Question

I have a project_todo model with a boolean attribute ‘status’. How would I display on the index page a loop that only lists project todos that have a status of false?

The regular loop that lists all project todos looks like this:

<% @project.project_todos.each do |todo|%>
    <li data-id="<%= todo.id %>">
        <%= todo.title %>
    </li>
<% end %>

And I was playing around with a loop that only displays the todos IF the status is false by doing this:

<% @project.project_todos {status = "f"}.each do |todo|%>
    <li data-id="<%= todo.id %>">
        <%= todo.title %>
    </li>
<% end %>

Am I anywhere close?

Answer 1

This will loop only on the project_todos that have a status == false :

<% @project.project_todos.select{|project_todos| project_todos.status == false}.each do |todo|%>
    <li data-id="<%= todo.id %>">
        <%= todo.title %>
    </li>
<% end %>

OR, a better solution: you can do the following, and let ActiveRecord filter the project_todos itself:

<% @project.project_todos.where(status: false).each do |todo|%>
    <li data-id="<%= todo.id %>">
        <%= todo.title %>
    </li>
<% end %>

In extansion:

You can create a scope like following:

class ProjectTodo < ActiveRecord::Base
  #...
  scope :with_status, lambda{ |status| where(status: status) }
  #...
end

And use it like this:

@project.project_todos.with_status(status: false) # Returns the project_todos with a status == false and belonging to the @project