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ForeignKeyPropertyDiscoveryConvention.cs
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ForeignKeyPropertyDiscoveryConvention.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.EntityFrameworkCore.Metadata.Internal;
namespace Microsoft.EntityFrameworkCore.Metadata.Conventions;
/// <summary>
/// A convention that finds foreign key properties for relationships based on their names, ignoring case:
/// * [navigation property name][principal key property name]
/// * [navigation property name]Id
/// * [principal entity name][principal key property name]
/// * [principal entity name]Id
/// </summary>
/// <remarks>
/// <para>
/// If no matching properties were found, the relationship doesn't represent an ownership,
/// the dependent side is not ambiguous and not derived then if the relationship is one-to-one,
/// the primary key properties are used, otherwise the convention tries to match properties with
/// the exact name as principal key properties if they are a proper subset of the dependent PK.
/// </para>
/// <para>
/// </para>
/// <para>
/// If a match was found, but the property types are not compatible with the principal key types no further matches are searched for.
/// </para>
/// <para>
/// If the relationship uses shadow properties created by convention they are recreated to remove suffixes
/// used to make the names unique.
/// </para>
/// <para>
/// See <see href="https://aka.ms/efcore-docs-conventions">Model building conventions</see> for more information and examples.
/// </para>
/// </remarks>
public class ForeignKeyPropertyDiscoveryConvention :
IEntityTypeMemberIgnoredConvention,
IEntityTypePrimaryKeyChangedConvention,
IForeignKeyAddedConvention,
IForeignKeyPropertiesChangedConvention,
IForeignKeyPrincipalEndChangedConvention,
IForeignKeyUniquenessChangedConvention,
IForeignKeyRequirednessChangedConvention,
IKeyAddedConvention,
IKeyRemovedConvention,
INavigationAddedConvention,
ISkipNavigationForeignKeyChangedConvention,
ISkipNavigationInverseChangedConvention,
IPropertyAddedConvention,
IPropertyNullabilityChangedConvention,
IPropertyFieldChangedConvention,
IModelFinalizingConvention
{
/// <summary>
/// Creates a new instance of <see cref="ForeignKeyPropertyDiscoveryConvention" />.
/// </summary>
/// <param name="dependencies">Parameter object containing dependencies for this convention.</param>
public ForeignKeyPropertyDiscoveryConvention(ProviderConventionSetBuilderDependencies dependencies)
{
Dependencies = dependencies;
}
/// <summary>
/// Dependencies for this service.
/// </summary>
protected virtual ProviderConventionSetBuilderDependencies Dependencies { get; }
/// <summary>
/// Called after a foreign key is added to the entity type.
/// </summary>
/// <param name="relationshipBuilder">The builder for the foreign key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessForeignKeyAdded(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext<IConventionForeignKeyBuilder> context)
{
var newRelationshipBuilder = ProcessForeignKey(relationshipBuilder, context);
context.StopProcessingIfChanged(newRelationshipBuilder);
}
private IConventionForeignKeyBuilder ProcessForeignKey(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext context)
{
var shouldBeRequired = true;
foreach (var property in relationshipBuilder.Metadata.Properties)
{
if (property.IsNullable)
{
shouldBeRequired = false;
relationshipBuilder.IsRequired(false);
break;
}
}
if (shouldBeRequired)
{
relationshipBuilder.IsRequired(true);
}
var newRelationshipBuilder = DiscoverProperties(relationshipBuilder, context)!;
// If new properties were used for this relationship we have to examine the other foreign keys
// in case they can use the properties used previously.
