public QueryDeferred(IQueryable query, Expression expression)
#endif
{
Expression = expression;
#if EF5 || EF6
// CREATE query from the deferred expression
var provider = ((IQueryable)query).Provider;
var createQueryMethod = provider.GetType().GetMethod("CreateQuery", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance, null, new[] { typeof(Expression), typeof(Type) }, null);
Query = (IQueryable <TResult>)createQueryMethod.Invoke(provider, new object[] { expression, typeof(TResult) });
#elif EFCORE
if (EFCoreHelper.IsVersion3x)
{
// EF Core 3.x
Query = new EntityQueryable <TResult>((IAsyncQueryProvider)query.Provider, Expression);
}
else
{
// EF Core 2.x
Query = new EntityQueryable <TResult>((IAsyncQueryProvider)query.Provider);
var expressionProperty = typeof(QueryableBase <>).MakeGenericType(typeof(TResult)).GetProperty("Expression", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
expressionProperty.SetValue((QueryableBase <TResult>)Query, expression);
}
#endif
}
public virtual ActionResult MultipleSelector(int page = 1, string parentpath = null, Guid?parentid = null)
{
if (!User.Identity.IsAuthenticated && !Metadata.AllowAnonymous)
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.ViewRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
IQueryable <TEntity> queryable = EntityQueryable.Query();
if (parentpath != null && parentid.HasValue)
{
try
{
queryable = EntityQueryable.InParent(queryable, parentpath, parentid.Value);
}
catch
{
return(new HttpStatusCodeResult(400));
}
}
var model = new EntityViewModel <TEntity>(EntityQueryable.OrderBy(queryable), page, 10);
if (Metadata.ParentProperty != null)
{
model.Parent = GetParentModel(parentid, 3);
}
model.Headers = Metadata.ViewProperties;
model.UpdateItems();
return(View(model));
}
public virtual ActionResult Edit(Guid id)
{
if (!EntityQueryable.Editable())
{
return(new HttpStatusCodeResult(403));
}
if (!User.Identity.IsAuthenticated && !Metadata.AllowAnonymous)
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.EditRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
TEntity item = EntityQueryable.GetEntity(id);
if (item == null)
{
return(new HttpStatusCodeResult(404));
}
var model = new EntityEditModel <TEntity>(item);
model.Properties = Metadata.EditProperties;
return(View(model));
}
public virtual async Task <EntityViewer> GetViewer()
{
EntityViewModel <TEntity> model = await GetViewModel(EntityQueryable.OrderBy(), 1, 20);
EntityViewer viewer = new EntityViewer();
viewer.Model = model;
return(viewer);
}
public virtual async Task <EntityMultipleSelector> GetMultipleSelector()
{
EntityViewModel <TEntity> model = await GetMultipleSelectorModel(EntityQueryable.OrderBy());
EntityMultipleSelector selector = new EntityMultipleSelector();
selector.Model = model;
return(selector);
}
public virtual async Task <bool> Update(TEntity entity)
{
if (entity.Index == Guid.Empty)
{
return(await EntityQueryable.AddAsync(entity));
}
else
{
return(await EntityQueryable.EditAsync(entity));
}
}
private EntityQueryable <TEntity> CreateEntityQueryable()
{
var queryable = new EntityQueryable <TEntity>(_context.GetDependencies().QueryProvider);
#pragma warning disable 618
if (_entityType.FindPrimaryKey() == null)
#pragma warning restore 618
{
queryable = (EntityQueryable <TEntity>)queryable.AsNoTracking();
}
return(queryable);
}
/// <summary>
/// The starting point for your query. Make sure <typeparamref name="TEntity"/> is available as a <see cref="DbSet{TEntity}"/> on your <see cref="DbContext"/>.
