Question

当我尝试手动创建数据模型的元数据时，我遇到了一些问题。更具体地说，我使用以下命令创建元数据的字符串表示形式，然后将其保存到本地文件。

var metadata = JObject.Parse(new EFContextProvider<HelixDtoContext>().Metadata());

但是，当我这样做的时候，有一些缺失的信息。以下Dto

public class LayoutManagerState
{
    public string Widgets { get; set; }
}


public class AppState
{
    public int Id{ get; set; }
    public ViewOptionsDialogState ViewOptionsDialogState { get; set; }
    public LayoutManagerState LayoutManagerState { get; set; }
    ...
}

我希望元数据包含LayoutManagerState复杂属性;但它并没有这样做。

"entityType": [
  {
    "name": "AppState",
    "key": {
      "propertyRef": {
        "name": "Id"
      }
    },
    "property": [
      {
        "name": "Id",
        "type": "Edm.Int32",
        "nullable": "false",
        "annotation:StoreGeneratedPattern": "Identity"
      },
      {
        "name": "ViewOptionsDialogState",
        "type": "Edm.Self.ViewOptionsDialogState",
        "nullable": "false"
      }
    ]
  },

如您所见，元数据中没有名称为LayoutManagerState的属性。

Answer 1

我无法重现您的失败。

我拿了一个现有的应用程序（其中一个Todo样本），然后放弃了你的两个课程：

public class LayoutManagerState {
    public string Widgets { get; set; }
}

public class AppState {
    public int Id{ get; set; }
    public LayoutManagerState LayoutManagerState { get; set; }
}

我将新DbSet添加到DbContext，如下所示：

public DbSet<AppState> AppStates { get; set; }

然后我查看通过线路发送的元数据...它看起来很好。以下是三个实体类型定义，顶部是复杂类型：

"complexType": {
  "name": "LayoutManagerState",
  "property": {
    "name": "Widgets",
    "type": "Edm.String",
    "maxLength": "4000",
    "fixedLength": "false",
    "unicode": "true"
  }
},
"entityType": [
  {
    "name": "AppState",
    "key": {
      "propertyRef": {
        "name": "Id"
      }
    },
    "property": [
      {
        "name": "Id",
        "type": "Edm.Int32",
        "nullable": "false",
        "annotation:StoreGeneratedPattern": "Identity"
      },
      {
        "name": "LayoutManagerState",
        "type": "Edm.Self.LayoutManagerState",
        "nullable": "false"
      }
    ]
  },
  {
    "name": "TodoItem",
    "key": {
      "propertyRef": {
        "name": "Id"
      }
    },
    "property": [
      {
        "name": "Id",
        "type": "Edm.Int32",
        "nullable": "false",
        "annotation:StoreGeneratedPattern": "Identity"
      },
      {
        "name": "Description",
        "type": "Edm.String",
        "maxLength": "30",
        "fixedLength": "false",
        "unicode": "true",
        "nullable": "false"
      },
      {
        "name": "IsDone",
        "type": "Edm.Boolean",
        "nullable": "false"
      }
    ]
  }
],

Breeze也很好地导入了它，正如这个测试所证明的那样：

manager.metadataStore.getEntityType('LayoutManagerState'); // returns the complex type

您认为差异的原因是什么？

在BreezeJS中手动创建元数据

1 个答案: