CODEWITHSUNDEEP
ruby-on-rails
Adam
Adam

Reputation: 17

How to iterate over a collection of associated items in a Rails view

I have two models: 

class WorkPlan < ActiveRecord::Base
  has_many :work_plan_tasks
end 

class WorkPlanTask < ActiveRecord::Base
  belongs_to :work_plan
end

My form and index actions all work as expected with the associations.

I'm trying to modify the show view for a work plan such that it displays the work plan tasks that belongs to the work plan in question.

I added the code below at the bottom of my show view for work plans, but it keeps blowing up and I've spent far too much time tinkering with the code.

Any help would be greatly appreciated.

<% @work_plan.work_plan_task in @work_plan_task %>
    <%= work_plan_task.task_name %?
<% end %>

Upvotes: 1

Views: 68

Answers (1)

Tim Sullivan
Tim Sullivan

Reputation: 16888

That's not generally how you loop through items in Rails views. Try this:

<% @work_plan.work_plan_tasks.each do |work_plan_task| %>
    <%= work_plan_task.task_name %>
<% end %>

The each call does what you expect: go through the array, passing the item via work_plan_task into the loop.

If you wanted to do it the way you were writing it, you have the syntax backward.

<% for work_plan_task in @work_plan.work_plan_tasks %>
    <%= work_plan_task.task_name %>
<% end %>

... though honestly I don't even know if that would work, I've never actually tried. :-)

Finally, notice that @work_plan_task and work_plan_task are different variables.

Upvotes: 3

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