diff .svn/pristine/51/51f64479905fa6ebe754a8ef36329d97b292d2ad.svn-base @ 909:cbb26bc654de redmine-1.3

Update to Redmine 1.3-stable branch (Redmine SVN rev 8964)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.svn/pristine/51/51f64479905fa6ebe754a8ef36329d97b292d2ad.svn-base	Fri Feb 24 19:09:32 2012 +0000
@@ -0,0 +1,793 @@
+# 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 QueryColumn
+  attr_accessor :name, :sortable, :groupable, :default_order
+  include Redmine::I18n
+
+  def initialize(name, options={})
+    self.name = name
+    self.sortable = options[:sortable]
+    self.groupable = options[:groupable] || false
+    if groupable == true
+      self.groupable = name.to_s
+    end
+    self.default_order = options[:default_order]
+    @caption_key = options[:caption] || "field_#{name}"
+  end
+
+  def caption
+    l(@caption_key)
+  end
+
+  # Returns true if the column is sortable, otherwise false
+  def sortable?
+    !@sortable.nil?
+  end
+  
+  def sortable
+    @sortable.is_a?(Proc) ? @sortable.call : @sortable
+  end
+
+  def value(issue)
+    issue.send name
+  end
+
+  def css_classes
+    name
+  end
+end
+
+class QueryCustomFieldColumn < QueryColumn
+
+  def initialize(custom_field)
+    self.name = "cf_#{custom_field.id}".to_sym
+    self.sortable = custom_field.order_statement || false
+    if %w(list date bool int).include?(custom_field.field_format)
+      self.groupable = custom_field.order_statement
+    end
+    self.groupable ||= false
+    @cf = custom_field
+  end
+
+  def caption
+    @cf.name
+  end
+
+  def custom_field
+    @cf
+  end
+
+  def value(issue)
+    cv = issue.custom_values.detect {|v| v.custom_field_id == @cf.id}
+    cv && @cf.cast_value(cv.value)
+  end
+
+  def css_classes
+    @css_classes ||= "#{name} #{@cf.field_format}"
+  end
+end
+
+class Query < ActiveRecord::Base
+  class StatementInvalid < ::ActiveRecord::StatementInvalid
+  end
+
+  belongs_to :project
+  belongs_to :user
+  serialize :filters
+  serialize :column_names
+  serialize :sort_criteria, Array
+
+  attr_protected :project_id, :user_id
+
+  validates_presence_of :name, :on => :save
+  validates_length_of :name, :maximum => 255
+  validate :validate_query_filters
+
+  @@operators = { "="   => :label_equals,
+                  "!"   => :label_not_equals,
+                  "o"   => :label_open_issues,
+                  "c"   => :label_closed_issues,
+                  "!*"  => :label_none,
+                  "*"   => :label_all,
+                  ">="  => :label_greater_or_equal,
+                  "<="  => :label_less_or_equal,
+                  "><"  => :label_between,
+                  "<t+" => :label_in_less_than,
+                  ">t+" => :label_in_more_than,
+                  "t+"  => :label_in,
+                  "t"   => :label_today,
+                  "w"   => :label_this_week,
+                  ">t-" => :label_less_than_ago,
+                  "<t-" => :label_more_than_ago,
+                  "t-"  => :label_ago,
+                  "~"   => :label_contains,
+                  "!~"  => :label_not_contains }
+
+  cattr_reader :operators
+
+  @@operators_by_filter_type = { :list => [ "=", "!" ],
+                                 :list_status => [ "o", "=", "!", "c", "*" ],
+                                 :list_optional => [ "=", "!", "!*", "*" ],
+                                 :list_subprojects => [ "*", "!*", "=" ],
+                                 :date => [ "=", ">=", "<=", "><", "<t+", ">t+", "t+", "t", "w", ">t-", "<t-", "t-", "!*", "*" ],
+                                 :date_past => [ "=", ">=", "<=", "><", ">t-", "<t-", "t-", "t", "w", "!*", "*" ],
+                                 :string => [ "=", "~", "!", "!~" ],
+                                 :text => [  "~", "!~" ],
+                                 :integer => [ "=", ">=", "<=", "><", "!*", "*" ],
