Ruby-on-Rails Tutorial Trouble - ruby-on-rails

Question

I am new to both Ruby and Rails. So this may be an easy fix. I'm sorry if it is.
I recently installed Ruby-on-Rails and started following the tutorial on rubyonrails.org which shows how to make a simple blog. Everything was running fine until I got to section 5.5. I went to run db:migrate and it gave me an error.
|D:\Documents\Programs\Ruby\blog>rake db:migrate
== 20141216061542 CreateArticles: migrating ===================================
-- create_table(:articles)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
SQLite3::SQLException: table "articles" already exists: CREATE TABLE "articles" ("id" INTEGER
PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "text" text, "created_at" datetime,
"updated_at"
datetime) D:/Documents/Programs/Ruby/blog/db/migrate/20141216061542_create_articles.rb:3:in
`change
'
C:in `migrate'
ActiveRecord::StatementInvalid: SQLite3::SQLException: table "articles" already exists: CREATE
TABLE
"articles" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar(255), "text" text,
"created_at" datetime, "updated_at" datetime)
D:/Documents/Programs/Ruby/blog/db/migrate/20141216061542_create_articles.rb:3:in `change'
C:in `migrate'
SQLite3::SQLException: table "articles" already exists
D:/Documents/Programs/Ruby/blog/db/migrate/20141216061542_create_articles.rb:3:in `change'
C:in `migrate'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
I fired up the server to see what it would show and it gave me this:
ActiveRecord::PendingMigrationError
Migrations are pending. To resolve this issue, run: bin/rake db:migrate RAILS_ENV=development
It's been doing this ever since. I have tried starting over by deleting the project.(not entirely sure if that was a good move.) I have tried looking over the code. Nothing I have tried has given me any hints on what to do.
Is there any way to get rid of these errors?
Thank you in advance.
EDIT:
I tried to reset the database with 'rake db:reset', but it just gave me this:
|D:\Documents\Programs\Ruby\blog\app\views\articles>rake db:reset
(in D:/Documents/Programs/Ruby/blog)
Permission denied # unlink_internal - D:/Documents/Programs/Ruby/blog/db/development.sqlite3
C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/fileutils.rb:1460:in `unlink'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/fileutils.rb:1460:in `block in remove_file'
C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/fileutils.rb:1468:in `platform_support'
...
rake aborted!
Errno::EACCES: Permission denied # unlink_internal -
D:/Documents/Programs/Ruby/blog/db/development.
sqlite3
Tasks: TOP => db:schema:load
(See full trace by running task with --trace)
I shortened it for readability.
And here is my create_articles migration file:
class CreateArticles < ActiveRecord::Migration
def change
create_table :articles do |t|
t.timestamps
end
end
end

Answer 1

You've already created that particular table. Try this from your terminal:
rake db:drop db:create db:migrate
Or:
rake db:reset db:migrate
So basically, you will start your database from scratch, which will avoid the current error.
Note that for new migrations, you only run the 'rake db:migrate' command otherwise your existing data will be lost.
Later on if you come across this problem in a production environment, ensure that you do 'something else' - surely you wouldn't want to sacrifice your production database data.

Answer 2

Well It seems obvious, you already have table articles, and you are trying to create a new one.
Two options:
comment migration with articles do rake db:migrate, uncomment for other environment (if any)
clear database and run migrations again.
Add create_articles to your question as well, could help resolving the problem.

Answer 3

Drop the db
rake db:drop
And Migrated it once again
rake db:migrate
You have already create articles tables. So you need to drop it and migrate it once again.