c# - 使用 Umbraco.Core.Persistence 从带有枚举的模型创建数据库表

Question

如果这个表不存在，想在应用程序启动时创建它。

代码:

public class Database : ApplicationEventHandler
{
    protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
    {
        var db = applicationContext.DatabaseContext.Database;

        //Cant add this table due to the ENUM
        if (!db.TableExist("FormData"))
        {
            db.CreateTable<FormData>(false);
        }
    }
}

型号:

[PrimaryKey("Id")]
public class FormData
{
    [PrimaryKeyColumn(AutoIncrement = true, IdentitySeed = 1)]
    public int Id { get; set; }

    [NullSetting(NullSetting = NullSettings.NotNull)]
    public FormType Type { get; set; }

    [NullSetting(NullSetting = NullSettings.NotNull)]
    public string Data { get; set; }

    [NullSetting(NullSetting = NullSettings.NotNull)]
    public DateTime Date { get; set; }
}

错误信息:

[InvalidOperationException: Sequence contains no matching element] System.Linq.Enumerable.First(IEnumerable1 source, Func2 predicate) +415 Umbraco.Core.Persistence.SqlSyntax.SqlSyntaxProviderBase1.FormatType(ColumnDefinition column) +1225 Umbraco.Core.Persistence.SqlSyntax.SqlSyntaxProviderBase1.Format(ColumnDefinition column) +155 Umbraco.Core.Persistence.SqlSyntax.SqlSyntaxProviderBase1.Format(IEnumerable1 columns) +144 Umbraco.Core.Persistence.SqlSyntax.SqlSyntaxProviderBase`1.Format(TableDefinition table) +131 Umbraco.Core.Persistence.PetaPocoExtensions.CreateTable(Database db, Boolean overwrite, Type modelType) +161 Umbraco.Core.Persistence.PetaPocoExtensions.CreateTable(Database db, Boolean overwrite) +121

查看错误我认为没有更新核心的解决方案但是希望你们能提供帮助

Answer 1

根据@Ryios 给出的答案，我认为这样的事情很好:

/// <summary>
/// Don't use this to get or set.
/// This must however be kept as public or db.CreateTable()
/// will not insert this field into the database.
/// </summary>
[NullSetting(NullSetting = NullSettings.NotNull)]
[Column("type")]
public int _type { get; set; }

/// <summary>
/// This field is ignored by db.CreateTable().
/// </summary>
[Ignore]
public FormType Type
{
    get
    {
        return (FormType)_type;
    }
    set
    {
        _type = (int)value;
    }
}

在代码中，应该使用 Type 而不是 _type 以便枚举可以从中受益。 _type 仅作为插入数据库表的字段出现。