In my Rails 3 production.log I see some errors like:
AbstractController::ActionNotFound (The action 'images' could not be found for ClientsController)
I don't notice anything going wrong. I searched for any call to 'images' and 'AbstractController' in my project but no clue.
What does this error mean and what does the AbstractController do?
Txs in advance
The error means you are missing a method images in your ClientsController? Or at least: tried to access that.
The AbstractController is a class inside Rails which serves as a base for every controller. Your ApplicationController derives from it.
Related
I'm a beginner to both ruby and rails, and using Rails 5.17 to develop a web app for a class.
Creating the empty Rails project was successful, but something is going wrong when creating a new controller. I generated a new controller named cars from the root of the project, which was successful. There was a file in app/controllers named cars_controller.rb which looks like this:
class CarsController < ApplicationController
end
I added a method to this file named hello that does nothing.
I then created a file named cars.html.erb in the app/views/layouts directory. This file is a basic page of html code.
In config/routes.rb, I added the following:
get '/cars', to:: 'cars_controller#hello'
resources: cars
After all of this, I ran rails server, and opened localhost:3000 in a browser. This brings up the normal Ruby on Rails welcome page.
But when I go to localhost:3000/cars, I get the following:
Routing Error
uninitialized constant CarsControllerController
I've tried changing the name of the cars_controller.rb file. I've tried changing the name of the class in the controller file from CarsController to Cars. I've tried many different routes in routes.rb. I finally tried uninstalling Rails 5.17 and installing Rails 5.13.
I'm very confused, and I'd be grateful for any advice I can get. Thanks in advance!
One of the great things about Rails is its preference for convention over configuration. However, for this to really benefit you, you need to stick to doing things “The Rails Way” rather than your own way, wherever possible.
In this case, start by getting rid of your custom get route, and just use resources :cars.
From the command line, run rake routes (you might be able to run rails routes on your rails version too) and see the routes that it has created for you.
Now, rename the method you added to your CarsController from hello to index.
Move your hello.html.erb file from app/views/layout to app/views/cars/index.html.erb.
Finally, start the rails server (rails start) and load the url http://localhost:3000/cars in your browser.
—-
Note that templates in app/views/layout have a special purpose. These are used to apply a general template to your views. Look up the use of layout within a controller for more details
I think you have an error in how you had defined your route - you don't need _controller.
Instead, try this:
get '/cars', to: 'cars#hello'
Also, keep in mind that in your cars directory you need the view: hello.html.erb
I have a model, controller and routes configured sucessfully with the name animegif.
In my show method, it looks under application/show instead of views/animegif/show.
Missing template animegif/show, application/show
"searched in /Users/myName/Desktop/testapp/app/views
My easy fix was adding this method to my animegif controller but I do not understand why is it not searching under views/animegif/show by default.
When I followed the rails tutorial by Michael Hartl, the paths were located correctly. Is there something I am doing wrongly?
Name of controller: animegifs_controller, model: animegif
For my routes I am using resources to generate the default routes for the model
def self.controller_path
"animegif"
end
If you read the error message once again you can see it first animegif/show directory of your views. If rails does not find the required template in that directory then it falls back to app/views. You are only getting this error message because either the show.html.erb is not there or you have any typo error.
If you are more curious about how rails finds your views, please refer to this post by Andy Wang. He has explained it in a better way.
Regarding the error message it is looking in app/views/animegif/ and app/views/application/ but cannot find the template. So you probably have a typo in the template's name show.html.erb (or other formats than html) in the respective directory.
I have been developing in Ruby on Rails for a while now so I am completely confused at why this is happening. I created a controller called ApiController as you can see below.
class ApiController < ActionController::Metal
def documentation
end
def request_manager
end
end
Here are the routes I set to setup the documentation view.
Rails.application.routes.draw do
root 'landing#home'
get 'api' => 'api#documentation'
end
There is an documentation.html.erb file in the api folder as well, but
No matter what I do I get the following error.
It makes no sense to me why it's not routing correctly and has me completely baffled.
