admin/Azaion.Common/Database/AzaionDbShemaHolder.cs

using Azaion.Common.Entities;
using LinqToDB;
using LinqToDB.Mapping;

namespace Azaion.Common.Database;

public static class AzaionDbSchemaHolder
{
    public static readonly MappingSchema MappingSchema;

    static AzaionDbSchemaHolder()
    {
        MappingSchema = new MappingSchema();

        MappingSchema.EntityDescriptorCreatedCallback = (_, entityDescriptor) =>
        {
            foreach (var entityDescriptorColumn in entityDescriptor.Columns)
                entityDescriptorColumn.ColumnName = entityDescriptorColumn.ColumnName.ToSnakeCase();
        };

        var builder = new FluentMappingBuilder(MappingSchema);

        builder.Entity<User>()
            .HasTableName("users")
            .Property(x => x.Id)
                .IsPrimaryKey()
                .HasDataType(DataType.Guid)
            .Property(x => x.Role)
                .HasDataType(DataType.Text)
                .HasConversion(v => v.ToString(), v => (RoleEnum)Enum.Parse(typeof(RoleEnum), v));

        builder.Build();
    }
}