Problems with submenu rendering. Menu is built dynamically

[sigm...@gmail.com]

Hello

I build menu dynamically using data from database.

This is @menu variable:

==========

- :key: main1

  :name: Home

  :url: /

- :key: main2

  :name: Services

  :url: /user-research

  :items:

  - :key: sub1

    :name: User research

    :url: /user-research

    :highlights_on: !ruby/regexp /\/user-research/

  - :key: sub2

    :name: Usability review

    :url: /usability-review

    :highlights_on: !ruby/regexp /\/usability-review/

  - :key: sub3

    :name: Interface design

    :url: /user-interface-design

    :highlights_on: !ruby/regexp /\/user-interface-design/

  - :key: sub4

    :name: Usability and UX courses

    :url: /usability-training

    :highlights_on: !ruby/regexp /\/usability-training/

- :key: main3

  :name: Our projects

  :url: /portfolio

- :key: main4

  :name: Contacts

  :url: /contacts

- :key: main5

  :name: Feedback

  :url: /testimonials

- :key: main6

  :name: About

  :url: /about

==========

This is what I have in template:

==========

<%= render_navigation :level => 1, :items => @menu %>

<%= render_navigation :level => 2, :items => @menu %>

==========

When I open /user-research-full (I should not put in menu), "Services" menu item is not highlighted and submenu is not shown.

If to write hardcode everything is fine:

==========

navigation.items do |primary|    

    primary.item :portfolio, "Главная", root_path

    primary.item :services, "Услуги", static_path("user-research"), :highlights_on => /\/services/ do |sub_nav|

      sub_nav.item :analysis_of_audience, "Анализ пользователей", static_path("user-research"), :highlights_on => /\/user-research/

      sub_nav.item :ux_review, "Юзабилити-аудит", static_path("usability-review"), :highlights_on => /\/usability-review/

      sub_nav.item :ui_design, "Проектирование интерфейсов", static_path("user-interface-design"), :highlights_on => /\/user-interface-design/

      sub_nav.item :'usability-training', "Обучение", static_path("usability-training"), :highlights_on => /\/usability-training/

    end

    primary.item :portfolio, "Наши работы", projects_path

    primary.item :testimonials, "Отзывы", testimonials_path

    primary.item :about, "О нас", static_path(:about)

    primary.item :contacts, "Контакты", static_path(:contacts)

end

==========

But I need to build menu dynamically. 

Simple Navigation  version is 3.7.0.

Could you help me to solve this problem?

[Andi Schacke]

Hi there,

I didn't have time yet to anaylize your problem in great detail. But maybe the problem is that the content of your @menu variable is yaml. It should be a Hash. There is even an easier way: in the master branch (currently not released as gem, I will release 3.9.0 on the weekend) there is a new option: You can pass a block to render_navigation to dynamically build your navigation:

render_navigation :level => 1 do |primary|

  primary.item …

  primary.item …

end

The syntax is the same as in the config file. 

If you don't want to specify the block again for your two render_navigation calls, you can define a method that return the block, e.g.

def my_dynamic_menu

  Proc.new do |primary|

     primary.item...

  end

end

and then you call

render_navigation :level => 1, &my_dynamic_menu

render_navigation :level => 2, &my_dynamic_menu

As I said, the gem for this is not released yet, so to do this, you have to add this to your gemfile:

gem 'simple-navigation', :git => 'git://github.com/andi/simple-navigation.git'

I hope this helps!

Andi

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[sigm...@gmail.com]

No. This is @menu.to_yaml(). I often use this format for debugging. It is more handy than inspect().

Your solution did the job. The problem was in strange behavior of highlights_on if to use hash. I made block instead of hash and everything is working good.

Thank you very much for quick response!

[Andi Schacke]

That's good to hear. By the way: the newest gem (3.9.0) includes the new "block" feature.

Andi

To view this discussion on the web visit https://groups.google.com/d/msg/simple-navigation/-/nNzpQFOlKhEJ.

[extreme....@gmail.com]

Hi,

I am busy working on building a dynamically generated menu and I have gone through the documentation but do not quite understand how the use of a Proc will generate the dynamic menu. From what I understand of the example, each item is still manually declared within the Proc (am I still a little new to Ruby so may just be confused).

I have a database table that holds various dynamic pages for a website (table columns being:  "id, "parent_id", "name", "content") and there can theoretically be an infinite number of nested pages. Past programming experience tells me that this is a suitable situation for recursion and do I have simple recursive method defined which more or less should do what I think (haven't been able to test it out yet as I dont think simple-navigation likes it) but this is it here:

SimpleNavigation::Configuration.run do |navigation|

  navigation.items do |primary|

     # recursive function to generate the pages

    def walktree(db, parent)

      sub_items = pages_menu.where(parent_id: db.id)

      if sub_items.count > 0

        parent.item db.name,db.name,pandora_content_path(db.id), class: "has-dropdown" do |s|

          s.dom_class="dropdown"

          sub_items.each do |ddItem|

            walktree(ddItem, s)

          end

        end

      else

        parent.item db.name,db.name,pandora_content_path(db.id)

      end

    end

    #generate dynamic pages menus

    pages_menu.where(parent_id: nil).each do |menu|

      if menu.is_visible

        walktree(menu, primary)

      end

    end

  end

end

Since navigation.rb is just a ruby file and going by ruby logic that everything in ruby is an object, I do not see why I should not be able to do something similar to this. 

Any insight you could provide me with would be most appreciated.

Kind regards,

Braden

[extreme....@gmail.com]

Never mind.. I got it working. Was a bug in my model code.. A fully dynamic menu can be done using the below code:

SimpleNavigation::Configuration.run do |navigation|

  navigation.items do |primary|

    def walktree(db, parent)

      sub_items = pages_menu.where(parent_id: db.id)

      if sub_items.count > 0

        parent.item db.name,db.name,my_content_path(db.id), class: "has-dropdown" do |s|

          s.dom_class="dropdown"

          sub_items.each do |ddItem|

            walktree(ddItem, s)

          end

        end

      else

        parent.item db.name,db.name,my_content_path(db.id)

      end

    end

    primary.dom_class='right'

    #dynamic pages menus

    pages_menu.where(parent_id: '0').each do |menu|