I have a Customer_ratings model that allows users to leave feedback on each other. The web app is working properly, and feedback is collected, stored and displayed.
I wanted to go in and delete some feedback through the rails console, but when I enter Customer_rating.all, I get the following error:
LoadError: Unable to autoload constant Customer_rating, expected /Users/myapps/app/models/customer_rating.rb to define it
Similarly, if I enter Customer_rating[0], I get:
RuntimeError: Circular dependency detected while autoloading constant Customer_rating
I don't have this issue while accessing other tables through my console.
What could be causing the issue, and why wouldn't this error prohibit Customer_ratings from working properly through the web app?
It seems like a case of messed up naming convention.
As per Rails naming convention, file names should be in snake_case and class names in CamelCase. In your scenario, the file name should be customer_rating.rb and class name should be CustomerRating.
After making these changes, use CustomerRating.all(as the updated class name is CustomerRating) to fetch all the customer ratings. Do not use Customer_rating.all.
I'd also like to add a scenario of this problem that I found for future reference.
I'm running Rails 4.0 and I had this same problem but what happened was I had a model named Student inside student.rb that was contained in a folder called Student. I didn't realize it at first but the folder name was the problem. Changing the folder name to something other than a model name solved the problem.
If the naming convention is not off, like in this question, it may be an issue on initial first load if you're making a lot of requests at the same time. I experienced this with nested controllers Api::LocationsController.
I solved it by enabled eager_load in development env:
Rails.application.configure do
...
# Enabled this to avoid crash unable to autoload controller
# Error happens when you start and stop server on initial requests
# solution found via https://github.com/rails/rails/issues/32082#issuecomment-367715194
config.eager_load = true
I based this off of rails issues comments: https://github.com/rails/rails/issues/32082#issuecomment-367715194
You just need to modify the name of the Module
For example if the link is http://sairam.esy.es/users/customer_rating then
you controller should like be
module Users
class RatingController
# ...
def customer_rating
# ...
end
# ...
end
end
Related
I need to change short month in moment.
But I can't do it.
I have try to set
localeOutputPath: 'assets/moment-locales'
And call
Ember.$.getScript('/assets/moment-locales/ru.js');
In this case i have ember-mirage error
Your Ember app tried to GET '/assets/moment-locales/ru.js?_=1490191145335',
but there was no route defined to handle this request. Define a route that
matches this path in your mirage/config.js file
Is it simple way to set short months name for moment?
I assume you are using ember-moment addon; and already have configured config/environment.js with
moment: {
// This will output _all_ locale scripts to assets/moment-locales
localeOutputPath: 'assets/moment-locales'
},
as you have mentioned.
Ember.$.getScript('/assets/moment-locales/ru.js');
provides a way to dynamically load moment ru locale on the fly when needed. This means instead of including the related locale to your application's javascript file you prefer to load relevant locale upon some user request in your application. Generally it is best to perform such loading operation within a router's hook methods such as beforeModel or model.
In order to get short month names from moment; you need to first import ES6 moment module via
import moment from 'moment';
and access the short month names with
moment.monthsShort()
As far as I can see; there is a problem with the way you are requesting the locale so you are getting the error you have mentioned. I believe a working code is a better explanation from pure text; hence I have created the following git repository to illustrate how you can change the locale dynamically in a route and how you can display short names retrieved from moment. Please take a look at it by cloning and running in your localhost.
In the application at this repository, application.hbs contains links to 5 sub-routes; each displaying short names of months in different languages. The code that does the trick of dynamically loading the relevant locale is in routes/locale-route.js file's model hook method. If locale is already loaded (note that English is included by default with moment) it simply returns the short names of the months via switching to target locale (moment.locale(localeToLoad);). Otherwise, it performs a remote call to the server and waits for the response (by using a promise) to return the name of months. All routes for 5 different languages extend from this base route. Once, a locale is loaded from the server; you no longer need to load it again once more and the locale-route already handles it as I explained. I hope that helps.
After reading your comment; I updated the source code to include ember-cli-mirage. Mirage is a client-side mock server to develop, test and prototype your application. Once you include it as a dependency it starts intercepting your remote call requests. Hence, in your case mirage intercepts requests for demanding related locale. What you need to do is passing through mirage for locales. In order to do that, you need to add following
this.passthrough('/assets/moment-locales/**');
to mirage/config.js so that mirage will not interfere with demanding moment-locales at the runtime. Please see related file under the git repository I have provided. This will solve your problem for sure.
I'm working on a large web app that uses "type" as a column in the database for many of the tables. I understand that the word "type" is a keyword in Ruby, and should not be used as columns. However, why is it that I can still run the web app on my local server just fine, and that there aren't any apparent problems in the production environment? Will using "type" as a column potentially cause any trouble in the future?
This behavior is even more confusing because it does cause my RSpec feature tests to fail when creating a video (one of the resources) and then redirecting to the show view. (Note that the video as attributes that have associations with several of the tables which have "type" as a column).
This is the error message that is raised :
"The single-table inheritance mechanism failed to locate the subclass:
'reference'. This error is raised because the column
'type' is reserved for storing the class in case of
inheritance. Please rename this column if you didn't intend it to
be used for storing the inheritance class or overwrite
Tag.inheritance_column to use another column for that information."
(Pulled from the HTML generated and displayed by print page.body)
Why would this exception to raised in my test specs but not in the development or production environments? (I'm in charge of putting together test specs, so you have in your device on ways to get around this error, that would be helpful too!)
