/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
protected override Expression VisitEntityQueryable(Type elementType)
{
Check.NotNull(elementType, nameof(elementType));
IEntityType entityType = QueryModelVisitor.QueryCompilationContext.FindEntityType(_querySource)
?? _model.FindEntityType(elementType);
if (QueryModelVisitor.QueryCompilationContext
.QuerySourceRequiresMaterialization(_querySource))
{
Expression <Func <IEntityType, Microsoft.EntityFrameworkCore.Storage.ValueBuffer, object> > materializer = _materializerFactory.CreateMaterializer(entityType);
return(Expression.Call(
FileContextQueryModelVisitor.EntityQueryMethodInfo.MakeGenericMethod(elementType),
EntityQueryModelVisitor.QueryContextParameter,
Expression.Constant(entityType),
Expression.Constant(entityType.FindPrimaryKey()),
materializer,
Expression.Constant(QueryModelVisitor.QueryCompilationContext.IsTrackingQuery)));
}
return(Expression.Call(
FileContextQueryModelVisitor.ProjectionQueryMethodInfo,
EntityQueryModelVisitor.QueryContextParameter,
Expression.Constant(entityType)));
}
private bool TryGenerateIdFromKeys(IProperty idProperty, out object value)
{
var entityEntry = Activator.CreateInstance(_entityType.ClrType);
#pragma warning disable EF1001
var internalEntityEntry = new InternalEntityEntryFactory().Create(_stateManager, _entityType, entityEntry);
foreach (var keyProperty in _entityType.FindPrimaryKey().Properties)
{
var property = _entityType.FindProperty(keyProperty.Name);
if (TryGetParameterValue(property, out var parameterValue))
{
internalEntityEntry[property] = parameterValue;
}
}
internalEntityEntry.SetEntityState(EntityState.Added);
value = internalEntityEntry[idProperty];
internalEntityEntry.SetEntityState(EntityState.Detached);
#pragma warning restore EF1001
return(value != null);
}
protected virtual IEnumerable <MigrationOperation> Add([NotNull] IEntityType target, [NotNull] DiffContext diffContext)
{
var targetAnnotations = Annotations.For(target);
var createTableOperation = new CreateTableOperation
{
Schema = targetAnnotations.Schema,
Name = targetAnnotations.TableName
};
CopyAnnotations(MigrationsAnnotations.For(target), createTableOperation);
createTableOperation.Columns.AddRange(target.GetPropertiesInHierarchy().SelectMany(p => Add(p, inline: true)).Cast <AddColumnOperation>());
var primaryKey = target.FindPrimaryKey();
createTableOperation.PrimaryKey = Add(primaryKey).Cast <AddPrimaryKeyOperation>().Single();
createTableOperation.UniqueConstraints.AddRange(
target.GetKeys().Where(k => k != primaryKey).SelectMany(Add).Cast <AddUniqueConstraintOperation>());
diffContext.AddCreate(target, createTableOperation);
yield return(createTableOperation);
foreach (var operation in target.GetIndexesInHierarchy().SelectMany(Add))
{
yield return(operation);
}
}
public static IProperty?GetPrimaryKeyProperty(this IEntityType entityType)
{
var primaryKey = entityType.FindPrimaryKey();
var property = primaryKey.Properties.Count > 0 ? primaryKey.Properties[0] : null;
return(property);
}
private static bool IsIdentifyingPrincipal(IEntityType dependentEntityType, IEntityType principalEntityType)
{
return dependentEntityType.FindForeignKeys(dependentEntityType.FindPrimaryKey().Properties)
.Any(
fk => fk.PrincipalKey.IsPrimaryKey()
&& fk.PrincipalEntityType == principalEntityType);
}
private void CheckKey()
{
if (EntityType.FindPrimaryKey() == null)
{
throw new InvalidOperationException(CoreStrings.InvalidSetKeylessOperation(typeof(TEntity).ShortDisplayName()));
}
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual InternalEntityEntry GetOrCreateEntry(object entity, IEntityType entityType)
{
var entry = TryGetEntry(entity, entityType);
if (entry == null)
{
_trackingQueryMode = TrackingQueryMode.Multiple;
var runtimeEntityType = _model.FindRuntimeEntityType(entity.GetType());
if (runtimeEntityType != null)
{
if (!entityType.IsAssignableFrom(runtimeEntityType))
{
throw new InvalidOperationException(CoreStrings.TrackingTypeMismatch(
runtimeEntityType.DisplayName(), entityType.DisplayName()));
}
entityType = runtimeEntityType;
}
if (entityType.FindPrimaryKey() == null)
