I am a totally new to learn rails and just start this Ruby on Rails Guide website.
And, i am a little confused when I following some step.
1.Why "redirect_to #post" will get "show action"?
2.Why we need use "index action" to list all posts?
3.When we use "<%= link_to "My Blog", controller: "posts" %>", I know it will link to posts controller, but don't know why will display index action which list all posts?
Thanks.
"show" action is to display a object detailed information, and the object is #post.
"index" action is to display one sort of resources.
You can use the default action, but you can customize it at well, like below:
.<%= link_to "Blog", {:action => "any_action", :controller
"posts_or_any_controller"}, {:method => :get} %>
Related
In my rails project there is a controller and view named "Welcome/index" where index is an action and another one named "home/page" . As i set root"home#page" as my root page. Now i want to transfer from "page.html.erb" into "index.html.erb" . How can i do that. And the code i written is below.Do i have to enter some thing in my controller class. please suggest.
these are the links that i tried. (How to create an anchor and redirect to this specific anchor in Ruby on Rails)
<a rel="nofollow" href="index.html.erb">Transfer to index</a>
You are not supposed to link to .html.erb files, you should link to the methods (not exactly the name of the method, but the name of the route) of a controller.
I strongly encourage you to review the ruby on rails MVC principles. You can read about routing and linking aswell.
Responding to your question, check out the command "rake routes". It will list the defined routes of your app and helps you to use them.
Try to replace your code by this:
<%= link_to 'welcome', welcome_path %>
<%= link_to "Link", controller:"controllername" %>
is the code you should use
You need to make sure a named route is defined for welcome/index and then can use the Rails helper link_to to automatically build your link for you in the view.
In routes.rb:
match '/welcome' => 'welcome#index', :as => :welcome
In your page.html.erb view:
<%= link_to 'Go to Welcome Page', welcome_path %>
If you want go for index action of Welcome controller then you can use:
<%= link_to "Transfer to index", welcome_path %>
Check the rake routes for path.
Plese refer link
I am completely new to RoR. I have a parameter in one view of a controller now how can i get it in another view of the same controller?
You can set up a form or a link_to in form-a and make a HTTP (POST/GET) to form-b. Remember that you can put also any HTML (or JS) in your view that you like.
Have a look at:
link_to
link_to "Profile", :controller => "profiles", :action => "show", :id => #profile
# => Profile
If you want to link to a associated table you can easy do this with:
# #person.company.name is the name of the link
# company_path(#person.company) is the associated model
<%= link_to #person.company.name, company_path(#person.company) %>
I approve you to read the ruby on rails guides
Read the getting started chapter and then create the blog application you will see
that gives you a great entrace to ruby on rails.
Try to understand the Rails way.
I have a page app/views/new/news.html.erb and I simply want to link to this page from within my layouts/application.html.erb. Can someone please help! I have been struggling with this all morning.
I have tried things like <%= link_to "News", ... But I'm not really sure where to go from there.
You don't "link" to a view, you link to a controller which renders that view. Then, you'll need an entry in your routes.rb to wire up the url routing for that controller. If you have a controller named NewsController with a method called index and an entry in your routes.rb that looks like resources :news the following link_to should work: link_to "News", news_path.
In case it's not clear, the index method in your NewsController needs to have render :news in it.
Sounds like you may want to check out the guide on this topic: http://guides.rubyonrails.org/routing.html
If you have it setup correctly you should have a plural for your controller (i.e. news instead of new) and the following should work:
<%= link_to 'News', :controller => "news", :action => :news %>
This is assuming you are using scaffold.
If are adding this folder and page manually: for dynamic page, you have to create an action in your controller. For static page, you have to put it in your public folder.
You can always run
rake routes > routes.txt
in your application directory, which will dump a list of all routes into a txt file. Choose path that leads to action and controller you want, and then supply it as a param for link_to method :)
After playing around with links in Rails for a view hours i've managed to actually get a link to invoke a method in my controller. But i still don't understand why all my other attempts failed. Im hoping you could help me out with that.
I have the scaffold "Cars". When in the show view for a car, id like to click a link that invokes the method "drive" in my Car controller.
This WORKS: <%= link_to "Drive", drive_car_path(#car) %>
It seems this only works if i have this is my routes.rb:
resources :cars do
member do
get 'drive'
end
end
Why does <%= link_to "Drive", car_path, :method => :drive %> not work?
Do I need to put a GET in the routes.rb file for every method I create in my controller?
I can't seem to find any sites explain how to use links together with routes. They only seem to come separate. Do you guys have any easily understandable tutorials on this?
Try link_to "Drive", :controller => "car", :action => "drive"
Also, method is for choosing the HTTP method (GET, POST, ...). It's not method as in routine.
Be sure to check out Rails Routing from the Outside In and The Lowdown on Routes in Rails 3, they're both awesome resources.
I'm creating in my index page of my ruby on rails program, a list of the most commonly searched for terms in my database and hence each time a user selects a specific category this is written to another database.
What i would like it to create a hyperlink and pass a certain amount of parameters to a form like is usually done with a select_tag but instead with just a hyperlink, i would like to pass a set of hidden fields that i have on the page as well as what the user has selected.
To give you a better idea, basically i have the following structure in my program:
User inputs a search on (index.html.erb), user clicks on submit tag
action, user is taken to search.html.erb page and is displayed a set of refined categories + some fields, submit button,
user is taken to closest.html.erb (which uses parameters from the previous form by invoking the params[:searchSelected] and a few other params. )
I would also like to add this functionality:
Mimick this same operation, but instead of going in the search.html.erb, i would click on an already refined search category on the index.html.erb page (from a link_to , transmit as parameters which link_to the user has chosen + the hidden fields.
i Currently have this code
#stats.each do
|scr|%>
<%= link_to scr.category, :action => 'closest', :id => scr.category%>
I'm not sure if this is relevant, but i currently have the following routes in my routes.rb file
map.resources :stores, :collection => { :search => :get }
map.connect ':controller/:action/:id'
map.connect ':controller/:action/:id.:format'
would anyone please assist me please? this is my first ruby on rails project and i would really like to find a way around this please
I am not sure if this is what you were thinking, but you can add additional parameters to the link_to tag. They are then available in your controller. So:
<%= link_to scr.category, :action => 'closest', :id => scr.category, :other_param => "test" %>
Will be available in your controller.
def closest
params[:other_param] == "test" #this will be true
end
i managed to resolve this by taking the params[:id] and then according to the value either set my own values (instead of the hidden ones in the index.erb which i had set manually anyway) and otherwise, continue as usual had i placed a regular search
View:
<%= link_to obj.ptc_devicename ,"/wiuconfig/hd?idval=#{obj.id.to_s}&val=#{#devicetype}",:value => obj.ptc_devicename,:id =>obj.id %><br/>
Controller:
#Heading= params[:val]
#id=params[:id]
value will be id is 2 and val is #devicetype