CODEWITHSUNDEEP
ajaxgrails
Chris
Chris

Reputation: 470

Grails: Ajax response empty

I want to change the layout when there is an ajax request. So I setup an Filter for that:

class AjaxFilters {

def filters = {
    ajaxify(controller: '*', action: '*') {
        after = { Map model ->


    if(model==null) {
        model = new HashMap()
    }

    // only intercept AJAX requests
    if (!request.xhr) {
        model.put("layout", "mainUsers")
        return true 
    }

    // find our controller to see if the action is ajaxified
    def artefact = grailsApplication
        .getArtefactByLogicalPropertyName("Controller", controllerName)
    if (!artefact) { return true }

    // check if our action is ajaxified
    def isAjaxified = artefact.clazz.declaredFields.find {
        it.name == 'ajaxify'
    } != null


    def ajaxified = isAjaxified ? artefact.clazz?.ajaxify : []
    if (actionName in ajaxified || '*' in ajaxified) {
        model.put("layout", "ajax")
        return false
    }
    return true
        }
    }
}
}

This creates a view model named "layout" which should define what layout to use.

Here is an example view which uses the layout model:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
<meta name="layout" content="${layout}"/>
<title>Profile</title>
</head>
<body>
<h3>Edit Profile</h3>
</body>
</html>

This is the controller:

class SettingsController {
def springSecurityService
static ajaxify = ["profile", "account"]

def profile() {
    User user = springSecurityService.currentUser

    UserProfile profile = UserProfile.findByUser(user)

    if(profile == null) {
        flash.error="Profile not found."
        return
    }

    [profile: profile, user: user]
}
}

A normal request works as expected, but when I try an ajax one the response is completly empty. Only headers are sent.

Upvotes: 0

Views: 765

Answers (2)

schmolly159
schmolly159

Reputation: 3881

After your model.put("layout", "ajax") you don't want to return false but rather true. Returning false indicates the filter failed in some way and halts all further processing, which will result in an empty response being returned to the browser. If you return true, the updated model will continue through the processing chain and be rendered in your gsp.

Upvotes: 1

Ganesh Krishnan
Ganesh Krishnan

Reputation: 7395

You are returning true or false for ajax requests which will return blank. You should convert the model object as JSON using render function or convert the model object to JSON and return it. You don't need to check if action is ajaxified; just return the JSON object.

Upvotes: 1

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