CODEWITHSUNDEEP
javajspliferayelportlet
Rohit Jain
Rohit Jain

Reputation: 213213

Passing values in `<portlet:param>` using EL

I'm trying to pass a parameter with <portlet:actionURL> to a portlet in liferay, but it turns out that, using EL to pass values in not working, however, using JSP expression tag is working fine.

Here's my relevant code:

<%
    ResultRow row = (ResultRow)request.getAttribute(WebKeys.SEARCH_CONTAINER_RESULT_ROW);

    Course course = (Course) row.getObject();
    long groupId = themeDisplay.getLayout().getGroupId();
    String name = Course.class.getName();
    String primaryKey = String.valueOf(course.getPrimaryKey());

%>

<liferay-ui:icon-menu>

    <c:if test="<%= permissionChecker.hasPermission(groupId, name, primaryKey, ActionKeys.UPDATE)%>">
        <portlet:actionURL name="editCourse" var="editURL">
            <portlet:param name="resourcePrimaryKey" value="${primaryKey}"/>
        </portlet:actionURL>

        <liferay-ui:icon image="edit" message="Edit" url="${editURL}" />
    </c:if>
</liferay-ui:icon-menu>

As you see, in <portlet:param> tag, I have used EL for passing value attribute. But it doesn't work, and I receive the value as 0 for "resourcePrimaryKey" in my action method, when I do:

long courseId = ParamUtil.getLong(request, "resourcePrimaryKey");
// courseId is 0 here

However, if I use JSP expression tag in place of EL, it works fine:

<portlet:actionURL name="editCourse" var="editURL">
    <portlet:param name="resourcePrimaryKey" value="<%= primaryKey %>"/>
</portlet:actionURL>

Now, I get the required value for "resourcePrimaryKey".

Can anyone figure what's going on here? Surprisingly, EL at other place work fine, as you see - ${editURL} value for url attribute, is working fine, and redirecting to the corresponding url.

I came across this thread on apache mail archive regarding the same issue, but that doesn't really solve the problem.

Upvotes: 3

Views: 5732

Answers (1)

Prakash K
Prakash K

Reputation: 11698

A variable in the scriptlet cannot be used directly in an EL, you would first need to set it like:

<c:set var="primKey"><%=primaryKey %></c:set>

and use ${primKey} or set it as a request attribute:

request.setAttribute("primKey", primaryKey);

Clearly, better would be to directly use the expression.

Also regarding the ${editURL} working, it is a portlet jsp tag which sets the variable in the page context so that it is available to the EL.

Our wiki is a good place to know these things, look out for the heading Make objects available to EL for this question :-)

Upvotes: 6

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