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POEagerloading with scoping in rails3
 

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    <p>I have been trying to eager load associations based on some scope in my rails3 app, but could not find any solution.</p> <p>My app has following models:</p> <pre><code>class Project has_many :entries has_many :to_dos class ToDo has_may :entries has_many :tasks belongs_to :project class Task has_many :entries belongs_to :to_do class Entry belongs_to :project belongs_to :to_do belongs_to :task # options format: {:from_date=&gt;(Date.today-1.week), :to_date=&gt;(Date.today+1.week), :user_id=&gt;60} scope :filtered_list, lambda { |options| condition = options[:user_id].nil? ? "true" : "user_id = #{options[:user_id]}" condition += options[:from_date].nil? ? "" : " AND entry_date &gt;= '#{options[:from_date]}'" condition += options[:to_date].nil? ? "" : " AND entry_date &lt;= '#{options[:to_date]}'" where(condition) } </code></pre> <p>And in projects#index i have following code to get all projects of an user:</p> <pre><code>@projects = current_user.projects.includes(:entries, :to_dos =&gt;[:entries, :tasks =&gt; :entries]) </code></pre> <p>It fetches all projects of the user, along with eager loading the associations. So when i perform following loop to get all the entries within the project, no new query gets fired.</p> <pre><code>def all_entries(options) entries = self.entries self.to_dos.each do |d| entries += d.entries d.tasks.each do |t| entries += t.entries end end end </code></pre> <p>As this eager loading fetches all entries, it is way too much data than what I actually needed. So I tried to apply some conditions to the entries eager loaded, but could not find any solution. I was looking for something like:</p> <pre><code>@projects = current_user.projects.includes(:entries.filtered_list(options), :to_dos =&gt;[:entries.filtered_list(options), :tasks =&gt; :entries.filtered_list(options)]) </code></pre> <p>So that only the entries satisfying some conditions get loaded.</p> <p>Can't we use scoping with eager loading? Please help me out use eagerloading alongside scoping.</p>
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