+                                 :float => [ "=", ">=", "<=", "><", "!*", "*" ] }
+
+  cattr_reader :operators_by_filter_type
+
+  @@available_columns = [
+    QueryColumn.new(:project, :sortable => "#{Project.table_name}.name", :groupable => true),
+    QueryColumn.new(:tracker, :sortable => "#{Tracker.table_name}.position", :groupable => true),
+    QueryColumn.new(:parent, :sortable => ["#{Issue.table_name}.root_id", "#{Issue.table_name}.lft ASC"], :default_order => 'desc', :caption => :field_parent_issue),
+    QueryColumn.new(:status, :sortable => "#{IssueStatus.table_name}.position", :groupable => true),
+    QueryColumn.new(:priority, :sortable => "#{IssuePriority.table_name}.position", :default_order => 'desc', :groupable => true),
+    QueryColumn.new(:subject, :sortable => "#{Issue.table_name}.subject"),
+    QueryColumn.new(:author, :sortable => lambda {User.fields_for_order_statement("authors")}, :groupable => true),
+    QueryColumn.new(:assigned_to, :sortable => lambda {User.fields_for_order_statement}, :groupable => true),
+    QueryColumn.new(:updated_on, :sortable => "#{Issue.table_name}.updated_on", :default_order => 'desc'),
+    QueryColumn.new(:category, :sortable => "#{IssueCategory.table_name}.name", :groupable => true),
+    QueryColumn.new(:fixed_version, :sortable => ["#{Version.table_name}.effective_date", "#{Version.table_name}.name"], :default_order => 'desc', :groupable => true),
+    QueryColumn.new(:start_date, :sortable => "#{Issue.table_name}.start_date"),
+    QueryColumn.new(:due_date, :sortable => "#{Issue.table_name}.due_date"),
+    QueryColumn.new(:estimated_hours, :sortable => "#{Issue.table_name}.estimated_hours"),
+    QueryColumn.new(:done_ratio, :sortable => "#{Issue.table_name}.done_ratio", :groupable => true),
+    QueryColumn.new(:created_on, :sortable => "#{Issue.table_name}.created_on", :default_order => 'desc'),
+  ]
+  cattr_reader :available_columns
+
+  named_scope :visible, lambda {|*args|
+    user = args.shift || User.current
+    base = Project.allowed_to_condition(user, :view_issues, *args)
+    user_id = user.logged? ? user.id : 0
+    {
+      :conditions => ["(#{table_name}.project_id IS NULL OR (#{base})) AND (#{table_name}.is_public = ? OR #{table_name}.user_id = ?)", true, user_id],
+      :include => :project
+    }
+  }
+
+  def initialize(attributes = nil)
+    super attributes
+    self.filters ||= { 'status_id' => {:operator => "o", :values => [""]} }
+  end
+
+  def after_initialize
+    # Store the fact that project is nil (used in #editable_by?)
+    @is_for_all = project.nil?
+  end
+
+  def validate_query_filters
+    filters.each_key do |field|
+      if values_for(field)
+        case type_for(field)
+        when :integer
+          errors.add(label_for(field), :invalid) if values_for(field).detect {|v| v.present? && !v.match(/^\d+$/) }
+        when :float
+          errors.add(label_for(field), :invalid) if values_for(field).detect {|v| v.present? && !v.match(/^\d+(\.\d*)?$/) }
+        when :date, :date_past
+          case operator_for(field)
+          when "=", ">=", "<=", "><"
+            errors.add(label_for(field), :invalid) if values_for(field).detect {|v| v.present? && (!v.match(/^\d{4}-\d{2}-\d{2}$/) || (Date.parse(v) rescue nil).nil?) }
+          when ">t-", "<t-", "t-"
+            errors.add(label_for(field), :invalid) if values_for(field).detect {|v| v.present? && !v.match(/^\d+$/) }
+          end
+        end
+      end
+
+      errors.add label_for(field), :blank unless
+          # filter requires one or more values
+          (values_for(field) and !values_for(field).first.blank?) or
+          # filter doesn't require any value
+          ["o", "c", "!*", "*", "t", "w"].include? operator_for(field)
+    end if filters
+  end
+
+  # Returns true if the query is visible to +user+ or the current user.
