Storing Auto-generated TS Vector from Unmapped Fields

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Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
25/100
Tipo de issue
Funcionalidade
Clareza
Razoavelmente clara
Status de atividade
Estagnada
Stack de tecnologia
csharp, postgresql
Domínio
databases

Direção de pesquisa

Start with the HasGeneratedTsVectorColumn configuration shown in the issue and trace the failure through NpgsqlAnnotationProvider.For and the EF Core column-name lookup in the stack trace. Reproduce the model with the [NotMapped] source property and inspect the provider’s existing generated-tsvector tests. Done means the model can be created with the unmapped source property and the generated tsvector column works without storing the raw text.

Escrita pelo modelo de indexação a partir do texto da issue.

Descrição

I would like to store only a tsvector column in my PostgreSQL table without saving the original text itself. To achieve this, I have created a text variable in my model class and marked it with [NotMapped].

The model is configured so that the tsvector column is automatically generated based on the content of this unmapped text property. It would be very helpful if EF Core could support storing auto-generated tsvector columns derived from unmapped fields, allowing us to keep the tsvector for full-text search while avoiding storage of the raw text.

Model:

    [NotMapped]
    public required string FullTextSearch { get; set; }
    public NpgsqlTsVector FullSearchVector { get; set; }

Model Configuration:

builder.HasGeneratedTsVectorColumn(record => record.FullSearchVector, 
       "english",
        record => record.FullTextSearch);

Exception:

 System.NullReferenceException: Object reference not set to an instance of an object.
         at Microsoft.EntityFrameworkCore.Metadata.Internal.RelationalPropertyOverrides.Find(IReadOnlyProperty property, StoreObjectIdentifier& storeObject)
         at Microsoft.EntityFrameworkCore.RelationalPropertyExtensions.FindOverrides(IReadOnlyProperty property, StoreObjectIdentifier& storeObject)
         at Microsoft.EntityFrameworkCore.RelationalPropertyExtensions.GetColumnName(IReadOnlyProperty property, StoreObjectIdentifier& storeObject)
         at Npgsql.EntityFrameworkCore.PostgreSQL.Metadata.Internal.NpgsqlAnnotationProvider.<>c__DisplayClass2_1.<For>b__10(String p2)
         at System.Linq.Enumerable.SelectArrayIterator`2.Fill(ReadOnlySpan`1 source, Span`1 destination, Func`2 func)
         at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
         at Npgsql.EntityFrameworkCore.PostgreSQL.Metadata.Internal.NpgsqlAnnotationProvider.For(IColumn column, Boolean designTime)+MoveNext()
         at Microsoft.EntityFrameworkCore.Infrastructure.AnnotatableBase.AddAnnotations(AnnotatableBase annotatable, IEnumerable`1 annotations)
         at Microsoft.EntityFrameworkCore.Infrastructure.AnnotatableBase.AddAnnotations(IEnumerable`1 annotations)
         at Microsoft.EntityFrameworkCore.Metadata.Internal.RelationalModel.Create(IModel model, IRelationalAnnotationProvider relationalAnnotationProvider, IRelationalTypeMappingSource relationalTypeMappingSource, Boolean designTime)
         at Microsoft.EntityFrameworkCore.Metadata.Internal.RelationalModel.Add(IModel model, IRelationalAnnotationProvider relationalAnnotationProvider, IRelationalTypeMappingSource relationalTypeMappingSource, Boolean designTime)
         at Microsoft.EntityFrameworkCore.Infrastructure.RelationalModelRuntimeInitializer.InitializeModel(IModel model, Boolean designTime, Boolean prevalidation)
         at Microsoft.EntityFrameworkCore.Infrastructure.ModelRuntimeInitializer.Initialize(IModel model, Boolean designTime, IDiagnosticsLogger`1 validationLogger)
         at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, ModelCreationDependencies modelCreationDependencies, Boolean designTime)
         at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel(Boolean designTime)
         at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_DesignTimeModel()
         at Microsoft.EntityFrameworkCore.Metadata.Internal.DesignTimeModel.get_Model()
         at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlDatabaseCreator.CreateTablesAsync(CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Storage.RelationalDatabaseCreator.EnsureCreatedAsync(CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Storage.RelationalDatabaseCreator.EnsureCreatedAsync(CancellationToken cancellationToken)
Linguagem predominante
C#
Estrelas
1.8k
Forks
268
Merge médio
2h 35min
PRs com merge (30d)
136

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