{
throw new InvalidOperationException(CoreStrings.KeylessTypeTracked(entityType.DisplayName()));
}
entry = _internalEntityEntryFactory.Create(this, entityType, entity);
UpdateReferenceMaps(entry, EntityState.Detached, null);
}
return(entry);
}
private void GenerateKeylessAttribute(IEntityType entityType)
{
if (entityType.FindPrimaryKey() == null)
{
_sb.AppendLine(new AttributeWriter(nameof(KeylessAttribute)).ToString());
}
}
private string GetKeyName <TEntity>()
{
IEntityType entityType = this.dbContext.Model.FindEntityType(typeof(TEntity));
IKey key = entityType.FindPrimaryKey();
return(key.Properties.First().Name);
}
private void GenerateEntityType(IEntityType entityType)
{
GenerateKey(entityType.FindPrimaryKey(), entityType);
var annotations = _annotationCodeGenerator
.FilterIgnoredAnnotations(entityType.GetAnnotations())
.ToDictionary(a => a.Name, a => a);
_annotationCodeGenerator.RemoveAnnotationsHandledByConventions(entityType, annotations);
annotations.Remove(RelationalAnnotationNames.TableName);
annotations.Remove(RelationalAnnotationNames.Schema);
annotations.Remove(RelationalAnnotationNames.ViewName);
annotations.Remove(RelationalAnnotationNames.ViewSchema);
annotations.Remove(ScaffoldingAnnotationNames.DbSetName);
annotations.Remove(RelationalAnnotationNames.ViewDefinitionSql);
if (_useDataAnnotations)
{
// Strip out any annotations handled as attributes - these are already handled when generating
// the entity's properties
_ = _annotationCodeGenerator.GenerateDataAnnotationAttributes(entityType, annotations);
}
if (!_useDataAnnotations || entityType.GetViewName() != null)
{
GenerateTableName(entityType);
}
var lines = new List <string>(
_annotationCodeGenerator.GenerateFluentApiCalls(entityType, annotations).Select(m => _code.Fragment(m))
.Concat(GenerateAnnotations(annotations.Values)));
AppendMultiLineFluentApi(entityType, lines);
foreach (var index in entityType.GetIndexes())
{
// If there are annotations that cannot be represented using an IndexAttribute then use fluent API even
// if useDataAnnotations is true.
var indexAnnotations = _annotationCodeGenerator
.FilterIgnoredAnnotations(index.GetAnnotations())
.ToDictionary(a => a.Name, a => a);
_annotationCodeGenerator.RemoveAnnotationsHandledByConventions(index, indexAnnotations);
if (!_useDataAnnotations || indexAnnotations.Count > 0)
{
GenerateIndex(index);
}
}
foreach (var property in entityType.GetProperties())
{
GenerateProperty(property);
}
foreach (var foreignKey in entityType.GetForeignKeys())
{
GenerateRelationship(foreignKey);
}
}
private Shaper CreateShaper(Type elementType, IEntityType entityType, FindExpression findExpression)
{
Shaper shaper;
var materializer
= _materializerFactory
.CreateMaterializer(
entityType,
findExpression,
(p, se) =>
se.AddToProjection(
_annotationsProvider.For(p).FieldName,
p)
).Compile();
shaper
= (Shaper)_createEntityShaperMethodInfo.MakeGenericMethod(elementType)
.Invoke(null, new object[]
{
entityType.DisplayName(),
QueryModelVisitor.QueryCompilationContext.IsTrackingQuery,
entityType.FindPrimaryKey(),
materializer
});
return(shaper);
}
private static object GetObjectGeneric <TEntity>(DbContext dbContext, EntityEntry entityEntry) where TEntity : class
{
IEntityType entityType = entityEntry.Metadata;
Type targetType = entityType.ClrType;
TEntity realObject;
IEnumerable <PropertyInfo> propertiesInfo = targetType.GetRuntimeProperties();
IKey primaryKey = entityType.FindPrimaryKey();
BinaryExpression expression = null;
ParameterExpression parameter = Expression.Parameter(targetType, "p");
foreach (IProperty property in primaryKey.Properties)
{
string propertyName = property.Name;
PropertyEntry propertyEntry = entityEntry.Property(propertyName);
BinaryExpression currentExpression = GetExpressionForKey(property, propertyEntry.CurrentValue, targetType, parameter);
if (expression == null)
{
expression = currentExpression;
}
else
{
expression = Expression.And(expression, currentExpression);
}
}
Expression <Func <TEntity, bool> > findExpression = Expression.Lambda <Func <TEntity, bool> >(expression, parameter);
