comparison app/models/.svn/text-base/issue.rb.svn-base @ 511:107d36338b70 live

Merge from branch "cannam"

-# redMine - project management software
-# Copyright (C) 2006-2007  Jean-Philippe Lang
+# Redmine - project management software
+# Copyright (C) 2006-2011  Jean-Philippe Lang
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; either version 2
 # of the License, or (at your option) any later version.
-# 
+#
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
-# 
+#
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class Issue < ActiveRecord::Base
+  include Redmine::SafeAttributes
+
   belongs_to :project
   belongs_to :tracker
   belongs_to :status, :class_name => 'IssueStatus', :foreign_key => 'status_id'
   belongs_to :author, :class_name => 'User', :foreign_key => 'author_id'
   belongs_to :assigned_to, :class_name => 'User', :foreign_key => 'assigned_to_id'

   belongs_to :category, :class_name => 'IssueCategory', :foreign_key => 'category_id'
 
   has_many :journals, :as => :journalized, :dependent => :destroy
   has_many :time_entries, :dependent => :delete_all
   has_and_belongs_to_many :changesets, :order => "#{Changeset.table_name}.committed_on ASC, #{Changeset.table_name}.id ASC"
-  
+
   has_many :relations_from, :class_name => 'IssueRelation', :foreign_key => 'issue_from_id', :dependent => :delete_all
   has_many :relations_to, :class_name => 'IssueRelation', :foreign_key => 'issue_to_id', :dependent => :delete_all
-  
-  acts_as_nested_set :scope => 'root_id'
+
+  acts_as_nested_set :scope => 'root_id', :dependent => :destroy
   acts_as_attachable :after_remove => :attachment_removed
   acts_as_customizable
   acts_as_watchable
   acts_as_searchable :columns => ['subject', "#{table_name}.description", "#{Journal.table_name}.notes"],
                      :include => [:project, :journals],
                      # sort by id so that limited eager loading doesn't break with postgresql
                      :order_column => "#{table_name}.id"
   acts_as_event :title => Proc.new {|o| "#{o.tracker.name} ##{o.id} (#{o.status}): #{o.subject}"},
                 :url => Proc.new {|o| {:controller => 'issues', :action => 'show', :id => o.id}},
                 :type => Proc.new {|o| 'issue' + (o.closed? ? ' closed' : '') }
-  
+
   acts_as_activity_provider :find_options => {:include => [:project, :author, :tracker]},
                             :author_key => :author_id
 
   DONE_RATIO_OPTIONS = %w(issue_field issue_status)
 

   validates_length_of :subject, :maximum => 255
   validates_inclusion_of :done_ratio, :in => 0..100
   validates_numericality_of :estimated_hours, :allow_nil => true
 
   named_scope :visible, lambda {|*args| { :include => :project,
-                                          :conditions => Project.allowed_to_condition(args.first || User.current, :view_issues) } }
-  
+                                          :conditions => Issue.visible_condition(args.shift || User.current, *args) } }
+
   named_scope :open, :conditions => ["#{IssueStatus.table_name}.is_closed = ?", false], :include => :status
 
   named_scope :recently_updated, :order => "#{Issue.table_name}.updated_on DESC"
   named_scope :with_limit, lambda { |limit| { :limit => limit} }
   named_scope :on_active_project, :include => [:status, :project, :tracker],
                                   :conditions => ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE}"]
-  named_scope :for_gantt, lambda {
-    {
-      :include => [:tracker, :status, :assigned_to, :priority, :project, :fixed_version],
-      :order => "#{Issue.table_name}.due_date ASC, #{Issue.table_name}.start_date ASC, #{Issue.table_name}.id ASC"
-    }
-  }
 
   named_scope :without_version, lambda {
     {
       :conditions => { :fixed_version_id => nil}
     }

