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openproject/app/models/cost_query/sql_statement.rb

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#-- copyright
# OpenProject Reporting Plugin
#
# Copyright (C) 2010 - 2014 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 3.
#
# 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 CostQuery::SqlStatement < Report::SqlStatement
COMMON_FIELDS = %w[
user_id project_id work_package_id rate_id
comments spent_on created_on updated_on tyear tmonth tweek
costs overridden_costs type
]
# flag to mark a reporting query consisting of a union of cost and time entries
attr_accessor :entry_union
def initialize(table, desc = "")
super(table, desc)
@entry_union = false
end
# this is a hack to ensure that additional joins added by filters do not result
# in additional columns being selected.
def to_s
select(['entries.*']) if select == ['*'] && group_by.empty? && self.entry_union
super
end
##
# Generates SqlStatement that maps time_entries and cost_entries to a common structure.
#
# Mapping for direct fields:
#
# Result | Time Entires | Cost entries
# --------------------------|--------------------------|--------------------------
# id | id | id
# user_id | user_id | user_id
# project_id | project_id | project_id
# work_package_id | work_package_id | work_package_id
# rate_id | rate_id | rate_id
# comments | comments | comments
# spent_on | spent_on | spent_on
# created_on | created_on | created_on
# updated_on | updated_on | updated_on
# tyear | tyear | tyear
# tmonth | tmonth | tmonth
# tweek | tweek | tweek
# costs | costs | costs
# overridden_costs | overridden_costs | overridden_costs
# units | hours | units
# activity_id | activity_id | -1
# cost_type_id | -1 | cost_type_id
# type | "TimeEntry" | "CostEntry"
# count | 1 | 1
#
# Also: This _should_ handle joining activities and cost_types, as the logic differs for time_entries
# and cost_entries.
#
# @param [#table_name] model The model to map
# @return [CostQuery::SqlStatement] Generated statement
def self.unified_entry(model)
table = table_name_for model
new(table).tap do |query|
query.select COMMON_FIELDS
query.desc = "Subquery for #{table}"
query.select({
count: 1, id: [model, :id], display_costs: 1,
real_costs: switch("#{table}.overridden_costs IS NULL" => [model, :costs], else: [model, :overridden_costs]),
week: iso_year_week(:spent_on, model),
singleton_value: 1 })
#FIXME: build this subquery from a sql_statement
query.from "(SELECT *, #{typed :text, model.model_name.to_s} AS type FROM #{table}) AS #{table}"
send("unify_#{table}", query)
end
end
##
# Applies logic for mapping time entries to general entries structure.
#
# @param [CostQuery::SqlStatement] query The statement to adjust
def self.unify_time_entries(query)
query.select :activity_id, units: :hours, cost_type_id: -1
query.select cost_type: quoted_label(:caption_labor)
end
##
# Applies logic for mapping cost entries to general entries structure.
#
# @param [CostQuery::SqlStatement] query The statement to adjust
def self.unify_cost_entries(query)
query.select :units, :cost_type_id, activity_id: -1
query.select cost_type: "cost_types.name"
query.join CostType
end
##
# Generates a statement based on all entries (i.e. time entries and cost entries) mapped to the general entries structure,
# and therefore usable by filters and such.
#
# @return [CostQuery::SqlStatement] Generated statement
def self.for_entries
sql = new unified_entry(TimeEntry).union(unified_entry(CostEntry), "entries")
sql.entry_union = true
sql
end
end