// realObject = dbContext.Set<TEntity>().Where(findExpression).FirstOrDefault();
realObject = dbContext.Set <TEntity>().Where(findExpression).First();
return(realObject);
}
private List <KeyValuePair <string, object> > GetIdValuePairs(object[] id)
{
IEntityType entityType = DbContext.Model.FindEntityType(typeof(TEntity));
if (entityType == null)
{
var messge = string.Format(ExceptionResource.CannotFindEntityType, typeof(TEntity).FullName);
throw new InvalidOperationException(messge);
}
IKey primaryKey = entityType.FindPrimaryKey();
if (primaryKey == null)
{
var messge = string.Format(ExceptionResource.CannotFindPrimaryKey, typeof(TEntity).FullName);
throw new InvalidOperationException(messge);
}
if (primaryKey.Properties.Count != id.Length)
{
var messge = string.Format(ExceptionResource.InvalidIdCount, primaryKey.Properties.Count, id.Length);
throw new InvalidOperationException(messge);
}
var pairs = new List <KeyValuePair <string, object> >();
for (int i = 0; i < primaryKey.Properties.Count; i++)
{
pairs.Add(new KeyValuePair <string, object>(primaryKey.Properties[i].Name, id[i]));
}
return(pairs);
}
public override void AddEntity(Object dataContext, ODataResourceBase entry)
{
var context = (T)dataContext;
DbSet <TEntity> dbSet = _getEntitySet(context);
EntityEntry <TEntity> entityEntry = dbSet.Add(CreateEntity(context, entry));
IReadOnlyList <IProperty> keyProperties = _entityType.FindPrimaryKey().Properties;
for (int i = 0; i < keyProperties.Count; i++)
{
if (keyProperties[i].ValueGenerated == ValueGenerated.OnAdd)
{
entityEntry.GetInfrastructure().MarkAsTemporary(keyProperties[i]);
}
}
}
private void AddOneToManyCollection(INavigation navigation, IEntityType navigationType, StringBuilder stringBuilder, string parentAlias, IProperty keyProperty)
{
var navigationAlias = this.GetNextAlias(parentAlias);
#pragma warning disable EF1001 // Internal EF Core API usage.
var primaryKeyName = navigationType.FindDeclaredPrimaryKey().Properties[0].GetColumnName();
#pragma warning restore EF1001 // Internal EF Core API usage.
stringBuilder.AppendLine(", (")
.Append("select array_to_json(array_agg(row_to_json(").Append(navigationAlias).AppendLine("))) from (");
if (navigation.IsMemberOfAggregate())
{
this.AddTypeToQuery(navigationType, stringBuilder, navigationAlias);
stringBuilder.Append(") ").AppendLine(navigationAlias)
.Append("where ").Append(navigationAlias).Append(".\"").Append(keyProperty.Name).Append("\" = ").Append(parentAlias).Append(".\"").Append(primaryKeyName).AppendLine("\"");
}
else
{
var primaryKeyProperty = navigationType.FindPrimaryKey().Properties[0]; // It's always one property, usually called "Id"
stringBuilder.Append("select \"").Append(primaryKeyProperty.GetColumnName()).AppendLine("\" as \"$ref\"");
stringBuilder.Append("from ").Append(navigationType.GetSchema()).Append(".\"").Append(navigationType.GetTableName()).AppendLine("\" ")
.Append("where \"").Append(keyProperty.Name).Append("\" = ").Append(parentAlias).Append(".\"").Append(primaryKeyName).AppendLine("\"")
.Append(") as ").AppendLine(navigationAlias);
}
}
private TEntity FindTracked(object[] keyValues, out IReadOnlyList <IProperty> keyProperties)
{
var key = _entityType.FindPrimaryKey();
keyProperties = key.Properties;
if (keyProperties.Count != keyValues.Length)
{
if (keyProperties.Count == 1)
{
throw new ArgumentException(
CoreStrings.FindNotCompositeKey(typeof(TEntity).ShortDisplayName(), keyValues.Length));
}
throw new ArgumentException(
CoreStrings.FindValueCountMismatch(typeof(TEntity).ShortDisplayName(), keyProperties.Count, keyValues.Length));
}
for (var i = 0; i < keyValues.Length; i++)
{
var valueType = keyValues[i].GetType();
var propertyType = keyProperties[i].ClrType;
if (valueType != propertyType.UnwrapNullableType())
{
throw new ArgumentException(
CoreStrings.FindValueTypeMismatch(
i, typeof(TEntity).ShortDisplayName(), valueType.ShortDisplayName(), propertyType.ShortDisplayName()));
}
}
return(_stateManager.TryGetEntry(key, keyValues)?.Entity as TEntity);
}
/// <summary>
/// Creates the update command set with the supplied context.