+  def visible?(user=User.current)
+    (project.nil? || user.allowed_to?(:view_issues, project)) && (self.is_public? || self.user_id == user.id)
+  end
+
+  def editable_by?(user)
+    return false unless user
+    # Admin can edit them all and regular users can edit their private queries
+    return true if user.admin? || (!is_public && self.user_id == user.id)
+    # Members can not edit public queries that are for all project (only admin is allowed to)
+    is_public && !@is_for_all && user.allowed_to?(:manage_public_queries, project)
+  end
+
+  def available_filters
+    return @available_filters if @available_filters
+
+    trackers = project.nil? ? Tracker.find(:all, :order => 'position') : project.rolled_up_trackers
+
+    @available_filters = { "status_id" => { :type => :list_status, :order => 1, :values => IssueStatus.find(:all, :order => 'position').collect{|s| [s.name, s.id.to_s] } },
+                           "tracker_id" => { :type => :list, :order => 2, :values => trackers.collect{|s| [s.name, s.id.to_s] } },
+                           "priority_id" => { :type => :list, :order => 3, :values => IssuePriority.all.collect{|s| [s.name, s.id.to_s] } },
+                           "subject" => { :type => :text, :order => 8 },
+                           "created_on" => { :type => :date_past, :order => 9 },
+                           "updated_on" => { :type => :date_past, :order => 10 },
+                           "start_date" => { :type => :date, :order => 11 },
+                           "due_date" => { :type => :date, :order => 12 },
+                           "estimated_hours" => { :type => :float, :order => 13 },
+                           "done_ratio" =>  { :type => :integer, :order => 14 }}
+
+    principals = []
+    if project
+      principals += project.principals.sort
+    else
+      all_projects = Project.visible.all
+      if all_projects.any?
+        # members of visible projects
+        principals += Principal.active.find(:all, :conditions => ["#{User.table_name}.id IN (SELECT DISTINCT user_id FROM members WHERE project_id IN (?))", all_projects.collect(&:id)]).sort
+
+        # project filter
+        project_values = []
+        Project.project_tree(all_projects) do |p, level|
+          prefix = (level > 0 ? ('--' * level + ' ') : '')
+          project_values << ["#{prefix}#{p.name}", p.id.to_s]
+        end
+        @available_filters["project_id"] = { :type => :list, :order => 1, :values => project_values} unless project_values.empty?
+      end
+    end
+    users = principals.select {|p| p.is_a?(User)}
+
+    assigned_to_values = []
+    assigned_to_values << ["<< #{l(:label_me)} >>", "me"] if User.current.logged?
+    assigned_to_values += (Setting.issue_group_assignment? ? principals : users).collect{|s| [s.name, s.id.to_s] }
+    @available_filters["assigned_to_id"] = { :type => :list_optional, :order => 4, :values => assigned_to_values } unless assigned_to_values.empty?
+
+    author_values = []
+    author_values << ["<< #{l(:label_me)} >>", "me"] if User.current.logged?
+    author_values += users.collect{|s| [s.name, s.id.to_s] }
+    @available_filters["author_id"] = { :type => :list, :order => 5, :values => author_values } unless author_values.empty?
+
+    group_values = Group.all.collect {|g| [g.name, g.id.to_s] }
+    @available_filters["member_of_group"] = { :type => :list_optional, :order => 6, :values => group_values } unless group_values.empty?
+
+    role_values = Role.givable.collect {|r| [r.name, r.id.to_s] }
+    @available_filters["assigned_to_role"] = { :type => :list_optional, :order => 7, :values => role_values } unless role_values.empty?
+
+    if User.current.logged?
+      @available_filters["watcher_id"] = { :type => :list, :order => 15, :values => [["<< #{l(:label_me)} >>", "me"]] }
+    end
+
+    if project
+      # project specific filters
+      categories = project.issue_categories.all
+      unless categories.empty?
+        @available_filters["category_id"] = { :type => :list_optional, :order => 6, :values => categories.collect{|s| [s.name, s.id.to_s] } }
+      end
+      versions = project.shared_versions.all
+      unless versions.empty?