   }
 
   before_create :default_assign
   before_save :close_duplicates, :update_done_ratio_from_issue_status
   after_save :reschedule_following_issues, :update_nested_set_attributes, :update_parent_attributes, :create_journal
-  after_destroy :destroy_children
   after_destroy :update_parent_attributes
-  
+
+  # Returns a SQL conditions string used to find all issues visible by the specified user
+  def self.visible_condition(user, options={})
+    Project.allowed_to_condition(user, :view_issues, options) do |role, user|
+      case role.issues_visibility
+      when 'all'
+        nil
+      when 'default'
+        "(#{table_name}.is_private = #{connection.quoted_false} OR #{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id = #{user.id})"
+      when 'own'
+        "(#{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id = #{user.id})"
+      else
+        '1=0'
+      end
+    end
+  end
+
   # Returns true if usr or current user is allowed to view the issue
   def visible?(usr=nil)
-    (usr || User.current).allowed_to?(:view_issues, self.project)
-  end
-  
+    (usr || User.current).allowed_to?(:view_issues, self.project) do |role, user|
+      case role.issues_visibility
+      when 'all'
+        true
+      when 'default'
+        !self.is_private? || self.author == user || self.assigned_to == user
+      when 'own'
+        self.author == user || self.assigned_to == user
+      else
+        false
+      end
+    end
+  end
+
   def after_initialize
     if new_record?
       # set default values for new records only
       self.status ||= IssueStatus.default
       self.priority ||= IssuePriority.default
     end
   end
-  
+
   # Overrides Redmine::Acts::Customizable::InstanceMethods#available_custom_fields
   def available_custom_fields
-    (project && tracker) ? project.all_issue_custom_fields.select {|c| tracker.custom_fields.include? c } : []
-  end
-  
+    (project && tracker) ? (project.all_issue_custom_fields & tracker.custom_fields.all) : []
+  end
+
   def copy_from(arg)
     issue = arg.is_a?(Issue) ? arg : Issue.visible.find(arg)
     self.attributes = issue.attributes.dup.except("id", "root_id", "parent_id", "lft", "rgt", "created_on", "updated_on")
     self.custom_field_values = issue.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
     self.status = issue.status
     self
   end
-  
+
   # Moves/copies an issue to a new project and tracker
   # Returns the moved/copied issue on success, false on failure
   def move_to_project(*args)
     ret = Issue.transaction do
       move_to_project_without_transaction(*args) || raise(ActiveRecord::Rollback)
     end || false
   end
-  
+
   def move_to_project_without_transaction(new_project, new_tracker = nil, options = {})
     options ||= {}
     issue = options[:copy] ? self.class.new.copy_from(self) : self
-    
+
     if new_project && issue.project_id != new_project.id
       # delete issue relations
       unless Setting.cross_project_issue_relations?
         issue.relations_from.clear
         issue.relations_to.clear

     if new_tracker
       issue.tracker = new_tracker
       issue.reset_custom_values!
     end
     if options[:copy]
+      issue.author = User.current
       issue.custom_field_values = self.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
       issue.status = if options[:attributes] && options[:attributes][:status_id]
                        IssueStatus.find_by_id(options[:attributes][:status_id])
                      else
                        self.status

     # Allow bulk setting of attributes on the issue
     if options[:attributes]
       issue.attributes = options[:attributes]
     end
     if issue.save
-      unless options[:copy]
+      if options[:copy]
+        if current_journal && current_journal.notes.present?
+          issue.init_journal(current_journal.user, current_journal.notes)
+          issue.current_journal.notify = false
+          issue.save
+        end
+      else
         # Manually update project_id on related time entries
         TimeEntry.update_all("project_id = #{new_project.id}", {:issue_id => id})
-        
+
         issue.children.each do |child|
           unless child.move_to_project_without_transaction(new_project)
             # Move failed and transaction was rollback'd
             return false
           end

 
   def status_id=(sid)
     self.status = nil
     write_attribute(:status_id, sid)
   end
-  
+
   def priority_id=(pid)
     self.priority = nil
     write_attribute(:priority_id, pid)
   end
 

     result = write_attribute(:tracker_id, tid)
     @custom_field_values = nil
     result
   end
   