/// </summary>
/// <typeparam name="TEntity">The type of the entities.</typeparam>
/// <param name="contextFactory">The factory which can create the <see cref="DbContext"/>.</param>
/// <returns></returns>
public static IQueryable <TEntity> Set <TEntity>(this IDbContextFactory <DbContext> contextFactory)
where TEntity : class
{
if (contextFactory is null)
{
throw new System.ArgumentNullException(nameof(contextFactory));
}
var query = new EntityQueryable <TEntity>(
new QueryProvider(new DbContextFactoryQueryContext <DbContext, TEntity>(contextFactory)),
new EntityType <TEntity>());
return(query);
}
public virtual ActionResult Detail(Guid id)
{
if (!Metadata.ViewRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
TEntity item = EntityQueryable.GetEntity(id);
if (item == null)
{
return(new HttpStatusCodeResult(404));
}
var model = new EntityEditModel <TEntity>(item);
model.Properties = Metadata.DetailProperties;
return(View(model));
}
public void Setup()
{
_mappings = new TestMappingsRepository(new QueryableTests.NamedGraphsPersonMapping());
_baseUriSelectionPolicy = new Mock <IBaseUriSelectionPolicy>();
_baseUriSelectionPolicy.Setup(policy => policy.SelectBaseUri(It.IsAny <EntityId>())).Returns(new Uri("http://test/"));
_entitySource = new Mock <IEntitySource>(MockBehavior.Strict);
_store = new Mock <IEntityStore>(MockBehavior.Strict);
_store.Setup(store => store.AssertEntity(It.IsAny <EntityId>(), It.IsAny <IEnumerable <IEntityQuad> >()));
_entityContext = new Mock <IEntityContext>(MockBehavior.Strict);
_entityContext.Setup(context => context.Create <IPerson>(It.IsAny <EntityId>())).Returns((EntityId id) => CreatePersonEntity(id));
_entityContext.SetupGet(context => context.Mappings).Returns(_mappings);
_entityContext.SetupGet(context => context.BaseUriSelector).Returns(_baseUriSelectionPolicy.Object);
_persons = new EntityQueryable <IPerson>(_entityContext.Object, _entitySource.Object, _store.Object);
_testQueries = GetTestQueries();
}
public void Setup()
{
_mappings = new TestMappingsRepository(new QueryableTests.NamedGraphsPersonMapping());
_baseUriSelectionPolicy = new Mock<IBaseUriSelectionPolicy>();
_baseUriSelectionPolicy.Setup(policy => policy.SelectBaseUri(It.IsAny<EntityId>())).Returns(new Uri("http://test/"));
_entitySource = new Mock<IEntitySource>(MockBehavior.Strict);
_entityStore = new Mock<IEntityStore>(MockBehavior.Strict);
_entityStore.Setup(store => store.AssertEntity(It.IsAny<EntityId>(), It.IsAny<IEnumerable<EntityQuad>>()));
_entityContext = new Mock<IEntityContext>(MockBehavior.Strict);
_entityContext.Setup(context => context.Load<IPerson>(It.IsAny<EntityId>())).Returns((EntityId id) => CreatePersonEntity(id));
_entityContext.Setup(context => context.Store).Returns(_entityStore.Object);
_entityContext.SetupGet(context => context.Mappings).Returns(_mappings);
_entityContext.SetupGet(context => context.BaseUriSelector).Returns(_baseUriSelectionPolicy.Object);
_persons = new EntityQueryable<IPerson>(_entityContext.Object, _entitySource.Object, _mappings, _baseUriSelectionPolicy.Object);
_testQueries = GetTestQueries();
}
public static void LINQ_ToString()
{
using (var ctx = new WWWingsContext())
{
ctx.Log();
var q1 = from p in ctx.FlightSet
where p.FlightNo < 10
orderby p.FreeSeats
select p;
EntityQueryable <Flight> q1b = (EntityQueryable <Flight>)q1;
Console.WriteLine(q1.ToString()); // EF: returns SQL. EFC: returns type :-(
Console.WriteLine(q1b.ToString()); // EF: returns SQL. EFC: returns type :-(
}
}
public virtual ActionResult Remove(Guid id)
{
if (!EntityQueryable.Removeable())
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.RemoveRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
if (EntityQueryable.Remove(id))
{
return(new HttpStatusCodeResult(200));
}
else
{
return(new HttpStatusCodeResult(404));
}
}
public virtual ActionResult Create(Guid?parent = null)
{
if (!EntityQueryable.Addable())
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.AddRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
var model = new EntityEditModel <TEntity>(EntityQueryable.Create());
model.Item.Index = Guid.Empty;
model.Properties = Metadata.EditProperties;
if (parent != null && model.Metadata.ParentProperty != null)
{
dynamic parentContext = EntityBuilder.GetContext(model.Metadata.ParentProperty.Property.PropertyType);
object parentObj = parentContext.GetEntity(parent.Value);
model.Metadata.ParentProperty.Property.SetValue(model.Item, parentObj);
}
return(View("Edit", model));
}
public static IQueryable <T> FromSql <T>(this DbContext dbContext, RawSqlString sql, params object[] parameters)
{
// Argument check
if (dbContext == null)
{
throw new ArgumentNullException(nameof(dbContext));
}
// Add new query type if not exists
dbContext.TryAddQueryType <T>();
// Get the query provider service instance
var queryProvider = dbContext.GetDependencies().QueryProvider;
// Build query source. Actually query source is just used to determine the final result item type.