+        @available_filters["fixed_version_id"] = { :type => :list_optional, :order => 7, :values => versions.sort.collect{|s| ["#{s.project.name} - #{s.name}", s.id.to_s] } }
+      end
+      unless project.leaf?
+        subprojects = project.descendants.visible.all
+        unless subprojects.empty?
+          @available_filters["subproject_id"] = { :type => :list_subprojects, :order => 13, :values => subprojects.collect{|s| [s.name, s.id.to_s] } }
+        end
+      end
+      add_custom_fields_filters(project.all_issue_custom_fields)
+    else
+      # global filters for cross project issue list
+      system_shared_versions = Version.visible.find_all_by_sharing('system')
+      unless system_shared_versions.empty?
+        @available_filters["fixed_version_id"] = { :type => :list_optional, :order => 7, :values => system_shared_versions.sort.collect{|s| ["#{s.project.name} - #{s.name}", s.id.to_s] } }
+      end
+      add_custom_fields_filters(IssueCustomField.find(:all, :conditions => {:is_filter => true, :is_for_all => true}))
+    end
+    @available_filters
+  end
+
+  def add_filter(field, operator, values)
+    # values must be an array
+    return unless values.nil? || values.is_a?(Array)
+    # check if field is defined as an available filter
+    if available_filters.has_key? field
+      filter_options = available_filters[field]
+      # check if operator is allowed for that filter
+      #if @@operators_by_filter_type[filter_options[:type]].include? operator
+      #  allowed_values = values & ([""] + (filter_options[:values] || []).collect {|val| val[1]})
+      #  filters[field] = {:operator => operator, :values => allowed_values } if (allowed_values.first and !allowed_values.first.empty?) or ["o", "c", "!*", "*", "t"].include? operator
+      #end
+      filters[field] = {:operator => operator, :values => (values || [''])}
+    end
+  end
+
+  def add_short_filter(field, expression)
+    return unless expression && available_filters.has_key?(field)
+    field_type = available_filters[field][:type]
+    @@operators_by_filter_type[field_type].sort.reverse.detect do |operator|
+      next unless expression =~ /^#{Regexp.escape(operator)}(.*)$/
+      add_filter field, operator, $1.present? ? $1.split('|') : ['']
+    end || add_filter(field, '=', expression.split('|'))
+  end
+
+  # Add multiple filters using +add_filter+
+  def add_filters(fields, operators, values)
+    if fields.is_a?(Array) && operators.is_a?(Hash) && (values.nil? || values.is_a?(Hash))
+      fields.each do |field|
+        add_filter(field, operators[field], values && values[field])
+      end
+    end
+  end
+
+  def has_filter?(field)
+    filters and filters[field]
+  end
+
+  def type_for(field)
+    available_filters[field][:type] if available_filters.has_key?(field)
+  end
+
+  def operator_for(field)
+    has_filter?(field) ? filters[field][:operator] : nil
+  end
+
+  def values_for(field)
+    has_filter?(field) ? filters[field][:values] : nil
+  end
+
+  def value_for(field, index=0)
+    (values_for(field) || [])[index]
+  end
+
+  def label_for(field)
+    label = available_filters[field][:name] if available_filters.has_key?(field)
+    label ||= field.gsub(/\_id$/, "")
+  end
+
+  def available_columns
+    return @available_columns if @available_columns
+    @available_columns = ::Query.available_columns
+    @available_columns += (project ?
