Question

我的存储库上有一个插入方法，如下所示：

public T Insert(T entity) 
{
    _ctx.AddObject(EntityName, entity);
    _ctx.SaveChanges();
    return entity;
}

如果我执行以下代码，分配给我的实体的值不会传播到执行的SQL。

Category c = new Category();
c.Name = CLEARANCE;
c = categoryManager.Insert(c);

SQL应该像

INSERT INTO Category(Name) VALUES('Clearance')

相反，正在执行以下SQL

insert [dbo].[Category]([Name])
values (null)
select [Id]
from [dbo].[Category]
where @@ROWCOUNT > 0 and [Id] = scope_identity()

我将代码调试到AddObject方法，并验证了在实体上设置了Name属性，但它没有在SQL中反映出来。

你能看到我在做什么有什么问题吗？

更新了映射xml

    <?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
  <!-- EF Runtime content -->
  <edmx:Runtime>
    <!-- SSDL content -->
    <edmx:StorageModels>
      <Schema Namespace="ProductCatalogModel.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2008" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2006/04/edm/ssdl">
        <EntityContainer Name="ProductCatalogModelStoreContainer">
          <EntitySet Name="Category" EntityType="ProductCatalogModel.Store.Category" store:Type="Tables" Schema="dbo" />
          <EntitySet Name="Product" EntityType="ProductCatalogModel.Store.Product" store:Type="Tables" Schema="dbo" />
          <AssociationSet Name="FK_Product_Category" Association="ProductCatalogModel.Store.FK_Product_Category">
            <End Role="Category" EntitySet="Category" />
            <End Role="Product" EntitySet="Product" />
          </AssociationSet>
        </EntityContainer>
        <EntityType Name="Category">
          <Key>
            <PropertyRef Name="Id" />
          </Key>
          <Property Name="Id" Type="int" Nullable="false" StoreGeneratedPattern="Identity" />
          <Property Name="Name" Type="varchar" Nullable="false" MaxLength="50" />
        </EntityType>
        <EntityType Name="Product">
          <Key>
            <PropertyRef Name="Id" />
          </Key>
          <Property Name="Id" Type="int" Nullable="false" StoreGeneratedPattern="Identity" />
          <Property Name="Name" Type="varchar" Nullable="false" MaxLength="50" />
          <Property Name="CategoryId" Type="int" Nullable="false" />
        </EntityType>
        <Association Name="FK_Product_Category">
          <End Role="Category" Type="ProductCatalogModel.Store.Category" Multiplicity="1" />
          <End Role="Product" Type="ProductCatalogModel.Store.Product" Multiplicity="*" />
          <ReferentialConstraint>
            <Principal Role="Category">
              <PropertyRef Name="Id" />
            </Principal>
            <Dependent Role="Product">
              <PropertyRef Name="CategoryId" />
            </Dependent>
          </ReferentialConstraint>
        </Association>
      </Schema>
    </edmx:StorageModels>
    <!-- CSDL content -->
    <edmx:ConceptualModels>
      <Schema Namespace="ProductCatalogModel" Alias="Self" xmlns="http://schemas.microsoft.com/ado/2006/04/edm">
        <EntityContainer Name="ProductCatalogEntities">
          <EntitySet Name="Category" EntityType="ProductCatalogModel.Category" />
          <EntitySet Name="Product" EntityType="ProductCatalogModel.Product" />
          <AssociationSet Name="FK_Product_Category" Association="ProductCatalogModel.FK_Product_Category">
            <End Role="Category" EntitySet="Category" />
            <End Role="Product" EntitySet="Product" />
          </AssociationSet>
          </EntityContainer>
        <EntityType Name="Category">
          <Key>
            <PropertyRef Name="Id" />
          </Key>
          <Property Name="Id" Type="Int32" Nullable="false" />
          <Property Name="Name" Type="String" Nullable="false" MaxLength="50" Unicode="false" FixedLength="false" />
          <NavigationProperty Name="Product" Relationship="ProductCatalogModel.FK_Product_Category" FromRole="Category" ToRole="Product" />
        </EntityType>
        <EntityType Name="Product" Abstract="false">