var querySource = new EntityQueryable <T>(queryProvider);
// Build LINQ expression for Entity Framework Core.
var expression = Expression.Call(null, FromSqlMethod.MakeGenericMethod(typeof(T)), querySource.Expression,
Expression.Constant(sql), Expression.Constant(parameters));
// Return result
return(queryProvider.CreateQuery <T>(expression));
}
public async Task ExecuteAsync_UsesSpecifiedContentType()
{
// Arrange
var executor = CreateExecutor();
var httpContext = new DefaultHttpContext();
var actionContext = new ActionContext()
{
HttpContext = httpContext
};
httpContext.Request.Headers[HeaderNames.Accept] = "application/json"; // This will not be used
httpContext.Response.ContentType = "application/json";
IList <Customer> customers = new List <Customer>();
IQueryable <Customer> customersQuery = customers.AsQueryable <Customer>();
CustomersContext db = new CustomersContext();
// db.Customers
Expression expression = Expression.Constant("abc");
EntityQueryable <Customer> value = new EntityQueryable <Customer>(db.GetDependencies().QueryProvider, expression);
var result = new ObjectResult(value)
{
ContentTypes = { "application/json", },
};
result.Formatters.Add(new TestJsonOutputFormatter());
// Act
await executor.ExecuteAsync(actionContext, result);
// Assert
// MediaTypeAssert.Equal("text/xml; charset=utf-8", httpContext.Response.ContentType);
}
public ExpressionTranslater(Expression root, EntityQueryable <T> entityQuery)
{
this.root = root;
this.EntityQuery = entityQuery;
}
/// <summary>Executes the given expression.</summary>
/// <exception cref="Exception">Thrown when an exception error condition occurs.</exception>
/// <typeparam name="TResult">Type of the result.</typeparam>
/// <param name="expression">The expression to execute.</param>
/// <returns>The object returned by the execution of the expression.</returns>
public TResult Execute <TResult>(Expression expression)
{
var methodCall = expression as MethodCallExpression;
if (methodCall == null)
{
throw new Exception(ExceptionMessage.GeneralException);
}
if (methodCall.Method.Name == "All" ||
methodCall.Method.Name == "Any" ||
methodCall.Method.Name == "Average" ||
methodCall.Method.Name == "Contains" ||
methodCall.Method.Name == "Count" ||
methodCall.Method.Name == "LongCount" ||
methodCall.Method.Name == "Max" ||
methodCall.Method.Name == "Min" ||
methodCall.Method.Name == "SequenceEqual" ||
methodCall.Method.Name == "Sum")
{
return(OriginalProvider.Execute <TResult>(expression));
}
QueryIncludeOptimizedIncludeSubPath.RemoveLazyChild(CurrentQueryable);
var currentQuery = CurrentQueryable;
var currentMethod = methodCall.Method.GetGenericMethodDefinition();
// CHECK if the internal expression can be supported
var isExpressionSupported = false;
var firstExpression = methodCall.Arguments.FirstOrDefault(x => x.Type.IsSubclassOf(typeof(Expression)));
if (firstExpression != null && methodCall.Arguments.Count == 2)
{
var quoteExpression = ((UnaryExpression)firstExpression).Operand;
var lambdaExpression = quoteExpression as LambdaExpression;
if (lambdaExpression != null)
{
if (lambdaExpression.Type == typeof(Func <,>).MakeGenericType(currentQuery.ElementType, typeof(bool)))
{
var method = typeof(Queryable).GetMethods().First(x => x.Name == "Where" && x.GetParameters()[1].ParameterType.GetGenericArguments()[0].GetGenericArguments().Length == 2);
var methodGeneric = method.MakeGenericMethod(currentQuery.ElementType);
currentQuery = (QueryIncludeOptimizedParentQueryable <T>)methodGeneric.Invoke(null, new object[] { currentQuery, lambdaExpression });
currentMethod = typeof(Queryable).GetMethods().FirstOrDefault(x => x.Name == currentMethod.Name && x.GetParameters().Length == 1);
isExpressionSupported = currentMethod != null;
}
}
}
if (firstExpression != null && !isExpressionSupported)
{
throw new Exception(ExceptionMessage.QueryIncludeOptimized_ArgumentExpression);
}
// CREATE the new query by selecting included entities in an anonymous type
var newQuery = currentQuery;
// REPLACE the first argument with the new query expression
var arguments = methodCall.Arguments.ToList();
arguments[0] = newQuery.Expression;
// REMOVE the last argument if a "Predicate" method was previously used