+  def description=(arg)
+    if arg.is_a?(String)
+      arg = arg.gsub(/(\r\n|\n|\r)/, "\r\n")
+    end
+    write_attribute(:description, arg)
+  end
+
   # Overrides attributes= so that tracker_id gets assigned first
   def attributes_with_tracker_first=(new_attributes, *args)
     return if new_attributes.nil?
     new_tracker_id = new_attributes['tracker_id'] || new_attributes[:tracker_id]
     if new_tracker_id

     end
     send :attributes_without_tracker_first=, new_attributes, *args
   end
   # Do not redefine alias chain on reload (see #4838)
   alias_method_chain(:attributes=, :tracker_first) unless method_defined?(:attributes_without_tracker_first=)
-  
+
   def estimated_hours=(h)
     write_attribute :estimated_hours, (h.is_a?(String) ? h.to_hours : h)
   end
-  
-  SAFE_ATTRIBUTES = %w(
-    tracker_id
-    status_id
-    parent_issue_id
-    category_id
-    assigned_to_id
-    priority_id
-    fixed_version_id
-    subject
-    description
-    start_date
-    due_date
-    done_ratio
-    estimated_hours
-    custom_field_values
-    lock_version
-  ) unless const_defined?(:SAFE_ATTRIBUTES)
-  
-  SAFE_ATTRIBUTES_ON_TRANSITION = %w(
-    status_id
-    assigned_to_id
-    fixed_version_id
-    done_ratio
-  ) unless const_defined?(:SAFE_ATTRIBUTES_ON_TRANSITION)
+
+  safe_attributes 'tracker_id',
+    'status_id',
+    'parent_issue_id',
+    'category_id',
+    'assigned_to_id',
+    'priority_id',
+    'fixed_version_id',
+    'subject',
+    'description',
+    'start_date',
+    'due_date',
+    'done_ratio',
+    'estimated_hours',
+    'custom_field_values',
+    'custom_fields',
+    'lock_version',
+    :if => lambda {|issue, user| issue.new_record? || user.allowed_to?(:edit_issues, issue.project) }
+
+  safe_attributes 'status_id',
+    'assigned_to_id',
+    'fixed_version_id',
+    'done_ratio',
+    :if => lambda {|issue, user| issue.new_statuses_allowed_to(user).any? }
+
+  safe_attributes 'is_private',
+    :if => lambda {|issue, user|
+      user.allowed_to?(:set_issues_private, issue.project) ||
+        (issue.author == user && user.allowed_to?(:set_own_issues_private, issue.project))
+    }
 
   # Safely sets attributes
   # Should be called from controllers instead of #attributes=
   # attr_accessible is too rough because we still want things like
   # Issue.new(:project => foo) to work
   # TODO: move workflow/permission checks from controllers to here
   def safe_attributes=(attrs, user=User.current)
     return unless attrs.is_a?(Hash)
-    
+
     # User can change issue attributes only if he has :edit permission or if a workflow transition is allowed
-    if new_record? || user.allowed_to?(:edit_issues, project)
-      attrs = attrs.reject {|k,v| !SAFE_ATTRIBUTES.include?(k)}
-    elsif new_statuses_allowed_to(user).any?
-      attrs = attrs.reject {|k,v| !SAFE_ATTRIBUTES_ON_TRANSITION.include?(k)}
-    else
-      return
-    end
-    
+    attrs = delete_unsafe_attributes(attrs, user)
+    return if attrs.empty?
+
     # Tracker must be set before since new_statuses_allowed_to depends on it.
     if t = attrs.delete('tracker_id')
       self.tracker_id = t
     end
-    
+
     if attrs['status_id']
       unless new_statuses_allowed_to(user).collect(&:id).include?(attrs['status_id'].to_i)
         attrs.delete('status_id')
       end
     end
-    
+
     unless leaf?
       attrs.reject! {|k,v| %w(priority_id done_ratio start_date due_date estimated_hours).include?(k)}
     end
-    
+
     if attrs.has_key?('parent_issue_id')
       if !user.allowed_to?(:manage_subtasks, project)
         attrs.delete('parent_issue_id')
       elsif !attrs['parent_issue_id'].blank?
-        attrs.delete('parent_issue_id') unless Issue.visible(user).exists?(attrs['parent_issue_id'])
-      end
-    end
-    
+        attrs.delete('parent_issue_id') unless Issue.visible(user).exists?(attrs['parent_issue_id'].to_i)
+      end
+    end
+
     self.attributes = attrs
   end
-  
+
   def done_ratio
     if Issue.use_status_for_done_ratio? && status && status.default_done_ratio
       status.default_done_ratio
     else
       read_attribute(:done_ratio)

