C# EntityEntry.GetOriginalEntityValue方法代码示例

            public void Adds_original_value_for_scalar_property_when_some_other_original_values_exist()
            {
                var mockMemberMetadata1 = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata1.Setup(m => m.IsComplex).Returns(false);
                var mockMemberMetadata2 = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata2.Setup(m => m.IsComplex).Returns(false);

                var mockMetadata = new Mock<StateManagerTypeMetadata>();
                mockMetadata.Setup(m => m.Member(1)).Returns(mockMemberMetadata1.Object);
                mockMetadata.Setup(m => m.Member(2)).Returns(mockMemberMetadata2.Object);

                var entry = new EntityEntry();

                entry.SetOriginalEntityValue(mockMetadata.Object, 2, new object(), 7);

                var userObject = new object();
                var value = new object();

                entry.SetOriginalEntityValue(mockMetadata.Object, 1, userObject, value);

                Assert.Equal(1, entry.FindOriginalValueIndex(mockMemberMetadata1.Object, userObject));
                Assert.Same(
                    value,
                    entry.GetOriginalEntityValue(mockMetadata.Object, 1, userObject, ObjectStateValueRecord.OriginalReadonly));
            }

        /// <summary>
        ///     Creates an EntityKey for a principal entity based on the foreign key values contained
        ///     in this entity.  This implies that this entity is at the dependent end of the relationship.
        /// </summary>
        /// <param name="dependentEntry"> The EntityEntry for the dependent that contains the FK </param>
        /// <param name="constraint"> The constraint that describes this FK relationship </param>
        /// <param name="principalEntitySet"> The entity set at the principal end of the the relationship </param>
        /// <param name="useOriginalValues"> If true then the key will be constructed from the original FK values </param>
        /// <returns> The key, or null if any value in the key is null </returns>
        public static EntityKey CreateKeyFromForeignKeyValues(
            EntityEntry dependentEntry, ReferentialConstraint constraint, EntitySet principalEntitySet, bool useOriginalValues)
        {
            // Build the key values.  If any part of the key is null, then the entire key
            // is considered null.
            var dependentProps = constraint.ToProperties;
            var numValues = dependentProps.Count;
            if (numValues == 1)
            {
                var keyValue = useOriginalValues
                                   ? dependentEntry.GetOriginalEntityValue(dependentProps.First().Name)
                                   : dependentEntry.GetCurrentEntityValue(dependentProps.First().Name);
                return keyValue == DBNull.Value ? null : new EntityKey(principalEntitySet, keyValue);
            }

            // Note that the properties in the principal entity set may be in a different order than
            // they appear in the constraint.  Therefore, we create name value mappings to ensure that
            // the correct values are associated with the correct properties.
            // Unfortunately, there is not way to call the public EntityKey constructor that takes pairs
            // because the internal "object" constructor hides it.  Even this doesn't work:
            // new EntityKey(principalEntitySet, (IEnumerable<KeyValuePair<string, object>>)keyValues)
            var keyNames = principalEntitySet.ElementType.KeyMemberNames;
            Debug.Assert(keyNames.Length == numValues, "Number of entity set key names does not match constraint names");
            var values = new object[numValues];
            var principalProps = constraint.FromProperties;
            for (var i = 0; i < numValues; i++)
            {
                var value = useOriginalValues
                                ? dependentEntry.GetOriginalEntityValue(dependentProps[i].Name)
                                : dependentEntry.GetCurrentEntityValue(dependentProps[i].Name);
                if (value == DBNull.Value)
                {
                    return null;
                }
                var keyIndex = Array.IndexOf(keyNames, principalProps[i].Name);
                Debug.Assert(keyIndex >= 0 && keyIndex < numValues, "Could not find constraint prop name in entity set key names");
                values[keyIndex] = value;
            }
            return new EntityKey(principalEntitySet, values);
        }

            public void Updates_original_value_for_scalar_property()
            {
                var mockMemberMetadata = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata.Setup(m => m.IsComplex).Returns(false);

                var mockMetadata = new Mock<StateManagerTypeMetadata>();
                mockMetadata.Setup(m => m.Member(3)).Returns(mockMemberMetadata.Object);

                var entry = new EntityEntry();

                var userObject = new object();

                entry.SetOriginalEntityValue(mockMetadata.Object, 3, userObject, new object());

                var value = new object();
                entry.SetOriginalEntityValue(mockMetadata.Object, 3, userObject, value);