if (firstExpression != null)
{
arguments.RemoveAt(1);
}
// RESOLE parent queries using .FutureValue();
#if EFCORE_3X
var immediateQuery = new EntityQueryable <TResult>((IAsyncQueryProvider)OriginalProvider, expression);
#elif EF5 || EF6
var objectQuery = CurrentQueryable.OriginalQueryable.GetObjectQuery();
// GET provider
// because IQueryable.Provider call : ObjectQueryProvider and now that work for EF5
var objectQueryProviderField = typeof(ObjectQuery).GetProperty("System.Linq.IQueryable.Provider", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
var provider = (IQueryProvider)objectQueryProviderField.GetValue(objectQuery, null);
// CREATE query from the expression
var createQueryMethod = provider.GetType().GetMethod("CreateQuery", BindingFlags.NonPublic | BindingFlags.Instance, null, new[] { typeof(Expression) }, null);
createQueryMethod = createQueryMethod.MakeGenericMethod(typeof(TResult));
var immediateQuery = (ObjectQuery <T>)createQueryMethod.Invoke(provider, new object[] { expression });
#endif
object value = null;
if (QueryIncludeOptimizedManager.AllowQueryBatch)
{
var futureValue = immediateQuery.FutureValue();
// RESOLVE child queries using .Future()
{
// MODIFY query if necessary
#if EF5 || EF6
var objectContext = CurrentQueryable.OriginalQueryable.GetObjectQuery().Context;
var keyMembers = objectContext.GetEntitySet <T>().ElementType.KeyMembers;
var keyNames = ((IEnumerable <EdmMember>)keyMembers).Select(x => x.Name).ToArray();
#elif EFCORE
var context = currentQuery.OriginalQueryable.GetDbContext();
var keyNames = context.Model.FindEntityType(typeof(TResult).DisplayName(true))
.GetKeys().ToList()[0]
.Properties.Select(x => x.Name).ToArray();
#endif
var currentNewQuery = methodCall.Method.Name == "First" || methodCall.Method.Name == "FirstOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Take(1) :
methodCall.Method.Name == "Last" || methodCall.Method.Name == "LastOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Reverse().Take(1) :
currentQuery;
currentQuery.CreateQueryable(currentNewQuery);
}
value = futureValue.Value;
}
else
{
#if EFCORE_3X
value = immediateQuery.FutureValue().Value;
#else
value = immediateQuery.Execute(objectQuery.MergeOption).FirstOrDefault();
#endif
// RESOLVE child queries using .Future()
{
// MODIFY query if necessary
#if EF5 || EF6
var objectContext = CurrentQueryable.OriginalQueryable.GetObjectQuery().Context;
var keyMembers = ((dynamic)objectContext).CreateObjectSet <T>().EntitySet.ElementType.KeyMembers;
var keyNames = ((IEnumerable <EdmMember>)keyMembers).Select(x => x.Name).ToArray();
#elif EFCORE
var context = currentQuery.OriginalQueryable.GetDbContext();
var keyNames = context.Model.FindEntityType(typeof(TResult).DisplayName(true))
.GetKeys().ToList()[0]
.Properties.Select(x => x.Name).ToArray();
#endif
var currentNewQuery = methodCall.Method.Name == "First" || methodCall.Method.Name == "FirstOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Take(1) :
methodCall.Method.Name == "Last" || methodCall.Method.Name == "LastOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Reverse().Take(1) :
currentQuery;
currentQuery.CreateQueryable(currentNewQuery);
}
}
// EXECUTE the new expression
//var value = QueryIncludeOptimizedManager.AllowQueryBatch ? immediateQuery.FutureValue().Value : immediateQuery.FirstOrDefault();
// CHECK if a value has been returned
if (value == null)
{
return((TResult)(object)null);
}
#if EF6
// FIX lazy loading
QueryIncludeOptimizedLazyLoading.SetLazyLoaded(value, CurrentQueryable.Childs);
#endif
// FIX null collection
QueryIncludeOptimizedNullCollection.NullCollectionToEmpty(value, CurrentQueryable.Childs);
#if EF5 || EF6
return((TResult)(object)value);
#elif EFCORE
return((TResult)value);
#endif
}
protected virtual Task <EntityViewModel <TEntity> > GetViewModel(IQueryable <TEntity> queryable, int page, int size)
{
return(Task.Run <EntityViewModel <TEntity> >(() =>
{
EntityViewModel <TEntity> model = new EntityViewModel <TEntity>(queryable, page, size);
model.Headers = Metadata.ViewProperties;
EntityViewButton createButton = new EntityViewButton();
createButton.Name = "Create";
createButton.GetInvokeDelegate = new EntityViewButtonCommandDelegate(viewer =>
{
