How would I send request data from a POST request to a GET request using Scala Play?(Using Play Framework 2.1.1)
My goal is to have a single page "Reports" that works like this: The report is a GET request, so if needed you could bookmark this report. The report consists of a table of models, and each model row has a delete button at the end. I want to click the delete button, have it post the id to my controller then reload the page with the reports filter parameters still on.
Currently I have the delete button just adding to the get, which works correctly but the remove=id parameter stays in the request/address bar. Therefore it tries to delete this model every time the page is reloaded. What I would like to do is have this form POST and then remove the model, then send all the request parameters other than remove to a GET request.
I would rather do this without javascript/AJAX.
You could reconstruct a URL through using queryString and path from the request object. Then redirect that back (without the delete parameter)
How to get query string parameters in java play framework?
Or if you have the call setup in the routes file to parse out, use the reverse route minus the delete parameter.
Play Framework - Redirect with params
http://www.mariussoutier.com/blog/2012/12/10/playframework-routes-part-1-basics/
def index() = Action { request =>
import play.api.Play.current
println(request.queryString)
val allWithoutDel = request.queryString - "del" //del is the query parameter
println(allWithoutDel)
val url = request.path + // fold or map the allWithoutDel down to a URL string again
redirect(url)
}
Related
I have a Pyramid app using URL disptach. I have a route '/delete' that removes a record from the database and redirects to a view. When the redirect happens, I want the view to reload on the same page. I'm using webhelpers.paginate for pagination. The problem is, when the redirection happens, the parameters are not passed.
The delete route:
#view_config(route_name='delete')
def delete(request):
# Get the current page, the page title, and the id of the record to delete
current_page = int(request.params.get('page', 1))
# Database transactions
...
# Reload the view
url = request.route_url(route_name='records', app_name='BLAH', userid='BLAH', page=current_page)
return HTTPFound(location=url)
The records view:
#view_config(route_name='records', renderer='records.jinja2')
def records(request):
# Get the current page
current_page = int(request.params.get('page', 1))
When the records view is loaded, the parameters are not passed and the default value of '1' is set for the current_page. The values of "BLAH" for the app_name and user_id aren't passed either.
One thing I did notice is that it seems like the view is loaded twice but I don't know how to confirm that. I think the page is loaded twice because I see two calls to the database after the redirect.
What am I missing? Thanks.
What's the url when your print url in delete route and what it the route records definition?
If your want a GET Request, you shoud try keyword argument _query
url = request.route_url(name='records', _query=(('page', current_page),))
I'm currently trying to connect an Extjs form to a Play! Scala backend.
I have no problem receiving the request, but
FormName.bindFromRequest.get returns to me None .
I'm able to find the data generated via submitting from Extjs in the POST request in request.request.body.data (the first request object is generated by SocialSecure's controller), whereas normally the data bound to the form would be found in request.request.body.data.elems
I think Extjs's eschewal of using <form> in their inserted HTML is what causes me this problem, but I'd still like to take advantage of Extjs's nice form verification UI.
Does Play! or Scala have any resources for modifying a request after the server has received it?
More info
This is the method my /requestAudit cuurently points to after a POST request:
def requestAudit = SecuredAction(WithProvider("google")) { // SecureSocial syntax
implicit request => { // let's call this line 0'
println(request.request.body.asFormUrlEncoded) // let's call this line 1'
println(request.body.asText) // let's call this line 2'
newAuditForm.bindFromRequest.fold(
errors => BadRequest(views.html.error(newAuditForm))
success => { /*insert the object into my db*/ }
) } }
Ext.js request
When I'm debugging in Eclipse with an Ext.js form, the Variables window shows: (click for closeup)
where the form values are located in request.body.data.key1, request.body.data.key2, etc
Bootstrap form request
On the other hand, the request for Bootstrap has the values stored in request.body.data.elems
#2manyprojects 's suggestion set me on the right path:
newAuditForm.bindFromRequest(
(request.request.body.asFormUrlEncoded).getOrElse(Map()))
.fold( ... )
worked.
I was still getting form binding errors after changing my code to this, and then I discovered a typo in the name property of one of my Ext.js form fields. The name of the field must be the same on both the UI and the Play Form.
I have a web application in Play. The web application consists of several pages. In every page there is a small flag that enables the user to change the language (locale) from german to english and back.
I handle this with a redirect to referer:
def referer(implicit request: Request[AnyContent]) =
request.headers.get(REFERER).getOrElse(mainUrl)
def locale(l: String) = Authenticated { user =>
implicit request =>
Redirect(referer).withCookies(Cookie(LANG, if (l == "de" || l == "en") l else "de"))
}
It is working fine. Well, at least for GET requests.
I have a specific page where the user has to input data in a form. This form is then POSTed to the server. Were errors found, the form is displayed again with the error messages, as usual. Now, if the user wants to change the language (by clicking on the flag), the redirect to referer does not work, because it tries to use a GET request, and Play complains that a GET route does not exist for this method (which is true).