   end
 
   def self.use_field_for_done_ratio?
     Setting.issue_done_ratio == 'issue_field'
   end
-  
+
   def validate
     if self.due_date.nil? && @attributes['due_date'] && !@attributes['due_date'].empty?
       errors.add :due_date, :not_a_date
     end
-    
+
     if self.due_date and self.start_date and self.due_date < self.start_date
       errors.add :due_date, :greater_than_start_date
     end
-    
+
     if start_date && soonest_start && start_date < soonest_start
       errors.add :start_date, :invalid
     end
-    
+
     if fixed_version
       if !assignable_versions.include?(fixed_version)
         errors.add :fixed_version_id, :inclusion
       elsif reopened? && fixed_version.closed?
         errors.add_to_base I18n.t(:error_can_not_reopen_issue_on_closed_version)
       end
     end
-    
+
     # Checks that the issue can not be added/moved to a disabled tracker
     if project && (tracker_id_changed? || project_id_changed?)
       unless project.trackers.include?(tracker)
         errors.add :tracker_id, :inclusion
       end
     end
-    
+
     # Checks parent issue assignment
     if @parent_issue
       if @parent_issue.project_id != project_id
         errors.add :parent_issue_id, :not_same_project
       elsif !new_record?

           errors.add :parent_issue_id, :not_a_valid_parent
         end
       end
     end
   end
-  
+
   # Set the done_ratio using the status if that setting is set.  This will keep the done_ratios
   # even if the user turns off the setting later
   def update_done_ratio_from_issue_status
     if Issue.use_status_for_done_ratio? && status && status.default_done_ratio
       self.done_ratio = status.default_done_ratio
     end
   end
-  
+
   def init_journal(user, notes = "")
     @current_journal ||= Journal.new(:journalized => self, :user => user, :notes => notes)
     @issue_before_change = self.clone
     @issue_before_change.status = self.status
     @custom_values_before_change = {}
     self.custom_values.each {|c| @custom_values_before_change.store c.custom_field_id, c.value }
     # Make sure updated_on is updated when adding a note.
     updated_on_will_change!
     @current_journal
   end
-  
+
   # Return true if the issue is closed, otherwise false
   def closed?
     self.status.is_closed?
   end
-  
+
   # Return true if the issue is being reopened
   def reopened?
     if !new_record? && status_id_changed?
       status_was = IssueStatus.find_by_id(status_id_was)
       status_new = IssueStatus.find_by_id(status_id)

         return true
       end
     end
     false
   end
-  
+
   # Returns true if the issue is overdue
   def overdue?
     !due_date.nil? && (due_date < Date.today) && !status.is_closed?
   end
 

 
   # Does this issue have children?
   def children?
     !leaf?
   end
-  
+
   # Users the issue can be assigned to
   def assignable_users
     users = project.assignable_users
     users << author if author
     users.uniq.sort
   end
-  
+
   # Versions that the issue can be assigned to
   def assignable_versions
     @assignable_versions ||= (project.shared_versions.open + [Version.find_by_id(fixed_version_id_was)]).compact.uniq.sort
   end
-  
+
   # Returns true if this issue is blocked by another issue that is still open
   def blocked?
     !relations_to.detect {|ir| ir.relation_type == 'blocks' && !ir.issue_from.closed?}.nil?
   end
-  
+
   # Returns an array of status that user is able to apply
   def new_statuses_allowed_to(user, include_default=false)
-    statuses = status.find_new_statuses_allowed_to(user.roles_for_project(project), tracker)
+    statuses = status.find_new_statuses_allowed_to(
+      user.roles_for_project(project),
+      tracker,
+      author == user,
+      assigned_to_id_changed? ? assigned_to_id_was == user.id : assigned_to_id == user.id
+      )
     statuses << status unless statuses.empty?
     statuses << IssueStatus.default if include_default
     statuses = statuses.uniq.sort
     blocked? ? statuses.reject {|s| s.is_closed?} : statuses
   end
-  
+
   # Returns the mail adresses of users that should be notified
   def recipients
     notified = project.notified_users
     # Author and assignee are always notified unless they have been
     # locked or don't want to be notified

