I have question regarding redirection in Grails web-flow.
I am in a view state which will allow users to enter the answers for a question. On 2 wrong attempts I should be able to re-direct the user to view page from different controller. What i mean is
challengeQuestionOne{
onRender() {
//Display question
}
on('next') {BuildQuestion command ->
bindData(flow.recovery,command)
[return the model to flow]
if(command.hasErrors()) {
flow.command = command
return error()
}
if(check for status. If doesnot pass){
flash.message=message(code:'loginForm.account.locked', default: 'Please Contact Admin.')
redirect(controller : "login",action: "login")//how to redirect from here to diff controller
}
if (//compare answer entered) {
}
else{
//set status not active
}
}.to("challengeQuestionTwo")
on(Exception).to("error")
on('cancel').to('finish')
}
I have tried to redirect from onRender . It was redirecting to the page. But how do I display the error msg on the redirected page. How can i forward the error message from one controller to other??
Ivo Houbrechts wrote an excelent tutorial about grails webflow:
Webflow defines its own flash scope. Although it has the same semantics as the standard grails flash scope (the main purpose is to store objects only until after the next request), it is a different scope. This means that objects stored in webflow's flash scope are not visible in standard grails actions.
import org.springframework.web.context.request.RequestContextHolder
....
RequestContextHolder.currentRequestAttributes().flashScope.message = "YourMessage"
You can read more here:
http://livesnippets.cloudfoundry.com/docs/guide/
Flash scope will not work in this case as expected.
Try to use another approach to show error. E.g. you can pass parameters with redirect. Or you can throw some exception and check it on rendered page as follow:
<g:if test="${flowExecutionException}">
<div class="error"><g:message code="loginForm.account.locked"/></div>
</g:if>
Related
So I followed the Kontent doc from the github which allows to retrieve content from a link (https://github.com/Kentico/kontent-delivery-sdk-net/wiki/Resolving-links-to-content-items)
First I implement a resolver to redirect when we click on the link like this :
public class CustomContentLinkUrlResolver : IContentLinkUrlResolver
{
public string ResolveBrokenLinkUrl()
{
return "/404";
}
public string ResolveLinkUrl(ContentLink link)
{
switch(link.ContentTypeCodename)
{
case "author":
return $"/author/{link.UrlSlug}";
default:
return $"/not_found";
}
}
}
Then I register my resolver within a IDeliveryClient
client = DeliveryClientBuilder
.WithProjectId(myid)
.WithContentLinkUrlResolver(new CustomContentLinkUrlResolver())
.Build();
At this moment if i click on the link it will redirect to /author/linkName with an error on the page what I think is normal
I don't get the last part of the doc (how just by doing a getString on the contentItem the link will work ?) so I would like to know how to display the content on the redirect page
I don't know if i was clear enough and sorry for my english
Here is the error thrown on the redirect page
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.
The last part of the wiki article refers to something that you already have:
At this moment if i click on the link
If you have a link that you can click on, then you have done what that part of the article describes.
What you need is to resolve the request. If you are getting a 404 that you expect, then you know that you need to add a route to your application to handle the request. In the handler (a controller, a component, etc.) extract the urlSlug from the route and use it with a IDeliveryClient to retrieve the item and then render the content. You will need to filter the GetItems call with something like new EqualsFilter("elements.urlSlug", urlSlug).
My problem is that i want to preview data on index view without saving data in database. For this purpose, I want to send the list of objects in params section of redirect. And on receiving action want to use that list of objects.But when i include as below
def preview(){
//some code
redirect action: "index", params:[planId:params.planId, beamsInfoList: beamsInfoList]
}
I want something like below to happen.
def index() {
//some code
try{
planInfo.beamInfo = (params.beamsInfoList==null)?planInfo.beamInfo:params.beamsInfoList //beamInfo is also list
//some code
Object[] obj = GRMUtils.calculateTotalBeamsPower(planInfo.beamInfo)
totalPlanPower = (Float)obj[0];
beamPowerMap= (Map<Integer, String>)obj[1];
AmMapUtility utility=new AmMapUtility()
output = utility.generateAMmapFromBeams(planInfo.beamInfo, GRMConstants.POWER_MAP_PAGE);
if(null==output){
flash.error = message(code: 'beammap.noinfoerror.message')
}
}catch(Exception e){
log.error "Excepton occured while loading Power Map", e
}
respond beams, model:[centerLong:output.getCenterLongitude(),centerLat:output.getCenterLatitude(),amMapImageProperty:output.getMapImages(),
amMapLinesProperty:output.getMapLines(), planId:params.planId, planInfo:planInfo, powersControlCarrier: powersControlCarrier, powersTrafficCarrier:powersTrafficCarrier,satPower: planInfo.satellite.satelliteMaxPower, totalPlanPower: totalPlanPower, gatewayPower: planInfo.gateway.gatewayAggregateEIRP,fesOutputPowerLimit:fesOutputPowerLimit, beamPowerMap: beamPowerMap,powerRangeColorMap:output.getReuseColorMap()]
}
It does not redirect to index method and not showing any errors. Both actions are in same controller. I have used flash, but its not helping either as value reflected on second request. I have tried session too, but i am getting error
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
on some DB fetch. I am stuck. I am new to grails and groovy. Please help.
Edit: i have found my list is large, that is why its not redirecting. Please help me with another alternative like how can i use request attribute if it is possible?
