How to add action 'current_user' to a restful 'user'? - ruby-on-rails

I have a model 'User', it's a restful resource, and has the default methods like 'index, show, new, create' and others.
Now, I want to define a new action 'current_user', to show the information of current logged-in user, which is different from 'show'.
When I use:
link_to current_user.name, :controller=>'users', :action=>'current_user'
The generated url is http://localhost:3000/users/current_user, and error message is:
Couldn't find User with ID=current_user
Shall I have to modify the routes.rb? What should I do?
I have searched for some articles, and still have no idea.

Add
map.resources :users, :collection => {:current => :get}
Then, I use:
link_to 'current', current_users_path()
The generated url is:
http://localhost:3000/users/current
Now, everything is OK. Is this the best solution?

See my comment on the other answer for an explanation
map.current_user "users/current", :controller => :users, :action => :current
View:
link_to 'current', current_user_path

I would not add a new action for this. I would check the id passed to the show method.
class UsersController
def show
return show_current_user if params[:id] == "current"
# regular show code
end
private
def show_current_user
end
end
In the view use :current as the user id while generating path.
user_path(:current)

Related

Rails: link_to calls custom method in controller

I am looking to use link_to to call a method in my controller. However, for some odd reason the route looks for the show method.
In my view:
<% #beverages.each do |beverage| %>
..
<%= link_to 'Archive', beverages_archive_path(:id => beverage.id) %>
..
<% end %>
In my config/routes.rb
match 'beverages/archive' => 'beverages#archive'
In my beverages_controller.rb
def archive
beverage = Beverage.find(params[:id])
respond_to do |format|
# format.html # show.html.erb
format.json { render json: beverage }
end
# beverage.update_attribute('archive', true)
end
When I click on the archive link in the view, the URL does change to: http://localhost:3000/beverages/archive?id=11, however I get the following error.
The error I get:
ActiveRecord::RecordNotFound (Couldn't find Beverage with id=archive):
app/controllers/beverages_controller.rb:46:in `show'
Any idea on what I am doing wrong? Your help is much appreciated!
PS. I also looked at Rails 3 link_to delete destory method calls show method?
but nothing seemed to work.
Have you tried this in your routes?
match 'beverages/:id/archive' => 'beverages#archive', as: :beverages_archive
This will create the beverages_archive_path method for you. Also, as you are looking for a specific beverage, use :id inside the route so that it knows where to take the id parameter from.
Apart from that, you can always tell a link specifically which controller and action to link to by doing:
link_to "Label", :controller => :my_controller, :action => :index
Taken from here: Ruby on rails 3 link_to controller and action
Use the other notation (not match) instead.
resources :beverages do
collection do
get :archive
end
end
Try this one out and let me know if something went wrong.
There's not quite enough information here to know why beverages_archive_path works in your app -- one problem is that your routes file does not define a name for your beverages#archive route. What you want is something like:
match 'beverages/archive' => 'beverages#archive', :as => :beverages_archive
or better yet use resourceful routing conventions like so:
resources :beverages do
collection do
get :archive
end
end
What's happening is that you have a beverages#show route that matches /beverages/:id, and this is what /beverages/archive matches (with :id => 'archive').

How to call a non action method by clicking a button in Rails

Forgive me if this is a very newby question.
how can i call a method (sharing an object on facebook) when user clicked on the share button in the view.
I can do the share/facebook parts, i just don't know how to call a method from the model when the user clicks on a button
my_controller.rb
def do_something
...
end
routes.rb
get "/something" => "my_controller#do_something", :as => :do_something
#you can also use post, put, delete or match instead of get
view
<%= link_to "call do something", do_something_path %>
for post etc...
<%= link_to "call do something", do_something_path, method: :post %>
I see two potential answers depending on your specific needs.
If you want to add a method to your model outside of the columns you've created for your object you can do so in the model.rb file:
model.rb
def name_twice
"#{self.name}#{self.name}"
end
You can then take an instance of a model to call this: "#model.name_twice".
If you want to add another routed method in the controller, you can define it in your models_controller file:
models_controller.rb
def approve
#model = Model.find_by_id(params[:model_id])
model.toggle!(:approved)
redirect_to #model
end
In order for the new controller function to work, you must add it in the routes file:
routes.rb
resources :models do
get 'approve', :on => :member
end
Hope this might be a little helpful. These examples should give you an idea of how to add other methods/actions to a model/controller.