var fksToProcess = newRelationshipBuilder.Metadata.DeclaringEntityType.GetForeignKeys()
.Where(fk => fk != newRelationshipBuilder.Metadata)
.Concat(
newRelationshipBuilder.Metadata.DeclaringEntityType.GetDerivedTypes()
.SelectMany(et => et.GetDeclaredForeignKeys()))
.ToList();
foreach (var fk in fksToProcess)
{
if (fk.IsInModel)
{
DiscoverProperties(fk.Builder, context);
}
}
return newRelationshipBuilder;
}
private IConventionForeignKeyBuilder? DiscoverProperties(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext context)
{
var foreignKey = relationshipBuilder.Metadata;
var foreignKeyProperties = FindCandidateForeignKeyProperties(relationshipBuilder.Metadata, onDependent: true);
var propertiesConfigurationSource = foreignKey.GetPropertiesConfigurationSource();
if (!ConfigurationSource.Convention.OverridesStrictly(propertiesConfigurationSource)
&& (propertiesConfigurationSource != ConfigurationSource.Convention
|| (foreignKey.Properties.All(p => !p.IsImplicitlyCreated())
&& (foreignKeyProperties == null
|| !foreignKey.Properties.SequenceEqual(foreignKeyProperties)))))
{
var batch = context.DelayConventions();
using var foreignKeyReference = batch.Track(foreignKey);
foreach (var fkProperty in foreignKey.Properties)
{
if (ConfigurationSource.Convention.Overrides(fkProperty.GetTypeConfigurationSource())
&& (fkProperty.IsShadowProperty() || fkProperty.IsIndexerProperty())
&& fkProperty.ClrType.IsNullableType() == foreignKey.IsRequired
&& fkProperty.GetContainingForeignKeys().All(otherFk => otherFk.IsRequired == foreignKey.IsRequired))
{
var newType = fkProperty.ClrType.MakeNullable(!foreignKey.IsRequired);
if (fkProperty.ClrType != newType)
{
fkProperty.DeclaringEntityType.Builder.Property(
newType,
fkProperty.Name,
fkProperty.GetConfigurationSource() == ConfigurationSource.DataAnnotation);
}
}
}
batch.Dispose();
return foreignKeyReference.Object is null || !foreignKeyReference.Object.IsInModel
? null
: foreignKeyReference.Object.Builder;
}
var invertible = true;
if (foreignKey.IsOwnership
|| foreignKey.DeclaringEntityType.IsKeyless
|| (!foreignKey.IsUnique && !ConfigurationSource.Convention.Overrides(foreignKey.GetIsUniqueConfigurationSource()))
|| foreignKey.PrincipalToDependent?.IsCollection == true
|| foreignKey.DeclaringEntityType.FindOwnership() != null
|| (foreignKey.IsBaseLinking()
&& foreignKey.PrincipalEntityType.IsAssignableFrom(foreignKey.DeclaringEntityType)))
{
relationshipBuilder = relationshipBuilder.HasEntityTypes(
foreignKey.PrincipalEntityType, foreignKey.DeclaringEntityType)!;
invertible = false;
}
else if (ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource())
&& (foreignKey.PrincipalEntityType.FindOwnership() != null
&& foreignKey.PrincipalToDependent != null
&& foreignKey.DependentToPrincipal == null))
{
var invertedRelationshipBuilder = relationshipBuilder.HasEntityTypes(
foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType);
if (invertedRelationshipBuilder != null)
{
return invertedRelationshipBuilder;
}
}
if (foreignKeyProperties == null)
{
if (invertible
&& ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
var candidatePropertiesOnPrincipal = FindCandidateForeignKeyProperties(foreignKey, onDependent: false);
if (candidatePropertiesOnPrincipal != null)
{
var invertedRelationshipBuilder = relationshipBuilder
.HasEntityTypes(foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType);
if (invertedRelationshipBuilder is not null
&& invertedRelationshipBuilder.Metadata is IConventionForeignKey invertedFk
&& invertedFk.IsSelfReferencing())
{
