I have a Rails 5 application that will have dynamic content in the header based on the current route. I realize that I can get the route and compare it with something like if(current_page?('/home')) but is this really the best way?
Think of initializing your dynamic content in controller's actions. It is the common solution for such things.
For example:
html:
<title><%= #title %></title>
controller:
def index
...
#title = 'Hello world'
...
end
Also, you can initialize dynamic content in Rails views using content_for helper method. There is a similar question about this Rails: How to change the title of a page?
If you are sure that you have to set this content in a different place and based on the current route, I advise you to use params[:controller] and params[:action] parameters, although your solution is not bad too.
I think using params[:controller], params[:action] or current_page? would be better
You can use named routes with current_page?:
if(current_page?(posts_path))
and
if(current_page?(post_path(1))
In addition, you can also check the the current path by using request
if you're in root path
request.url
#=> "http://localhost:3000"
request.path
#=> "/"
Related
Apologies for such a simple question, but I couldn't been able to solve it myself after hours since my RoR knowledge is basically nonexistent. In the Rails application I'm working with, has been used a navigation helper to highlight active menu:
def nav_link(link_text, link_path, ico_path)
class_name = current_page?(link_path) ? 'active' : nil
content_tag :li do
link_to(link_path, class: class_name) do
image_tag("icons/#{ico_path}.svg") + content_tag(:span, link_text)
end
end
end
The circumstances have changed and current_page? is no longer a viable option, since routing now handled on the front-end. Is there a way to achieve the same functionality by retrieving, for instance, current url and check it against link_path?. I've tried a lot of things with different helpers like request.original_url, but to no avail.
request.original_url should work according to the documentation.
Returns the original request URL as a string
http://apidock.com/rails/ActionDispatch/Request/original_url
You could also try string concatenation with different variables.
request.host + request.full_path
If that doesn't work either, you could try
url_for(:only_path => false);
Use
request.url
http://api.rubyonrails.org/classes/ActionDispatch/Http/URL.html#method-i-url
or
request.path
http://www.rubydoc.info/gems/rack/Rack/Request#path-instance_method
You'll want to look at the active_link_to gem:
def nav_link(link_text, link_path, ico_path)
content_tag :li do
active_link_to link_path do
image_tag("icons/#{ico_path}.svg") + content_tag(:span, link_text)
end
end
end
Unlike the current_page? helper, active_link_to uses controller actions and model objects to determine whether you're on a specific page.
current_page? only tests against the current path, leaving you exposed if you're dealing with obscure or ajaxified routes.
--
I was going to write about how current_page? works etc, but since you mentioned that it's nonviable, I won't. I would have to question why it's nonviable though...
routing now handled on the front-end.
Surely even if you're using something like Angular with Rails, you'd have to set the routes for your app?
How do you make a specific view show a different helper.
module ApplicationHelper
def about_title
%Q{Everything you need!}.html_safe
end
def contact_title
%Q{Contact us!}.html_safe
end
end
I have a partial header that renders in every view but I want to show a different header title without having to edit the views directly (or edit a variable? in the view to show what I want?)
<h1 class="title"><%= about_title %></h1>
What I'm thinking is making an if/else in the helper but I am new to rubyonrails and I'm not sure how is this done.
You need to set the title somewhere. There's a few ways you can handle this. You could use the controller + action name, and set up the titles in i18n.
en:
titles:
home_index: "Welcome!"
session_new: "Login"
Then in your layout:
<title><%= t("titles.#{controller.controller_name}_#{controller.action_name}") %></title>
Another way to do it is using content_for & yield but that means putting code in your views :)
This might be a slightly odd question, but I was wondering if anyone know a Rails shortcut/system variable or something which would allow me to keep track of which controller is serving a page and which model is called by that controller. Obviously I am building the app so I know, but I wanted to make a more general plugin that would able to get this data retroactively without manually going through it.
Is there any simple shortcut for this?
The controller and action are defined in params as params[:controller] and params[:action] but there is no placeholder for "the model" as a controller method may create many instances of models.
You may want to create some kind of helper method to assist if you want:
def request_controller
params[:controller]
end
def request_action
params[:action]
end
def request_model
#request_model
end
def request_model=(value)
#request_model = value
end
You would have to explicitly set the model when you load it when servicing a request:
#user = User.find(params[:id])
self.request_model = #user
There are a number of ways that I know of:
First you can do rake routes and check out the list of routes.
Second you could put <%= "#{controller_name}/#{action_name}" %> in your application.html.erb and look at the view to see what it says. if you put it at the extreme bottom you'll always get that information at the bottom of the page.
The controller can be accessed through the params hash: params[:controller]. There isn't really a way to get the model used by a controller though, because there is no necessary correlation between any controller and any model. If you have an instance of the model, you could check object.class to get the model's class name.
Let's say, I connected the route / to WelcomeController's index action.
Inside of the index.html.erb-Template I want to display the path of the template from Rails.root upwards, ie.
<h1> We are rendering: <%= how_do_i_do_this? %></h1>
to render to
<h1> We are rendering: app/views/presentation/index.html.erb</h1>
In Rails 2 I could access template.path, but this doesn't work anymore
Any ideas?
Because of how template rendering works in Rails, you will now be able to use __FILE__ for this instead. This works for me:
<%= __FILE__.gsub(Rails.root.to_s, "") %>
There may be a better way to do this however, but I couldn't find it when I went looking.
Ryan's answer works. If you also want to put your method in a helper, use Kernel#caller. Here is a method I'm using to do something similar:
def has_page_comment? code = nil
if code.nil?
# grab caller file, sanitize
code = caller.first.split(':').first.gsub(Rails.root.to_s,'').gsub('.html.erb','')
end
...
end
I used rake routes to print out all of the routes in my application.
What I found is that a couple of routes map to the same controller/action combination.
So in my action I would like to display which route was actually used to track down where everthing is coming from.
I tried just rendering params.inspect as text:
render :text => params.inspect
But I don't get the route information in the hash.
Is there some other command to reveal the currently used route from within the action?
I think you can use
request.url or params[:action] or params[:controller] depending on what you need.
request.url
This will tell you the route that caused your current action to be invoked.