+                            project.all_issue_custom_fields :
+                            IssueCustomField.find(:all)
+                           ).collect {|cf| QueryCustomFieldColumn.new(cf) }
+  end
+
+  def self.available_columns=(v)
+    self.available_columns = (v)
+  end
+
+  def self.add_available_column(column)
+    self.available_columns << (column) if column.is_a?(QueryColumn)
+  end
+
+  # Returns an array of columns that can be used to group the results
+  def groupable_columns
+    available_columns.select {|c| c.groupable}
+  end
+
+  # Returns a Hash of columns and the key for sorting
+  def sortable_columns
+    {'id' => "#{Issue.table_name}.id"}.merge(available_columns.inject({}) {|h, column|
+                                               h[column.name.to_s] = column.sortable
+                                               h
+                                             })
+  end
+
+  def columns
+    # preserve the column_names order
+    (has_default_columns? ? default_columns_names : column_names).collect do |name|
+       available_columns.find { |col| col.name == name }
+    end.compact
+  end
+
+  def default_columns_names
+    @default_columns_names ||= begin
+      default_columns = Setting.issue_list_default_columns.map(&:to_sym)
+
+      project.present? ? default_columns : [:project] | default_columns
+    end
+  end
+
+  def column_names=(names)
+    if names
+      names = names.select {|n| n.is_a?(Symbol) || !n.blank? }
+      names = names.collect {|n| n.is_a?(Symbol) ? n : n.to_sym }
+      # Set column_names to nil if default columns
+      if names == default_columns_names
+        names = nil
+      end
+    end
+    write_attribute(:column_names, names)
+  end
+
+  def has_column?(column)
+    column_names && column_names.include?(column.name)
+  end
+
+  def has_default_columns?
+    column_names.nil? || column_names.empty?
+  end
+
+  def sort_criteria=(arg)
+    c = []
+    if arg.is_a?(Hash)
+      arg = arg.keys.sort.collect {|k| arg[k]}
+    end
+    c = arg.select {|k,o| !k.to_s.blank?}.slice(0,3).collect {|k,o| [k.to_s, o == 'desc' ? o : 'asc']}
+    write_attribute(:sort_criteria, c)
+  end
+
+  def sort_criteria
+    read_attribute(:sort_criteria) || []
+  end
+
+  def sort_criteria_key(arg)
+    sort_criteria && sort_criteria[arg] && sort_criteria[arg].first
+  end
+
+  def sort_criteria_order(arg)
+    sort_criteria && sort_criteria[arg] && sort_criteria[arg].last
+  end
+
+  # Returns the SQL sort order that should be prepended for grouping
+  def group_by_sort_order
+    if grouped? && (column = group_by_column)
+      column.sortable.is_a?(Array) ?
+        column.sortable.collect {|s| "#{s} #{column.default_order}"}.join(',') :
+        "#{column.sortable} #{column.default_order}"
+    end
+  end
+
+  # Returns true if the query is a grouped query
+  def grouped?
+    !group_by_column.nil?
+  end
+
+  def group_by_column
+    groupable_columns.detect {|c| c.groupable && c.name.to_s == group_by}
+  end
+
+  def group_by_statement
+    group_by_column.try(:groupable)
+  end
+
+  def project_statement
+    project_clauses = []
+    if project && !project.descendants.active.empty?
+      ids = [project.id]
+      if has_filter?("subproject_id")
+        case operator_for("subproject_id")
+        when '='
+          # include the selected subprojects
+          ids += values_for("subproject_id").each(&:to_i)
+        when '!*'
+          # main project only
+        else
+          # all subprojects
+          ids += project.descendants.collect(&:id)
+        end
+      elsif Setting.display_subprojects_issues?
+        ids += project.descendants.collect(&:id)
+      end
+      project_clauses << "#{Project.table_name}.id IN (%s)" % ids.join(',')
+    elsif project
+      project_clauses << "#{Project.table_name}.id = %d" % project.id
+    end
+    project_clauses.any? ? project_clauses.join(' AND ') : nil
+  end
+
+  def statement
+    # filters clauses
+    filters_clauses = []
+    filters.each_key do |field|
+      next if field == "subproject_id"
+      v = values_for(field).clone
+      next unless v and !v.empty?
+      operator = operator_for(field)
+
+      # "me" value subsitution
+      if %w(assigned_to_id author_id watcher_id).include?(field)
+        if v.delete("me")
+          if User.current.logged?
+            v.push(User.current.id.to_s)
+            v += User.current.group_ids.map(&:to_s) if field == 'assigned_to_id'
+          else
+            v.push("0")
+          end
+        end
+      end
+
+      if field =~ /^cf_(\d+)$/
+        # custom field
+        filters_clauses << sql_for_custom_field(field, operator, v, $1)
+      elsif respond_to?("sql_for_#{field}_field")
+        # specific statement
+        filters_clauses << send("sql_for_#{field}_field", field, operator, v)
+      else
+        # regular field
+        filters_clauses << '(' + sql_for_field(field, operator, v, Issue.table_name, field) + ')'
+      end
+    end if filters and valid?
