Rails redirect_to post method? - ruby-on-rails

redirect_to :controller=>'groups',:action=>'invite'
but I got error because redirect_to send GET method I want to change this method to 'POST' there is no :method option in redirect_to what will I do ? Can I do this without redirect_to.
Edit:
I have this in groups/invite.html.erb
<%= link_to "Send invite", group_members_path(:group_member=>{:user_id=>friendship.friend.id, :group_id=>#group.id,:sender_id=>current_user.id,:status=>"requested"}), :method => :post %>
This link call create action in group_members controller,and after create action performed I want to show groups/invite.html.erb with group_id(I mean after click 'send invite' group_members will be created and then the current page will be shown) like this:
redirect_to :controller=>'groups',:action=>'invite',:group_id=>#group_member.group_id
After redirect_to request this with GET method, it calls show action in group and take invite as id and give this error
Couldn't find Group with ID=invite
My invite action in group
def invite
#friendships = current_user.friendships.find(:all,:conditions=>"status='accepted'")
#requested_friendships=current_user.requested_friendships.find(:all,:conditions=>"status='accepted'")
#group=Group.find(params[:group_id])
end
The solution is I have to redirect this with POST method but I couldn't find a way.
Ugly solution: I solved this problem which I don't prefer. I still wait if you have solution in fair way.
My solution is add route for invite to get rid of 'Couldn't find Group with ID=invite' error.
in routes.rb
map.connect "/invite",:controller=>'groups',:action=>'invite'
in create action
redirect_to "/invite?group_id=#{#group_member.group_id}"
I call this solution in may language 'amele yontemi' in english 'manual worker method' (I think).

The answer is that you cannot do a POST using a redirect_to.
This is because what redirect_to does is just send an HTTP 30x redirect header to the browser which in turn GETs the destination URL, and browsers do only GETs on redirects

It sounds like you are getting tripped up by how Rails routing works. This code:
redirect_to :controller=>'groups',:action=>'invite',:group_id=>#group_member.group_id
creates a URL that looks something like /groups/invite?group_id=1.
Without the mapping in your routes.rb, the Rails router maps this to the show action, not invite. The invite part of the URL is mapped to params[:id] and when it tries to find that record in the database, it fails and you get the message you found.
If you are using RESTful routes, you already have a map.resources line that looks like this:
map.resources :groups
You need to add a custom action for invite:
map.resources :groups, :member => { :invite => :get }
Then change your reference to params[:group_id] in the #invite method to use just params[:id].

I found a semi-workaround that I needed to make this happen in Rails 3. I made a route that would call the method in that controller that requires a post call. A line in "route.rb", such as:
match '/create', :to => "content#create"
It's probably ugly but desperate times call for desperate measures. Just thought I'd share.

The idea is to make a 'redirect' while under the hood you generate a form with method :post.
I was facing the same problem and extracted the solution into the gem repost, so it is doing all that work for you, so no need to create a separate view with the form, just use the provided by gem function redirect_post() on your controller.
class MyController < ActionController::Base
...
def some_action
redirect_post('url', params: {}, options: {})
end
...
end
Should be available on rubygems.

Related

Tyring to add followers to microposts, error: 'missing parameter microposts'

I have been trying to add followers to microposts with the following controller:
microposts_controller.rb :
def follow
#user = current_user
set_micropost
if #micropost.user_id != current_user.id
#micropost.followed += 1
#micropost.save
end
end
The thing is there is always a 'missing parameter' error 'microposts'. Meaning I am not passing a #micropost to the controller. The
<%= link_to 'Follow' uses micropost_new_path(micropost), method: 'follow' %>
So I don't know what I'm doing wrong. Defined the appropriate routes (the error states it is a microposts#create error, and I'm not sure why.
There's likely a few things that aren't quite right here, but the first one that stands out is that it looks like you've misunderstood what the method option for link_to is for. Here, "method" doesn't mean the name of the method your controller, it means the HTTP method to use for the request (such as POST, PUT, DELETE and and so on.) So it's likely this link is unintentionally calling the create action instead of the follow action.
For adding additional actions take a look at the section in the routing guide on Adding More RESTful Actions
As a brief example for creating a method to add followers:
If you have an micropost defined as a resource in your routes:
resources :microposts
and would like a new action (such as "follow") that applies to individual microposts you can update your resource to be:
resources :microposts do
post 'follow', on: :member
end
You can then add a follow method in your microposts_controller.rb, similar how you've done already. After editing your routes this will also provide a follow_micropost_path helper function that can be used to link to this action.

Custom Rest actions

I am trying to create a friendship and I created a custom action called accept. however i can't reach it. Everytime I call it i get the action show could not be found.
Here my route.rb file
resources :friendships do
collection do
delete 'cancel'
get 'accept'
end
end
Here how i call it
<%= link_to 'Accept', accept_friendships_path(:friend_id => f) %>
accept_friendships was taken from rake routes commands. And here how i define my accept controller
#Accept friendships
def accept
if #customer.requested_friends.include?(#friend)
Friendship.accept(#customer, #friend)
flash[:notice] = "Friendship Accepted"
else
flash[:notice] = "No Friendship request"
end
redirect_to root_url
end
Here the error
Unknown action
The action 'show' could not be found for FriendshipsController
Maybe I am wrong, but why you want "accept" to be a collection? I guess you want it to be a member, since you are passing friend_id. If you change it to member and make the path accept_friendship_path(#friendship) [ note singular form of friendship ], you might have better luck. Beside an addition argument your case does not differ from example on Ruby on Rails Guides, that is why it is worth to try it

