Add a record in Many to many relation fails - ruby

Question

I have a many to many connection in Rails applications, it looks like this:
class Workspace
has_and_belongs_to_many :users, dependent: :destroy
end
class User
has_and_belongs_to_many :workspaces
end
class UserWorkspace
belongs_to :user
belongs_to :workspace
end
Schema:
create_table :users_workspaces do |t|
t.integer :user_id
t.integer :workspace_id
t.integer :role, default: 0
t.timestamps null: false
end
Then I want to create a new record like this:
#user.workspaces.create(:workspace_id => #workspace.id, :role => 1)
or this
#user.workspaces << #workspace
and have an error in logs:
(0.0ms) begin transaction
(0.0ms) begin transaction
(0.1ms) rollback transaction
(0.1ms) rollback transaction
Completed 500 Internal Server Error in 207ms (ActiveRecord: 5.5ms)
Completed 500 Internal Server Error in 207ms (ActiveRecord: 5.5ms)
ActiveRecord::UnknownAttributeError (unknown attribute 'workspace_id' for Workspace.):
app/controllers/sessions_controller.rb:10:in `block in sign_up'
app/controllers/sessions_controller.rb:4:in `sign_up'
What am I doing wrong?
PS Controller:
def sign_up
respond_to do |format|
#user = User.new(user_params)
if #user.save
#workspace = Workspace.new(title: "#{#user.name}'s workspace")
#workspace.save
puts "workspace id: #{#workspace.id}"
#user.workspaces.create(:workspace_id => #workspace.id, :role => 1)
puts "workspaces count: #{#user.workspaces.count}"
#user.workspace = #workspace
#user.update_attributes(user_params)
flash.now[:success] = 'Welcome! Please check activation letter in your email box.'
format.js { render 'signup_message' }
else
format.js { render 'render_signup_errors' }
end
end
end
private
def user_params
params.require(:user).permit(:email, :password, :password_confirmation, :name, :workspace_id)
end

Answer 1

There are couple of problems with your code. For example, you are creating workspaces that are already created (#user.workspaces.create), or permitting a :workspace_id that is not used, etc.
Pleas see code below:
def sign_up
respond_to do |format|
#user = User.new(user_params)
if #user.save
#workspace = Workspace.new(title: "#{#user.name}'s workspace")
if #workspace.save
# Like this
UserWorkspace.create(user: #user, workspace: #workspace, role: 1)
# Or, like this
#user.user_workspaces.create!(workspace_id: #workspace.id, role: 1)
end
flash.now[:success] = 'Welcome! Please check activation letter in your email box.'
format.js { render 'signup_message' }
else
format.js { render 'render_signup_errors' }
end
end
end
private
# You don't need :workspace_id since you are not using it anywhere
def user_params
params.require(:user).permit(:email, :password, :password_confirmation, :name)
end