+
+    filters_clauses << project_statement
+    filters_clauses.reject!(&:blank?)
+
+    filters_clauses.any? ? filters_clauses.join(' AND ') : nil
+  end
+
+  # Returns the issue count
+  def issue_count
+    Issue.visible.count(:include => [:status, :project], :conditions => statement)
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+
+  # Returns the issue count by group or nil if query is not grouped
+  def issue_count_by_group
+    r = nil
+    if grouped?
+      begin
+        # Rails will raise an (unexpected) RecordNotFound if there's only a nil group value
+        r = Issue.visible.count(:group => group_by_statement, :include => [:status, :project], :conditions => statement)
+      rescue ActiveRecord::RecordNotFound
+        r = {nil => issue_count}
+      end
+      c = group_by_column
+      if c.is_a?(QueryCustomFieldColumn)
+        r = r.keys.inject({}) {|h, k| h[c.custom_field.cast_value(k)] = r[k]; h}
+      end
+    end
+    r
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+
+  # Returns the issues
+  # Valid options are :order, :offset, :limit, :include, :conditions
+  def issues(options={})
+    order_option = [group_by_sort_order, options[:order]].reject {|s| s.blank?}.join(',')
+    order_option = nil if order_option.blank?
+    
+    joins = (order_option && order_option.include?('authors')) ? "LEFT OUTER JOIN users authors ON authors.id = #{Issue.table_name}.author_id" : nil
+
+    Issue.visible.scoped(:conditions => options[:conditions]).find :all, :include => ([:status, :project] + (options[:include] || [])).uniq,
+                     :conditions => statement,
+                     :order => order_option,
+                     :joins => joins,
+                     :limit  => options[:limit],
+                     :offset => options[:offset]
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+
+  # Returns the journals
+  # Valid options are :order, :offset, :limit
+  def journals(options={})
+    Journal.visible.find :all, :include => [:details, :user, {:issue => [:project, :author, :tracker, :status]}],
+                       :conditions => statement,
+                       :order => options[:order],
+                       :limit => options[:limit],
+                       :offset => options[:offset]
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+
+  # Returns the versions
+  # Valid options are :conditions
+  def versions(options={})
+    Version.visible.scoped(:conditions => options[:conditions]).find :all, :include => :project, :conditions => project_statement
+  rescue ::ActiveRecord::StatementInvalid => e
+    raise StatementInvalid.new(e.message)
+  end
+
+  def sql_for_watcher_id_field(field, operator, value)
+    db_table = Watcher.table_name
+    "#{Issue.table_name}.id #{ operator == '=' ? 'IN' : 'NOT IN' } (SELECT #{db_table}.watchable_id FROM #{db_table} WHERE #{db_table}.watchable_type='Issue' AND " +
+      sql_for_field(field, '=', value, db_table, 'user_id') + ')'
+  end
+
+  def sql_for_member_of_group_field(field, operator, value)
+    if operator == '*' # Any group
+      groups = Group.all
+      operator = '=' # Override the operator since we want to find by assigned_to
+    elsif operator == "!*"
+      groups = Group.all
+      operator = '!' # Override the operator since we want to find by assigned_to
+    else
+      groups = Group.find_all_by_id(value)
+    end
+    groups ||= []
+
+    members_of_groups = groups.inject([]) {|user_ids, group|
+      if group && group.user_ids.present?
+        user_ids << group.user_ids
+      end
+      user_ids.flatten.uniq.compact
+    }.sort.collect(&:to_s)
+
+    '(' + sql_for_field("assigned_to_id", operator, members_of_groups, Issue.table_name, "assigned_to_id", false) + ')'
+  end
+
+  def sql_for_assigned_to_role_field(field, operator, value)
+    case operator
+    when "*", "!*" # Member / Not member
+      sw = operator == "!*" ? 'NOT' : ''
+      nl = operator == "!*" ? "#{Issue.table_name}.assigned_to_id IS NULL OR" : ''
+      "(#{nl} #{Issue.table_name}.assigned_to_id #{sw} IN (SELECT DISTINCT #{Member.table_name}.user_id FROM #{Member.table_name}" +
+        " WHERE #{Member.table_name}.project_id = #{Issue.table_name}.project_id))"
+    when "=", "!"