invertedRelationshipBuilder = invertedRelationshipBuilder.HasNavigations(
invertedFk.PrincipalToDependent?.Name, invertedFk.DependentToPrincipal?.Name);
}
return invertedRelationshipBuilder ?? (!foreignKey.IsInModel ? null : relationshipBuilder);
}
}
if (foreignKey.DeclaringEntityType.BaseType == null
&& !foreignKey.IsSelfReferencing())
{
if (foreignKey.IsUnique)
{
// Try to use PK properties if principal end is not ambiguous
if (!foreignKey.IsOwnership
&& (!ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource())
|| foreignKey.DeclaringEntityType.IsInOwnershipPath(foreignKey.PrincipalEntityType)))
{
foreignKeyProperties = GetCompatiblePrimaryKeyProperties(
foreignKey.DeclaringEntityType,
foreignKey.PrincipalEntityType,
foreignKey.PrincipalKey.Properties);
}
else if (invertible)
{
foreignKeyProperties = FindCandidateForeignKeyProperties(foreignKey, onDependent: true, matchPk: true);
var candidatePropertiesOnPrincipal =
FindCandidateForeignKeyProperties(foreignKey, onDependent: false, matchPk: true);
if (candidatePropertiesOnPrincipal != null)
{
if (foreignKeyProperties == null)
{
using var batch = context.DelayConventions();
var invertedRelationshipBuilder = relationshipBuilder
.HasEntityTypes(foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType)!;
return batch.Run(
invertedRelationshipBuilder.HasForeignKey(candidatePropertiesOnPrincipal)!.Metadata)
?.Builder;
}
foreignKeyProperties = null;
((ForeignKey)relationshipBuilder.Metadata).SetPrincipalEndConfigurationSource(null);
}
}
}
else
{
// Try match properties with the exact name as principal key if they are a proper subset of the dependent PK
var dependentPk = foreignKey.DeclaringEntityType.FindPrimaryKey();
if (dependentPk != null
&& dependentPk.Properties.Count > foreignKey.PrincipalKey.Properties.Count
&& TryFindMatchingProperties(foreignKey, "", onDependent: true, matchPk: false, out foreignKeyProperties)
&& foreignKeyProperties != null
&& foreignKeyProperties.Any(
p => !dependentPk.Properties.Contains(p)
|| p.Name.Equals("Id", StringComparison.OrdinalIgnoreCase)))
{
foreignKeyProperties = null;
}
}
}
if (foreignKeyProperties == null
&& invertible
&& ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
((ForeignKey)relationshipBuilder.Metadata).SetPrincipalEndConfigurationSource(null);
}
}
else if (invertible
&& ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
var candidatePropertiesOnPrincipal = FindCandidateForeignKeyProperties(foreignKey, onDependent: false);
if (candidatePropertiesOnPrincipal != null)
{
// Principal end is ambiguous
foreignKeyProperties = null;
((ForeignKey)relationshipBuilder.Metadata).SetPrincipalEndConfigurationSource(null);
}
}
if (foreignKeyProperties == null)
{
return ((ForeignKey)foreignKey).Builder.ReuniquifyImplicitProperties(false);
}
var conflictingFKCount = foreignKey.DeclaringEntityType.FindForeignKeys(foreignKeyProperties)
.Concat(
foreignKey.DeclaringEntityType.GetDerivedTypes()
.SelectMany(et => et.FindDeclaredForeignKeys(foreignKeyProperties)))
.Count();
if (foreignKey.Properties.SequenceEqual(foreignKeyProperties))
{
return conflictingFKCount > 1
? ((ForeignKey)foreignKey).Builder.ReuniquifyImplicitProperties(true)
: relationshipBuilder;
}
if (conflictingFKCount > 0)
{
return ((ForeignKey)foreignKey).Builder.ReuniquifyImplicitProperties(false);
}
var newRelationshipBuilder = relationshipBuilder.HasForeignKey(foreignKeyProperties);
if (newRelationshipBuilder != null)
{
return newRelationshipBuilder;
}
return relationshipBuilder.Metadata.IsInModel ? relationshipBuilder : null;
}