     notified.uniq!
     # Remove users that can not view the issue
     notified.reject! {|user| !visible?(user)}
     notified.collect(&:mail)
   end
-  
+
   # Returns the total number of hours spent on this issue and its descendants
   #
   # Example:
   #   spent_hours => 0.0
   #   spent_hours => 50.2
   def spent_hours
     @spent_hours ||= self_and_descendants.sum("#{TimeEntry.table_name}.hours", :include => :time_entries).to_f || 0.0
   end
-  
+
   def relations
     (relations_from + relations_to).sort
   end
-  
-  def all_dependent_issues
+
+  def all_dependent_issues(except=[])
+    except << self
     dependencies = []
     relations_from.each do |relation|
-      dependencies << relation.issue_to
-      dependencies += relation.issue_to.all_dependent_issues
+      if relation.issue_to && !except.include?(relation.issue_to)
+        dependencies << relation.issue_to
+        dependencies += relation.issue_to.all_dependent_issues(except)
+      end
     end
     dependencies
   end
-  
+
   # Returns an array of issues that duplicate this one
   def duplicates
     relations_to.select {|r| r.relation_type == IssueRelation::TYPE_DUPLICATES}.collect {|r| r.issue_from}
   end
-  
+
   # Returns the due date or the target due date if any
   # Used on gantt chart
   def due_before
     due_date || (fixed_version ? fixed_version.effective_date : nil)
   end
-  
+
   # Returns the time scheduled for this issue.
-  # 
+  #
   # Example:
   #   Start Date: 2/26/09, End Date: 3/04/09
   #   duration => 6
   def duration
     (start_date && due_date) ? due_date - start_date : 0
   end
-  
+
   def soonest_start
     @soonest_start ||= (
         relations_to.collect{|relation| relation.successor_soonest_start} +
         ancestors.collect(&:soonest_start)
       ).compact.max
   end
-  
+
   def reschedule_after(date)
     return if date.nil?
     if leaf?
       if start_date.nil? || start_date < date
         self.start_date, self.due_date = date, date + duration

       leaves.each do |leaf|
         leaf.reschedule_after(date)
       end
     end
   end
-  
+
   def <=>(issue)
     if issue.nil?
       -1
     elsif root_id != issue.root_id
       (root_id || 0) <=> (issue.root_id || 0)
     else
       (lft || 0) <=> (issue.lft || 0)
     end
   end
-  
+
   def to_s
     "#{tracker} ##{id}: #{subject}"
   end
-  
+
   # Returns a string of css classes that apply to the issue
   def css_classes
     s = "issue status-#{status.position} priority-#{priority.position}"
     s << ' closed' if closed?
     s << ' overdue' if overdue?
+    s << ' child' if child?
+    s << ' parent' unless leaf?
+    s << ' private' if is_private?
     s << ' created-by-me' if User.current.logged? && author_id == User.current.id
     s << ' assigned-to-me' if User.current.logged? && assigned_to_id == User.current.id
     s
   end
 
   # Saves an issue, time_entry, attachments, and a journal from the parameters
   # Returns false if save fails
   def save_issue_with_child_records(params, existing_time_entry=nil)
     Issue.transaction do
-      if params[:time_entry] && params[:time_entry][:hours].present? && User.current.allowed_to?(:log_time, project)
+      if params[:time_entry] && (params[:time_entry][:hours].present? || params[:time_entry][:comments].present?) && User.current.allowed_to?(:log_time, project)
         @time_entry = existing_time_entry || TimeEntry.new
         @time_entry.project = project
         @time_entry.issue = self
         @time_entry.user = User.current
         @time_entry.spent_on = Date.today
         @time_entry.attributes = params[:time_entry]
         self.time_entries << @time_entry
       end
-  
+
       if valid?
         attachments = Attachment.attach_files(self, params[:attachments])
-  
+
         attachments[:files].each {|a| @current_journal.details << JournalDetail.new(:property => 'attachment', :prop_key => a.id, :value => a.filename)}
         # TODO: Rename hook
         Redmine::Hook.call_hook(:controller_issues_edit_before_save, { :params => params, :issue => self, :time_entry => @time_entry, :journal => @current_journal})
         begin
           if save

