Enable to pass html options to URL field

app/views/fields/url/_show.html.erb

@@ -15,6 +15,6 @@ By default, the value is rendered as an `a` element.
 [1]: http://www.rubydoc.info/gems/administrate/Administrate/Field/Url
 %>
 
-<%= content_tag :a, href: field.data do %>
+<%= content_tag :a, href: field.data, **field.html_options do %>
   <%= field.data %>
 <% end %>

docs/customizing_dashboards.md

@@ -250,6 +250,9 @@ Default is `true`.
 `:truncate` - Set the number of characters to display in the index view.
 Defaults to `50`.
 
+`:html_options` - Specify anchor tag attributes (e.g., `target="_blank"`).
+Defaults is `{}`.
+
 **Field::Password**
 
 `:searchable` - Specify if the attribute should be considered when searching.

lib/administrate/field/url.rb

@@ -11,6 +11,10 @@ def truncate
         data.to_s[0...truncation_length]
       end
 
+      def html_options
+        @options[:html_options] || {}
+      end
+
       private
 
       def truncation_length

spec/administrate/views/fields/url/_show_spec.rb

@@ -1,12 +1,15 @@
 require "rails_helper"
 
 describe "fields/url/_show", type: :view do
+  let(:product) do
+    build(:product, image_url: "https://thoughtbot.com/image.jpg")
+  end
+
   it "renders url" do
-    product = create(:product, image_url: "https://thoughtbot.com/image.jpg")
     url = instance_double(
       "Administrate::Field::Url",
       data: product.image_url,
-      attribute: :image_url,
+      html_options: {},
     )
 
     render(
@@ -19,4 +22,22 @@
       text: product.image_url,
     )
   end
+
+  it "renders extra html options" do
+    url = instance_double(
+      "Administrate::Field::Url",
+      data: product.image_url,
+      html_options: { target: :_blank },
+    )
+
+    render(
+      partial: "fields/url/show",
+      locals: { field: url, namespace: :admin },
+    )
+
+    expect(rendered).to have_css(
+      %{a[href="#{product.image_url}"][target="_blank"]},
+      text: product.image_url,
+    )
+  end
 end