CODEWITHSUNDEEP
ruby-on-railsrubyactiveadminrails-activerecord
Ain Tohvri
Ain Tohvri

Reputation: 3035

How to prefill ActiveAdmin form value from another model?

In the following code, how does one populate a prefilled form field with a value from another model into the ActiveAdmin form:

ActiveAdmin.register Person do

  index do
    column :forename
    column :surname
    column :code do |p|
      MyCode.find_by_person_id(p.id).code
    end
    column :updated_at
    default_actions
  end

  filter :forename
  filter :surname

  form do |f|
    f.inputs "Person" do
      f.input :forename
      f.input :surname
      # How to get a value here, e.g. MyCode.find_by_person_id(p.id).code as above
      #f.input :code, :input_html => { :value => value??? }, as: :hidden
    end
    f.actions
  end
end

Upvotes: 3

Views: 19205

Answers (2)

Ain Tohvri
Ain Tohvri

Reputation: 3035

As nistvan commented above, has_one relationship fetches the related object into the form object, thus my problem could be solved with: 

ActiveAdmin.register Person do

  index do
    column :forename
    column :surname
    column :code do |p|
      MyCode.find_by_person_id(p.id).code
    end
    column :updated_at
    default_actions
  end

  filter :forename
  filter :surname

  form do |f|
    f.inputs "Person" do
      f.input :forename
      f.input :surname
      f.input :code, :input_html => { :value => f.object.my_code.code }, as: :hidden
    end
    f.actions
  end
end

Upvotes: 15

nistvan
nistvan

Reputation: 2970

If in your model a Person has_one Code, then f.input :code will work fine. Also you don't have to explicit determine the Code in the index block, just: column :code

http://guides.rubyonrails.org/association_basics.html#the-has-one-association

Upvotes: 1

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