Rails: Route to custom controller action

I have a really hard time understanding routes and I hope someone can help me.
Here's my custom controller
class SettingsController < ApplicationController
before_filter :authenticate_user!
def edit
#user = current_user
end
def update
#user = User.find(current_user.id)
if #user.update_attributes(params[:user])
# Sign in the user bypassing validation in case his password changed
sign_in #user, :bypass => true
redirect_to root_path
else
render "edit"
end
end
end
and I have the file settings/edit.html.erb and my link
<li><%= link_to('Settings', edit_settings_path) %></li>
The route
get "settings/edit"
doesn't work for this, because then I get
undefined local variable or method `edit_settings_path' for #<#<Class:0x00000001814ad8>:0x00000002b40a80>
What route do I have to give this? I can't figure it out. If I put "/settings/edit" instead of a path it messes up as soon as I'm on a other resource page because the resource name is put BEFORE settings/edit
Thx
Following should do:
get 'settings/edit' => 'settings#edit', :as => :edit_settings
# you can change put to post as you see fit
put 'settings/edit' => 'settings#update'
If you use /settings/edit directly in link, you shouldn't have problem with other resource name being prepended in path. However, without the leading slash, i.e. settings/edit it might have that issue.
Reason why edit_settings_path is not working might be because you didn't declare a named route. You have to use :as option to define by which method you will be generating this path/url.
If you want to explicitly define the route, you would use something like
get 'settings/edit' => 'settings#edit', :as => edit_settings
This statement defines that when a GET request is received for setting/edit, call the SettingsController#edit method, and that views can reference this link using 'edit_settings_path'.
Take some time to read the Rails guide on routing. It explains routing better than any other reference out there.
Also keep in mind the rake routes task, that lists the details of all the routes defined in your application.

where does the url routes get resolved when you call render in rails controller actions

Is there any method that i should look at in rails3.2 source code so as to know where the navigation or the url part of the render call get resolved?
The reason is, i have a small app in which url is of the form
www.example.com/bob/edit
the above route as it suggests renders the edit form.EDIT: i was able to get to this route by modifying response on the link_to helper.
def update
#when validation passes
redirect_to #user
#when validation fails
respond_to do |format|
format.html {render :action => "edit"}
end
end
Now the problem is when a validation error occurs on submission to update action of users_controller,
the url becomes
www.example.com/users/bob/edit
config/routes.rb
get "users/new", to: => "users#new"
resources :users
as you can see there's nothing interesting happening in routes,
in models/user.rb
def to_param
"#{name}"
end
in views/edit.html.erb
form_for(#user) do |f|
end
Observation: here when the form is rendered afresh, form 'action' points to "users/bob" but when the form is re-rendered 'cos of validation error, form action mysteriosly changes to "users/" which is weired and if i remove the to_param in user.rb model it works fine
Though its not such a big deal, i was thinking where, if i needed to override the url that is generated on render call, to change?????
Any suggestions and pointers to explore are wecome....
I'm not sure how you're getting the URLs you're getting, but a general answer to your question would be it doesn't. The URL you see after sending a request is the URL the request was sent to (or redirected to), not that of the page you came from, nor that of the template you render in the end. In your case, I'm guessing the problem is that you created a custom URL for the edit page, but not for update, and your form_for(#user) is sending the request to your update URL (probably PUT "/users/bob").
To fix this, the first thing is to create your custom update route. Maybe something like:
put ":id/update", to: => "users#update"
And then have your form_for use that URL:
form_for(#user, :url => "#{#user.to_param}/update")

How do you use a Rails 3 gem method to update a database model?

I am using the Thumb_Up gem for ruby on rails.
https://github.com/brady8/thumbs_up
I want users to be able to vote on posts.
However, I am unable to figure out how I can allow a user to click a button next to each post and add a vote to the database.
I can get this to happen in the rails console through doing the following:
u=User.first
m=Micropost.first
u.vote_for(m)
However, how can I get this to happen when a button is clicked in view. I am assuming I would have to use ajax, but how would I know the url I need to post to to make this action occur?
Any help would be greatly appreciated.
Update:
Thanks so much for the help! I am still having a problem with the code below.
Here is my routes.rb
resources :microposts do
post :vote, :on => :member
end
View:
<%= link_to('vote for this post!', vote_micropost_path(#micropost), :method => :post) %>
Controller:
def vote
#micropost = Micropost.find(params[:id])
current_user.vote_for #micropost
# This assumes you'll only call it via AJAX.
# If your ajax call doesn't return "ok", then you know something went wrong
render :text => 'ok', :layout => false
end
However, I'm still getting this error:
No route matches {:controller=>"microposts", :id=>#, :action=>"vote"}
Would anyone know why the routes aren't matching correctly?
I am assuming Rails 3. Rails 2's routes would look a little different.
First you would need to define a route in your config/routes.rb file. You could do this many ways. If you already have a route for microposts, you could simply add a "vote" action:
resources :microposts do
post :vote, :on => :member
end
(For clarity, the "post" above refers to the HTTP POST method and has nothing to do with your Micropost class.) If you use that route, you would then need to create a "vote" method in your Microposts controller to catch it. Something like
def vote
#post = Micropost.find(params[:id])
current_user.vote_for #post
# This assumes you'll only call it via AJAX.
# If your ajax call doesn't return "ok", then you know something went wrong
render :text => 'ok', :layout => false
end
Then in your view's AJAX POST call (assuming the example route I gave), you would get the url with:
vote_micropost_path(#micropost)
It would look like /microposts/56/vote

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