/// </summary>
/// <param name="context"></param>
/// <param name="logger"></param>
public EntityUpdateCommands(DbContext context, ILogger logger)
{
Context = context ?? throw new ArgumentNullException(nameof(context));
Logger = logger ?? throw new ArgumentNullException(nameof(logger));
var t = typeof(TEntity);
EntityType = Context.Model.FindEntityType(t)
?? throw new ArgumentException($"The entity type {t} does not exist in the {Context.GetType()} model.");
Key = EntityType.FindPrimaryKey()
?? throw new ArgumentException($"The entity type {t} does not have a primary key in the {Context.GetType()} model.");
var stamps = new[] { "timestamp", "rowversion" };
EntityProperties = EntityType
.GetProperties()
.Where(x => !stamps.Contains(x.GetColumnType().ToLower()))
.ToArray();
var conn = Context.Database.ProviderName;
Knowledge = SqlKnowledge.For(conn)
?? throw new ArgumentException($"The {conn} provider does not have registered SQL knowledge.");
}
private void GenerateEntityType(IEntityType entityType, bool useDataAnnotations)
{
GenerateKey(entityType.FindPrimaryKey(), useDataAnnotations);
var annotations = entityType.GetAnnotations().ToList();
RemoveAnnotation(ref annotations, RelationalAnnotationNames.TableName);
RemoveAnnotation(ref annotations, RelationalAnnotationNames.Schema);
RemoveAnnotation(ref annotations, ScaffoldingAnnotationNames.DbSetName);
if (!useDataAnnotations)
{
GenerateTableName(entityType);
}
var annotationsToRemove = new List <IAnnotation>();
var lines = new List <string>();
foreach (var annotation in annotations)
{
if (_annotationCodeGenerator.IsHandledByConvention(entityType, annotation))
{
annotationsToRemove.Add(annotation);
}
else
{
var methodCall = _annotationCodeGenerator.GenerateFluentApi(entityType, annotation);
var line = methodCall == null
#pragma warning disable CS0618 // Type or member is obsolete
? _annotationCodeGenerator.GenerateFluentApi(entityType, annotation, Language)
#pragma warning restore CS0618 // Type or member is obsolete
: _cSharpUtilities.Generate(methodCall);
if (line != null)
{
lines.Add(line);
annotationsToRemove.Add(annotation);
}
}
}
lines.AddRange(GenerateAnnotations(annotations.Except(annotationsToRemove)));
AppendMultiLineFluentApi(entityType, lines);
foreach (var index in entityType.GetIndexes())
{
GenerateIndex(index);
}
foreach (var property in entityType.GetProperties())
{
GenerateProperty(property, useDataAnnotations);
}
foreach (var foreignKey in entityType.GetForeignKeys())
{
GenerateRelationship(foreignKey, useDataAnnotations);
}
}
public async Task <TProjectedType> GetProjectedByIdAsync <T, TProjectedType>(
object id,
Expression <Func <T, TProjectedType> > selectExpression,
CancellationToken cancellationToken = default)
where T : class
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
if (selectExpression == null)
{
throw new ArgumentNullException(nameof(selectExpression));
}
IEntityType entityType = _dbContext.Model.FindEntityType(typeof(T));
string primaryKeyName = entityType.FindPrimaryKey().Properties.Select(p => p.Name).FirstOrDefault();
Type primaryKeyType = entityType.FindPrimaryKey().Properties.Select(p => p.ClrType).FirstOrDefault();
if (primaryKeyName == null || primaryKeyType == null)
{
throw new ArgumentException("Entity does not have any primary key defined", nameof(id));
}
object primayKeyValue = null;
try
{
primayKeyValue = Convert.ChangeType(id, primaryKeyType, CultureInfo.InvariantCulture);
}
catch (Exception)
{
throw new ArgumentException($"You can not assign a value of type {id.GetType()} to a property of type {primaryKeyType}");
