实体集合属性为空从RavenDB时加载 [英] Entity Collection Property is Empty when Loading from RavenDB

问题描述

我今天开始使用RavenDB。当我保存一个类时，我可以看到在DB集合属性：

然而，当我加载类，集合中有没有项目：

 公开的IEnumerable< CustomVariableGroup> GETALL（）
 {
使用（IDocumentSession会话= Database.OpenSession（））
 {
 IEnumerable的< CustomVariableGroup>组= session.Query< CustomVariableGroup>（）; 
组的回报; 
} 
} 
  

有一些类型的激活深度，需要以看到设置？是波苏斯属性。

编辑（显示类，按要求）：

 公共类EntityBase：NotifyPropertyChangedBase 
 {
公共字符串ID {搞定;组; } //必填字段与RavenDB的所有对象。 
} 
 
公共类CustomVariableGroup：EntityBase 
 {
私人的ObservableCollection< CustomVariable> _customVariables; 
 
公众的ObservableCollection< CustomVariable> CustomVariables 
 {
得到
 {
如果（this._customVariables == NULL）
 {
 this._customVariables =新的ObservableCollection< CustomVariable>（）; 
} 
返回this._customVariables; 
} 
} 
} 
 
公共类CustomVariable：EntityBase 
 {
私人字符串_key; 
私人字符串_value; 
 
 ///<总结> 
 ///获取或设置键。 
 ///< /总结> 
 ///< VALUE> 
 ///的关键。 
 ///< /值> 
公共字符串键
 {
 {返回this._key; } 
 
组
 {
 this._key =价值; 
 NotifyPropertyChanged（（）=> this.Key）; 
} 
} 
 
 ///<总结> 
 ///获取或设置值。 
 ///< /总结> 
 ///< VALUE> 
 ///价值。 
 ///< /值> 
公共字符串值
 {
 {返回this._value; } 
 
组
 {
 this._value =价值; 
 NotifyPropertyChanged（（）=> THIS.VALUE）; 
} 
} 
} 
  

解决方案

明白了。有一对CustomVariables属性没有setter。当我加入私营制定者，它的工作。因此，显然RavenDB不使用私人支持字段，像db4o的一样。 。RavenDB需要属性

 公开的ObservableCollection< CustomVariable> CustomVariables 
 {
得到
 {
如果（this._customVariables == NULL）
 {
 this._customVariables =新的ObservableCollection< CustomVariable>（）; 
} 
返回this._customVariables; 
} 
 
私定
 {
 this._customVariables =价值; 
} 
} 
  

I started using RavenDB today. When I save a class, I can see the Collection property in the DB:

However, when I load the class, the collection has no items in it:

public IEnumerable<CustomVariableGroup> GetAll()
{
    using (IDocumentSession session = Database.OpenSession())
    {
        IEnumerable<CustomVariableGroup> groups = session.Query<CustomVariableGroup>();
        return groups;
    }
}

Is there some type of activation depth that needs to be set in order to see the properties that are POCOs?

Edit (to show the classes, by request):

public class EntityBase : NotifyPropertyChangedBase
{
  public string Id { get; set; }  // Required field for all objects with RavenDB.
}

    public class CustomVariableGroup : EntityBase
{
    private ObservableCollection<CustomVariable> _customVariables;       

    public ObservableCollection<CustomVariable> CustomVariables
    {
        get
        {
            if (this._customVariables == null)
            {
                this._customVariables = new ObservableCollection<CustomVariable>();
            }
            return this._customVariables;
        }
    }
}

    public class CustomVariable : EntityBase
{
    private string _key;
    private string _value;

    /// <summary>
    /// Gets or sets the key.
    /// </summary>
    /// <value>
    /// The key.
    /// </value>
    public string Key
    {
        get { return this._key; }

        set
        {
            this._key = value;
            NotifyPropertyChanged(() => this.Key);
        }
    }

    /// <summary>
    /// Gets or sets the value.
    /// </summary>
    /// <value>
    /// The value.
    /// </value>
    public string Value
    {
        get { return this._value; }

        set
        {
            this._value = value;
            NotifyPropertyChanged(() => this.Value);
        }
    }
}

解决方案

Got it. There was no setter on the CustomVariables property. As soon as I added the private setter, it worked. So, apparently RavenDB doesn't use the private backing field, like db4o does. RavenDB needs the property.

public ObservableCollection<CustomVariable> CustomVariables
{
    get
    {
        if (this._customVariables == null)
        {
            this._customVariables = new ObservableCollection<CustomVariable>();
        }
        return this._customVariables;
    }

    private set
    {
        this._customVariables = value;
    }
}

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