从视图中省略ModelAttribute [英] Omit ModelAttribute from view

问题描述

我有一个rest应用程序，它返回json/xml.我使用杰克逊和jaxb进行转换.一些方法需要接受query_string.我已经使用@ModelAttribute将query_string映射到一个对象中，但这将对象强制进入了我的视图.我不希望该对象出现在视图中.

I have a rest application that returns json/xml. I use jackson and jaxb for conversion. Some methods need to accept a query_string. I've used @ModelAttribute to map the query_string into an object, but this forces the object into my view. I do not want the object to appear in the view.

我想我需要使用@ModelAttribute以外的其他东西，但是我无法弄清楚如何进行绑定，但是不能修改视图.如果我省略@ModelAttribute批注，则该对象将在视图中显示为变量名称(例如:"sourceBundleRequest").

I think I need to use something other than @ModelAttribute, but I can't figure out how to do the binding, but not modify the view. If I omit @ModelAttribute annotation, the object appears in the view as the variable name (eg: "sourceBundleRequest").

示例网址:

http://localhost:8080/rest/sourcebundles/?updateDate=20100501&label=urgent

控制器方法:

@RequestMapping(value = {"", "/"}, method = RequestMethod.GET)
public String getAll(@ModelAttribute("form") SourceBundleRequest sourceBundleRequest, BindingResult result, ModelMap model) throws ApiException {
    // Detect and report errors.
    if (result.hasErrors()) {
       // (omitted for clarity)
    }

    // Fetch matching data.
    PaginatedResponse<SourceBundle> sourceBundleResponse = null;
    try {
        int clientId = getRequestClientId();
        sourceBundleResponse = sourceBundleService.get(clientId, sourceBundleRequest);
    } catch (ApiServiceException e) {
        throw new ApiException(ApiErrorType.INTERNAL_ERROR, "sourceBundle fetch failed");
    }

    // Return the response.
    RestResponse<PaginatedResponse> restResponse = new RestResponse<PaginatedResponse>(200, "OK");
    restResponse.setData(sourceBundleResponse);
    model.addAttribute("resp", restResponse);
    // XXX - how do I prevent "form" from appearing in the view?
    return "restResponse";
}

示例输出:

"form": {
    "label": "urgent",
    "updateDate": 1272697200000,
    "sort": null,
    "results": 5,
    "skip": 0
},
"resp": {
    "code": 200,
    "status": "OK",
    "data": {
        "totalAvailable": 0,
        "resultList": [ ]
    }
}

所需的输出:

"resp": {
    "code": 200,
    "status": "OK",
    "data": {
        "totalAvailable": 0,
        "resultList": [ ]
    }
}

省略@ModelAttribute("form")

如果我只是省略了@ModelAttribute("form")，我仍然会收到不期望的响应，但是传入的表单是由对象名称命名的.响应如下所示:

If I simply omit @ModelAttribute("form"), I still get the undesirable response but the incoming form is named by the object name. The response looks like this:

"resp": {
    "code": 200,
    "status": "OK",
    "data": {
        "totalAvailable": 0,
        "resultList": [ ]
    }
},
"sourceBundleRequest": {
    "label": "urgent",
    "updateDate": 1272697200000,
    "sort": null,
    "results": 5,
    "skip": 0
}

推荐答案

我不知何故错过了解决此问题的最明显方法.我专注于属性，却忘记了我只能修改基础Map.

Somehow I missed the most obvious way to fix this. I was focused on the Attributes and forgot that I can just modify the underlying Map.

  // Remove the form object from the model map.
  model.remove("form");

按照Biju的建议省略@ModelAttribute，然后删除sourceBundleRequest对象，可能会更有效率.我怀疑@ModelAttribute有一些额外的开销.

It might be a little more efficient to omit @ModelAttribute as Biju suggested and then remove the sourceBundleRequest object. I suspect @ModelAttribute has some additional overhead.

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