          <Key>
            <PropertyRef Name="Id" />
          </Key>
          <Property Name="Id" Type="Int32" Nullable="false" />
          <Property Name="Name" Type="String" Nullable="false" MaxLength="50" Unicode="false" FixedLength="false" />
          <NavigationProperty Name="Category" Relationship="ProductCatalogModel.FK_Product_Category" FromRole="Product" ToRole="Category" />
        </EntityType>
        <Association Name="FK_Product_Category">
          <End Role="Category" Type="ProductCatalogModel.Category" Multiplicity="1" />
          <End Role="Product" Type="ProductCatalogModel.Product" Multiplicity="*" />
        </Association>
        </Schema>
    </edmx:ConceptualModels>
    <!-- C-S mapping content -->
    <edmx:Mappings>
      <Mapping Space="C-S" xmlns="urn:schemas-microsoft-com:windows:storage:mapping:CS">
        <EntityContainerMapping StorageEntityContainer="ProductCatalogModelStoreContainer" CdmEntityContainer="ProductCatalogEntities">
          <EntitySetMapping Name="Category">
            <EntityTypeMapping TypeName="IsTypeOf(ProductCatalogModel.Category)">
              <MappingFragment StoreEntitySet="Category">
                <ScalarProperty Name="Id" ColumnName="Id" />
                <ScalarProperty Name="Name" ColumnName="Name" />
              </MappingFragment>
            </EntityTypeMapping>
          </EntitySetMapping>
          <EntitySetMapping Name="Product">
            <EntityTypeMapping TypeName="IsTypeOf(ProductCatalogModel.Product)">
              <MappingFragment StoreEntitySet="Product">
                <ScalarProperty Name="Id" ColumnName="Id" />
                <ScalarProperty Name="Name" ColumnName="Name" />
              </MappingFragment>
            </EntityTypeMapping>
            </EntitySetMapping>
          <AssociationSetMapping Name="FK_Product_Category" TypeName="ProductCatalogModel.FK_Product_Category" StoreEntitySet="Product">
            <EndProperty Name="Category">
              <ScalarProperty Name="Id" ColumnName="CategoryId" />
            </EndProperty>
            <EndProperty Name="Product">
              <ScalarProperty Name="Id" ColumnName="Id" />
            </EndProperty>
          </AssociationSetMapping>
          </EntityContainerMapping>
      </Mapping>
    </edmx:Mappings>
  </edmx:Runtime>
  <!-- EF Designer content (DO NOT EDIT MANUALLY BELOW HERE) -->
  <edmx:Designer xmlns="http://schemas.microsoft.com/ado/2007/06/edmx">
    <edmx:Connection>
      <DesignerInfoPropertySet>
        <DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" />
      </DesignerInfoPropertySet>
    </edmx:Connection>
    <edmx:Options>
      <DesignerInfoPropertySet>
        <DesignerProperty Name="ValidateOnBuild" Value="true" />
      </DesignerInfoPropertySet>
    </edmx:Options>
    <!-- Diagram content (shape and connector positions) -->
    <edmx:Diagrams>
      <Diagram Name="Model">
        <EntityTypeShape EntityType="ProductCatalogModel.Category" Width="1.5" PointX="0.75" PointY="0.875" Height="1.427958984375" IsExpanded="true" />
        <EntityTypeShape EntityType="ProductCatalogModel.Product" Width="1.5" PointX="3" PointY="0.875" Height="1.427958984375" IsExpanded="true" />
        <AssociationConnector Association="ProductCatalogModel.FK_Product_Category" ManuallyRouted="false">
          <ConnectorPoint PointX="2.25" PointY="1.5889794921875" />
          <ConnectorPoint PointX="3" PointY="1.5889794921875" /></AssociationConnector>
        </Diagram></edmx:Diagrams>
  </edmx:Designer>
</edmx:Edmx>

Answer 1

我讨厌这样说，但我所做的一切都是乱了大约一个小时，现在它起作用了。我没有改变一件令人讨厌的事情。感谢Microsoft提供这样的生产就绪技术。

Answer 2

可能与此问题没有关系，但有一些事情要考虑使用EntityFramework

编译是特定于数据库的。如果您不针对您计划使用的数据库版本（例如，SQL Server 2005 vs 2000）编译它，则会出现问题 - 如果您的本地数据库是2005而不是测试或生产环境是2000，则会导致问题。
对edmx文件进行小的更改，即使是在设计器视图中移动实体这么小的事情也会导致数据库映射文件重新编译，而可能会修复与映射相关的问题/ etc。

实体框架 - 通过objectcontext插入新实体不使用现有实体属性

2 个答案: