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VERSION 0.0.4.3

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This commit is contained in:
Denis Knauf 2011-10-27 15:28:34 +02:00
parent 5c68b74ee4 3b60648ee7
commit 8eebb3ac1f
6 changed files with 327 additions and 93 deletions
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1
.gitignore vendored
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@ -1,2 +1,3 @@
pkg/**
.*.swp
smql.gemspec

1
Rakefile
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@ -15,6 +15,7 @@ begin
gem.add_dependency 'activerecord'
gem.add_dependency 'activesupport'
gem.add_dependency 'json'
gem.add_dependency 'methodphitamine'
end
Jeweler::GemcutterTasks.new
rescue LoadError

2
VERSION
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@ -1 +1 @@
0.0.2
0.0.4.3

70
lib/smql_to_ar.rb
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@ -15,6 +15,18 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
class SmqlToAR
module Assertion
def raise_unless cond, exception = nil, *args
cond, exception, *args = yield. cond, exception, *args if block_given?
raise exception || Exception, *args unless cond
end
def raise_if cond, exception = nil, *args
cond, exception, *args = yield. cond, exception, *args if block_given?
raise exception || Exception, *args if cond
end
end
include ActiveSupport::Benchmarkable
############################################################################r
# Exceptions
@ -77,19 +89,27 @@ class SmqlToAR
end
end
class OnlyOrderOnBaseError < SMQLError
class RootOnlyFunctionError < SMQLError
def initialize path
super :path => path
end
end
class ConColumnError < SMQLError
def initialize expected, got
super :expected => expected, :got => got
end
end
class BuilderError < Exception; end
#############################################################################
# Model der Relation `rel` von `model`
def self.model_of model, rel
model.reflections[ rel.to_sym].andand.klass
rel = rel.to_sym
r = model.reflections[ rel].andand.klass
r.nil? && :self == rel ? model : r
end
# Eine Spalte in einer Tabelle, relativ zu `Column#model`.
@ -103,7 +123,7 @@ class SmqlToAR
def initialize model, *col
@model = model
@last_model = nil
*@path, @col = Array.wrap( col).collect {|s| s.to_s.split /[.\/]/ }.flatten.collect &:to_sym
*@path, @col = *Array.wrap( col).collect( &it.to_s.split( /[.\/]/)).flatten.collect( &:to_sym).reject( &it==:self)
end
def last_model
@ -113,9 +133,12 @@ class SmqlToAR
def each
model = @model
@path.each do |rel|
model = SmqlToAR.model_of model, rel
return false unless model
yield rel, model
rel = rel.to_sym
unless :self == rel
model = SmqlToAR.model_of model, rel
return false unless model
yield rel, model
end
end
model
end
@ -140,19 +163,23 @@ class SmqlToAR
def joins builder = nil, table = nil, &exe
pp = []
table = Array.wrap table
exe ||= builder ? lambda {|j, m| builder.join table+j, m} : Array.method( :[])
exe ||= builder ? lambda {|j, m| builder.joins table+j, m} : Array.method( :[])
collect do |rel, model|
pp.push rel
exe.call pp, model
end
end
def to_a() @path+[@col] end
def self?() !@col end
def length() @path.length+(self.self? ? 0 : 1) end
def size() @path.size+(self.self? ? 0 : 1) end
def to_a() @path+(self.self? ? [] : [@col]) end
def to_s() to_a.join '.' end
def to_sym() to_s.to_sym end
def to_json() to_s end
def inspect() "#<Column: #{model} #{to_s}>" end
def relation() SmqlToAR.model_of last_model, @col end
def relation() self.self? ? model : SmqlToAR.model_of( last_model, @col) end
def allowed?() ! self.protected? end
def child?() @path.empty? and !!relation end
end
attr_reader :model, :query, :conditions, :builder, :order
@ -179,6 +206,23 @@ class SmqlToAR
#p model: @model, query: @query
end
def self.models models
models = Array.wrap models
r = Hash.new {|h,k| h[k] = {} }
while model = models.tap( &:uniq!).pop
refls = model.respond_to?( :reflections) && model.reflections
refls && refls.each do |name, refl|
r[model.name][name] = case refl
when ActiveRecord::Reflection::ThroughReflection then {:macro => refl.macro, :model => refl.klass.name, :through => refl.through_reflection.name}
when ActiveRecord::Reflection::AssociationReflection then {:macro => refl.macro, :model => refl.klass.name}
else raise "Ups: #{refl.class}"
end
models.push refl.klass unless r.keys.include? refl.klass.name
end
end
r
end
def parse
#benchmark 'SMQL parse' do
@conditions = ConditionTypes.try_parse @model, @query
@ -214,4 +258,12 @@ class SmqlToAR
def self.to_ar *params
new( *params).to_ar
end
def self.reload_library
lib_dir = File.dirname __FILE__
fj = lambda {|*a| File.join lib_dir, *a }
load fj.call( 'smql_to_ar.rb')
load fj.call( 'smql_to_ar', 'condition_types.rb')
load fj.call( 'smql_to_ar', 'query_builder.rb')
end
end