                Assert.Equal(0, entry.FindOriginalValueIndex(mockMemberMetadata.Object, userObject));
                Assert.Same(
                    value,
                    entry.GetOriginalEntityValue(mockMetadata.Object, 3, userObject, ObjectStateValueRecord.OriginalReadonly));
            }

            public void Adds_new_values_to_list_if_not_found_index_is_passed_otherwise_updates_current_entry()
            {
                var entry = new EntityEntry();

                var userObject1 = new object();
                var metadata1 = new StateManagerMemberMetadata();
                entry.AddOriginalValueAt(-1, metadata1, userObject1, 1);

                var userObject2 = new object();
                var metadata2 = new StateManagerMemberMetadata();
                entry.AddOriginalValueAt(-1, metadata2, userObject2, 2);

                var userObject3 = new object();
                var metadata3 = new StateManagerMemberMetadata();
                entry.AddOriginalValueAt(-1, metadata3, userObject3, 3);

                Assert.Equal(0, entry.FindOriginalValueIndex(metadata1, userObject1));
                Assert.Equal(1, entry.FindOriginalValueIndex(metadata2, userObject2));
                Assert.Equal(2, entry.FindOriginalValueIndex(metadata3, userObject3));

                Assert.Equal(1, entry.GetOriginalEntityValue(null, metadata1, 0, userObject1, ObjectStateValueRecord.OriginalReadonly, 0));
                Assert.Equal(2, entry.GetOriginalEntityValue(null, metadata2, 0, userObject2, ObjectStateValueRecord.OriginalReadonly, 0));
                Assert.Equal(3, entry.GetOriginalEntityValue(null, metadata3, 0, userObject3, ObjectStateValueRecord.OriginalReadonly, 0));

                entry.AddOriginalValueAt(1, metadata2, userObject2, 7);

                Assert.Equal(1, entry.FindOriginalValueIndex(metadata2, userObject2));
                Assert.Equal(7, entry.GetOriginalEntityValue(null, metadata2, 0, userObject2, ObjectStateValueRecord.OriginalReadonly, 0));
            }

            public void Traverses_through_multiple_levels_of_complex_properties_for_changed_case()
            {
                var userObject = new object();
                var oldComplexObject1 = new object();
                var oldComplexObject2 = new object();
                var newComplexObject = new object();
                var newValue = new object();
                var newValue2 = new object();

                var complexType1 = new Mock<EdmType>().Object;
                var complexMetadata1 = CreateComplexMetadata(userObject, oldComplexObject1, complexType1);

                var complexType2 = new Mock<EdmType>().Object;
                var complexMetadata2 = CreateComplexMetadata(newComplexObject, oldComplexObject2, complexType2, oldComplexObject1, 0);

                var scalarMetadata = CreateNestedScalarMetadata(oldComplexObject2, newValue);

                var mockStateManager = new Mock<ObjectStateManager>();
                mockStateManager
                    .Setup(m => m.GetOrAddStateManagerTypeMetadata(complexType1))
                    .Returns(complexMetadata2);
                mockStateManager
                    .Setup(m => m.GetOrAddStateManagerTypeMetadata(complexType2))
                    .Returns(scalarMetadata);

                var entry = new EntityEntry(mockStateManager.Object);

                entry.AddOriginalValueAt(-1, scalarMetadata.Member(0), oldComplexObject2, newValue2);

                entry.ExpandComplexTypeAndAddValues(complexMetadata1.Member(3), oldComplexObject1, newComplexObject, false);

                Assert.Equal(0, entry.FindOriginalValueIndex(scalarMetadata.Member(0), oldComplexObject2));
                Assert.Same(
                    newValue2,
                    entry.GetOriginalEntityValue(scalarMetadata, 0, oldComplexObject2, ObjectStateValueRecord.OriginalReadonly));
            }

            public void Gets_current_value_if_original_value_not_set()
            {
                var userObject = new object();
                var currentValue = new object();

                var mockMemberMetadata = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata.Setup(m => m.IsComplex).Returns(false);
                mockMemberMetadata.Setup(m => m.GetValue(userObject)).Returns(currentValue);

                var mockMetadata = new Mock<StateManagerTypeMetadata>();
                mockMetadata.Setup(m => m.Member(3)).Returns(mockMemberMetadata.Object);

                var entry = new EntityEntry();

