Ability to load relations on /issues API (#7366).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6313 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/issues_controller.rb

@@ -90,7 +90,9 @@ class IssuesController < ApplicationController
 
       respond_to do |format|
         format.html { render :template => 'issues/index.rhtml', :layout => !request.xhr? }
-        format.api
+        format.api  { 
+          Issue.load_relations(@issues) if include_in_api_response?('relations')
+        }
         format.atom { render_feed(@issues, :title => "#{@project || Setting.app_title}: #{l(:label_issue_plural)}") }
         format.csv  { send_data(issues_to_csv(@issues, @project), :type => 'text/csv; header=present', :filename => 'export.csv') }
         format.pdf  { send_data(issues_to_pdf(@issues, @project, @query), :type => 'application/pdf', :filename => 'export.pdf') }

app/models/issue.rb

@@ -508,7 +508,17 @@ class Issue < ActiveRecord::Base
   end
 
   def relations
-    (relations_from + relations_to).sort
+    @relations ||= (relations_from + relations_to).sort
+  end
+  
+  # Preloads relations for a collection of issues
+  def self.load_relations(issues)
+    if issues.any?
+      relations = IssueRelation.all(:conditions => ["issue_from_id IN (:ids) OR issue_to_id IN (:ids)", {:ids => issues.map(&:id)}])
+      issues.each do |issue|
+        issue.instance_variable_set "@relations", relations.select {|r| r.issue_from_id == issue.id || r.issue_to_id == issue.id}
+      end
+    end
   end
   
   # Finds an issue relation given its id.

app/views/issues/index.api.rsb

@@ -23,6 +23,12 @@ api.array :issues, api_meta(:total_count => @issue_count, :offset => @offset, :l
       
       api.created_on issue.created_on
       api.updated_on issue.updated_on
+      
+      api.array :relations do
+        issue.relations.each do |relation|
+          api.relation(:id => relation.id, :issue_id => relation.issue_from_id, :issue_to_id => relation.issue_to_id, :relation_type => relation.relation_type, :delay => relation.delay)
+        end
+      end if include_in_api_response?('relations')
     end
   end
 end