the delete itself has no problem if called it directly.
From: Lukasz Lenart <[email protected]>
To: Struts Users Mailing List <[email protected]>
Sent: Monday, October 27, 2014 2:46 AM
Subject: Re: struts2 json return null if involve hibernate or spring
2014-10-27 3:55 GMT+01:00 john lee <[email protected]>:
> is hibernate dao manipulation could affect struts 2 json return?
> or spring framework could affect struts2 json return?
> my program's struts2 json execution is success if not involve dao or spring
> call.
> but if involve hibernate/spring/dao manipulation, then json return is null
> and not returned.
> struts.xml<package name="default" extends="json-default"> ... <action
> name="cart-del" class="CartAction" method="del">
> <result name="json-data" type="json"></result>
>
> </action>
> </package>
> Cart.jsp <sj:head jqueryui="true" jquerytheme="%{theme}"
> loadFromGoogle="%{google}" ajaxhistory="%{ajaxhistory}"
> defaultIndicator="myDefaultIndicator"/>
>
> <%@ taglib prefix="s" uri="/struts-tags" %>
> <%@ taglib prefix="sj" uri="/struts-jquery-tags"%> <script
>type="text/javascript">
> function delItem(sn) {
> alert("here10, sn="+sn);
> $.post('cart-del.action', {partid: sn}, function(data) {
> alert("here20, data.deleted="+data.deleted);
> if (data.deleted) {
> alert("here30 - deleted");
> $('#tr_' + sn).remove();
> } }
> else
> alert("here40 - not delete");
> });
> }
> </scipt><s:iterator value="#session.cartitems">
> <tr id="tr_${j_part_id}">
> <td><input type="checkbox" onclick="delItem('${j_part_id }')" /></td>
> <td>${part.pid}<input type="hidden" name="partids"
>value="${j_part_id}" />>/td>
> </tr>
> </s:iterator>
> CartAction.java
> public class AcctAction extends ActionSupport {
> private String partid;
> private boolean deleted;
> public void setPartid(String partid) { this.partid=partid.trim(); }
> public String getPartid() { return partid; }
> public boolean getDeleted() { return deleted; } public String del()
>throws Exception {
> /* problem is:
> if enable following business dao logic to delete item from
>database, the item is deleted,
> and this is proved from querying database,
> but deleted variable always 'not delete in the Cart.jsp
>alert statement.
> without business logic, then deleted can always return true;
>
> */
> /*
> CartManagerImpl cartmgr;
> cartmgr.dao_delete...
> */
>
> deleted=true;
> return "json-data";
> }
> }
> CartManagerImpl.javaimport org.apache.struts2.ServletActionContext;import
> org.springframework.web.context.WebApplicationContext;
> import
> org.springframework.web.context.support.WebApplicationContextUtils;public
> class CartManagerImpl {
> dao_delete ....
> }
Maybe you have some exception here or some other problem when deleting
that item?
Regards
--
Łukasz
+ 48 606 323 122 http://www.lenart.org.pl/
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