How to insert record to database from the model in Rails?

Question

My Profiles controller:

def change_cover
    @cover_name = params[:cover]

    Profile.cover_name(@cover_name, session[:username])
end

My Model:

def self.cover_name(is, username)
    Profile.new(:cover_name => is, :username => username).save
end

But it prints the next error:

ActiveRecord::UnknownAttributeError (unknown attribute: cover_name):
app/models/profile.rb:7:in `cover_name'
app/controllers/profiles_controller.rb:22:in `change_cover'

So, how can I insert it?

Answer 1

This error generates because your database table assuming your module has default settings, profiles doesnot have a column called cover_name

You can do two things to test this

1 ) Check your DB directly. Example code in mysql

 `desc profiles`

2 ) Login to your rails console and type

`Profile.new`

Answer 2

You are trying to create Profile with attribute profile_name and since profile has no attribute like profile_name it throws this error,

I guess you wanted to something like

def self.cover_name(covername, username)
    ProfileCover.create(cover_name: covername, username: username)
end

Also, I see no association in your schema.rb, but I guess the profile cover should somehow be associated to your profile so you should do a migration creating one

rails g migration AddProfileToProfileCovers profile:belongs_to

In profile_cover.rb do

belongs_to :profile

In profile.rb

has_one :provile_cover

and update your method

def cover_name(covername, username)
    self.profile_cover.create(cover_name: covername, username: username)
end

and call it with @profile.cover_name(covername, username)

or the other way around (not recommended)

def self.cover_name(covername, username, profile)
    profile.profile_cover.create(cover_name: covername, username: username)
end

and call it with Profile.cover_name(covername, username, profile)