As a side note, the landing controller works perfectly fine and routes to the home page with no problem so it's just this controller.
Actually I just figured it out. Turns out that ActionController::Metal turns off must functionality including rendering so when you attempt to make it render as a normal controller, it faults while loading and the error is somewhere in the class files of Ruby's main code. Hence me not being able to find what was going wrong exactly till I looked up more documentation for the Metal controller.
I was using ActionController::Metal for it's speed and just didn't realize how much it stripped away from functionality in the process.
Directory:
Prototype
-app
-assets
-controllers
---welcome_controller.rb
domainobjects
---SimilarJob.rb
Utilities
--API.rb
Controller Code
require_relative '../domainobjects/SimilarJob'
class WelcomeController < ApplicationController
def index
foo = API.new('DEVKEY')
res = foo.RetrieveFacts("Test", "Me")
#newResult = SimilarJob.new("test") <-- Failing Line!!!
render :text => res["Response"]["IsInternationalResponse"]
end
end
Object Code
class SimilarJob
end
I stripped out some things, but the API class exists in a separate directory, "Utilities", and for some reason I don't even have to reference it using the "requires_relative" keyword. It's a wrapper class that includes HTTParty and makes a successful GET request to my external API every time. Can someone explain why I seemingly don't have to reference it anywhere?
Alternatively, attempting to initialize the SimilarJob class fails each time. The error is:
uninitialized constant WelcomeController::SimilarJob
From what I researched here and on the web, this means I'm not referencing the file correctly. To test this out, I tried naming it incorrectly in the "requires_relative" statement and the framework informs me that the requested file could not be loaded. So it seems like Rails is finding my class, it just won't initialize it for some reason.
The most maddening part is that I'll make a few small changes to SimilarJob, restart my server, and it'll work all of a sudden. If I stop and start the server again, it's back to the error I pasted below.
This is my first time really digging in something other than .NET MVC or KnockoutJS..would you guys mind pointing out the error of my ways?
EDIT: I used the generate command for this controller, so all views and routes work appropriately. In fact, if I comment out the problematic line, the property I'm referencing on the last line in my JSON response renders to the file just fine.
EDIT v2: Strangely enough..changing my class name to Jobs (one word) is getting rid of this error. This comes off as bizarre! Can anyone confirm that this is my issue?
Names matter, and you've named your file wrong. SimilarJob.rb needs to be similar_job.rb.
Similarly, your API file should be called api.rb, and the class it defines should be called Api. This stuff is important, as you've deviated badly from Rails convention, and are suffering for it.
Greeting all...
I'm trying to figure out a problem that I've never seen and shouldn't be happening by all accounts...
I'm using Rails 3.0.12 with a simple/standard ActionMailer setup:
I have HelpRequestMailer in app/mailers
I have HelpRequestsController in app/controllers
First problem... When I call the mailer in my controller...
help_request = HelpRequest.new(params[:help_request])
...
HelpRequestMailer.help_request_email(help_request).deliver
I get the following error: NameError (uninitialized constant HelpRequestsController::HelpRequestMailer)
This in itself is strange.
When I add the following...
require File.expand_path('../../mailers/help_request_mailer', FILE)
...To the top of the controller (I would expect the path to be '../mailers/help_request_mailer' but that doesn't work) - which I shouldn't have to do - the controller seems to find the mailer but doesn't seem to recognize what it is/know what to do with it. I get the following error:
NoMethodError (undefined method `help_request_email' for HelpRequestMailer:Class)
Which is technically true... There's no help_request_email class method in HelpRequestMailer... It's an instance method (as specified by the documentation).
My ActionMailer configuration lives in config/application.rb
Any help/suggestions would be greatly appreciated...
I had this problem too, and it turned out to be a case of a completely unhelpful error message. In my case it was just a syntax error in some of my code for the action mailer or the associated view.
I think what happened is that when Rails couldn't properly parse the mailer or view code, it just bypassed the files and never instantiated the action mailer object, leading to the error in the controller.
I would have much preferred it if Rails had tripped on the error in the action mailer code itself.