183
lib/smql_to_ar/condition_types.rb
View file

@ -25,28 +25,44 @@ class SmqlToAR
# Nimmt eine Klasse ein Objekt an, so soll diese Klasse instanziert werden.
# Alles weitere siehe Condition.
module ConditionTypes
extend SmqlToAR::Assertion
class <<self
# Ex: 'givenname|surname|nick' => [:givenname, :surname, :nick]
def split_keys k
k.split( '|').collect &:to_sym
end
def conditions &e
unless block_given?
r = Enumerator.new( self, :conditions)
s = self
r.define_singleton_method :[] do |k|
s.conditions.select {|c| c::Operator === k }
end
return r
end
constants.each do |c|
next if :Condition == c
c = const_get c
next if Condition === c
yield c
end
end
# Eine Regel parsen.
# Ex: Person, "givenname=", "Peter"
def try_parse_it model, colop, val
r = nil
#p :try_parse => { :model => model, :colop => colop, :value => val }
constants.each do |c|
next if :Condition == c
c = const_get c
next if Condition === c
raise UnexpectedColOpError.new( model, colop, val) unless colop =~ /^(?:\d*:)?(.*?)(\W*)$/
conditions.each do |c|
raise_unless colop =~ /^(?:\d*:)?(.*?)(\W*)$/, UnexpectedColOpError.new( model, colop, val)
col, op = $1, $2
col = split_keys( col).collect {|c| Column.new model, c }
r = c.try_parse model, col, op, val
break if r
end
raise UnexpectedError.new( model, colop, val) unless r
raise_unless r, UnexpectedError.new( model, colop, val)
r
end
@ -72,16 +88,24 @@ class SmqlToAR
end
class Condition
include SmqlToAR::Assertion
extend SmqlToAR::Assertion
attr_reader :value, :cols
Operator = nil
Expected = []
Where = nil
# Versuche das Objekt zu erkennen. Operator und Expected muessen passen.
# Passt das Object, die Klasse instanzieren.
def self.try_parse model, cols, op, val
#p :self => name, :try_parse => op, :cols => cols, :with => self::Operator, :value => val, :expected => self::Expected, :model => model.name
new model, cols, val if self::Operator === op and self::Expected.any? {|i| i === val }
class <<self
# Versuche das Objekt zu erkennen. Operator und Expected muessen passen.
# Passt das Object, die Klasse instanzieren.
def try_parse model, cols, op, val
#p :self => name, :try_parse => op, :cols => cols, :with => self::Operator, :value => val, :expected => self::Expected, :model => model.name
new model, cols, val if self::Operator === op and self::Expected.any?( &it === val)
end
def inspect
"#{self.name}(:operator=>#{self::Operator.inspect}, :expected=>#{self::Expected.inspect}, :where=>#{self::Where.inspect})"
end
end
def initialize model, cols, val
@ -93,6 +117,10 @@ class SmqlToAR
verify
end
def inspect
"#<#{self.class.name}:0x#{(self.object_id<<1).to_s 16} model: #{self.class.name}, cols: #{@cols.inspect}, value: #{@value.inspect}>"
end
def verify
@cols.each do |col|
verify_column col
@ -103,19 +131,19 @@ class SmqlToAR
# Gibt es eine Spalte diesen Namens?
# Oder: Gibt es eine Relation diesen Namens? (Hier nicht der Fall)
def verify_column col
raise NonExistingColumnError.new( %w[Column], col) unless col.exist_in?
raise_unless col.exist_in?, NonExistingColumnError.new( %w[Column], col)
end