private IReadOnlyList<IConventionProperty>? FindCandidateForeignKeyProperties(
IConventionForeignKey foreignKey,
bool onDependent,
bool matchPk = false)
{
IReadOnlyList<IConventionProperty>? match;
if (onDependent)
{
foreach (var skipNavigation in foreignKey.GetReferencingSkipNavigations())
{
if (skipNavigation.Inverse == null)
{
continue;
}
if (TryFindMatchingProperties(foreignKey, skipNavigation.Inverse.Name, onDependent, matchPk: true, out match))
{
return match;
}
}
}
var navigation = onDependent
? foreignKey.DependentToPrincipal
: foreignKey.PrincipalToDependent;
if (navigation != null)
{
if (TryFindMatchingProperties(foreignKey, navigation.Name, onDependent, matchPk, out match))
{
return match;
}
}
var entityTypeToReference = onDependent
? foreignKey.PrincipalEntityType
: foreignKey.DeclaringEntityType;
if (TryFindMatchingProperties(foreignKey, entityTypeToReference.ShortName(), onDependent, matchPk, out match))
{
return match;
}
return match;
}
private static IReadOnlyList<IConventionProperty>? GetCompatiblePrimaryKeyProperties(
IConventionEntityType dependentEntityType,
IConventionEntityType principalEntityType,
IReadOnlyList<IConventionProperty> propertiesToReference)
{
var dependentPkProperties = dependentEntityType.FindPrimaryKey()?.Properties;
return dependentPkProperties != null
&& ForeignKey.AreCompatible(
propertiesToReference,
dependentPkProperties,
principalEntityType,
dependentEntityType,
shouldThrow: false)
? dependentPkProperties
: null;
}
private bool TryFindMatchingProperties(
IConventionForeignKey foreignKey,
string baseName,
bool onDependent,
bool matchPk,
out IReadOnlyList<IConventionProperty>? match)
{
match = null;
var dependentEntityType = onDependent
? foreignKey.DeclaringEntityType
: foreignKey.PrincipalEntityType;
var principalEntityType = onDependent
? foreignKey.PrincipalEntityType
: foreignKey.DeclaringEntityType;
var propertiesToReference = onDependent
? foreignKey.PrincipalKey.Properties
: foreignKey.DeclaringEntityType.FindPrimaryKey()?.Properties;
if (propertiesToReference == null)
{
return false;
}
var foreignKeyProperties = new IConventionProperty[propertiesToReference.Count];
var matchFound = true;
for (var i = 0; i < propertiesToReference.Count; i++)
{
var referencedProperty = propertiesToReference[i];
var property = TryGetProperty(
dependentEntityType,
baseName, referencedProperty.Name);
if (property == null)
{
matchFound = false;
continue;
}
foreignKeyProperties[i] = property;
}
if (!matchFound
&& propertiesToReference.Count == 1
&& baseName.Length > 0)
{
var property = TryGetProperty(
dependentEntityType,
baseName, "Id");
if (property != null)
{
foreignKeyProperties[0] = property;
matchFound = true;
}
}
if (!matchFound)
{
return false;
}
if (!ForeignKey.AreCompatible(
propertiesToReference,
foreignKeyProperties,
principalEntityType,
dependentEntityType,
shouldThrow: false))
{
if (propertiesToReference.All(
p => !p.IsImplicitlyCreated()
|| p.GetConfigurationSource().Overrides(ConfigurationSource.DataAnnotation)))
{
var dependentNavigationSpec = onDependent
? foreignKey.DependentToPrincipal?.Name
: foreignKey.PrincipalToDependent?.Name;
dependentNavigationSpec = dependentEntityType.DisplayName()
+ (string.IsNullOrEmpty(dependentNavigationSpec)
? string.Empty
: "." + dependentNavigationSpec);
var principalNavigationSpec = onDependent
? foreignKey.PrincipalToDependent?.Name
: foreignKey.DependentToPrincipal?.Name;
principalNavigationSpec = principalEntityType.DisplayName()
+ (string.IsNullOrEmpty(principalNavigationSpec)
? string.Empty
: "." + principalNavigationSpec);