return new Task(async() =>
{
var item = EntityQueryable.Create();
bool?result = null;
await viewer.Dispatcher.Invoke(async() =>
{
viewer.IsLoading = true;
var editor = await GetEditor(item);
result = editor.ShowDialog();
});
if (result == true)
{
await Update(item);
model.UpdateTotalPage();
model.Items = model.Items.Concat(new TEntity[] { item }).ToArray();
}
viewer.Dispatcher.Invoke(() =>
{
viewer.IsLoading = false;
});
});
});
model.ViewButtons = new IViewButton[] { createButton };
EntityItemButton editButton = new EntityItemButton();
editButton.Name = "Edit";
editButton.GetInvokeDelegate = new EntityItemButtonCommandDelegate((viewer, entity) =>
{
return new Task(async() =>
{
var item = (TEntity)entity;
bool?result = null;
await viewer.Dispatcher.Invoke(async() =>
{
viewer.IsLoading = true;
var editor = await GetEditor(item);
result = editor.ShowDialog();
});
if (result == true)
{
await Update(item);
}
viewer.Dispatcher.Invoke(() =>
{
viewer.IsLoading = false;
});
});
});
EntityItemButton removeButton = new EntityItemButton();
removeButton.Name = "Remove";
removeButton.GetInvokeDelegate = new EntityItemButtonCommandDelegate((viewer, entity) =>
{
return new Task(async() =>
{
viewer.Dispatcher.Invoke(() =>
{
viewer.IsLoading = true;
});
await EntityQueryable.RemoveAsync(entity.Index);
model.Items = await EntityQueryable.ToArrayAsync(queryable.Skip(page).Take(size));
viewer.Dispatcher.Invoke(() =>
{
viewer.IsLoading = false;
});
});
});
model.ItemButtons = new IEntityViewButton[] { editButton, removeButton };
return model;
}));
}
IEnumerator IEnumerable.GetEnumerator() => EntityQueryable.GetEnumerator();
IEnumerator <TEntity> IEnumerable <TEntity> .GetEnumerator() => EntityQueryable.GetEnumerator();
/// <summary>Executes the given expression.</summary>
/// <exception cref="Exception">Thrown when an exception error condition occurs.</exception>
/// <typeparam name="TResult">Type of the result.</typeparam>
/// <param name="expression">The expression to execute.</param>
/// <returns>The object returned by the execution of the expression.</returns>
public TResult Execute <TResult>(Expression expression)
{
var methodCall = expression as MethodCallExpression;
if (methodCall == null)
{
throw new Exception(ExceptionMessage.GeneralException);
}
var currentQuery = CurrentQueryable;
var currentMethod = methodCall.Method.GetGenericMethodDefinition();
// CHECK if the internal expression can be supported]
var isExpressionSupported = false;
var firstExpression = methodCall.Arguments.FirstOrDefault(x => x.Type.IsSubclassOf(typeof(Expression)));
if (firstExpression != null && methodCall.Arguments.Count == 2)
{
var quoteExpression = ((UnaryExpression)firstExpression).Operand;
var lambdaExpression = quoteExpression as LambdaExpression;
if (lambdaExpression != null)
{
if (lambdaExpression.Type == typeof(Func <,>).MakeGenericType(currentQuery.ElementType, typeof(bool)))
{
var method = typeof(Queryable).GetMethods().First(x => x.Name == "Where" && x.GetParameters()[1].ParameterType.GetGenericArguments()[0].GetGenericArguments().Length == 2);
var methodGeneric = method.MakeGenericMethod(currentQuery.ElementType);
currentQuery = (QueryIncludeOptimizedParentQueryable <T>)methodGeneric.Invoke(null, new object[] { currentQuery, lambdaExpression });
currentMethod = typeof(Queryable).GetMethods().FirstOrDefault(x => x.Name == currentMethod.Name && x.GetParameters().Length == 1);
isExpressionSupported = currentMethod != null;
}
}
}
if (firstExpression != null && !isExpressionSupported)
{
throw new Exception(ExceptionMessage.QueryIncludeOptimized_ArgumentExpression);
}
// CREATE the new query by selecting included entities in an anonymous type
var newQuery = currentQuery;
// REPLACE the first argument with the new query expression
var arguments = methodCall.Arguments.ToList();
arguments[0] = newQuery.Expression;
// REMOVE the last argument if a "Predicate" method was previously used
if (firstExpression != null)
{
arguments.RemoveAt(1);
}
// RESOLVE child queries using .Future()
{
// MODIFY query if necessary
#if EF5 || EF6
var objectContext = CurrentQueryable.OriginalQueryable.GetObjectQuery().Context;
var keyMembers = ((dynamic)objectContext).CreateObjectSet <T>().EntitySet.ElementType.KeyMembers;