Notes on my configuration:
I'm using Ruby 2.1.2 and rails 4.1.1
Using capybara, factory girl, and capybara-WebKit as the web driver
As it turns out, there was an explicit type column in the schema but it was pulled from the subclass of the resource. The reason that RSpec had a problem is that I was trying to define the type column without making it a subclass. The solution was to use subclassed notation when inputting data into the type. In my case, this means the string in the type column needed to be put in as: "Tags::Reference" rather than "reference".
We have SomeMailer set up inside our engine. Upon generation of the mailer, Rails creates an SomeMailerPreview class, with the comment:
# Preview this email at http://localhost:3000/rails/mailers/some_mailer/test
However, once I run the Dummy app inside my engine, that URL doesn't resolve.
The engine is mounted on the root path '/':
mount MyEngine::Engine => "/"
I've tried different combinations of the url with the engine name in there, but doesn't resolve.
Is it possible to use the preview feature for a mailer inside an engine?
A little late on this but figured I would answer anyway. You can get your previews recognized by letting rails know where the previews path is. By default, it looks in
"#{Rails.root}/test/mailers"
and so your mailer previews have to be there for the url to resolve correctly. But you can change this by setting the path yourself in the development.rb file of Dummy
config.action_mailer.preview_path = "#{YourEngineRoot}/test/mailers"
And placing your previews in the path given. Your Url should resolve correctly after that.
I have the same issue. Luckily in my case, my engine is directly reliant on the main application. In the main application, I have my mailer previews even though the mailer is within my engine.
class ApplicantMailerPreview < ActionMailer::Preview
# Accessible from http://localhost:3000/rails/mailers/applicant_mailer/applicant_email
def applicant_email
recipient = MyEngine::ApplicantEmail.all.first
applicant = recipient.applicant
job = applicant.job
MyEngine::ApplicantMailer.applicant_email(job.id, applicant.id, recipient.id)
end
end
I just set up the environment for an existing Django project, on a new Mac. I know for certain there is nothing wrong with the code itself (just cloned the repo), but for some reason, Django can't seem to retrieve data from the database.
I know the correct tables and data is in the db.
I know the codebase is as it should be.
I can make queries using the Django shell.
Django doesn't throw any errors despite the data missing on the web page.
I realize that it's hard to debug this without further information, but I would really appreciate a finger pointing me to the right direction. I can't seem to find any useful logs.
EDIT:
I just realized the problem lies elsewhere. Unfortunately I can't delete this post with the bounty still open.
Without seeing any code, I can only suggest some general advice that might help you debug your problem. Please add a link to your repository if you can or some snippets of your database settings, the view which includes the database queries etc...
Debugging the view
The first thing I would recommend is using the python debugger inside the view which queries the database. If you've not used pdb before, it's a life saver which allows you to set breakpoints in your Python script and then interactively execute code inside the interpreter
>>> import pdb
>>> pdb.set_trace()
>>> # look at the results of your queries
If you are using the Django ORM, the QuerySet returned from the query should have all the data you expect.
If it doesn't then you need to look into your database configuration in settings.py.
If it does, then you must might not be returning that object to the template? Unlikely as you said the code was the same, but double check the objects you pass with your HttpResponse object.
Debugging the database settings
If you can query the database using the project settings inside settings.py from the django shell it sounds unlikley that there is a problem with this - but like everything double check.
You said that you've set up a new project on a mac. What is on a different operating system before? Maybe there is a problem with the paths now - to make your project platform independent remember to use the os.path.join() method when working with file paths.
And what about the username and password details....
Debugging the template
Maybe your template is referencing the wrong object variable name or object attribute.You mentioned that
Django doesn't throw any errors despite the data missing on the web
page.
This doesn't really tell us much - to quote the Django docs -
If you use a variable that doesn’t exist, the template system will
insert the value of the TEMPLATE_STRING_IF_INVALID setting, which is
set to '' (the empty string) by default.
So to check all the variables available to your template, you could use the debug template tag
{{ debug }}
Probably even better though is to use the django-debugging-toolbar - this will also let you examine the SQL queries your view is making.
Missing Modules
I would expect this to raise an exception if this were the problem, but have you checked that you have the psycopg module on your new machine?
I have a Rails 4.1.0 mountable engine. In the engine's application_helper.rb:
module MyEngine
module ApplicationHelper
def test123
"test123"
end
end
end
The method is in the dummy app's view general/index.html.erb view:
%<= test123 %>
This works. However, when I change the string returned by def test123 and refresh the browser, the new string is not displayed.
Of course, restarting the web server in the dummy app shows the new string.
So the question is, how to reload the engine's files without having to restart the web server?
PS. I am preferably looking for a way to do this using Rails itself, or a specific gem that solves this problem (but not the generic gems like Guard, Spork etc. although if all else fails, I will consider those too.)
PPS. There are similar questions on SO, but I have tried them all (even though they are for Rails 2.x, 3.x), and they have not worked for me.
You should explicitly require dependent helpers:
# engines/my_engine/app/controllers/my_engine/application_controller.rb
require_dependency "my_engine/application_helper" # This is a key point!
module MyEngine
class ApplicationController < ::ApplicationController
helper ApplicationHelper
...
you can use some thing like zeus which is helping a lot in watching project files for changes except in some cases when you change the configuration files it doesn't work and needs to be manually restarted.
but overall in most cases this works more than awesome