title: i put a value into an input type text but with null value in params.descrption.Why?
body: <p>this is the gsp code:</p>
  
  <pre><code>td align="left" class="pinkbox" style="height: 35px" width="43%"&gt;
  ${fieldValue(bean: bookInstance, field: "description")}&lt;br /&gt;
  input type="text" id="description" name="description" value="${fieldValue(bean: bookInstance, field: "description")}" size="30px"  /&gt;
  g:link controller="conference" action="edit" id="${bookInstance.id}"&gt;Update &lt;/g:link&gt;&lt;/td&gt;
  </code></pre>
  
  <p>groovy code in the controller:</p>
  
  <pre><code>def edit ={
    println params.description
    def bookInstance = Book.get(params.id)
    try{
      bookInstance.description = params.description
      bookInstance.save()
  
      redirect(action:'show',id:bookInstance.id)
    }catch(Exception e){
      flow.message ="an error occurred during update"
      redirect(action:'show',id:bookInstance.id)
    }
  }
  </code></pre>
  
  <p>it returns a null value while i insert a value inside the textbox control. i try omit value attribute from input type text but without any effect </p>