Hi I want to delete all stuff related to rails generate scaffold at once.
You can use this command and enjoying......
rails destroy scaffold scaffoldname
scaffold name = The name of generated scaffold which you generate..
rails d scaffold yourscaffoldname
(In your terminal)
Related
I create new Rails application with --api parameter, like on manual http://edgeguides.rubyonrails.org/api_app.html
rails new app2 --api
For scaffold I use
bin/rails generate scaffold People first_name:string last_name:string age:integer
And Rails generate controller with not only actions for json result, and don't need "new" and "edit" actions, and html rendering
Also it generates
create app/views/people
create app/views/people/index.html.erb
create app/views/people/edit.html.erb
create app/views/people/show.html.erb
create app/views/people/new.html.erb
create app/views/people/_form.html.erb
that I don't need, because I need only API
Why?
I want to receive result, like I use rails-api gem
Version of Rails is 4.2.5
If you just want to generate model and controller, you can use:
bin/rails generate resource People first_name:string last_name:string age:integer
I found answer. "--api" command is only for 5.0 Rails
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 already have the database tables and I need to create the rails script
rails generate scaffold ...
Is there a way or a tool ?
Thanks.
EDIT: usually I do
rails generate scaffold myObj1 columna:id, columnB:string
rails generate scaffold myOdb2 columna:id, columnB:string
and it create everything including dbg script.
I want to create the script from the db now. because I already have the db tables.
Just run the scaffold, and delete the migration file it creates, since you already have the table in the database.
I'm new to Rails so my current project is in a weird state.
One of the first things I generated was a "Movie" model. I then started defining it in more detail, added a few methods, etc.
I now realize I should have generated it with rails generate scaffold to hook up things like the routing, views, controller, etc.
I tried to generate the scaffolding but I got an error saying a migration file with the same name already exists.
What's the best way for me to create scaffolding for my "Movie" now? (using rails 3)
TL;DR: rails g scaffold_controller <name>
Even though you already have a model, you can still generate the necessary controller and migration files by using the rails generate option. If you run rails generate -h you can see all of the options available to you.
Rails:
controller
generator
helper
integration_test
mailer
migration
model
observer
performance_test
plugin
resource
scaffold
scaffold_controller
session_migration
stylesheets
If you'd like to generate a controller scaffold for your model, see scaffold_controller. Just for clarity, here's the description on that:
Stubs out a scaffolded controller and its views. Pass the model name,
either CamelCased or under_scored, and a list of views as arguments.
The controller name is retrieved as a pluralized version of the model
name.
To create a controller within a module, specify the model name as a
path like 'parent_module/controller_name'.
This generates a controller class in app/controllers and invokes helper,
template engine and test framework generators.
To create your resource, you'd use the resource generator, and to create a migration, you can also see the migration generator (see, there's a pattern to all of this madness). These provide options to create the missing files to build a resource. Alternatively you can just run rails generate scaffold with the --skip option to skip any files which exist :)
I recommend spending some time looking at the options inside of the generators. They're something I don't feel are documented extremely well in books and such, but they're very handy.
Great answer by Lee Jarvis, this is just the command e.g; we already have an existing model called User:
rails g scaffold_controller User
For the ones starting a rails app with existing database there is a cool gem called schema_to_scaffold to generate a scaffold script.
it outputs:
rails g scaffold users fname:string lname:string bdate:date email:string encrypted_password:string
from your schema.rb our your renamed schema.rb. Check it
In Rails 5, you can still run
$rails generate scaffold movie --skip
to create all the missing scaffold files or
rails generate scaffold_controller Movie
to create the controller and view only.
For a better explanation check out rails scaffold
This command should do the trick:
$ rails g scaffold movie --skip
You can make use of scaffold_controller and remember to pass the attributes of the model, or scaffold will be generated without the attributes.
rails g scaffold_controller User name email
# or
rails g scaffold_controller User name:string email:string
This command will generate following files:
create app/controllers/users_controller.rb
invoke haml
create app/views/users
create app/views/users/index.html.haml
create app/views/users/edit.html.haml
create app/views/users/show.html.haml
create app/views/users/new.html.haml
create app/views/users/_form.html.haml
invoke test_unit
create test/controllers/users_controller_test.rb
invoke helper
create app/helpers/users_helper.rb
invoke test_unit
invoke jbuilder
create app/views/users/index.json.jbuilder
create app/views/users/show.json.jbuilder
I had this challenge when working on a Rails 6 API application in Ubuntu 20.04.
I had already existing models, and I needed to generate corresponding controllers for the models and also add their allowed attributes in the controller params.
Here's how I did it:
I used the rails generate scaffold_controller to get it done.
I simply ran the following commands:
rails generate scaffold_controller School name:string logo:json motto:text address:text
rails generate scaffold_controller Program name:string logo:json school:references
This generated the corresponding controllers for the models and also added their allowed attributes in the controller params, including the foreign key attributes.
create app/controllers/schools_controller.rb
invoke test_unit
create test/controllers/schools_controller_test.rb
create app/controllers/programs_controller.rb
invoke test_unit
create test/controllers/programs_controller_test.rb
That's all.
I hope this helps
One of the things that bothers me in Rails is that scaffolding generates migrations that I don't always need.
Is there a way to generate the scaffold without the corresponding migration?
Use the --skip-migration parameter. For example:
rails generate scaffold post title:string body:text --skip-migration