将数据从GSP传递给Grails中的控制器

问题描述

创建一个带有控件的GSP页面，具体取决于数据库中的行。

这取决于由< g：each in =$ {Vehicles }var =vehicle>
因此，如果有3辆车，则会生成3行文本框。 （最多可以是200）

 < g：form action =update> 
< label for =SearchTerm> $ {term}< / label> 
 
 < tr> 
< td> < label for =Name> $ {vehicle.name}< / label> < / TD> 
< td>< g：textField name =$ {vehicle.id} .ModelNo/> < / TD> 
< td>< g：textField name =$ {vehicle.id} .Year/> < / TD> 
< / tr> 
< / g：每个> 
< td> < g：submitButton name =updatevalue =Update/>< / td> 
< / g：表格> 
  

我该如何将这个值传递给我的控制器，然后我可以保存/更新数据到数据库。或者有没有简单的方法来实现这种情况？

解决方案

您需要在GSP中使用这样的代码

 < g：form action =update> 
< label for =SearchTerm> $ {term}< / label> 
 
 < tr> 
< td> < label for =Name> $ {vehicle.name}< / label> < / TD> 
< td>< g：hiddenField name =vehicle [$ {i}] .idvalue =$ {vehicle.id}/> 
< g：textField name =vehicle [$ {i}]。ModelNovalue =$ {vehicle.ModelNo}/> < / TD> 
< td>< g：textField name =vehicle [$ {i}]。年value =$ {vehicle.Year}/> < / TD> 
< / tr> 
< / g：每个> 
< td> < g：submitButton name =updatevalue =Update/>< / td> 
< / g：表格> 
  

控制器需要有一个具有列表属性的域或具有列表属性的命令对象

  SearchCommand {
 List< Vehicle> vehicle = new Arraylist< Vehicle>（3）; 
 
 $ / code> 

然后在控制器中（如果使用命令对象）

  def save = {SearchCommand searchCmd-> 
 searchCmd.vehicle.each {vehicle  - > 
 / * Process Vehicle * / 
} 
} 
  

帮助


I create a GSP page with controls depending on the rows in a database.
This depends on the value returned by the <g:each in="${Vehicles}" var="vehicle">So, if there are 3 vehicles, 3 rows with text boxes will be generated. (The maximum can be 200)

<g:form action="update" >
      <label for="SearchTerm">${term}</label>

          <g:each in="${Vehicles}" var="vehicle">
            <tr>
                     <td> <label for="Name">${vehicle.name}</label> </td>
                     <td><g:textField name="${vehicle.id}.ModelNo" /> </td>
                     <td><g:textField name="${vehicle.id}.Year" /> </td>
            </tr>
          </g:each>
  <td> <g:submitButton name="update" value="Update"/></td>
  </g:form>

How can I basically pass this value to my controller so that I can then save/update the data to the database. or Is there any easy way to achieve this scenario?

解决方案

You need some code like this in the GSP

    <g:form action="update" >
          <label for="SearchTerm">${term}</label>

              <g:each in="${Vehicles}" var="vehicle" status="i">
                <tr>
                         <td> <label for="Name">${vehicle.name}</label> </td>
                         <td><g:hiddenField name="vehicle[${i}].id" value="${vehicle.id}"/>
<g:textField name="vehicle[${i}].ModelNo" value="${vehicle.ModelNo}"/> </td>
                         <td><g:textField name="vehicle[${i}].Year" value="${vehicle.Year}"/> </td>
                </tr>
              </g:each>
      <td> <g:submitButton name="update" value="Update"/></td>
    </g:form>

The Controller needs to either have a Domain with a List Property or a Command Object with a List Property ie

SearchCommand {
  List<Vehicle> vehicle = new Arraylist<Vehicle>(3);
}

Then in the controller (if using the command object)

def save = {SearchCommand searchCmd->
  searchCmd.vehicle.each {vehicle ->
     /* Process Vehicle */
  }
}

Hope that Helps

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