Я застрял, работая над ошибками с приведенным ниже отображением структуры сущностей.Я сделал следующее:
а) создал базу данных Sqlite (см. Ниже, отметив, что Sqlite не допускает ограничений FK) б) создал пустой режим данных сущностей, а затем создал модель из базы данных в)Затем проблема пытается добавить ассоциацию модели, чтобы она подняла и использовала столбец «ProcessNameId», который я создал в базе данных в таблице USAGES.Я пытался использовать панель GUI Table Mapping для этого, но она не кажется слишком интуитивной.
Проблема: я получаю следующую ошибку:
Error 3
Error 3021: Problem in mapping fragments starting at line 85:
Each of the following columns in table Usages is mapped to multiple conceptual side properties:
Usages.ProcessNameId is mapped to <ProcessNameUsage.ProcessName.Id, ProcessNameUsage.Usage.Id>
Error 4
Error 3025: Problem in mapping fragments starting at line 85:
Must specify mapping for all key properties (Usages.Id) of table Usages.
Вопрос. Итак, вопрос в том, какие изменения в XML нужно внести, чтобы ассоциация работала правильно?
SQL
CREATE TABLE "ProcessNames" (
"Id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
"Name" VARCHAR NOT NULL UNIQUE
)
CREATE TABLE "Usages" (
"Id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
"ProcessNameId" INTEGER NOT NULL ,
"Amount" INTEGER NOT NULL ,
"Datetime" DATETIME NOT NULL
)
Модель Config
<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="2.0" xmlns:edmx="http://schemas.microsoft.com/ado/2008/10/edmx">
<!-- EF Runtime content -->
<edmx:Runtime>
<!-- SSDL content -->
<edmx:StorageModels>
<Schema Namespace="Model1.Store" Alias="Self" Provider="System.Data.SQLite" ProviderManifestToken="ISO8601" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl">
<EntityContainer Name="Model1StoreContainer">
<EntitySet Name="ProcessNames" EntityType="Model1.Store.ProcessNames" store:Type="Tables" />
<EntitySet Name="Usages" EntityType="Model1.Store.Usages" store:Type="Tables" />
</EntityContainer>
<EntityType Name="ProcessNames">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="integer" Nullable="false" StoreGeneratedPattern="Identity" />
<Property Name="Name" Type="nvarchar" Nullable="false" />
</EntityType>
<EntityType Name="Usages">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Name="Id" Type="integer" Nullable="false" StoreGeneratedPattern="Identity" />
<Property Name="ProcessNameId" Type="integer" Nullable="false" />
<Property Name="Amount" Type="integer" Nullable="false" />
<Property Name="Datetime" Type="datetime" Nullable="false" />
</EntityType>
</Schema></edmx:StorageModels>
<!-- CSDL content -->
<edmx:ConceptualModels>
<Schema xmlns="http://schemas.microsoft.com/ado/2008/09/edm" xmlns:cg="http://schemas.microsoft.com/ado/2006/04/codegeneration" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" Namespace="Model1" Alias="Self" xmlns:annotation="http://schemas.microsoft.com/ado/2009/02/edm/annotation">
<EntityContainer Name="Model1Container" annotation:LazyLoadingEnabled="true">
<EntitySet Name="ProcessNames" EntityType="Model1.ProcessName" />
<EntitySet Name="Usages" EntityType="Model1.Usage" />
<AssociationSet Name="ProcessNameUsage" Association="Model1.ProcessNameUsage">
<End Role="ProcessName" EntitySet="ProcessNames" />
<End Role="Usage" EntitySet="Usages" />
</AssociationSet>
</EntityContainer>
<EntityType Name="ProcessName">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int64" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="String" Name="Name" Nullable="false" MaxLength="2147483647" FixedLength="false" Unicode="true" />
<NavigationProperty Name="Usages" Relationship="Model1.ProcessNameUsage" FromRole="ProcessName" ToRole="Usage" />
</EntityType>
<EntityType Name="Usage">
<Key>
<PropertyRef Name="Id" />
</Key>
<Property Type="Int64" Name="Id" Nullable="false" annotation:StoreGeneratedPattern="Identity" />
<Property Type="Int64" Name="ProcessNameId" Nullable="false" />
<Property Type="Int64" Name="Amount" Nullable="false" />
<Property Type="DateTime" Name="Datetime" Nullable="false" />
<NavigationProperty Name="ProcessName" Relationship="Model1.ProcessNameUsage" FromRole="Usage" ToRole="ProcessName" />
</EntityType>
<Association Name="ProcessNameUsage">
<End Type="Model1.ProcessName" Role="ProcessName" Multiplicity="1" />
<End Type="Model1.Usage" Role="Usage" Multiplicity="*" />
</Association>
</Schema>
</edmx:ConceptualModels>
<!-- C-S mapping content -->
<edmx:Mappings>
<Mapping Space="C-S" xmlns="http://schemas.microsoft.com/ado/2008/09/mapping/cs">
<EntityContainerMapping StorageEntityContainer="Model1StoreContainer" CdmEntityContainer="Model1Container">
<EntitySetMapping Name="ProcessNames">
<EntityTypeMapping TypeName="Model1.ProcessName">
<MappingFragment StoreEntitySet="ProcessNames">
<ScalarProperty Name="Name" ColumnName="Name" />
<ScalarProperty Name="Id" ColumnName="Id" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<EntitySetMapping Name="Usages">
<EntityTypeMapping TypeName="Model1.Usage">
<MappingFragment StoreEntitySet="Usages">
<ScalarProperty Name="Datetime" ColumnName="Datetime" />
<ScalarProperty Name="Amount" ColumnName="Amount" />
<ScalarProperty Name="ProcessNameId" ColumnName="ProcessNameId" />
<ScalarProperty Name="Id" ColumnName="Id" />
</MappingFragment>
</EntityTypeMapping>
</EntitySetMapping>
<AssociationSetMapping Name="ProcessNameUsage" TypeName="Model1.ProcessNameUsage" StoreEntitySet="Usages">
<EndProperty Name="ProcessName">
<ScalarProperty Name="Id" ColumnName="ProcessNameId" />
</EndProperty>
<EndProperty Name="Usage">
<ScalarProperty Name="Id" ColumnName="ProcessNameId" />
</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/2008/10/edmx">
<edmx:Connection>
<DesignerInfoPropertySet>
<DesignerProperty Name="MetadataArtifactProcessing" Value="EmbedInOutputAssembly" />
</DesignerInfoPropertySet>
</edmx:Connection>
<edmx:Options>
<DesignerInfoPropertySet>
<DesignerProperty Name="ValidateOnBuild" Value="true" />
<DesignerProperty Name="EnablePluralization" Value="True" />
<DesignerProperty Name="IncludeForeignKeysInModel" Value="False" />
</DesignerInfoPropertySet>
</edmx:Options>
<!-- Diagram content (shape and connector positions) -->
<edmx:Diagrams>
<Diagram Name="Model1" >
<EntityTypeShape EntityType="Model1.ProcessName" Width="1.5" PointX="0.75" PointY="0.75" Height="1.2636116536458317" />
<EntityTypeShape EntityType="Model1.Usage" Width="1.5" PointX="3" PointY="0.75" Height="1.7566536458333339" />
<AssociationConnector Association="Model1.ProcessNameUsage">
<ConnectorPoint PointX="2.25" PointY="1.4639794921875002" />
<ConnectorPoint PointX="3" PointY="1.4639794921875002" />
</AssociationConnector>
</Diagram>
</edmx:Diagrams>
</edmx:Designer>
</edmx:Edmx>
спасибо