}
ParameterExpression pe = Expression.Parameter(typeof(T), "entity");
MemberExpression me = Expression.Property(pe, primaryKeyName);
ConstantExpression constant = Expression.Constant(primayKeyValue, primaryKeyType);
BinaryExpression body = Expression.Equal(me, constant);
Expression <Func <T, bool> > expressionTree = Expression.Lambda <Func <T, bool> >(body, new[] { pe });
IQueryable <T> query = _dbContext.Set <T>();
return(await query.Where(expressionTree).Select(selectExpression).FirstOrDefaultAsync(cancellationToken));
}
public async Task <TEntity> GetEntityByIdAsync(object id, bool asNoTracking = false)
{
if (id == null)
{
throw new ArgumentNullException(nameof(id));
}
IEntityType entityType = _dbContext.Model.FindEntityType(typeof(TEntity));
string primaryKeyName = entityType.FindPrimaryKey().Properties.Select(p => p.Name).FirstOrDefault();
Type primaryKeyType = entityType.FindPrimaryKey().Properties.Select(p => p.ClrType).FirstOrDefault();
if (primaryKeyName == null || primaryKeyType == null)
{
throw new ArgumentException("Entity does not have any primary key defined", nameof(id));
}
object primayKeyValue = null;
try
{
primayKeyValue = Convert.ChangeType(id, primaryKeyType, CultureInfo.InvariantCulture);
}
catch (Exception)
{
throw new ArgumentException($"You can not assign a value of type {id.GetType()} to a property of type {primaryKeyType}");
}
ParameterExpression pe = Expression.Parameter(typeof(TEntity), "entity");
MemberExpression me = Expression.Property(pe, primaryKeyName);
ConstantExpression constant = Expression.Constant(primayKeyValue, primaryKeyType);
BinaryExpression body = Expression.Equal(me, constant);
Expression <Func <TEntity, bool> > expressionTree = Expression.Lambda <Func <TEntity, bool> >(body, new[] { pe });
IQueryable <TEntity> query = _dbContext.Set <TEntity>();
if (asNoTracking)
{
TEntity noTrackedEntity = await query.AsNoTracking().FirstOrDefaultAsync(expressionTree);
return(noTrackedEntity);
}
TEntity trackedEntity = await query.FirstOrDefaultAsync(expressionTree);
return(trackedEntity);
}
private void CompareColumns(CompareLog log, IEntityType entityType, DatabaseTable table)
{
var columnDict = table.Columns.ToDictionary(x => x.Name, _caseComparer);
var primaryKeyDict = table.PrimaryKey?.Columns.ToDictionary(x => x.Name, _caseComparer)
?? new Dictionary <string, DatabaseColumn>();
var efPKeyConstraintName = entityType.FindPrimaryKey().Relational().Name;
bool pKeyError = false;
var pKeyLogger = new CompareLogger(CompareType.PrimaryKey, efPKeyConstraintName, log.SubLogs, _ignoreList,
() =>
{
pKeyError = true; //extra set of pKeyError
_hasErrors = true;
});
pKeyLogger.CheckDifferent(efPKeyConstraintName, table.PrimaryKey?.Name ?? NoPrimaryKey,
CompareAttributes.ConstraintName, _caseComparison);
foreach (var property in entityType.GetProperties())
{
var pRel = property.Relational();
var colLogger = new CompareLogger(CompareType.Property, property.Name, log.SubLogs, _ignoreList, () => _hasErrors = true);
if (columnDict.ContainsKey(pRel.ColumnName))
{
if (!IgnorePrimaryKeyFoundInOwnedTypes(entityType.DefiningEntityType, table, property, entityType.FindPrimaryKey()))
{
var error = ComparePropertyToColumn(colLogger, property, columnDict[pRel.ColumnName]);
//check for primary key
if (property.IsPrimaryKey() != primaryKeyDict.ContainsKey(pRel.ColumnName))
{
if (!primaryKeyDict.ContainsKey(pRel.ColumnName))
{
pKeyLogger.NotInDatabase(pRel.ColumnName, CompareAttributes.ColumnName);
error = true;
}
else
{