Dependencies.Logger.IncompatibleMatchingForeignKeyProperties(
dependentNavigationSpec, principalNavigationSpec,
foreignKeyProperties, propertiesToReference);
}
// Stop searching if match found, but is incompatible
return true;
}
foreach (var key in dependentEntityType.GetKeys())
{
var isKeyContainedInForeignKey = true;
// ReSharper disable once LoopCanBeConvertedToQuery
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < key.Properties.Count; i++)
{
if (!foreignKeyProperties.Contains(key.Properties[i]))
{
isKeyContainedInForeignKey = false;
break;
}
}
if (isKeyContainedInForeignKey
&& (!foreignKey.IsUnique
|| (key.IsPrimaryKey()
&& !matchPk)))
{
// Stop searching if match found, but is incompatible
return true;
}
}
match = foreignKeyProperties;
return true;
}
private static IConventionProperty? TryGetProperty(IConventionEntityType entityType, string prefix, string suffix)
{
foreach (var property in entityType.GetProperties())
{
if ((!property.IsImplicitlyCreated()
|| !ConfigurationSource.Convention.Overrides(property.GetConfigurationSource()))
&& property.Name.Length == prefix.Length + suffix.Length
&& property.Name.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)
&& property.Name.EndsWith(suffix, StringComparison.OrdinalIgnoreCase))
{
return property;
}
}
return null;
}
/// <inheritdoc />
public virtual void ProcessNavigationAdded(
IConventionNavigationBuilder navigationBuilder,
IConventionContext<IConventionNavigationBuilder> context)
{
var navigation = navigationBuilder.Metadata;
var newRelationshipBuilder = DiscoverProperties(navigation.ForeignKey.Builder, context);
if (newRelationshipBuilder != null)
{
context.StopProcessingIfChanged(newRelationshipBuilder.Metadata.GetNavigation(navigation.IsOnDependent)?.Builder);
}
}
/// <summary>
/// Called after a property is added to the entity type.
/// </summary>
/// <param name="propertyBuilder">The builder for the property.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessPropertyAdded(
IConventionPropertyBuilder propertyBuilder,
IConventionContext<IConventionPropertyBuilder> context)
{
Process(propertyBuilder, context);
if (!propertyBuilder.Metadata.IsInModel)
{
context.StopProcessing();
}
}
private void Process(IConventionPropertyBuilder propertyBuilder, IConventionContext context)
{
var property = propertyBuilder.Metadata;
if (property.IsImplicitlyCreated()
&& ConfigurationSource.Convention.Overrides(property.GetConfigurationSource()))
{
return;
}
var entityType = propertyBuilder.Metadata.DeclaringEntityType;
Process(entityType, context);
}
/// <summary>
/// Called after an entity type member is ignored.
/// </summary>
/// <param name="entityTypeBuilder">The builder for the entity type.</param>
/// <param name="name">The name of the ignored member.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessEntityTypeMemberIgnored(
IConventionEntityTypeBuilder entityTypeBuilder,
string name,
IConventionContext<string> context)
=> Process(entityTypeBuilder.Metadata, context);
private void Process(IConventionEntityType entityType, IConventionContext context)
{
foreach (var foreignKey in entityType.GetDeclaredForeignKeys().Concat(entityType.GetDerivedForeignKeys()).ToList())
{
if (foreignKey.IsInModel)
{
DiscoverProperties(foreignKey.Builder, context);
}
}
foreach (var foreignKey in entityType.GetReferencingForeignKeys().ToList())
{
if (foreignKey.IsInModel
&& ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
DiscoverProperties(foreignKey.Builder, context);
}
}
}
/// <summary>
/// Called after the backing field for a property is changed.
