How to set url rewrite mechanism in groovy grails? Please let me know by step by step. Please help me.
Have used this is grails? This works similar to htaccess. They have a comparison on this. So, think, we should be able to write a generic rule, for the redirects. Could you please check and see.
"/**-spid-$PROP_ID" { //Property Details Page
namespace = "propertydetails"
controller = "Desktop"
action = "show"
constraints {
PROP_ID(nullable: false, blank: false, validator: { val, obj ->
if (!(PdValidatorUtil.ValidatePropId(val))) {
return false
}
})
}
}
I have used the above url mappings in my code. It represents for url of type www.aaa.com/washington-spid-per4566 it should call show method of DesktopController in propertyDetails namespace.Under constraints i specify the contraints on my propid variable i.e. format kinda things. follow the below links for references.
http://docs.grails.org/3.1.1/ref/Plug-ins/URL%20mappings.html
http://mrhaki.blogspot.in/2013/11/grails-goodness-grouping-url-mappings.html
Related
As per Grails documentation
Grails also lets you write your domain model in Java or reuse an existing one that already has Hibernate mapping files. Simply place the mapping files into grails-app/conf/hibernate and either put the Java files in src/java or the classes in the project's lib directory if the domain model is packaged as a JAR. You still need the hibernate.cfg.xml though!
So This is exactley what i did.
I have used java domain model and hibernate.cfg.xml file for mapping. I also use
{DomainName}Constraints.groovy for adding Grails constraints. I also used to add functions to {DomainName}Constraints. For example, below is the content of my EmployeeConstraints.groovy
Employee.metaClass.static.findByDepartment = {depCode ->
createCriteria().list {
department{
inList ('code', depCode)
}
}
}
Now this works fine. But, when i add projection to it(code below), just to get the employee code.
Employee.metaClass.static.findByDepartment = {depCode ->
createCriteria().list {
projections { property('empCode', 'empCode') }
department { inList ('code', depCode) }
}
}
I get the below error..
" No signature of method: com.package.script142113.projections() is applicable for argument types.. "
Can someone point me to whats wrong with the code?
Thanks!
The property projection is used to return a subset of an object's properties. For example, to return just the foo and bar properties use:
projections {
property('foo')
property('bar')
}
You're getting an error because you've called the property method with 2 arguments instead of one.
By the way, I see another potential with your code. Grails will automatically create a dynamic finder findByDepartment that has the same name as the method your trying to add via the meta-class. I have no idea which one will take precendence, but I would suggest you avoid this potential problem and simplify your code, by adding this query using Grails' named query support, and call it something like getByDepartment so that the name doesn't class with a dynamic finder.
The answer by Dónal should be the correct one, but I found a strange behavior with grails 3.1. I got the same message using this call:
Announcement.createCriteria().list {
projections {
property('id')
property('title')
}
} .collect { [id: it['id'], title: it['title']] } // it['id'] not found
I fixed it by removing projections closure:
Announcement.createCriteria().list {
property('id')
property('title')
} .collect { [id: it['id'], title: it['title']] } // got the it['id']
Hope this help.
I messed around with this a bit yesterday and failed miserably. I want to convert:
"/$controller/$action?/$id?"
To
#in psudo
"/$controller/$id?/$action?"
#ideal regex
"\/(\w+)(\/\d+)?(\/\w+)?"
The most obvious way failed "/$controller/$action?/$id?"
I can write the regex's to do it, but I am having trouble finding a way to using true regexs (I found RegexUrlMapping but could not find out how to use it), and also can't find documentation on how to assign a group to a variable.
My question is 2 parts:
How to I define a URL Resource with a true regex.
How to I bind a "group" to a variable. In other words if I define a regex, how do I bind it to a variable like $controller, $id, $action
I would also like to be able to support the .json notation /user/id.json
Other things I have tried, which I thought would work:
"/$controller$id?$action?"{
constraints {
controller(matches:/\w+/)
id(matches:/\/\d+/)
action(matches:/\/\w+/)
}
}
also tried:
"/$controller/$id?/$action?"{
constraints {
controller(matches:/\w+/)
id(matches:/\d+/)
action(matches:/\w+/)
}
}
The grails way to deal with this is to set
grails.mime.file.extensions = true
in Config.groovy. This will cause Grails to strip off the file extension before applying the URL mappings, but make it available for use by withFormat
def someAction() {
withFormat {
json {
render ([message:"hello"] as JSON)
}
xml {
render(contentType:'text/xml') {
//...
}
}
}
For this you'd just need a URL mapping of "$controller/$id?/$action?"