pKeyLogger.ExtraInDatabase(pRel.ColumnName, CompareAttributes.ColumnName,
table.PrimaryKey.Name);
}
}
if (!error)
{
//There were no errors noted, so we mark it as OK
colLogger.MarkAsOk(pRel.ColumnName);
}
}
}
else
{
colLogger.NotInDatabase(pRel.ColumnName, CompareAttributes.ColumnName);
}
}
if (!pKeyError)
{
pKeyLogger.MarkAsOk(efPKeyConstraintName);
}
}
private void GenerateEntityType(IEntityType entityType, bool useDataAnnotations)
{
this.GenerateKey(entityType.FindPrimaryKey(), useDataAnnotations);
var annotations = entityType.GetAnnotations().ToList();
RemoveAnnotation(ref annotations, CoreAnnotationNames.ConstructorBinding);
RemoveAnnotation(ref annotations, RelationalAnnotationNames.TableName);
RemoveAnnotation(ref annotations, RelationalAnnotationNames.Schema);
RemoveAnnotation(ref annotations, ScaffoldingAnnotationNames.DbSetName);
if (!useDataAnnotations)
{
this.GenerateTableName(entityType);
}
var annotationsToRemove = new List <IAnnotation>();
var lines = new List <string>();
foreach (var annotation in annotations)
{
if (this._annotationCodeGenerator.IsHandledByConvention(entityType, annotation))
{
annotationsToRemove.Add(annotation);
}
else
{
var methodCall = this._annotationCodeGenerator.GenerateFluentApi(entityType, annotation);
var line = methodCall == null
? this._annotationCodeGenerator.GenerateFluentApi(entityType, annotation, Language)
: this._code.Fragment(methodCall);
if (line != null)
{
lines.Add(line);
annotationsToRemove.Add(annotation);
}
}
}
lines.AddRange(this.GenerateAnnotations(annotations.Except(annotationsToRemove)));
this.AppendMultiLineFluentApi(entityType, lines);
foreach (var index in entityType.GetIndexes())
{
this.GenerateIndex(index);
}
foreach (var property in entityType.GetProperties())
{
this.GenerateProperty(property, useDataAnnotations);
}
foreach (var foreignKey in entityType.GetForeignKeys())
{
this.GenerateRelationship(foreignKey, useDataAnnotations);
}
}
private static Expression GenerateSharedTableExpression(
IEntityType entityType, HashSet <IEntityType> sharingTypes, SelectExpression selectExpression, IQuerySource querySource)
{
if (sharingTypes.Count == 1 ||
!entityType.FindForeignKeys(entityType.FindPrimaryKey().Properties)
.Any(fk => fk.PrincipalKey.IsPrimaryKey() &&
fk.PrincipalEntityType != entityType &&
sharingTypes.Contains(fk.PrincipalEntityType)))
{
return(null);
}
var requiredNonPkProperties = entityType.GetProperties().Where(p => !p.IsNullable && !p.IsPrimaryKey()).ToList();
if (requiredNonPkProperties.Count > 0)
{
var discriminatorPredicate
= IsNotNull(requiredNonPkProperties[0], selectExpression, querySource);
if (requiredNonPkProperties.Count > 1)
{
discriminatorPredicate
= requiredNonPkProperties
.Skip(1)
.Aggregate(
discriminatorPredicate, (current, property) =>
Expression.AndAlso(
IsNotNull(property, selectExpression, querySource),
current));
}
return(discriminatorPredicate);
}
else
{
var allNonPkProperties = entityType.GetProperties().Where(p => !p.IsPrimaryKey()).ToList();
if (allNonPkProperties.Count == 0)
{
return(null);
}
var discriminatorPredicate
= IsNotNull(allNonPkProperties[0], selectExpression, querySource);
if (allNonPkProperties.Count > 1)
{
discriminatorPredicate
= allNonPkProperties
.Skip(1)
.Aggregate(
discriminatorPredicate, (current, property) =>
Expression.OrElse(
IsNotNull(property, selectExpression, querySource),
current));
}
return(discriminatorPredicate);
}
}
public override void AddEntity(Object dataContext, ODataResourceBase entry)
{
var context = (DbContext)dataContext;
EntityEntry entityEntry = context.Add(CreateEntity(context, entry));