var keyNames = ((IEnumerable <EdmMember>)keyMembers).Select(x => x.Name).ToArray();
#elif EF7
var context = currentQuery.OriginalQueryable.GetDbContext();
var keyNames = context.Model.FindEntityType(typeof(TResult).DisplayName(true))
.GetKeys().ToList()[0]
.Properties.Select(x => x.Name).ToArray();
#endif
var currentNewQuery = methodCall.Method.Name == "First" || methodCall.Method.Name == "FirstOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Take(1) :
methodCall.Method.Name == "Last" || methodCall.Method.Name == "LastOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Reverse().Take(1) :
currentQuery;
currentQuery.CreateQueryable(currentNewQuery);
}
// RESOLE parent queries using .FutureValue();
#if EF5 || EF6
var objectQuery = CurrentQueryable.OriginalQueryable.GetObjectQuery();
// GET provider
var objectQueryProviderField = typeof(ObjectQuery).GetField("_provider", BindingFlags.NonPublic | BindingFlags.Instance);
var provider = (IQueryProvider)objectQueryProviderField.GetValue(objectQuery);
// CREATE query from the expression
var createQueryMethod = provider.GetType().GetMethod("CreateQuery", BindingFlags.NonPublic | BindingFlags.Instance, null, new[] { typeof(Expression) }, null);
createQueryMethod = createQueryMethod.MakeGenericMethod(typeof(TResult));
var immediateQuery = (ObjectQuery <T>)createQueryMethod.Invoke(provider, new object[] { expression });
#elif EF7
var immediateQuery = new EntityQueryable <TResult>((IAsyncQueryProvider)OriginalProvider);
var expressionProperty = typeof(QueryableBase <>).MakeGenericType(typeof(TResult)).GetProperty("Expression", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
expressionProperty.SetValue(immediateQuery, expression);
#endif
// EXECUTE the new expression
var futureValue = immediateQuery.FutureValue();
var value = futureValue.Value;
// CHECK if a value has been returned
if (value == null)
{
return((TResult)(object)null);
}
#if EF5 || EF6
return((TResult)(object)value);
#elif EF7
return((TResult)value);
#endif
}
public DbSet([NotNull] DbContext context)
: base(Check.NotNull(context, "context"))
{
_entityQueryable
= new EntityQueryable <TEntity>(new EntityQueryExecutor(context));
}
/// <summary> /// This is an internal API that supports the Entity Framework Core infrastructure and not subject to /// the same compatibility standards as public APIs. It may be changed or removed without notice in /// any release. You should only use it directly in your code with extreme caution and knowing that /// doing so can result in application failures when updating to a new Entity Framework Core release. /// </summary> IAsyncEnumerator <TEntity> IAsyncEnumerable <TEntity> .GetAsyncEnumerator(CancellationToken cancellationToken) => EntityQueryable.GetAsyncEnumerator(cancellationToken);
public virtual ActionResult Update(Guid id)
{
TEntity entity;
if (id == Guid.Empty)
{
if (!EntityQueryable.Addable())
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.AddRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
entity = EntityQueryable.Create();
}
else
{
if (!EntityQueryable.Editable())
{
return(new HttpStatusCodeResult(403));
}
if (!Metadata.EditRoles.All(t => User.IsInRole(t)))
{
return(new HttpStatusCodeResult(403));
}
entity = EntityQueryable.GetEntity(id);
if (entity == null)
{
return(new HttpStatusCodeResult(404));
}
}
var properties = Metadata.Properties.Where(t => !t.IsHiddenOnEdit).ToArray();
for (int i = 0; i < properties.Length; i++)
{
PropertyMetadata propertyMetadata = properties[i];
if (propertyMetadata.Type == ComponentModel.DataAnnotations.CustomDataType.File || propertyMetadata.Type == ComponentModel.DataAnnotations.CustomDataType.Image)
{
#region File Path Value
if (!Request.Files.AllKeys.Contains(propertyMetadata.Property.Name))
{
continue;
}
if (!(this is IFileController <TEntity>))
{
throw new NotSupportedException("Controller doesn't support upload file.");
}
((IFileController <TEntity>) this).SaveFileToProperty(entity, propertyMetadata, Request.Files[propertyMetadata.Property.Name]);
#endregion
}
else
{
#region Property Value
if (!Request.Form.AllKeys.Contains(propertyMetadata.Property.Name))
{
if (id == Guid.Empty && propertyMetadata.IsRequired)
