Storing Auto-generated TS Vector from Unmapped Fields

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#3,352 1 comentario 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
25/100
Tipo de issue
Nueva funcionalidad
Claridad
Bastante claro
Estado de actividad
Estancado
Stack tecnológico
csharp, postgresql
Área
databases

Línea de trabajo

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.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

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)
Lenguaje dominante
C#
Estrellas
1.8k
Forks
268
Merge medio
2 h 35 min
PR fusionados (30 d)
136

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