/// </summary>
/// <param name="propertyBuilder">The builder for the property.</param>
/// <param name="newFieldInfo">The new field.</param>
/// <param name="oldFieldInfo">The old field.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessPropertyFieldChanged(
IConventionPropertyBuilder propertyBuilder,
FieldInfo? newFieldInfo,
FieldInfo? oldFieldInfo,
IConventionContext<FieldInfo> context)
=> Process(propertyBuilder, context);
/// <summary>
/// Called after the nullability for a property is changed.
/// </summary>
/// <param name="propertyBuilder">The builder for the property.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessPropertyNullabilityChanged(
IConventionPropertyBuilder propertyBuilder,
IConventionContext<bool?> context)
{
var nullable = propertyBuilder.Metadata.IsNullable;
foreach (var containingForeignKey in propertyBuilder.Metadata.GetContainingForeignKeys())
{
if (containingForeignKey.IsRequired != nullable
|| (!nullable
&& containingForeignKey.Properties.Any(p => p.IsNullable)))
{
continue;
}
containingForeignKey.Builder.IsRequired(!nullable);
}
}
/// <summary>
/// Called after the uniqueness for a foreign key is changed.
/// </summary>
/// <param name="relationshipBuilder">The builder for the foreign key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessForeignKeyUniquenessChanged(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext<bool?> context)
{
var newRelationshipBuilder = DiscoverProperties(relationshipBuilder, context)!;
context.StopProcessingIfChanged(newRelationshipBuilder.Metadata.IsUnique);
}
/// <summary>
/// Called after the requiredness for a foreign key is changed.
/// </summary>
/// <param name="relationshipBuilder">The builder for the foreign key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessForeignKeyRequirednessChanged(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext<bool?> context)
{
var isRequired = relationshipBuilder.Metadata.IsRequired;
using var batch = context.DelayConventions();
foreach (var property in relationshipBuilder.Metadata.Properties.Where(p => p.ClrType.IsNullableType()))
{
var requiredSet = property.Builder.IsRequired(isRequired) != null;
if (requiredSet
&& isRequired != true)
{
break;
}
}
var newForeignKey = batch.Run(DiscoverProperties(relationshipBuilder, context)!.Metadata);
if (newForeignKey != relationshipBuilder.Metadata
|| newForeignKey.IsRequired != isRequired)
{
context.StopProcessing();
}
}
/// <summary>
/// Called after the foreign key properties or principal key are changed.
/// </summary>
/// <param name="relationshipBuilder">The builder for the foreign key.</param>
/// <param name="oldDependentProperties">The old foreign key properties.</param>
/// <param name="oldPrincipalKey">The old principal key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessForeignKeyPropertiesChanged(
IConventionForeignKeyBuilder relationshipBuilder,
IReadOnlyList<IConventionProperty> oldDependentProperties,
IConventionKey oldPrincipalKey,
IConventionContext<IReadOnlyList<IConventionProperty>> context)
{
if (!relationshipBuilder.Metadata.IsInModel
|| relationshipBuilder.Metadata.Properties == oldDependentProperties)
{
return;
}
ProcessForeignKey(relationshipBuilder, context);
context.StopProcessingIfChanged(relationshipBuilder.Metadata.Properties);
}
/// <summary>
/// Called after the principal end of a foreign key is changed.
/// </summary>
/// <param name="relationshipBuilder">The builder for the foreign key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessForeignKeyPrincipalEndChanged(
IConventionForeignKeyBuilder relationshipBuilder,
IConventionContext<IConventionForeignKeyBuilder> context)
=> ProcessForeignKeyAdded(relationshipBuilder, context);
/// <summary>
/// Called after a key is added to the entity type.
