Storing Auto-generated TS Vector from Unmapped Fields

Aperta
  • Qualcosa non va?
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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
25/100
Tipo di issue
Funzionalità
Chiarezza
Abbastanza chiara
Stato di attività
Ferma
Stack tecnologico
csharp, postgresql
Ambito
databases

Direzione di ricerca

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.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

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)
Lingua principale
C#
Stelle
1.8k
Fork
268
Merge medio
2h 35m
PR unite (30g)
136

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