{
Response.StatusCode = 400;
return(Content(propertyMetadata.Name + "为必填项"));
}
continue;
}
string originValue = Request.Form[propertyMetadata.Property.Name];
if (string.IsNullOrEmpty(originValue) && propertyMetadata.Property.PropertyType != typeof(string) && propertyMetadata.IsRequired)
{
Response.StatusCode = 400;
return(Content(propertyMetadata.Name + "为必填项"));
}
//Type type = propertyMetadata.Property.PropertyType;
//if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
// type = type.GetGenericArguments()[0];
TypeConverter converter = EntityValueConverter.GetConverter(propertyMetadata);
if (converter == null)
{
if (propertyMetadata.Property.PropertyType.IsGenericType && propertyMetadata.Property.PropertyType.GetGenericTypeDefinition() == typeof(ICollection <>))
{
converter = new Converter.CollectionConverter();
}
else if (propertyMetadata.Property.PropertyType.IsEnum)
{
converter = new EnumConverter(propertyMetadata.Property.PropertyType);
}
else
if (propertyMetadata.Type != ComponentModel.DataAnnotations.CustomDataType.Password)
{
throw new NotSupportedException("Type of \"" + propertyMetadata.Property.PropertyType.Name + "\" converter not found.");
}
}
if (propertyMetadata.Type == ComponentModel.DataAnnotations.CustomDataType.Password && entity is IPassword)
{
object v = propertyMetadata.Property.GetValue(entity);
if (v == null || originValue != v.ToString())
{
((IPassword)entity).SetPassword(originValue);
}
}
else
{
EntityValueConverterContext context = new EntityValueConverterContext(EntityBuilder.DescriptorContext, propertyMetadata);
object value = converter.ConvertFrom(context, null, originValue);
if (converter.GetType() == typeof(Converter.CollectionConverter))
{
object collection = propertyMetadata.Property.GetValue(entity);
((dynamic)collection).Clear();
var addMethod = collection.GetType().GetMethod("Add");
object[] array = (object[])value;
for (int a = 0; a < array.Length; a++)
{
addMethod.Invoke(collection, new object[] { array[a] });
}
}
else
{
propertyMetadata.Property.SetValue(entity, value);
}
}
#endregion
}
}
var validateResult = entity.Validate(null);
if (validateResult.Count() != 0)
{
Response.StatusCode = 400;
return(Content(new string(validateResult.SelectMany(t => t.ErrorMessage += "/r/n").ToArray())));
}
bool result;
if (id == Guid.Empty)
{
result = EntityQueryable.Add(entity);
}
else
{
result = EntityQueryable.Edit(entity);
}
if (result)
{
return(Content(entity.Index.ToString()));
}
else
{
Response.StatusCode = 400;
return(Content("未知"));
}
}
private MainFromClause CreateWithEntityQueryable <T>()
{
var queryable = new EntityQueryable <T>(new EntityQueryExecutor(Mock.Of <DbContext>()));
return(new MainFromClause("s", typeof(T), Expression.Constant(queryable)));
}
protected virtual async Task <EntityEditModel <TEntity> > GetEditModel(Guid id)
{
var item = await EntityQueryable.GetEntityAsync(id);
return(await GetEditModel(item));
}
public DbQueryProvider(EntityQueryable <T> entityQuery)
: base()
{
this.entityQuery = entityQuery;
}
/// <summary>Executes the given expression.</summary>
/// <exception cref="Exception">Thrown when an exception error condition occurs.</exception>
/// <typeparam name="TResult">Type of the result.</typeparam>
/// <param name="expression">The expression to execute.</param>
/// <returns>The object returned by the execution of the expression.</returns>
public TResult Execute <TResult>(Expression expression)
{
var methodCall = expression as MethodCallExpression;
if (methodCall == null)
{
throw new Exception(ExceptionMessage.GeneralException);
}
if (methodCall.Method.Name == "All" ||
methodCall.Method.Name == "Any" ||
methodCall.Method.Name == "Average" ||
methodCall.Method.Name == "Contains" ||
methodCall.Method.Name == "Count" ||
methodCall.Method.Name == "LongCount" ||
methodCall.Method.Name == "Max" ||
methodCall.Method.Name == "Min" ||
methodCall.Method.Name == "SequenceEqual" ||
methodCall.Method.Name == "Sum")
{
return(OriginalProvider.Execute <TResult>(expression));
}
QueryIncludeFilterIncludeSubPath.RemoveLazyChild(CurrentQueryable);
var currentQuery = CurrentQueryable;
var currentMethod = methodCall.Method.GetGenericMethodDefinition();
// CHECK if the internal expression can be supported