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

Question about URL friendly links

I am trying to get my urls to look like this:
example.com/posts/id_of_post/title_of_post
I have this in my controller:
match ':controller/:id/:link', :controller => 'posts', :action => 'show'
Say I have a list of posts.. how can I link to them?
<%= link_to 'Show', post %>
Just gives the usual /posts/id
On another note, at the minute I am making a url-friendly link when a post is created and storing it in the database. Would it be better to create on the fly? Is that possible/better?
I saw this in an answer to another question:
def to_param
normalized_name = title.gsub(' ', '-').gsub(/[^a-zA-Z0-9\_\-\.]/, '')
"#{self.id}-#{normalized_name}"
end
That would work if I could change the - to a /. Possible?
I recommend just doing this instead of the gsub stuff:
def to_param
"#{self.id}-#{title.parameterize}"
end
Downside is that if the title changes, the URL changes. Which is a downer.
So a lot of implementations will do
before_create :permanize
def permanize
permalink = title.parameterize
end
def to_param
"#{self.id}-#{permalink}"
end
This is what I did:
I added this to my post#create:
#post.link = (#post.title.parameterize)
I will give the user the option to edit the title for up to 5 mins after posting.
My route:
match "/posts/:id/:link" => "posts#show", :as => "story"
and my index view for posts
<%= link_to 'Show', story_url(post, post.link) %>

Rails route dependent on current user

I'd like to create a rails route for editing a user's profile.
Instead of having to use /users/:id/edit, I'd like to have a url like /edit_profile
Is it possible to create a dynamic route that turns /edit_profile into /users/{user's id}/edit, or should I do thing in a controller or?
You might want to create a separate controller for this task but you could also continue using users_controller and just check whether there is a params[:id] set:
def edit
if params[:id]
#user = User.find(params[:id])
else
#user = current_user
end
end
But you should note that /users normally routes to the index action and not show if you still have the map.resources :users route. But you could set up a differently called singular route for that:
map.resources :users
map.resource :profile, :controller => "users"
This way /users would list all the users, /users/:id would show any user and /profile would show the show the currently logged in users page. To edit you own profile you would call '/profile/edit'.
Since a route and controller serve two different purposes, you will need both.
For the controller, assuming you're storing the user id in a session, you could just have your edit method do something like:
def edit
#user = User.find(session[:user_id])
end
Then have a route that looks something like:
map.edit_profile "edit_profile", :controller => "users", :action => "edit"
This route would give you a named route called edit_profile_path
Tomas Markauskas's answer could work, but here's the answer to your question from the Rails Guide:
get 'edit_profile', to: 'users#edit'
So, when someone goes to www.yoursite.com/edit_profile, it will route to www.yoursite.com/users/edit.
Then, in your controller you can access the user with
#user = User.find(session[:current_user_id])
Assuming you set that session variable when someone logs in. Also, don't forget to check if they're logged in. This will work if your using Resourceful Routing (the Rails default) or not.
Source: http://guides.rubyonrails.org/routing.html
make the route as
get '/users/:id/edit', to: 'users#edit', as: 'edit_profile'
As explained in this link section 'The hard way' :
http://augustl.com/blog/2009/styling_rails_urls/
The url will be
/users/edit_profile
Because the ID is no longer in the URL, we have to change the code a bit.
class User < ActiveRecord::Base
before_create :create_slug
def to_param
slug
end
def create_slug
self.slug = self.title.parameterize
end
end
When a user is created, the URL friendly version of the title is stored in the database, in the slug column.
For better understanding read the link below
http://blog.teamtreehouse.com/creating-vanity-urls-in-rails
write it in any home controler.
def set_roots
if current_user
redirect_to dashboard_home_index_path
else
redirect_to home_index_path
end
end
in routes.rb file
root :to => 'home#set_roots'
match "/find_roots" => "home#set_roots"

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