添加错误GET方法春天注明控制器 [英] Add Error on GET METHOD Spring annotated controller

问题描述

请帮助我，我想做的事情。

Please help me with what I want to do.

我有这样的场景：

1. 显示我的资产给用户列表。


2. 用户选择的资产，然后
   点击添加项目


3. 在我的requestmapping，在GET
   操作。我用的是服务类
   检查是否确实该资产仍然
   存在于DB


4. 如果不是，用户应该由一个通知
   信息。我用以下形式：错误
   标签

我的问题是，当我在方法签名中添加错误的对象，我得到这个错误的错误/ BindingResult说法没有宣布preceding模型属性

My problem is when I add the error object in the method signature, I got this error Errors/BindingResult argument declared without preceding model attribute

@RequestMapping(value = "/addItemsToAsset.htm", method = RequestMethod.GET)
    public String setupForm(@RequestParam("assetID") Long assetID,
            Errors error, ModelMap model) {
        AssetItemVo voAsset = null;

        if (assetID != null && assetID != 0) {
            //Get data for asset from DB using assetID
            List<AssetDraftTempVo> lstDraft = service.getAssetDraftByLngID(assetID);

            if (lstDraft.size() == 0) {
                voAsset = new AssetItemVo();
                // I wanted to add validation here.  If no data for asset id is found, I would like to add an error to the error object
                error.reject("123","Unable to find info for the asset in the database.");
            } else {
                AssetDraftTempVo voDraft = lstDraft.get(0);
                voAsset = new AssetItemVo();
                voAsset.setStrPlant(voDraft.getStrPlant());
                .
                . /*other DTO property here*/
                .
            }
        }
        model.put("assetItemDetail", voAsset);
        return "additemstoasset";
    }

我的目标是，表单的显示过程中，我想填充错误对象马上（如果有错误）

My goal is that during the display of the form, I wanted to populate the error object right away (if there is an error)

下面是我为清楚起见形式。

Here's my form for clarity.

<form:form modelAttribute="assetItemDetail"  method="post">
    <div id="error_paragraph">
        <form:errors path="*" cssClass="errors" />
    </div>
</form:form>

要得到过去的错误，我手动更改方法签名，并且增加了模型属性，但它仍然无法填充表单：错误标签

To get past the error, I manually change the method signature and added the model attribute but it still cannot populate the form:error tag

@RequestMapping(value = "/addItemsToAsset.htm", method = RequestMethod.GET)
public String setupForm(@RequestParam("assetID") Long assetID,
        @ModelAttribute("assetItemDetail") AssetItemVo voAssetData, Errors error,
        ModelMap model) 

请帮助..

推荐答案

如果你想用未present在一个模型属性关联一个 BindingResult 方法签名，可以手动做到这一点：

If you want to associate a BindingResult with a model attribute that doesn't present in the method signature, you can do it manually:

BindingResult result = new Errors();
...
model.put(BindingResult.MODEL_KEY_PREFIX + "assetItemDetail", result); 
model.put("assetItemDetail", voAsset); 

这篇关于添加错误GET方法春天注明控制器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！