var isExpressionSupported = false;
var firstExpression = methodCall.Arguments.FirstOrDefault(x => x.Type.IsSubclassOf(typeof(Expression)));
if (firstExpression != null && methodCall.Arguments.Count == 2)
{
var quoteExpression = ((UnaryExpression)firstExpression).Operand;
var lambdaExpression = quoteExpression as LambdaExpression;
if (lambdaExpression != null)
{
if (lambdaExpression.Type == typeof(Func <,>).MakeGenericType(currentQuery.ElementType, typeof(bool)))
{
var method = typeof(Queryable).GetMethods().First(x => x.Name == "Where" && x.GetParameters()[1].ParameterType.GetGenericArguments()[0].GetGenericArguments().Length == 2);
var methodGeneric = method.MakeGenericMethod(currentQuery.ElementType);
currentQuery = (QueryIncludeFilterParentQueryable <T>)methodGeneric.Invoke(null, new object[] { currentQuery, lambdaExpression });
currentMethod = typeof(Queryable).GetMethods().FirstOrDefault(x => x.Name == currentMethod.Name && x.GetParameters().Length == 1);
isExpressionSupported = currentMethod != null;
}
}
}
if (firstExpression != null && !isExpressionSupported)
{
throw new Exception(ExceptionMessage.QueryIncludeFilter_ArgumentExpression);
}
// CREATE the new query by selecting included entities in an anonymous type
var newQuery = currentQuery;
// REPLACE the first argument with the new query expression
var arguments = methodCall.Arguments.ToList();
arguments[0] = newQuery.Expression;
// REMOVE the last argument if a "Predicate" method was previously used
if (firstExpression != null)
{
arguments.RemoveAt(1);
}
#if EFCORE_3X
// RESOLE parent queries using .FutureValue();
var immediateQuery = new EntityQueryable <TResult>((IAsyncQueryProvider)OriginalProvider, expression);
#else
// RESOLE parent queries using .FutureValue();
var immediateQuery = new EntityQueryable <TResult>((IAsyncQueryProvider)OriginalProvider);
var expressionProperty = typeof(QueryableBase <>).MakeGenericType(typeof(TResult)).GetProperty("Expression", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
expressionProperty.SetValue(immediateQuery, expression);
#endif
object value = null;
DbContext context = null;
if (currentQuery.OriginalQueryable.IsInMemoryQueryContext())
{
context = currentQuery.OriginalQueryable.GetInMemoryContext();
}
else
{
// MODIFY query if necessary
context = currentQuery.OriginalQueryable.GetDbContext();
}
if (QueryIncludeFilterManager.AllowQueryBatch)
{
var futureValue = immediateQuery.FutureValue();
// RESOLVE child queries using .Future()
{
// MODIFY query if necessary
var keyNames = context.Model.FindEntityType(typeof(TResult).DisplayName(true))
.GetKeys().ToList()[0]
.Properties.Select(x => x.Name).ToArray();
var currentNewQuery = methodCall.Method.Name == "First" || methodCall.Method.Name == "FirstOrDefault" ? currentQuery.AddToRootOrAppendOrderBy(keyNames).Take(1) :
methodCall.Method.Name == "Last" || methodCall.Method.Name == "LastOrDefault" ? currentQuery.AddToRootOrAppendOrderBy(keyNames).Reverse().Take(1) :
currentQuery;
currentQuery.CreateQueryable(currentNewQuery);
}
value = futureValue.Value;
}
else
{
// TODO: Find a better way
value = immediateQuery.FutureValue().Value;
//value = immediateQuery.Execute(objectQuery.MergeOption).FirstOrDefault();
// RESOLVE child queries using .Future()
{
// MODIFY query if necessary
var keyNames = context.Model.FindEntityType(typeof(TResult).DisplayName(true))
.GetKeys().ToList()[0]
.Properties.Select(x => x.Name).ToArray();
var currentNewQuery = methodCall.Method.Name == "First" || methodCall.Method.Name == "FirstOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Take(1) :
methodCall.Method.Name == "Last" || methodCall.Method.Name == "LastOrDefault" ?
currentQuery.AddToRootOrAppendOrderBy(keyNames).Reverse().Take(1) :
currentQuery;
currentQuery.CreateQueryable(currentNewQuery);
}
}
// EXECUTE the new expression
//var value = QueryIncludeFilterManager.AllowQueryBatch ? immediateQuery.FutureValue().Value : immediateQuery.FirstOrDefault();
// CHECK if a value has been returned
if (value == null)
{
return((TResult)(object)null);
}
// FIX null collection
QueryIncludeFilterNullCollection.NullCollectionToEmpty(value, CurrentQueryable.Childs);
return((TResult)value);
}