+      role_cond = value.any? ? 
+        "#{MemberRole.table_name}.role_id IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + ")" :
+        "1=0"
+      
+      sw = operator == "!" ? 'NOT' : ''
+      nl = operator == "!" ? "#{Issue.table_name}.assigned_to_id IS NULL OR" : ''
+      "(#{nl} #{Issue.table_name}.assigned_to_id #{sw} IN (SELECT DISTINCT #{Member.table_name}.user_id FROM #{Member.table_name}, #{MemberRole.table_name}" +
+        " WHERE #{Member.table_name}.project_id = #{Issue.table_name}.project_id AND #{Member.table_name}.id = #{MemberRole.table_name}.member_id AND #{role_cond}))"
+    end
+  end
+
+  private
+
+  def sql_for_custom_field(field, operator, value, custom_field_id)
+    db_table = CustomValue.table_name
+    db_field = 'value'
+    "#{Issue.table_name}.id IN (SELECT #{Issue.table_name}.id FROM #{Issue.table_name} LEFT OUTER JOIN #{db_table} ON #{db_table}.customized_type='Issue' AND #{db_table}.customized_id=#{Issue.table_name}.id AND #{db_table}.custom_field_id=#{custom_field_id} WHERE " +
+      sql_for_field(field, operator, value, db_table, db_field, true) + ')'
+  end
+
+  # Helper method to generate the WHERE sql for a +field+, +operator+ and a +value+
+  def sql_for_field(field, operator, value, db_table, db_field, is_custom_filter=false)
+    sql = ''
+    case operator
+    when "="
+      if value.any?
+        case type_for(field)
+        when :date, :date_past
+          sql = date_clause(db_table, db_field, (Date.parse(value.first) rescue nil), (Date.parse(value.first) rescue nil))
+        when :integer
+          sql = "#{db_table}.#{db_field} = #{value.first.to_i}"
+        when :float
+          sql = "#{db_table}.#{db_field} BETWEEN #{value.first.to_f - 1e-5} AND #{value.first.to_f + 1e-5}"
+        else
+          sql = "#{db_table}.#{db_field} IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + ")"
+        end
+      else
+        # IN an empty set
+        sql = "1=0"
+      end
+    when "!"
+      if value.any?
+        sql = "(#{db_table}.#{db_field} IS NULL OR #{db_table}.#{db_field} NOT IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + "))"
+      else
+        # NOT IN an empty set
+        sql = "1=1"
+      end
+    when "!*"
+      sql = "#{db_table}.#{db_field} IS NULL"
+      sql << " OR #{db_table}.#{db_field} = ''" if is_custom_filter
+    when "*"
+      sql = "#{db_table}.#{db_field} IS NOT NULL"
+      sql << " AND #{db_table}.#{db_field} <> ''" if is_custom_filter
+    when ">="
+      if [:date, :date_past].include?(type_for(field))
+        sql = date_clause(db_table, db_field, (Date.parse(value.first) rescue nil), nil)
+      else
+        if is_custom_filter
+          sql = "CAST(#{db_table}.#{db_field} AS decimal(60,3)) >= #{value.first.to_f}"
+        else
+          sql = "#{db_table}.#{db_field} >= #{value.first.to_f}"
+        end
+      end
+    when "<="
+      if [:date, :date_past].include?(type_for(field))
+        sql = date_clause(db_table, db_field, nil, (Date.parse(value.first) rescue nil))
+      else
+        if is_custom_filter
+          sql = "CAST(#{db_table}.#{db_field} AS decimal(60,3)) <= #{value.first.to_f}"
+        else
+          sql = "#{db_table}.#{db_field} <= #{value.first.to_f}"
+        end
+      end
+    when "><"
+      if [:date, :date_past].include?(type_for(field))
+        sql = date_clause(db_table, db_field, (Date.parse(value[0]) rescue nil), (Date.parse(value[1]) rescue nil))
+      else
+        if is_custom_filter
+          sql = "CAST(#{db_table}.#{db_field} AS decimal(60,3)) BETWEEN #{value[0].to_f} AND #{value[1].to_f}"
