Is there any way to ‘undo’ the effects of a scaffold command in Rails?
First, if you have already run the migrations generated by the
scaffold command, you have to perform a rollback first.
You can create scaffolding using:
rails generate scaffold MyFoo
(or similar), and you can destroy/undo it using
rails destroy scaffold MyFoo
That will delete all the files created by
generate, but not any additional changes you may have made manually.
Rishav Rastogi is right, and with rails 3.0 or higher its:
rails generate scaffold ...
rails destroy scaffold ...
You can undo whatever you did with
rails generate xxx
rails destroy xxx
For example this applies generators to migration, scaffold, model…etc
If you just want to see the files a generator will create you can pass the generator –pretend or -p option.
Best way is :
destroy rake db: rake db:rollback
rails destroy scaffold Name_of_script
for first time, you can check you database migration if you have generate scaffold.
you must destroy them to clean up your database
rails d scaffold
rails d scaffold <scaffoldname>
Also, make sure you undo the migration you made either by rollback or to a particular version.
To generate scaffolding :
rails generate scaffold xyz
To revert scaffolding :
rails destroy scaffold xyz
Rails destroy name
For generating scaffold in rails –
rails generate scaffold MODEL_GOES_HERE
For undo scaffold in rails –
rails destroy scaffold MODEL_GOES_HERE
you need to roll back migrations too after destroying scaffold too
rails destroy scaffold 'scaffoldname' rake db:rollback
So, Process you should follow to undo scaffolding in rails 4. Run Command as below:
rails d scaffold FooBar
rake db:rollbackif you_had_run_
rake db:migrateafter creating above scaffold?
rails d scaffold MODEL_NAME rake db:rollback
Recommend rollback First ,type in your Terminal.
Add destroy scaffold (the ‘d’ stands for ‘destroy’)
rails d scaffold name_of_scaffold
Enjoy your code.
First you will have to do the rake db:rollback for destroy the table
if you have already run rake db:migrate and then you can run
rails d scaffold Model
you need to rollback the migrations first by doing rake db:rollback if any
And then destroy the scaffold by
rails d scaffold foo
scaffold itself and all the things that amalgamate it.
destroy command is the opposite of
generate and will undo one. Just pass it the name the same way did with
generate and it’ll be scrubbed from your project:
rails generate scaffold posts title:string content:text rails destroy scaffold posts title:string content:text
To generate the scaffold:
rails generate scaffold abc
To revert this scaffold:
rails destroy scaffold abc
If you have run the migration for it just rollback
rake db:rollback STEP=1
provider another solution based on git
start a new project
rails new project_name cd project_name
git init git commit -m "initial commit"
create a scaffold
rails g scaffold MyScaffold rake db:migrate
rollback the scaffold
rake db:rollback git reset --hard git clean -f -d
rails [option] scaffold scaffold_name
g generate d destroy
If you do
rails g scaffold myFoo
Then reverse it back using
rails d scaffold MyFoo
When we generate scaffold, following files will be created:
rails generate scaffold Game
If we have run the migration after this then we have to rollback the migration first as the deletion of scaffold will remove the migration file too and we will not able to revert that migration.
Incase we have run the migration:
and after this we can safely remove the scaffold by this commad.
rails d scaffold Game
This command will remove all the files created by the scaffold in your project.
Any time you run
rails g, you can reverse it by running
rails d (destroy) to remove what you’ve generated. If you have already run
rake db:migrate, you will need to run
rake db:rollback before destroying 🙂
Case 1: If you run only this command to generate scaffold –
rails generate scaffold MODEL_NAME FIELD_NAME:DATATYPE Ex - rails generate scaffold User name:string address:text
but till now you did not run any command for migration like
then you should need to run only this command like –
rails destroy scaffold User name:string address:text
Case 2: If you already run(Scaffold and Migration) by below commands like –
rails generate scaffold User name:string address:text rake db:migrate
Then you should need to run first rollback migration command then destroy scaffold like below –
rake db:rollback rails destroy scaffold User name:string address:text
So In this manner, we can undo scaffolding. Also we can use d for destroy and g for generate as a shortcut.
rails g scaffold MyFoo
for generating and
rails d scaffold MyFoo