   # Unassigns issues from +version+ if it's no longer shared with issue's project
   def self.update_versions_from_sharing_change(version)
     # Update issues assigned to the version
     update_versions(["#{Issue.table_name}.fixed_version_id = ?", version.id])
   end
-  
+
   # Unassigns issues from versions that are no longer shared
   # after +project+ was moved
   def self.update_versions_from_hierarchy_change(project)
     moved_project_ids = project.self_and_descendants.reload.collect(&:id)
     # Update issues of the moved projects and issues assigned to a version of a moved project

     else
       @parent_issue = nil
       nil
     end
   end
-  
+
   def parent_issue_id
     if instance_variable_defined? :@parent_issue
       @parent_issue.nil? ? nil : @parent_issue.id
     else
       parent_id

   end
 
   def self.by_subproject(project)
     ActiveRecord::Base.connection.select_all("select    s.id as status_id, 
                                                 s.is_closed as closed, 
-                                                i.project_id as project_id,
-                                                count(i.id) as total 
+                                                #{Issue.table_name}.project_id as project_id,
+                                                count(#{Issue.table_name}.id) as total 
                                               from 
-                                                #{Issue.table_name} i, #{IssueStatus.table_name} s
+                                                #{Issue.table_name}, #{Project.table_name}, #{IssueStatus.table_name} s
                                               where 
-                                                i.status_id=s.id 
-                                                and i.project_id IN (#{project.descendants.active.collect{|p| p.id}.join(',')})
-                                              group by s.id, s.is_closed, i.project_id") if project.descendants.active.any?
+                                                #{Issue.table_name}.status_id=s.id
+                                                and #{Issue.table_name}.project_id = #{Project.table_name}.id
+                                                and #{visible_condition(User.current, :project => project, :with_subprojects => true)}
+                                                and #{Issue.table_name}.project_id <> #{project.id}
+                                              group by s.id, s.is_closed, #{Issue.table_name}.project_id") if project.descendants.active.any?
   end
   # End ReportsController extraction
-  
+
   # Returns an array of projects that current user can move issues to
   def self.allowed_target_projects_on_move
     projects = []
     if User.current.admin?
       # admin is allowed to move issues to any active (visible) project

         User.current.memberships.each {|m| projects << m.project if m.roles.detect {|r| r.allowed_to?(:move_issues)}}
       end
     end
     projects
   end
-   
+
   private
-  
+
   def update_nested_set_attributes
     if root_id.nil?
       # issue was just created
       self.root_id = (@parent_issue.nil? ? id : @parent_issue.root_id)
       set_default_left_and_right

       # update former parent
       recalculate_attributes_for(former_parent_id) if former_parent_id
     end
     remove_instance_variable(:@parent_issue) if instance_variable_defined?(:@parent_issue)
   end
-  
+
   def update_parent_attributes
     recalculate_attributes_for(parent_id) if parent_id
   end
 
   def recalculate_attributes_for(issue_id)
     if issue_id && p = Issue.find_by_id(issue_id)
       # priority = highest priority of children
       if priority_position = p.children.maximum("#{IssuePriority.table_name}.position", :include => :priority)
         p.priority = IssuePriority.find_by_position(priority_position)
       end
-      
+
       # start/due dates = lowest/highest dates of children
       p.start_date = p.children.minimum(:start_date)
       p.due_date = p.children.maximum(:due_date)
       if p.start_date && p.due_date && p.due_date < p.start_date
         p.start_date, p.due_date = p.due_date, p.start_date
       end
-      
+
       # done ratio = weighted average ratio of leaves
       unless Issue.use_status_for_done_ratio? && p.status && p.status.default_done_ratio
         leaves_count = p.leaves.count
         if leaves_count > 0
           average = p.leaves.average(:estimated_hours).to_f

