptions) {
ResourceName = saveOptions.ResourceName;
DataService = saveOptions.DataService;
Tag = saveOptions.Tag;
}
public async Task <SaveResult> SaveChanges(IEnumerable <IEntity> entitiesToSave, SaveOptions saveOptions)
{
var entityManager = entitiesToSave.First().EntityAspect.EntityManager;
var saveBundleNode = PrepareSaveBundle(entitiesToSave, saveOptions);
try {
var saveResultJson =
await saveOptions.DataService.PostAsync(saveOptions.ResourceName, saveBundleNode.Serialize());
var jn = JNode.DeserializeFrom(saveResultJson);
if (jn.HasValues("Errors") || jn.HasValues("errors"))
{
throw new SaveException(entityManager, jn);
}
return(ProcessSaveResult(entityManager, saveOptions, jn));
} catch (DataServiceRequestException dsre) {
var jn = JNode.DeserializeFrom(dsre.ResponseContent);
throw new SaveException(entityManager, jn);
} catch (HttpRequestException e) {
throw new SaveException(e.Message, e);
}
}
public SaveOptions(SaveOptions saveOptions)
{
ResourceName = saveOptions.ResourceName;
DataService = saveOptions.DataService;
Tag = saveOptions.Tag;
}
public async Task SaveWithEntityErrorsException() {
var em1 = await TestFns.NewEm(_serviceName);
// ok(true, "Skipped test - OData does not support server interception or alt resources");
// ok(true, "Skipped test - Mongo does not YET support server side validation");
var twoCusts = CreateParentAndChildren(em1);
var so = new SaveOptions("SaveWithEntityErrorsException", tag: "entityErrorsException");
try {
var sr0 = await em1.SaveChanges(so);
Assert.Fail("should not get here");
} catch (SaveException e) {
Assert.IsTrue(e.EntityErrors.Count == 2, "should have two errors");
var order1 = twoCusts.Cust1.Orders[0];
Assert.IsTrue(order1.EntityAspect.ValidationErrors.Count == 1);
var order2 = twoCusts.Cust1.Orders[1];
Assert.IsTrue(order2.EntityAspect.ValidationErrors.Count == 1);
Assert.IsTrue(order2.EntityAspect.ValidationErrors.First().Context.PropertyPath == "OrderID");
} catch (Exception e) {
Assert.Fail("should not get here - wrong exception" + e.Message);
}
// now save it properly
var sr1 = await em1.SaveChanges();
Assert.IsTrue(sr1.Entities.Count == 4);
}
public async Task SaveWithServerExit() {
var em1 = await TestFns.NewEm(_serviceName);
// ok(true, "Skipped test - OData does not support server interception or alt resources");
CreateParentAndChildren(em1);
var so = new SaveOptions("SaveWithExit", tag: "exit");
var sr0 = await em1.SaveChanges(so);
Assert.IsTrue(sr0.Entities.Count == 0);
}
public async Task CaptureAddlSavesDoneOnServer() {
var em1 = await TestFns.NewEm(_serviceName);
// ok(true, "Skipped test - OData does not support server interception or alt resources");
// ok(true, "N/A for Mongo - test not yet implemented - requires server side async call");
var q = new EntityQuery<Category>().Where(c => c.CategoryName.StartsWith("Beverage")).Expand("Products");
var r = await q.Execute(em1);
var category = r.First();
var products = category.Products;
var prices = products.Select(p => p.UnitPrice).ToList();
category.CategoryName = TestFns.MorphString(category.CategoryName);
var so = new SaveOptions(tag: "increaseProductPrice");
var sr = await em1.SaveChanges(null, so);
Assert.IsTrue(sr.Entities.Count == 13, "should have saved 13 entities + 1 category + 12 products");
Assert.IsTrue(sr.Entities.OfType<Product>().Count() == 12, "should be 12 products");
var ek = category.EntityAspect.EntityKey;
var em2 = new EntityManager(em1);
var r2 = await em2.ExecuteQuery(ek.ToQuery<Category>().Expand("Products"));
var cat2 = r2.First();
var products2 = cat2.Products;
var newPrices = products2.Select(p => p.UnitPrice).ToList();
Assert.IsTrue(!prices.SequenceEqual(newPrices), "prices should have changed");
}
public async Task ExceptionThrownOnServer() {
var em1 = await TestFns.NewEm(_serviceName);
// ok(true, "Skipped test - OData does not support server interception or alt resources");
var q = new EntityQuery<Order>().Take(1);
var orders = await em1.ExecuteQuery(q);
var order = orders.First();
order.Freight = order.Freight + .5m;
var so = new SaveOptions("SaveAndThrow", tag: "SaveAndThrow");
try {
var sr = await em1.SaveChanges(null, so);
Assert.Fail("should not get here");
} catch (SaveException se) {
Assert.IsTrue(se.Message.Contains("Deliberately thrown"), "message should be correct");
}
}