I think i have solved the problem. Its working now. All i need to do is to use the request setattribute as
request.beams = beams
And no need to pass the list in params of redirect, which i was earlier used to do. Instead of using redirect, i used forward as below:
request.beams = beams
forward action: "index", params:[planId:params.planId]
I have a Grails application with two webflows:
One for Purchasing
Another for getting in Contact with us
The issue:
It can happen that a user has a number of steps taken in a purchase wizard (via a webflow), he/she then decides they have a question and try to contact us (also via a webflow). So the user clicks on the 'contact-us' link on our navigation menu but they get brought back to the last step they were on in the purchase flow. Personally I assume it's got to do with the 'execution' key in the session which every link gets postfixed with i.e.
...../contact_us/index?execution=e1s1
The solution I would like:
I would like (in the above case), if the user decides himself to swap from the 'purchase flow' to the 'contact-us flow' that the 'purchase flow' gets invalidated/removed and the user begins from scratch in the 'contact-us flow'.
Grails version 2.2.3
Webflow plugin: 2.0.8.1
Attempted Solution
The best solution I could come up with (without doing something too ugly) was to create a filter that intercepts when a link has been clicked to start a new flow and attempts to remove the other one. However, in this example it surprisingly fails to find the flow in the flow repository (nullpointer).
FlowExecutionLock flowExecutionLock = null;
SessionBindingConversationManager conversationManager = applicationContext.getBean('conversationManager');
DefaultFlowExecutionRepository flowExecutionRepository = applicationContext.getBean("flowExecutionRepository");
try {
String executionKey = params.get("execution");// executionKey is something like 'e1s1'
FlowExecutionKey flowExecutionKey = flowExecutionRepository.parseFlowExecutionKey(executionKey);
flowExecutionLock = flowExecutionRepository.getLock(flowExecutionKey);
flowExecutionLock.lock();
FlowExecution execution = flowExecutionRepository.getFlowExecution(flowExecutionKey);
flowExecutionRepository.removeFlowExecution(execution);
} catch (FlowExecutionRepositoryException e) {
log.warn("Could not find flow in repository with id ${executionKey} " + e.getMessage());
} catch (NullPointerException e) {
log.warn("Could not find flow in repository with id ${executionKey} " + e.getMessage());
} finally {
if (flowExecutionLock != null) {
flowExecutionLock.unlock();
}
}
Ideas?
Has anybody got any ideas how I could do this. Swapping between two flows (where one is incomplete) in a session should be possible right? I'd like a clean solution to this rather than tweaking the flows themselves.
I seem to have found a workaround, in the g:link tag (where I create the link to the flow) I don't always make the habit of adding the action "index" as in Grails it goes there by default but it seems when I added it, I was able to swap between flows seamlessly.
<g:link absolute="true" controller="contact_us" action="index">
I am not sure if the old flows are removed from the flow repository. I have tried clicking between the two flows 70-80 times and nothing seems to be appearing in the log. If I do get any issues I'll come back and update the answer.
I'm using the spring security plugin in a Grails app. There are two reasons why the login page gets displayed
The user navigated to it directly
The user tried to access a page that is only available to logged-in users
In the case of (2) only, I want to display a message like "you attempted to access a page that requires login", but in the GSP code of the login page I can't find a way to distinguish between (1) and (2), is this possible?
When you get redirected, Spring Security stores a SavedRequest in the session under the SPRING_SECURITY_SAVED_REQUEST_KEY key, so you could check for the existence of that in auth.gsp:
<g:if test='${session.SPRING_SECURITY_SAVED_REQUEST_KEY}'>
// display "you attempted to access a page that requires login"
</g:if>
<g:else>
// direct access to login
</g:else>
You could change the url of of the various spring security configurations to point to a controller, and then have it branch based on info in the session. In a 1.3.7 project is did something like
security {
authenticationFailureUrl = '/logout/doLogout'
afterLogoutUrl = '/logout/doLogout'
}
then had
class LogoutController {
def doLogout = {
def wasHere = session.getAttribute('some-attribute-you-set')
if (wasHere) render view: 'requirelogin'
else render view: 'normallogin'
}
}
I have an application where users can browse maps in two ways (like thumbnails and in a list)
/map/browse
/map/list
Now, I would like to restrict these views to just show maps of a specific user, for example through
/user/3/browse
/user/3/list
So I created the mapping:
"/user/$userId/browse" {
controller = "map"
action = "browse"
}
"/user/$userId/list" {
controller = "map"
action = "list"
}
Now, I can go to /user/3/browse, but as soon as I click on a pagination link or change the pagination filters, the URL goes back to /map/browse.
Also, if I set the userId to null in the controller, I get the error:
Error 500: Error processing GroovyPageView: Error executing tag : Unable to create URL for mapping [/user/(*)/list] and parameters [["action":"list", "controller":"map", "max":20, "offset":0, "sort":"uploadDate", "order":"desc", "userId":null, "totalMaps":30]]. Parameter [userId] is required, but was not specified! at /views/map/browse.gsp:26
The pagination works as follows:
<div class="paginateButtons">
<g:paginate controller="map" action="browse" total="${mapInstanceTotal}"></g:paginate>
</div>
What can I do against that or what would be the correct way of implementing what I want?
I don't necessarily need to have that URL mapping, I only need a nice way of saying: "Display maps of only one user"
It seems that the problem is not at your URL mapping configuration ,but in your way to create link. I think it's better if you use Named URL Mapping : it's clearer than your approach now, and when create link for pagination you only need to specify the url name. For example:
In UrlMappings.groovy:
static mappings = {
name accountDetails: "/details/$acctNumber" {
controller = 'product'
action = 'accountDetails'
}
}
In view - gsp page:
<g:link mapping="accountDetails" params="[acctNumber:'8675309']">
Show Account
</g:link>