AddInstanceAnnotation(entry, entityEntry);
IReadOnlyList <IProperty> keyProperties = _entityType.FindPrimaryKey().Properties;
for (int i = 0; i < keyProperties.Count; i++)
{
if (keyProperties[i].ValueGenerated == ValueGenerated.OnAdd)
{
entityEntry.Property(keyProperties[i].Name).IsTemporary = true;
}
}
}
/// <summary>
/// Получает свойство, которое хранит первичный ключ
/// </summary>
/// <typeparam name="TEntity">Тип сущности</typeparam>
/// <param name="entity">Сущность EF</param>
/// <returns>PropertyInfo поля, в котором хранится первичный ключ</returns>
private static PropertyInfo GetKeyProperty <TEntity>(this DbContext context, ref TEntity entity)
{
Type entityType = entity.GetType();
IEntityType metaEntityType = context.Model.FindEntityType(entityType);
string keyFieldName = metaEntityType.FindPrimaryKey().Properties.Select(x => x.Name).FirstOrDefault() ?? "id";
return(entityType.GetProperty(keyFieldName));
}
protected IEnumerable <string> GetPrimaryKeys(IEntityType entity)
{
var keys = entity.FindPrimaryKey();
return(keys?.Properties.
Select(x => this.GetFieldName(x)).
ToList());
}
public PrimaryKey(IEntityType entityType)
{
var key = entityType.FindPrimaryKey();
IsCompositeKey = key.Properties.Count > 1;
Keys = key.Properties.Select(prop => new Key(prop)).ToList();
}
public static (string schema, string table, List <string> keys) GetDatabaseInfo(IEntityType entity)
{
return(
schema : entity.Relational().Schema,
table : entity.Relational().TableName,
keys : entity.FindPrimaryKey().Properties.Select(x => x.Name).ToList()
);
}
public static TKey GetKey <TKey, T>(IPrincipalKeyValueFactory <T> keyValueFactory, IEntityType entityType, Func <string, string> valueSelector)
{
return((TKey)keyValueFactory.CreateFromKeyValues(
entityType.FindPrimaryKey().Properties
.Select(p =>
valueSelector(p.Relational().ColumnName)
.Deserialize(p.GetValueConverter()?.ProviderClrType ?? p.ClrType)).ToArray()));
}
private IEnumerable <string> GetPrimaryKeys(IEntityType entity)
{
//procurar as chaves através da entidade respectiva
var chave = entity.FindPrimaryKey();
//retornar o nome das chaves através das propriedades recuperadas
return(chave?.Properties.Select(x => this.GetNomeCampo(x)).ToList());
}
public EntityTrackingInfo(
[NotNull] IKeyValueFactorySource keyValueFactorySource,
[NotNull] QueryCompilationContext queryCompilationContext,
[NotNull] QuerySourceReferenceExpression querySourceReferenceExpression,
[NotNull] IEntityType entityType)
{
Check.NotNull(keyValueFactorySource, nameof(keyValueFactorySource));
Check.NotNull(querySourceReferenceExpression, nameof(querySourceReferenceExpression));
Check.NotNull(entityType, nameof(entityType));
Check.NotNull(queryCompilationContext, nameof(queryCompilationContext));
QuerySourceReferenceExpression = querySourceReferenceExpression;
_entityType = entityType;
_keyValueFactory = keyValueFactorySource.GetKeyFactory(_entityType.FindPrimaryKey());
_includedNavigationPaths
= queryCompilationContext
.GetTrackableIncludes(querySourceReferenceExpression.ReferencedQuerySource);
if (_includedNavigationPaths != null)
{
_includedEntityTrackingInfos = new Dictionary<INavigation, IncludedEntityTrackingInfo>();
foreach (var navigation
in _includedNavigationPaths.SelectMany(ns => ns))
{
if (!_includedEntityTrackingInfos.ContainsKey(navigation))
{
var targetEntityType = navigation.GetTargetType();
_includedEntityTrackingInfos.Add(
navigation,
new IncludedEntityTrackingInfo(
targetEntityType,
keyValueFactorySource.GetKeyFactory(targetEntityType.FindPrimaryKey())));
}
}
}
}