I just generated some scaffold code using the command rails generate scaffold Review Title Review:text rating:boolean --skip-stylesheets. That goes fine, but when I type in rails server to start the server, and navigate to /reviews I get an error message saying
ArgumentError at /reviews
wrong number of arguments(1 for 0)
I have not written any code myself, I have only used the scaffolding generator. How do I fix this?
Your name Review Title has a space in it. Try ReviewTitle.
UPDATE
Try:
rails generate scaffold Review title:string review:text rating:boolean --skip-stylesheets
Related
I'm getting this error message when I run the above code generator: (I'm just a beginner)
invoke active_record
Another migration is already named create_posts.....
Use --force to remove the old migration file
What do I type into the terminal window to "use force"
You are getting the following error because you already have a migration named create_posts in your rails application.
invoke active_record Another migration is already named create_posts..... Use --force to remove the old migration file
So, what you need here is first remove the existing migration and then generate the scaffold.
rails d migration create_posts
rails generate scaffold post title:string body:text
Or
You could generate the scaffold using --force option
rails generate scaffold post title:string body:text --force
EDIT
As per your comment:
I did that and then a whole bunch of code appears with the lines of
code sating invoke...exist...identical.
It means that you already ran a scaffold once for Post successfully and you are trying to generate the scaffold again.
I am not sure why you are doing that BUT identical is not an error. Its just that Rails is telling you that you already have a particular file so I am not creating again.
You can reset your database if you don't care about losing your database with this :
b rake db:reset
This will re-reun all your migrations. But take note! Your migrations should be able to run from one end to the other. So if something is "not working" with the regular rake db:migrate, then you should resolve that issue is specifically.
Show me a more descriptive error, and I can tell you more.
You should add other migration in order to change your Post table as you want it to be.
Your could begin with rails g migration and see the help provided.
If you want to get away with it you can delete the migration that created the Post table (but I guess you would need to delete the DB)
After the first time you generate a scaffold, by default Rails will not overwrite the existing scaffold. This is to ensure that you don't accidentally destroy a lot of work.
If you're really sure you want to regenerate the scaffold and delete any changes you might have made to any of the generated files, try:
rails generate scaffold post title:string body:text --force
I am doing the following tutorial, to learn how to use dhtml in rails.
http://www.dhtmlx.com/blog/?p=426
I reach the point where I create the migration however when I do the rake db:migrate I recieve the following error:
An error has occurred, this and all later migrations canceled:
uninitialized constant CreateUsers::User
Don't seem to understand how I can possibly be recieving this error especially by simply following a tutorial. "/
Make sure you generate the User model before running the migration. (ruby script/generate model user in the tutorial, but rails g model User for Rails 3)
EDIT: As Jeremy pointed out, generating the model will create a migration file for you. The tutorial shows things in a somewhat backwards order.
On my blog I'm have posts that belong to a series. I've tried to scaffold series but there are some problems with routes.
The pluralization engine doesn't get it right so I had to manually change Sery, #series, and #sery which is not a big deal.
The routing seems to be ok with resources :series. But then when I try to create a series the form_for helper complains about the route.
And then when I create it with console it works but rails is still complaining about routes.
Please create a simple app and see what the problem is.
rails new test_series_app
And then run the scaffold generator:
rails g scaffold series name:string
And see how the routes are getting mixed up and help me out please!
For the record, I put the singularize code into the scaffold generator (yes, my one contribution to Rails). All it does is check if record_name == record_name.pluralize. If it does and you haven't passed in --force-plural, it calls record_name = record_name.singularize.
In this case "series".pluralize is the same as "series".singularize so I assume it won't do anything.
So if you're having problems w/ it, you need to write an inflector for the word.
(I wrote it after Jeremy Kemper's 2008 RailsConf keynote in which he accidentally passed in a plural model name causing himself all sorts of grief in the middle of his talk.)
NameError in GenresController#index
uninitialized constant GenresController
RAILS_ROOT: C:/Users/Will/Desktop/INSTAN~1/rails_apps/talewiki
I've created a table called Genres and when I try to connect to it via local host I get the above error.
Any ideas?
With all the questions you're asking I believe you're an absolute beginner regarding ROR. Perhaps you should visit some tutorials to learn rails.
I don't know what your genre model describes, but I think it will have a name.
Basic steps for a basic genre model:
Delete the table for your genres if created manually (with SQL code)
DROP TABLE genres;
generate a complete scaffolding for genres:
$ ruby script/generate genre name:string
$ rake db:migrate
Now you have a complete controller for all CRUD actions for a simple genre model
If I were you I would read some tutorial about RoR, because you make the impression that you don't understand RoR or the MVC principle behind it. A good start would be: http://storecrowd.com/blog/top-50-ruby-on-rails-tutorials/
You need to generate a controller to handle the index action when your browse your application on localhost
ruby script/generate controller genres index
run that from your console within your application and it will generate the GenresController with the action index (it will be an empty action but you shouldn't see an error when browsing http://localhost:3000/genres/)
file
C:/Users/Will/Desktop/INSTAN~1/rails_apps/talewiki/app/controllers/genres_controller.rb
must be present
i am new to RoR and following AWDwR book...
all was well till i started the Depot project....
created the products model using
ruby script/generate scaffold product title:string description:text image_url:string
now when i view the page http://localhost:3000/products it shows a generic page with nothing in the list and a link to add new product... when i click this link i get an error..the error is as follows...
undefined method `title' for #<Product:0x596c148>
then i checked the db..it seems there was no title column created at all... did a bit of searching for solutions and have got all the more confused...it appears to be a problem with scaffolding and version problems...
thanks in advance...
Perhaps you still need to run the migration? Try this:
rake db:migrate