Rails db migrate error - ruby-on-rails

Question

I started to write an api in rails. I want to migrate my model to db, but I get this error:
E:\WebAuction\Backend\api>rails db:migrate
rails db:migrate
rails aborted!
StandardError: An error has occurred, all later migrations canceled:
you can't redefine the primary key column 'id'. To define a custom primary key, pass { id: false } to create_table.
E:/WebAuction/Backend/api/db/migrate/20180516070242_create_wa_players.rb:4:in `block in change'
E:/WebAuction/Backend/api/db/migrate/20180516070242_create_wa_players.rb:3:in `change'
bin/rails:4:in `<main>'
Caused by:
ArgumentError: you can't redefine the primary key column 'id'. To define a custom primary key, pass { id: false } to create_table.
E:/WebAuction/Backend/api/db/migrate/20180516070242_create_wa_players.rb:4:in `block in change'
E:/WebAuction/Backend/api/db/migrate/20180516070242_create_wa_players.rb:3:in `change'
bin/rails:4:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
== 20180516070242 CreateWaPlayers: migrating ==================================
-- create_table(:wa_players)
My Model class
class WaPlayer < ApplicationRecord::Base
has_secure_password
def change
create_table :wa_players, :id => false do |t|
t.id :String
t.playerName :String
t.uuid :String
t.password :String
t.money :String
t.itemsSold :String
t.itemsBought :String
t.earnt :String
t.spent :String
t.Permissions :String
t.Locked :String
t.timestamps null: false
end
add_index :wa_players, :id
end
end
If someone knows how to fix, please tell me how.

Answer 1

Don't know where you are getting your activerecord knowledge from, but you seem to have messed it up. It's not a t.<column> <type>. It is t.<type> <column>.
t.string :id
t.string :player_name
And so on.
(Note: most names in ruby follow snake_case naming convention, not camelCase).

Answer 2

From the content provided, it seems like you are heading the wrong way:
Firstly, generating migration for model which seems you have done it as you have shared the model class.
Model Class
class WaPlayer < ApplicationRecord::Base
has_secure_password
end
Thus, there would be migration for the same ie:
def change
create_table :wa_players, :id => false do |t|
t.id :String
t.playerName :String
t.uuid :String
t.password :String
t.money :String
t.itemsSold :String
t.itemsBought :String
t.earnt :String
t.spent :String
t.Permissions :String
t.Locked :String
t.timestamps null: false
end
add_index :wa_players, :id
end
The contents of the migration are wrong which needs to be updated with:
def change
create_table :wa_players, :id => false do |t|
t.string :id
t.string :player_name
t.string :uuid
t.string :password
t.string :money
t.string :items_sold
t.string :items_bought
t.string :earnt
t.string :spent
t.string :permissions
t.string :locked
t.timestamps null: false
end
add_index :wa_players, :id
end
Now you need to run
rake db:create
if the db has not been migrated else run
rake db:migrate.

Answer 3

It will be t.string then column_name like
def change
create_table :wa_players, :id => false do |t|
t.string :id
t.string :player_name
t.string :uuid
t.string :password
t.string :money
t.string :items_sold
t.string :items_bought
t.string :earnt
t.string :spent
t.string :permissions
t.string :locked
t.timestamps null: false
end
add_index :wa_players, :id, unique: true
end
Look at that Creating a Table
Update
I don't know how you trying but follow these steps
run your console like rails g model WaPlayer
Go to db/migrate/TIMESTAMP_create_wa_players.rb
Then paste this change method into class
Then run rails db:migrate or rake db:migrate after rake db:create if you did not create the DB till now