Question

当运行exportEntities时，breeze通过删除它们的属性并将它们弹出到数组中来实现展平实体。在仅具有简单属性的实体中，这会阻止循环引用，因为不会复制entityAspect。但是，复杂的属性不会被展平，并且仍然具有此entityAspect，当breeze尝试调用JSON.stringify（）时会导致循环结构异常;

以下是一些复制此问题的代码：

var jsonMetadata = {
    "metadataVersion": "1.0.3",
    "dataServices": [
        {
            "serviceName": "api/Foo/",
            "hasServerMetadata": false,
            "jsonResultsAdapter": "webApi_default",
            "useJsonp": false
        }
    ],
    "structuralTypes": [
        {
            "shortName": "address",
            "namespace": "YourNamespace",
            "isComplexType": true,
            "dataProperties": [
                {  "name": "street", "dataType": "String" },
                {  "name": "city", "dataType": "String" },
                {  "name": "country", "dataType": "String" }
            ]
        },
        {
            "shortName": "person",
            "namespace": "YourNamespace",
            "dataProperties": [
                {  "name": "id", "dataType": "Int32", isPartOfKey: true },
                {  "name": "name", "dataType": "String" },
                {  "name": "hobbies", "dataType": "String" },
                {  "name": "address", "complexTypeName": "address:#YourNamespace" }
            ] }
    ]
};

var manager = new breeze.EntityManager();
manager.metadataStore.importMetadata(jsonMetadata)

var person = manager.createEntity('person', {id: 1});
person.address.street = "Sample Street";

console.log("Complex property is a circular datatype, cannot convert to JSON - that's fine")
// JSON.stringify(person.address); // fails with error

console.log("... except that manager.exportEntities() doesn't handle that case!");
manager.exportEntities(); // also fails

编辑：woops，糟糕的形式，遗漏了问题：这是一个错误吗？

Answer 1

这是一个错误，已在Breeze v 1.3.5中修复，现在可通过nuget和Breeze网站获得。

和...好的复制品。我们很感激。

Breeze.js - 复杂属性在em.exportEntities期间导致循环结构异常

1 个答案: