强参数Rails 4.1

Question

Any idea why this isn't working?

def user_params
  params.require(:user).permit({:book_ids => []}, :first_name, :last_name, :email, :password, :password_confirmation, :title, :company, :phone, :business_email, :business_phone)
end

Unpermitted parameters: book_ids

Answer 1

Use this:

def user_params
  params.require(:user).permit(:first_name, :last_name, :email, :password, :password_confirmation, :title, :company, :phone, :business_email, :business_phone, :book_ids => [])
end

You must be passing book_ids as an array in your params, in that case you should permit them as :book_ids => [] and also at the end.

As per the chat session, OP had an issue with the drop down as it was set as multiple: false instead of multiple: true . Also, in order to facilitate the update action, a selected option needs to be specified.