+        else
+          sql = "#{db_table}.#{db_field} BETWEEN #{value[0].to_f} AND #{value[1].to_f}"
+        end
+      end
+    when "o"
+      sql = "#{IssueStatus.table_name}.is_closed=#{connection.quoted_false}" if field == "status_id"
+    when "c"
+      sql = "#{IssueStatus.table_name}.is_closed=#{connection.quoted_true}" if field == "status_id"
+    when ">t-"
+      sql = relative_date_clause(db_table, db_field, - value.first.to_i, 0)
+    when "<t-"
+      sql = relative_date_clause(db_table, db_field, nil, - value.first.to_i)
+    when "t-"
+      sql = relative_date_clause(db_table, db_field, - value.first.to_i, - value.first.to_i)
+    when ">t+"
+      sql = relative_date_clause(db_table, db_field, value.first.to_i, nil)
+    when "<t+"
+      sql = relative_date_clause(db_table, db_field, 0, value.first.to_i)
+    when "t+"
+      sql = relative_date_clause(db_table, db_field, value.first.to_i, value.first.to_i)
+    when "t"
+      sql = relative_date_clause(db_table, db_field, 0, 0)
+    when "w"
+      first_day_of_week = l(:general_first_day_of_week).to_i
+      day_of_week = Date.today.cwday
+      days_ago = (day_of_week >= first_day_of_week ? day_of_week - first_day_of_week : day_of_week + 7 - first_day_of_week)
+      sql = relative_date_clause(db_table, db_field, - days_ago, - days_ago + 6)
+    when "~"
+      sql = "LOWER(#{db_table}.#{db_field}) LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
+    when "!~"
+      sql = "LOWER(#{db_table}.#{db_field}) NOT LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
+    else
+      raise "Unknown query operator #{operator}"
+    end
+
+    return sql
+  end
+
+  def add_custom_fields_filters(custom_fields)
+    @available_filters ||= {}
+
+    custom_fields.select(&:is_filter?).each do |field|
+      case field.field_format
+      when "text"
+        options = { :type => :text, :order => 20 }
+      when "list"
+        options = { :type => :list_optional, :values => field.possible_values, :order => 20}
+      when "date"
+        options = { :type => :date, :order => 20 }
+      when "bool"
+        options = { :type => :list, :values => [[l(:general_text_yes), "1"], [l(:general_text_no), "0"]], :order => 20 }
+      when "int"
+        options = { :type => :integer, :order => 20 }
+      when "float"
+        options = { :type => :float, :order => 20 }
+      when "user", "version"
+        next unless project
+        options = { :type => :list_optional, :values => field.possible_values_options(project), :order => 20}
+      else
+        options = { :type => :string, :order => 20 }
+      end
+      @available_filters["cf_#{field.id}"] = options.merge({ :name => field.name })
+    end
+  end
+
+  # Returns a SQL clause for a date or datetime field.
+  def date_clause(table, field, from, to)
+    s = []
+    if from
+      from_yesterday = from - 1
+      from_yesterday_utc = Time.gm(from_yesterday.year, from_yesterday.month, from_yesterday.day)
+      s << ("#{table}.#{field} > '%s'" % [connection.quoted_date(from_yesterday_utc.end_of_day)])
+    end
+    if to
+      to_utc = Time.gm(to.year, to.month, to.day)
+      s << ("#{table}.#{field} <= '%s'" % [connection.quoted_date(to_utc.end_of_day)])
+    end
+    s.join(' AND ')
+  end
+
+  # Returns a SQL clause for a date or datetime field using relative dates.
+  def relative_date_clause(table, field, days_from, days_to)
+    date_clause(table, field, (days_from ? Date.today + days_from : nil), (days_to ? Date.today + days_to : nil))
+  end
+end