/// </summary>
/// <param name="keyBuilder">The builder for the key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessKeyAdded(IConventionKeyBuilder keyBuilder, IConventionContext<IConventionKeyBuilder> context)
{
var key = keyBuilder.Metadata;
foreach (var foreignKey in key.DeclaringEntityType.GetDerivedTypesInclusive()
.SelectMany(t => t.GetDeclaredForeignKeys()).ToList())
{
if (key.Properties.All(p => foreignKey.Properties.Contains(p))
&& (!foreignKey.IsUnique || foreignKey.DeclaringEntityType.BaseType != null))
{
foreignKey.Builder.HasForeignKey((IReadOnlyList<IConventionProperty>?)null);
}
}
}
/// <inheritdoc />
public virtual void ProcessKeyRemoved(
IConventionEntityTypeBuilder entityTypeBuilder,
IConventionKey key,
IConventionContext<IConventionKey> context)
{
var foreignKeys = key.DeclaringEntityType.GetDerivedTypesInclusive()
.SelectMany(t => t.GetDeclaredForeignKeys()).ToList();
foreach (var foreignKey in foreignKeys)
{
if ((foreignKey.IsUnique
&& foreignKey.DeclaringEntityType.BaseType == null)
|| !foreignKey.IsInModel)
{
continue;
}
DiscoverProperties(foreignKey.Builder, context);
}
}
/// <summary>
/// Called after the primary key for an entity type is changed.
/// </summary>
/// <param name="entityTypeBuilder">The builder for the entity type.</param>
/// <param name="newPrimaryKey">The new primary key.</param>
/// <param name="previousPrimaryKey">The old primary key.</param>
/// <param name="context">Additional information associated with convention execution.</param>
public virtual void ProcessEntityTypePrimaryKeyChanged(
IConventionEntityTypeBuilder entityTypeBuilder,
IConventionKey? newPrimaryKey,
IConventionKey? previousPrimaryKey,
IConventionContext<IConventionKey> context)
{
if (newPrimaryKey != null && !newPrimaryKey.IsInModel)
{
return;
}
var foreignKeys = entityTypeBuilder.Metadata.GetDerivedTypesInclusive()
.SelectMany(t => t.GetDeclaredForeignKeys()).ToList();
foreach (var foreignKey in foreignKeys)
{
if (foreignKey.IsUnique)
{
DiscoverProperties(foreignKey.Builder, context);
}
}
var referencingForeignKeys = entityTypeBuilder.Metadata.GetDerivedTypesInclusive()
.SelectMany(t => t.GetDeclaredReferencingForeignKeys()).ToList();
foreach (var referencingForeignKey in referencingForeignKeys)
{
DiscoverProperties(referencingForeignKey.Builder, context);
}
}
/// <inheritdoc />
public virtual void ProcessSkipNavigationForeignKeyChanged(
IConventionSkipNavigationBuilder skipNavigationBuilder,
IConventionForeignKey? foreignKey,
IConventionForeignKey? oldForeignKey,
IConventionContext<IConventionForeignKey> context)
{
if (foreignKey?.IsInModel == true
&& foreignKey.GetPropertiesConfigurationSource() == null
&& skipNavigationBuilder.Metadata.Inverse?.IsInModel == true)
{
DiscoverProperties(foreignKey.Builder, context);
}
}
/// <inheritdoc />
public virtual void ProcessSkipNavigationInverseChanged(
IConventionSkipNavigationBuilder skipNavigationBuilder,
IConventionSkipNavigation? inverse,
IConventionSkipNavigation? oldInverse,
IConventionContext<IConventionSkipNavigation> context)
{
var foreignKey = skipNavigationBuilder.Metadata.ForeignKey;
if (foreignKey != null
&& foreignKey.GetPropertiesConfigurationSource() == null
&& inverse?.IsInModel == true)
{
DiscoverProperties(foreignKey.Builder, context);
}
}
/// <inheritdoc />
public virtual void ProcessModelFinalizing(
IConventionModelBuilder modelBuilder,