                Assert.Same(
                    currentValue,
                    entry.GetOriginalEntityValue(mockMetadata.Object, 3, userObject, ObjectStateValueRecord.OriginalReadonly));
            }

            public void Gets_DBNull_for_null_original_value()
            {
                var mockMemberMetadata = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata.Setup(m => m.IsComplex).Returns(false);

                var mockMetadata = new Mock<StateManagerTypeMetadata>();
                mockMetadata.Setup(m => m.Member(3)).Returns(mockMemberMetadata.Object);

                var entry = new EntityEntry();

                var userObject = new object();

                entry.SetOriginalEntityValue(mockMetadata.Object, 3, userObject, null);

                Assert.Same(
                    DBNull.Value,
                    entry.GetOriginalEntityValue(mockMetadata.Object, 3, userObject, ObjectStateValueRecord.OriginalReadonly));
            }

            public void Updates_original_value_for_complex_property()
            {
                var userObject = new object();
                var oldComplexObject = new object();
                var newComplexObject = new object();
                var newValue = new object();

                var complexMetadata = CreateComplexMetadata(userObject, oldComplexObject);
                var scalarMetadata = CreateNestedScalarMetadata(newComplexObject, newValue);

                var mockStateManager = new Mock<ObjectStateManager>();
                mockStateManager
                    .Setup(m => m.GetOrAddStateManagerTypeMetadata(It.IsAny<EdmType>()))
                    .Returns(scalarMetadata);

                var entry = new EntityEntry(mockStateManager.Object);

                entry.SetOriginalEntityValue(complexMetadata, 3, userObject, newComplexObject);

                var newValue2 = new object();
                Mock.Get(scalarMetadata.Member(0)).Setup(m => m.GetValue(newComplexObject)).Returns(newValue2);

                entry.SetOriginalEntityValue(complexMetadata, 3, userObject, newComplexObject);

                Assert.Equal(0, entry.FindOriginalValueIndex(scalarMetadata.Member(0), oldComplexObject));
                Assert.Same(
                    newValue,
                    entry.GetOriginalEntityValue(scalarMetadata, 0, oldComplexObject, ObjectStateValueRecord.OriginalReadonly));
            }

            public void Adds_original_value_for_complex_property_when_some_other_original_values_exist()
            {
                var mockMemberMetadata1 = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata1.Setup(m => m.IsComplex).Returns(false);
                var mockMemberMetadata2 = new Mock<StateManagerMemberMetadata>();
                mockMemberMetadata2.Setup(m => m.IsComplex).Returns(false);

                var mockMetadata = new Mock<StateManagerTypeMetadata>();
                mockMetadata.Setup(m => m.Member(1)).Returns(mockMemberMetadata1.Object);
                mockMetadata.Setup(m => m.Member(2)).Returns(mockMemberMetadata2.Object);

                var userObject = new object();
                var oldComplexObject = new object();
                var newComplexObject = new object();
                var newValue = new object();

                var complexMetadata = CreateComplexMetadata(userObject, oldComplexObject);
                var scalarMetadata = CreateNestedScalarMetadata(newComplexObject, newValue);

                var mockStateManager = new Mock<ObjectStateManager>();
                mockStateManager
                    .Setup(m => m.GetOrAddStateManagerTypeMetadata(It.IsAny<EdmType>()))
                    .Returns(scalarMetadata);

                var entry = new EntityEntry(mockStateManager.Object);
                entry.SetOriginalEntityValue(mockMetadata.Object, 2, new object(), 7);
                entry.SetOriginalEntityValue(mockMetadata.Object, 1, new object(), 0);

                entry.SetOriginalEntityValue(complexMetadata, 3, userObject, newComplexObject);

                Assert.Equal(2, entry.FindOriginalValueIndex(scalarMetadata.Member(0), oldComplexObject));
                Assert.Same(
                    newValue,
                    entry.GetOriginalEntityValue(scalarMetadata, 0, oldComplexObject, ObjectStateValueRecord.OriginalReadonly));
            }