为Grails restfulcontroller添加功能 [英] Adding functionality to Grails restfulcontroller

问题描述

 类PersonController扩展了RestfulController< Person> {
 $ b $ staticResponseFormats = ['json'，'xml'] 
 
 PersonController（）{
 super（Person）
} 
 } 
  

然而，现在我想为此添加一个搜索选项。什么是Grails使之成为可能的方式？

我想添加以下内容：

  def search（Map params）{
 println params 
} 
  

但是，这让Grails（2.3）崩溃（|编译期间错误致命错误org.apache.tools.ant.BuildException：编译失败（使用--stacktrace查看完整跟踪））。

那么添加这个的正确方法是什么？我正在寻找一些解决方案，可以使用 http：// localhost：8080 / foo / person / search？q = erik

这是我的UrlMappings：

 静态映射= {
/ $ controller / $ $ {
约束{
 //在这里应用约束
} 
} 
 
 
/ rest / persons（resources：'Person'）
  

以上为：

  def search（）{
 println params 
} 
  

这并不会导致编译错误，但我仍然遇到这个错误：

 处理请求时发生TypeMismatchException：[GET] / declaratie-web / rest / medicaties / search  - 参数：
q：erik 
提供的类nl.Person的错误类型。预期：类java.lang.Long，得到类java.lang.String。 Stacktrace如下：
 org.hibernate.TypeMismatchException：为类nl.Person提供了错误类型的id。预期：类java.lang.Long，得到类java.lang.String 
  

我也发现无论我怎么打电话给控制器：

  http：// localhost：8080 / foo / person / search？q = erik 
 http：// localhost：8080 / foo / person / search222？q = erik 
 http：// localhost：8080 / foo / person / search39839329？q = erik 
  

所有失败都会出现上述错误，所以看起来我的方法被忽略了（可能是由于我的URL映射造成的）？

解决方案

你真的不会因为这样做而成为RESTful。 q 应该只是索引操作的一个参数。您可以覆盖该方法以包含您的功能。

  def index（整数最大值）{
 params.max =数学.min（max？：10，100）
 def c = Person.createCriteria（）
 def results = c.list（params）{
 //使用params.q 
} 
回应结果，模型：[personCount：results.totalCount] 
} 
  




I'm having a very simple restful controller, which looks like this:

class PersonController extends RestfulController<Person> {

    static responseFormats = ['json', 'xml']

    PersonController() {
        super(Person)
    }
}

However, now I want to add a search option to this. What is the Grails way of making this possible?

I thought of adding the following:

def search(Map params) {
    println params
}

But that makes Grails (2.3) crash (| Error Fatal error during compilation org.apache.tools.ant.BuildException: Compilation Failed (Use --stacktrace to see the full trace)).

So what is the right way of adding this? I'm looking for some solution which I can call using http://localhost:8080/foo/person/search?q=erik

This is my UrlMappings:

static mappings = {
    "/$controller/$action?/$id?(.${format})?"{
        constraints {
            // apply constraints here
        }
    }


    "/rest/persons"(resources:'Person')

I've changed the above to:

def search() {
    println params
}

And that doesn't give the compilation error anymore, but I still get this error:

TypeMismatchException occurred when processing request: [GET] /declaratie-web/rest/medicaties/search - parameters:
q: erik
Provided id of the wrong type for class nl.Person. Expected: class java.lang.Long, got class java.lang.String. Stacktrace follows:
org.hibernate.TypeMismatchException: Provided id of the wrong type for class nl.Person. Expected: class java.lang.Long, got class java.lang.String

I also found out that it doesn't matter how I call the controller:

http://localhost:8080/foo/person/search?q=erik
http://localhost:8080/foo/person/search222?q=erik
http://localhost:8080/foo/person/search39839329?q=erik

All fails with the above error, so it seems my method is ignored (maybe caused by my URLmapping?)

解决方案

You really aren't being RESTful by doing that. q should just be a parameter for the index action. You can override that method to include your functionality.

def index(Integer max) {
    params.max = Math.min(max ?: 10, 100)
    def c = Person.createCriteria()
    def results = c.list(params) {
       //Your criteria here with params.q
    }
    respond results, model:[personCount: results.totalCount]
}

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