IConventionContext<IConventionModelBuilder> context)
{
foreach (var entityType in modelBuilder.Metadata.GetEntityTypes())
{
var conflictingFkFound = false;
foreach (var foreignKey in entityType.GetDeclaredForeignKeys().Where(fk => fk.GetPropertiesConfigurationSource() == null))
{
var foreignKeyProperties = FindCandidateForeignKeyProperties(foreignKey, onDependent: true);
if (foreignKeyProperties != null)
{
var conflictingForeignKey = foreignKey.DeclaringEntityType.FindForeignKeys(foreignKeyProperties).Concat(
foreignKey.DeclaringEntityType.GetDerivedTypes()
.SelectMany(et => et.FindDeclaredForeignKeys(foreignKeyProperties)))
.FirstOrDefault(
fk => fk != foreignKey
&& ConfigurationSource.Convention.Overrides(fk.GetPropertiesConfigurationSource()));
if (conflictingForeignKey != null)
{
throw new InvalidOperationException(
CoreStrings.AmbiguousForeignKeyPropertyCandidates(
conflictingForeignKey.DeclaringEntityType.DisplayName()
+ (conflictingForeignKey.DependentToPrincipal == null
? ""
: "." + conflictingForeignKey.DependentToPrincipal.Name),
conflictingForeignKey.PrincipalEntityType.DisplayName()
+ (conflictingForeignKey.PrincipalToDependent == null
? ""
: "." + conflictingForeignKey.PrincipalToDependent.Name),
foreignKey.DeclaringEntityType.DisplayName()
+ (foreignKey.DependentToPrincipal == null ? "" : "." + foreignKey.DependentToPrincipal.Name),
foreignKey.PrincipalEntityType.DisplayName()
+ (foreignKey.PrincipalToDependent == null ? "" : "." + foreignKey.PrincipalToDependent.Name),
foreignKeyProperties.Format()));
}
}
if (conflictingFkFound)
{
continue;
}
if (HasUniquifiedProperties(foreignKey))
{
var conflictingFk = entityType.GetDeclaredForeignKeys().FirstOrDefault(
otherForeignKey =>
otherForeignKey != foreignKey
&& otherForeignKey.PrincipalEntityType == foreignKey.PrincipalEntityType
&& otherForeignKey.GetPropertiesConfigurationSource() == null);
if (conflictingFk != null)
{
conflictingFkFound = true;
Dependencies.Logger.ConflictingShadowForeignKeysWarning(conflictingFk);
}
}
}
}
}
/// <summary>
/// Gets the string that should be used as part of the shadow properties created for the given foreign key.
/// </summary>
/// <param name="foreignKey">The foreign key.</param>
/// <returns>The string that should be used as part of the shadow properties created for the given foreign key.</returns>
public static string GetPropertyBaseName(IReadOnlyForeignKey foreignKey)
=> foreignKey.DependentToPrincipal?.Name
?? foreignKey.GetReferencingSkipNavigations().FirstOrDefault()?.Inverse?.Name
?? foreignKey.PrincipalEntityType.ShortName();
private static bool HasUniquifiedProperties(IConventionForeignKey foreignKey)
{
if (foreignKey.GetPropertiesConfigurationSource() != null)
{
return false;
}
var fkBaseName = GetPropertyBaseName(foreignKey);
for (var i = 0; i < foreignKey.Properties.Count; i++)
{
var property = foreignKey.Properties[i];
if (!ConfigurationSource.Convention.Overrides(property.GetConfigurationSource())
|| !property.IsImplicitlyCreated())
{
return false;
}
var fkPropertyName = property.Name;
var pkPropertyName = foreignKey.PrincipalKey.Properties[i].Name;
if (fkPropertyName.Length != fkBaseName.Length + pkPropertyName.Length
|| !fkPropertyName.StartsWith(fkBaseName, StringComparison.Ordinal)
|| !fkPropertyName.EndsWith(pkPropertyName, StringComparison.Ordinal))
{
return true;
}
}
return false;
}
}