无法在breezejs中保存关系实体

Question

我有两个通过 manager.createEntity(type); 创建的实体。如果我尝试以其他方式创建它们，z-validate 不会显示验证错误 ..entity orderdetails 必须具有来自 order 的有效密钥。后来...

...  //changed some stuff but never keys
orderdetails.Time = new Date();    
orderdetails.order = order;          //am i creating the relation right here?

该应用程序可以离线运行，但是当我将更改保存到服务器时..

manager.saveChanges([order,orderdetails]);

服务器正在返回

...orderdetails","KeyValues":["fd...28"],"PropertyName":"order",ErrorMessage":"The order field is required."

知道我该如何解决这个问题吗？我已经阅读文档好几天了。

元数据如下所示

{
    "schema": {
        "namespace": "Inventory.API",
        "alias": "Self",
        "annotation:UseStrongSpatialTypes": "false",
        "xmlns:annotation": "http://schemas.microsoft.com/ado/2009/02/edm/annotation",
        "xmlns:customannotation": "http://schemas.microsoft.com/ado/2013/11/edm/customannotation",
        "xmlns": "http://schemas.microsoft.com/ado/2009/11/edm",
        "cSpaceOSpaceMapping": "[\"Inventory.API.Order\",\"Inventory.API.Entities.Order\"],[\"Inventory.API.OrderDetail\",\"Inventory.API.Entities.OrderDetail\"],[\"Inventory.API.DifferentDetail\",\"Inventory.API.Entities.DifferentDetail\"]",
        "entityType": [ {
            "name": "Order",
            "customannotation:ClrType": "Inventory.API.Entities.Order, Inventory.API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
            "key": {
                "propertyRef": {
                    "name": "Id"
                }
            },
            "property": [{
                "name": "Id",
                "type": "Edm.Guid",
                "nullable": "false",
                "annotation:StoreGeneratedPattern": "Identity"
            }, {
                "name": "BarCode",
                "type": "Edm.String",
                "maxLength": "Max",
                "fixedLength": "false",
                "unicode": "true"
            }, {
                "name": "Name",
                "type": "Edm.String",
                "maxLength": "Max",
                "fixedLength": "false",
                "unicode": "true"
            }, {
                "name": "UnitPrice",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }, {
                "name": "Count",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }],
            "navigationProperty": [{
                "name": "OrderDetails",
                "relationship": "Self.OrderDetail_Order",
                "fromRole": "OrderDetail_Order_Target",
                "toRole": "OrderDetail_Order_Source"
            }, {
                "name": "DifferentDetails",
                "relationship": "Self.DifferentDetail_Order",
                "fromRole": "DifferentDetail_Order_Target",
                "toRole": "DifferentDetail_Order_Source"
            }]
        }, {
            "name": "OrderDetail",
            "customannotation:ClrType": "Inventory.API.Entities.OrderDetail, Inventory.API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
            "key": {
                "propertyRef": {
                    "name": "Id"
                }
            },
            "property": [{
                "name": "Id",
                "type": "Edm.Guid",
                "nullable": "false",
                "annotation:StoreGeneratedPattern": "Identity"
            }, {
                "name": "Time",
                "type": "Edm.DateTime",
                "nullable": "false"
            }, {
                "name": "UnitPrice",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }, {
                "name": "Count",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }, {
                "name": "TotalPrice",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }],
            "navigationProperty": {
                "name": "Order",
                "relationship": "Self.OrderDetail_Order",
                "fromRole": "OrderDetail_Order_Source",
                "toRole": "OrderDetail_Order_Target"
            }
        }, {
            "name": "DifferentDetail",
            "customannotation:ClrType": "Inventory.API.Entities.DifferentDetail, Inventory.API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null",
            "key": {
                "propertyRef": {
                    "name": "Id"
                }
            },
            "property": [{
                "name": "Id",
                "type": "Edm.Guid",
                "nullable": "false",
                "annotation:StoreGeneratedPattern": "Identity"
            }, {
                "name": "Time",
                "type": "Edm.DateTime",
                "nullable": "false"
            }, {
                "name": "UnitPrice",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }, {
                "name": "Count",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }, {
                "name": "TotalPrice",
                "type": "Edm.Decimal",
                "precision": "18",
                "scale": "2",
                "nullable": "false"
            }],
            "navigationProperty": {
                "name": "Order",
                "relationship": "Self.DifferentDetail_Order",
                "fromRole": "DifferentDetail_Order_Source",
                "toRole": "DifferentDetail_Order_Target"
            }
        }],
        "entityContainer": {
            "name": "InventoryContext",
            "customannotation:UseClrTypes": "true",
            "entitySet": [{
                "name": "Orders",
                "entityType": "Self.Order"
            }, {
                "name": "OrderDetails",
                "entityType": "Self.OrderDetail"
            }, {
                "name": "DifferentDetails",
                "entityType": "Self.DifferentDetail"
            }],
            "associationSet": [{
                "name": "OrderDetail_Order",
                "association": "Self.OrderDetail_Order",
                "end": [{
                    "role": "OrderDetail_Order_Source",
                    "entitySet": "OrderDetails"
                }, {
                    "role": "OrderDetail_Order_Target",
                    "entitySet": "Orders"
                }]
            }, {
                "name": "DifferentDetail_Order",
                "association": "Self.DifferentDetail_Order",
                "end": [{
                    "role": "DifferentDetail_Order_Source",
                    "entitySet": "DifferentDetails"
                }, {
                    "role": "DifferentDetail_Order_Target",
                    "entitySet": "Orders"
                }]
            }
    }
}

Answer 1

您需要映射 OrderDetail 和 DifferentDetail 实体的 orderId 外键属性。当 Breeze 将实体发送到服务器时，它使用外键传达实体之间的关系。

Answer 2

我需要映射 OrderDetail 和 DifferentDetail 实体的 orderId 外键属性。当 Breeze 将实体发送到服务器时，它使用外键传达实体之间的关系。

... 关系存在，但 breeze 看不到它，因为它是这样定义的

 [Required]
public Order Order { get; set; }

因此我把它改成了这个

 [Required]
public Guid Order_Id { get; set; }

[ForeignKey("Order_Id")]
public virtual Order Order{get; set;}

在 DBContext POCO 类中创建了一个新的元数据副本。

无法在breezejs中保存关系实体

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