annotations/Azaion.Common/Database/AnnotationsDbSchemaHolder.cs

using LinqToDB;
using LinqToDB.Mapping;
using Newtonsoft.Json;

namespace Azaion.Common.Database;

public static class AnnotationsDbSchemaHolder
{
    public static readonly MappingSchema MappingSchema;

    static AnnotationsDbSchemaHolder()
    {
        MappingSchema = new MappingSchema();
        var builder = new FluentMappingBuilder(MappingSchema);

        var annotationBuilder = builder.Entity<Annotation>();
        annotationBuilder.HasTableName(Constants.ANNOTATIONS_TABLENAME)
            .HasPrimaryKey(x => x.Name)
            .Association(a => a.Detections, (a, d) => a.Name == d.AnnotationName)
            .Property(x => x.Time).HasDataType(DataType.Int64).HasConversion(ts => ts.Ticks, t => new TimeSpan(t));

        annotationBuilder
            .Ignore(x => x.Milliseconds)
            .Ignore(x => x.Classes)
            .Ignore(x => x.Classes)
            .Ignore(x => x.ImagePath)
            .Ignore(x => x.LabelPath)
            .Ignore(x => x.ThumbPath);

        builder.Entity<Detection>()
            .HasTableName(Constants.DETECTIONS_TABLENAME);

        builder.Entity<AnnotationQueueRecord>()
            .HasTableName(Constants.ANNOTATIONS_QUEUE_TABLENAME)
            .HasPrimaryKey(x => x.Id)
            .Property(x => x.AnnotationNames)
            .HasDataType(DataType.NVarChar)
            .HasConversion(list => JsonConvert.SerializeObject(list), str => JsonConvert.DeserializeObject<List<string>>(str) ?? new List<string>());

        builder.Entity<MediaFile>()
            .HasTableName(Constants.MEDIAFILE_TABLENAME);

        builder.Build();
    }
}