Arbre Components

Arbre allows the creation of shareable and extendable HTML components and is used throughout Active Admin to create view components.

Text Node

Sometimes it makes sense to insert something into a registered resource like a non-breaking space or some text. The text_node method can be used to insert these elements into the page inside of other Arbre components or resource controller functions.

ActiveAdmin.register Post do
  show do
    panel "Post Details" do
      attributes_table_for post do
        row :id
        row 'Tags' do
          post.tags.each do |tag|
            a tag, href: admin_post_path(q: {tagged_with_contains: tag})          
            text_node "&nbsp".html_safe
          end
        end
      end
    end
  end
end

Panels

A panel is a component that takes up all available horizontal space and takes a title and a hash of attributes as arguments. If a sidebar is present, a panel will take up the remaining space.

This will create two stacked panels:

show do
  panel "Post Details" do
    render partial: "details", locals: {post: post}
  end

  panel "Post Tags" do
    render partial: "tags",    locals: {post: post}
  end
end

Columns

The Columns component allows you draw content into scalable columns. All you need to do is define the number of columns and the component will take care of the rest.

Simple Columns

To create simple columnns, use the columns method. Within the block, call the #column method to create a new column.

columns do
  column do
    span "Column #1"
  end

  column do
    span "Column #2"
  end
end

Spanning Multiple Columns

To create columns that have multiple spans, pass the :span option to the column method.

columns do
  column span: 2 do
    span "Column # 1"
  end
  column do
    span "Column # 2"
  end
end

By default, each column spans 1 column. The above layout would have 2 columns, the first being twice as large as the second.

Custom Column Widths

Active Admin uses a fluid width layout, causing column width to be defined using percentages. Due to using this style of layout, columns can shrink or expand past points that may not be desirable. To overcome this issue, columns provide :max_width and :min_width options.

columns do
  column max_width: "200px", min_width: "100px" do
    span "Column # 1"
  end
  column do
    span "Column # 2"
  end
end

In the above example, the first column will not grow larger than 200px and will not shrink less than 100px.

Table For

Table For provides the ability to create tables like those present in index_as_table. It takes a collection and a hash of options and then uses column to build the fields to show with the table.

table_for order.payments do
  column(:payment_type) { |payment| payment.payment_type.titleize }
  column "Received On",     :created_at
  column "Details & Notes", :payment_details
  column "Amount",          :amount_in_dollars
end

the column method can take a title as its first argument and data (:your_method) as its second (or first if no title provided). Column also takes a block.

Status tag

Status tags provide convenient syntactic sugar for styling items that have status. A common example of where the status tag could be useful is for orders that are complete or in progress. status_tag takes a status, like "In Progress", a type, which defaults to nil, and a hash of options. The status_tag will generate html markup that Active Admin css uses in styling.

status_tag 'In Progress'
# => <span class='status_tag in_progress'>In Progress</span>

status_tag 'active', :ok
# => <span class='status_tag active ok'>Active</span>

status_tag 'active', :ok, class: 'important', id: 'status_123', label: 'on'
# => <span class='status_tag active ok important' id='status_123'>on</span>
Copyright 2011 Greg Bell and VersaPay