I'm not aware of any way to use regular expressions in the way you want in the URL mappings, but you could get a forward mapping working using the fact that you can specify closures for parameter values that get evaluated at runtime with access to the other params:
"$controller/$a?/$b?" {
action = { params.b ?: params.a }
id = { params.b ? params.a : null }
}
which says "if b is set then use that as the action and a as the id, otherwise use a as the action and set id to null". But this wouldn't give you a nice reverse mapping, i.e. createLink(controller:'foo', action:'bar', id:1) wouldn't generate anything sensible, you'd have to use createLink(controller:'foo', params:[a:1, b:'bar'])
Edit
A third possibility you could try is to combine the
"/$controller/$id/$action"{
constraints {
controller(matches:/\w+/)
id(matches:/\d+/)
action(matches:/\w+/)
}
}
mapping with a complementary
"/$controller/$action?"{
constraints {
controller(matches:/\w+/)
action(matches:/(?!\d+$)\w+/)
}
}
using negative lookahead to ensure the two mappings are disjoint.
I am new to Grails and was trying to follow with the examples in "Beginning Groovy and Grails"
When I was trying out the examples, I had the following issue:
domainClass = grailsApplication.getArtefact("Domain", domainClassName)
The domainClass was returning NULL. But when I use the following snippet, I get the correct Class.
if (!domainClass) {
def artefacts = grailsApplication.getArtefacts("Domain")
domainClass = artefacts.find {item ->
item.name == domainClassName
}
}
What is wrong with the first part? Is there anything else that I need to take care of. I downloaded the example code of the book and I haven't seen any other specific changes.
Thanks in Advance!!
Use the full path of the domain class i.e prefix the package.
The first code snippet works too, the domainClassName just needs to be fully qualified name ie packagename.domainclassname
def domainClassName = 'org.abc.Sample'
def domainClazz = grailsApplication.getArtefact('Domain', domainClassName)
I am trying to override the g:link tag so that I can prefix an extra string. Here is my code:
import org.codehaus.groovy.grails.plugins.web.taglib.*
class ApplicationTagLib {
static namespace = "g"
def link = { attrs, body ->
if("es".equalsIgnoreCase(request.stLocale.language)) {
attrs['controller'] = "es/" + attrs['controller']
}
def applicationTagLib = grailsApplication.mainContext.getBean('org.codehaus.groovy.grails.plugins.web.taglib.ApplicationTagLib')
applicationTagLib.link.call(attrs, body)
}
}
This works fine except for when I add "es/" the resulting path gets translated into es%2F instead of es/ which causes the link to not work.
Is there a way to prevent this from automatically encoding the new slash or a better way to prefix this string to the controller path?
You should be aware that in Grails the controller package (thus it's location in the project's structure path) does not correlate with the default URL mapping - the structure is flattened.
The slash you add to the controller name is thus encoded as it would otherwise form a part of the URL (and thus not map to a controller).
Perhaps the logic for handling different locale be better placed in a controller anyway.
You can add this '/es' prefix in all links generated by grails tags by configuring your UrlMappings.groovy. If you're using the default one, generated by grails create-app command, you can add '/es' in your URL's like this:
class UrlMappings {
static mappings = {
"/es/$controller/$action?/$id?" { // <---------- added '/es' prefix
constraints {
// apply constraints here
}
}
"/"(view: "/index")
"500"(view: '/error')
}
}
To learn more about URL Mappings, see the Grails guide.
Regards
I have the following route registered;
routes.MapRoute(
"LocationsByArea",
"Locations/{system}/{storage}/{area}",
new { controller = "StorageLocation", action = "Index" },
null
);
...and the following code in my view;
<%= Html.ActionLink("Platser", "Index", "StorageLocation", new { system = Model.System, storage = Model.Storage, area = item.Name }, null)%>
My problem is when the "area = item.Name" contains a colon, e.g. "Area 4:1". If I click the rendered link I get HTTP-error 400, Bad reqest. I guess I have to encode my area parameter in some way, but I cant figure out how. Any help is apreciated.
Thanks!
The built-in encoding/decoding does not work, so I suggest you roll your own, like this:
namespace MyProject.Helpers
{
public static class JobNameHelper
{
public static string JobNameEncode(string jobname)
{
return jobname.Replace(":", "---colon---");
}
public static string JobNameDecode(string jobname)
{
return jobname.Replace("---colon---", ":");
}
}
}
Can you not just use
Server.UrlEnconde(item.Name)
Or am I missing something?
In your routing you may have to use Server.UrlDecde as well although I think It should decode for you on request.
Try using the Routing Debugger to see what the url router is getting passed, then you can see where the decoding needs to happen
ASP.NET 3.5 SP1 and earlier have a number of restrictions on which URLs are valid. In ASP.NET 4 most of these issues have been fixes (or are at least customizable via web.config). I think that the colon character, even when encoded, might not be allowed in ASP.NET 3.5 SP1 and earlier due to security concerns. Allowing colons can be a security problem when performing file checks since they are a little-known syntax for NTFS Alternate Data Streams.
I recommend trying to choose a character other than a colon for these purposes. Maybe a comma, semi-colon, or equal sign might work instead?