I have an application, that takes a path of a file from the database and renders it to html and displays. The controller, view and routes look like the following:
project/index.html.erb
<p><%= link_to project.title,{:controller => "markdowns" , :action => 'view', :github_link=>project.github_link},:target=>"_blank"%></p>
markdown_controller
class MarkdownsController < ApplicationController
def view
#markdown=MarkdownsHelper.markdown path
end
def path
File.open(Rails.public_path.to_s+params[:github_link].to_s, "rb").read
end
end
MarkdownsHelper.markdown method in the above controller renders the .md.
markdown/view
<%=raw #markdown %>
routes
resources :projects
match '/GitRepos/'=>'markdowns#view'
The problem:
The link that is being displayed after clicking on the title in the prokects/index is localhost:3000/GitRepos?github_link=%2FGitRepos%2Fbootstrap%2FREADME.md
But I want the link to be displayed as localhost:3000/GitRepos/bootstrap/Readme.md
where bootstrap is Project.title and Readme.md is the file that is being read. Also, my Project database has a github_link attribute which stores GitRepos/bootstrap/Readme.md
Model
The link will change according to the project.
The Project model has these attributes-> title and github_link.
So there are many projects and github_link stores the path addresses of Readme.md file of each project located in the local system.
My Approach
Here is the solution which I have, with my minimal knowledge in Ruby on Rails. Please let me know if can improve on this.
project/index.html.erb
<p><%= link_to project.title,{:controller => "markdowns" , :action => 'view',:title=>project.git_name,:id=>project.git_file},:target=>"_blank" %></p>
routes
match 'GitRepos/:title/:id' =>'markdowns#view'
Try
match '/GitRepos/:github_link'=>'markdowns#view'
Related
I'm new at rails and I'm currently working on an already existing application that handles butons like so:
<%= link_to 'Edit', edit_answer_path(ans) %>
That links to the file /answers/edit.html.erb but now I need to make a button that links to the file /answers/comment.html.erb how do I go about doing this?
I already tried with
<%= link_to 'Comment', comment_answer_path(ans) %>
but I get the error "Undefined method 'comment_answer_path'" even after adding this lines to answers_controller :
def comment
ans = Answer.find(params[:id])
end
You need to add a route to your config/routes.rb and then restart the server. Something like
resources :answers do
member do
get 'comment'
end
end
will create the comment_answer_path helper for you as well.
It depends on how you've set up the routes in routes.rb.
You can use rake routes to see the list of all paths and their alias.
I'm working through the "Ruby on rails 3 essential training" on lynda.com and am having an issue while generating my server. So far I have a subjects_controller.rb, linked to my views folder, to the file list.html.erb. My error when trying to start the server is:
No route matches {:action=>"show", :controller="subjects", :id=>1}
In my list.html.erb file I have written the code:
<td class="actions">
<%= link_to("Show", {:action => 'show', :id => subject.id}, :class => 'action show') %>
<%= link_to("Edit", '#', :class => 'action edit') %>
<%= link_to("Delete", '#', :class => 'action delete') %>
</td>
My subjects_controller.rb looks like:
class SubjectsController < ApplicationController
def list
#subjects = Subject.order("subjects.position ASC")
end
end
I have double checked to make sure I have everything written the same as the instructor but there seems to be a missing link. Any ideas? If I totally cut out the action:
<%= link_to("Show", {:action => 'show', :id => subject.id}, :class => 'action show') %>
Then the server starts up. There must be a problem here but I'm not sure what it is. Also when the instructor inputs link_to on his text editor, the txt turns a different color and mine does not. Same thing with his "#" instance variable. Mine doesn't change color. Not sure if this means anything either. Thanks for any input!
Here is my config/routes.rb file:
Rails.application.routes.draw do
root :to => "demo#index"
get 'demo/index'
get 'demo/hello'
get 'demo/other_hello'
get 'subjects/list'
end
Short version: The error message is telling you exactly what is wrong. You have no route that matches, because while your action is named list, your link specifies :action => 'show'.
Longer version: The second argument to the link_to helper is supposed to tell Rails what URL to generate for the link, usually by specifying one of your routes by name, but sometimes (as in this case), by specifying the action (and optionally the controller). You're specifying the action show. The subjects controller is implied. Therefore, Rails is trying to find a route (in the ones defined in your routes.rb) that GETs the SubjectsController#show action. However, as you can see from your routes.rb, you only define one route on the SubjectsController, and that's list.
If you're ever confused about what routes you have or what their names are, you can use the rake routes task to list them all out in a nice readable format.
Edit to respond to followup question:
The instructor is telling me that when you generate a controller and
action that its supposed to add a route to the routes.rb folder. This
worked for me earlier but when creating these actions that I'm having
trouble with now, it didn't generate anything in the routes.rb folder.
Do you know why that is?
When your instructor says 'generate', they probably mean 'use the rails generate command'. When you use the generator to create a controller and specify the actions in it, the it will also add those actions to the routes file.
If, on the other hand, you write the action into an existing controller (including using the generator for the controller but not specifying actions), or create the controller file yourself, you'll have to update the routes file manually. If you are using the generator and specifying actions and aren't getting updated routes, I'm not sure what's going on.
Personally, I prefer to write my routes by hand anyway - the generator often doesn't get them exactly right.
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 :)