CODEWITHSUNDEEP
ruby-on-rails-3model
drmwndr
drmwndr

Reputation: 94

Change Attribute of another table

I have the table "tools" and "lend".

Im using Rails3 and when i create a lend i would like it change the attribute status of the tool to 'U'.

Would this is possible?

i tried on the model lend

 after_save :change_status

  def change_status
      tools.update_attribute(status, 'U')
  end

i tried too, on the same model:

 after_save :change_status

  def change_status
      self.tool.update_attribute(status, 'U')
  end

No success or warning on debug log.

Sugestions?

Thanks! :)

Upvotes: 0

Views: 120

Answers (2)

Theo Scholiadis
Theo Scholiadis

Reputation: 2396

Firstly, I assume that your Lend model has_many :tools

In order to be able to do something like tool.update_attribute you'll need to work with the accepts_nested_attributes_for

Take a look at these links and they will probably set you on the right path:
RailsCasts #196 Nested Model Form Part 1
Active Record Nested Attributes

Hope this helps.

Upvotes: 0

Alain
Alain

Reputation: 1251

What is the relationship between lend and tool? If Lend has_many tools, you will have to do something like this:

def change_status
  tools.each { |tool| tool.update_attributes(status: 'U') }
end

Note also that I am using update_attributes because update_attribute (singular) will be deprecated soon.

BTW, you should create a method in Tool to update the attribute, the Lend model should not be aware about how to set a tool as loaned. Something like

def loaned!
  update_attributes status: 'U'
end

Upvotes: 0

Related Questions