在 Spring Roo 2.0 中，使用 JSON 更新 object 会创建一个新的

Question

在 Spring Roo 2.0 中，使用 JSON 更新 object 会创建一个新的。

当我尝试使用 JSON 更新 object 时，我在数据库中得到了一个新的 object，而不是更新原来的 object。我做错了什么吗？

更改前的工单。设备引用字段为空，所以我想更改它。

{
    "id": 26,
    "version": 0,
    "ticketNumber": "Ticket 1",
    "ticketName": "T1 name",
    "location": "somewhere",
    "description": "desc",
    "customerName": null,
    "projectNumber": "Project 1",
    "opportunity": null,
    "marketSegment": null,
    "createdBy": "me",
    "plannedCreateDate": 1496556000000,
    "createDate": 1496556000000,
    "ticketStatus": "SUBMITTED",
    "ticketObjective": null,
    "equipment": null,
    "ticketResult": null,
    "ticketConclusion": null,
    "pivotuser": null
}

要更改 object，我正在使用：方法=PUT，url=”http://localhost:8000/json/tickets/26” Headers: Content-Type=application/json, 接受=application/json Body:

{
    "ticketNumber": "Ticket 1",
    "ticketName": "T1 name",
    "location": "somewhere",
    "description": "desc"
    "customerName": null,
    "projectNumber": "Project 1",
    "opportunity": null,
    "marketSegment": null,
    "createdBy": "me"
    "plannedCreateDate": 1496556000000,
    "createDate": 1496556000000,
    "ticketStatus": "SUBMITTED",
    "ticketObjective": null,
    "equipment": 3,
    "ticketResult": null
    "ticketConclusion": null,
    "pivotuser": null
}

响应：200

再次取票：

"content": [
    {
        "id": 26,
        "version": 0,
        "ticketNumber": "Ticket 1",
        "ticketName": "T1 name",
        "location": "somewhere",
        "description": "desc",
        "customerName": null,
        "projectNumber": "Project 1",
        "opportunity": null,
        "marketSegment": null,
        "createdBy": "me",
        "plannedCreateDate": 1496556000000,
        "createDate": 1496556000000,
        "ticketStatus": "SUBMITTED",
        "ticketObjective": null,
        "equipment": null,
        "ticketResult": null,
        "ticketConclusion": null,
        "pivotuser": null
    },
    {
        "id": 27,
        "version": 0,
        "ticketNumber": "Ticket 1",
        "ticketName": "T1 name",
        "location": "somewhere",
        "description": "desc",
        "customerName": null,
        "projectNumber": "Project 1",
        "opportunity": null,
        "marketSegment": null,
        "createdBy": "me",
        "plannedCreateDate": 1496556000000,
        "createDate": 1496556000000,
        "ticketStatus": "SUBMITTED",
        "ticketObjective": null,
        "equipment": {
            "id": 4,
            "version": 0,
            "manufacturer": "manufacturer 1",
            "masterNumber": "master number 1",
            "ticket": {
                "id": 27,
                "version": 0,
                "ticketNumber": "Ticket 1",
                "ticketName": "T1 name",
                "location": "somewhere",
                "description": "desc",
                "customerName": null,
                "projectNumber": "Project 1",
                "opportunity": null,
                "marketSegment": null,
                "createdBy": "me",
                "plannedCreateDate": 1496556000000,
                "createDate": 1496556000000,
                "ticketStatus": "SUBMITTED",
                "ticketObjective": null,
                "equipment": 4,
                "ticketResult": null,
                "ticketConclusion": null,
                "pivotuser": null
            }
        },
        "ticketResult": null,
        "ticketConclusion": null,
        "pivotuser": null
    }

工单 26 没有改变。工单 27 是在设备参考 = 4 的情况下创建的。我究竟做错了什么。这是我的第一个 JSON 项目。

Answer 1

只需在 JSON 请求正文中包含 id 和 version 字段。如果缺少任何一项，JPA EntityManager 将创建一个新项（如您所见）。

祝你好运！

在 Spring Roo 2.0 中，使用 JSON 更新 object 会创建一个新的

In Spring Roo 2.0, using JSON to update an object creates a new one instead

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