           done = p.leaves.sum("COALESCE(estimated_hours, #{average}) * (CASE WHEN is_closed = #{connection.quoted_true} THEN 100 ELSE COALESCE(done_ratio, 0) END)", :include => :status).to_f
           progress = done / (average * leaves_count)
           p.done_ratio = progress.round
         end
       end
-      
+
       # estimate = sum of leaves estimates
       p.estimated_hours = p.leaves.sum(:estimated_hours).to_f
       p.estimated_hours = nil if p.estimated_hours == 0.0
-      
+
       # ancestors will be recursively updated
       p.save(false)
     end
   end
-  
-  def destroy_children
-    unless leaf?
-      children.each do |child|
-        child.destroy
-      end
-    end
-  end
-  
+
   # Update issues so their versions are not pointing to a
   # fixed_version that is not shared with the issue's project
   def self.update_versions(conditions=nil)
     # Only need to update issues with a fixed_version from
     # a different project and that is not systemwide shared

         issue.fixed_version = nil
         issue.save
       end
     end
   end
-  
+
   # Callback on attachment deletion
   def attachment_removed(obj)
     journal = init_journal(User.current)
     journal.details << JournalDetail.new(:property => 'attachment',
                                          :prop_key => obj.id,
                                          :old_value => obj.filename)
     journal.save
   end
-  
+
   # Default assignment based on category
   def default_assign
     if assigned_to.nil? && category && category.assigned_to
       self.assigned_to = category.assigned_to
     end

         end
         duplicate.update_attribute :status, self.status
       end
     end
   end
-  
+
   # Saves the changes in a Journal
   # Called after_save
   def create_journal
     if @current_journal
       # attributes changes
-      (Issue.column_names - %w(id description root_id lft rgt lock_version created_on updated_on)).each {|c|
+      (Issue.column_names - %w(id root_id lft rgt lock_version created_on updated_on)).each {|c|
+        before = @issue_before_change.send(c)
+        after = send(c)
+        next if before == after || (before.blank? && after.blank?)
         @current_journal.details << JournalDetail.new(:property => 'attr',
                                                       :prop_key => c,
                                                       :old_value => @issue_before_change.send(c),
-                                                      :value => send(c)) unless send(c)==@issue_before_change.send(c)
+                                                      :value => send(c))
       }
       # custom fields changes
       custom_values.each {|c|
         next if (@custom_values_before_change[c.custom_field_id]==c.value ||
                   (@custom_values_before_change[c.custom_field_id].blank? && c.value.blank?))
-        @current_journal.details << JournalDetail.new(:property => 'cf', 
+        @current_journal.details << JournalDetail.new(:property => 'cf',
                                                       :prop_key => c.custom_field_id,
                                                       :old_value => @custom_values_before_change[c.custom_field_id],
                                                       :value => c.value)
-      }      
+      }
       @current_journal.save
       # reset current journal
       init_journal @current_journal.user, @current_journal.notes
     end
   end

   def self.count_and_group_by(options)
     project = options.delete(:project)
     select_field = options.delete(:field)
     joins = options.delete(:joins)
 
-    where = "i.#{select_field}=j.id"
-    
+    where = "#{Issue.table_name}.#{select_field}=j.id"
+
     ActiveRecord::Base.connection.select_all("select    s.id as status_id, 
                                                 s.is_closed as closed, 
                                                 j.id as #{select_field},
-                                                count(i.id) as total 
+                                                count(#{Issue.table_name}.id) as total 
                                               from 
-                                                  #{Issue.table_name} i, #{IssueStatus.table_name} s, #{joins} j
+                                                  #{Issue.table_name}, #{Project.table_name}, #{IssueStatus.table_name} s, #{joins} j
                                               where 
-                                                i.status_id=s.id 
+                                                #{Issue.table_name}.status_id=s.id 
                                                 and #{where}
-                                                and i.project_id=#{project.id}
+                                                and #{Issue.table_name}.project_id=#{Project.table_name}.id
+                                                and #{visible_condition(User.current, :project => project)}
                                               group by s.id, s.is_closed, j.id")
   end
-  
-
 end