I am solving this by caching the form and defining another method where the form is taken from the cache:
# User data is POSTed to the server
POST /create/insert controllers.MyCreate.insert()
# After a redirect the cached form is displayed again
GET /create/insert controllers.MyCreate.insertGet()
It works, but I don't like this solution. It does not seem normal to have to create another entry in the routes and another method just to adress this problem. I would need to add this hack for every POST route in my application!
Is there a more elegant solution to this?
You could change it into something like this (untested):
def changeLang(lang:String, returnUri:String) = Action {
Redirect(returnUri)
.withCookies(Cookie(LANG, if (lang == "de" || lang == "en") lang else "de"))
}
In you template you would output the route to changeLang in the link, you can get the uri via the request
#routes.Application.changeLang("en", request.uri).url
I suggest you make request implicit in your action and define it as implicit in your template so you don't need to pass it on to each template.
// in the controller
def myUrl = Action { implicit request =>
Ok(views.html.myTemplate("something"))
}
// in the template
#(title:String)(implicit request:play.api.mvc.RequestHeader)
Edit
As for the POST requests, it common (for these types of framework) to have POST requests simple handle stuff and then redirect to another page. The usual flow is like this:
Form submits to a handler
Handler does something with the form information
Handler redirects to a page
An example:
// Hooked up to a GET route
def edit(id:Long) = Action {
// render the view with a form that displays the element with given id
// if the flash scope contains validation information, use that in display
}
// Hooked up to a POST route
def editHandler = Action {
// validate the form
// if validation succeeds
// persist the object
// redirect to edit
// else
// put the form information into the flash scope
// put any validation messages into the flash scope
// redirect to edit
}
If you do not want to use this flow you need to have both a GET and POST route anyway. The user might do a page reload on the resulting page.
I have a class that models exactly the entity I have in the database. I have a stored procedure that takes in parameters for a new row and returns all the settings in the table which in turn populates my repository. I am able to see the results of GET, PUT and DELETE in the List of type Setting that is in memory. I am noticing first that even when I close Visual Studio and reopen and run the project, sometimes, the List is still in the state it was before. It is not repopulating from the database so I'm not sure why that is first of all... Secondly, I can't seem to get POST to work from Fiddler unlike the other HTTP verbs. I DO see the values from Fiddler show up in the code below but I get the error: Invalid URI: The format of the URI could not be determined. I get the same error if I pass an ID or not.
Here is what I put into Fiddler:
POST localhost:54852/api/settings
Request Headers
User-Agent: Fiddler
Content-type: application/x-www-form-urlencoded
Host: localhost:54852
Content-Length: 149
Request Body
ID=0&Category=Dried%20Goods&Sub_Category=Other&UnitSize=99&UnitOfMeasureID=999&Facings=true&Quantity=true&EverydayPrice=999.99&PromotionPrice=111.11
PostSetting function within my SettingsController
public HttpResponseMessage PostSetting(Setting item)
{
item = repository.Add(item);
var response = new HttpResponseMessage<Setting>(item) { StatusCode = HttpStatusCode.Created };
string uri = Url.Route("DefaultApi", new { id = item.ID });
response.Headers.Location = new Uri(uri);
return response;
}
Should I create a new procedure that gets the MAXID from the database and use that as the NEW ID in the line above where a new ID is created?
You need to create a JSON representation of the Setting class or item that you are wanting to test with use Fiddler (now a Telerik product) and use the Composer tab.
Next you will want to perform a POST to the following URL:
http://[your base url]/api/settings
and pass the JSON formatted setting class.
You can see an example of this here: ASP.NET Web API - Scott Hanselman
Here is a short video showing how to achieve it easily
get and post to webapi from fiddler
Action create shows form:
def create = Action {
Ok(html.post.create(postForm))
}
How can i modify this action so that for GET request it would give out form and for the POST request it would process user input data, as if it were a separate action:
def newPost = Action { implicit request =>
postForm.bindFromRequest.fold(
errors => BadRequest(views.html.index(Posts.all(), errors)),
label => {
Posts.create(label)
Redirect(routes.Application.posts)
}
)
}
Wthat i mean is i want to combine this two actions.
UPDATE1: I want a single Action that serves GET and POST requests
It is recommended not to merge both actions, but modify routes to get the behavior you are expecting. For instance:
GET /create controllers.Posts.create
POST /create controllers.Posts.newPost
In case you have several kind of resources (post and comments, for instance), just add
a prefix to the path to disambiguate:
GET /post/create controllers.Posts.create
POST /post/create controllers.Posts.newPost
GET /comment/create controllers.Comments.create
POST /comment/create controllers.Comments.newComment
I tried once to accomplish similar thing, but I realized that I wasn't using framework like it was meant to be used. Use separate GET and POST methods like #paradigmatic showed and in cases like you specified "If we take adding comments to another action, we wouldn't be able to get infomation on post and comments in case an error occured (avoding copy-paste code)." - just render the page at the end of controller method with the view you like? and for errors etc. you can always use flash scope too? http://www.playframework.org/documentation/2.0.2/ScalaSessionFlash you could also render this form page with two or more beans and send them to controller side to catch related error messages and data.?