# Modelle koennen Spalten/Relationen verbieten mit Model#smql_protected.
# Dieses muss ein Object mit #include?( name_als_string) zurueckliefern,
# welches true fuer verboten und false fuer, erlaubt steht.
def verify_allowed col
raise ProtectedColumnError.new( col) if col.protected?
raise_if col.protected?, ProtectedColumnError.new( col)
end
# Erstelle alle noetigen Klauseln. builder nimmt diese entgegen,
# wobei builder.join, builder.select, builder.where und builder.wobs von interesse sind.
# mehrere Schluessel bedeuten, dass die Values _alle_ zutreffen muessen, wobei die Schluessel geodert werden.
# wobei builder.joins, builder.select, builder.where und builder.wobs von interesse sind.
# mehrere Schluessel bedeuten, dass die Values _alle_ zutreffen muessen, wobei die Schluessel geODERt werden.
# Ex:
# 1) {"givenname=", "Peter"} #=> givenname = 'Peter'
# 2) {"givenname=", ["Peter", "Hans"]} #=> ( givenname = 'Peter' OR givenname = 'Hans' )
@ -128,15 +156,16 @@ class SmqlToAR
@cols.each do |col|
col.joins builder, table
col = builder.column table+col.path, col.col
builder.where *values.keys.collect {|vid| self.class::Where % [ col, vid.to_s ] }
builder.where values.keys.collect {|vid| self.class::Where % [ col, vid.to_s ] }
end
else
b2 = SmqlToAR::And.new builder
values.keys.each do |vid|
builder.where *@cols.collect {|col|
b2.where SmqlToAR::Or[ *@cols.collect {|col|
col.joins builder, table
col = builder.column table+col.path, col.col
self.class::Where % [ col, vid.to_s ]
}
}]
end
end
self
@ -185,50 +214,94 @@ class SmqlToAR
In = simple_condition NotIn, '|=', '%s IN (%s)', [Array]
In2 = simple_condition In, '', nil, [Array]
NotEqual = simple_condition Condition, /\!=|<>/, "%s <> %s", [Array, String, Numeric]
NotEqual = simple_condition Condition, '!=', "%s <> %s", [Array, String, Numeric]
NotEqual2 = simple_condition Condition, '<>', "%s <> %s", [Array, String, Numeric]
GreaterThanOrEqual = simple_condition Condition, '>=', "%s >= %s", [Array, Numeric]
LesserThanOrEqual = simple_condition Condition, '<=', "%s <= %s", [Array, Numeric]
# Examples:
# { 'articles=>' => { id: 1 } }
# { 'articles=>' => [ { id: 1 }, { id: 2 } ] }
class EqualJoin <Condition
Operator = '='
Expected = [Hash]
Operator = '=>'
Expected = [Hash, lambda {|x| x.kind_of?( Array) and x.all?( &it.kind_of?( Hash))}]
def initialize *pars
super( *pars)
@value = Array.wrap @value
cols = {}
@cols.each do |col|
col_model = SmqlToAR.model_of col.last_model, col.col
#p col_model: col_model.to_s, value: @value
cols[col] = [col_model] + ConditionTypes.try_parse( col_model, @value)
col_model = col.relation
cols[col] = [col_model] + @value.collect {|val| ConditionTypes.try_parse( col_model, val) }
end
@cols = cols
end
def verify_column col
refl = SmqlToAR.model_of col.last_model, col.col
#p refl: refl, model: @model.name, col: col, :reflections => @model.reflections.keys
raise NonExistingRelationError.new( %w[Relation], col) unless refl
raise_unless col.relation, NonExistingRelationError.new( %w[Relation], col)
end
def build builder, table
@cols.each do |col, sub|
model, *sub = sub
t = table + col.path + [col.col]
#p sub: sub
#p col: col, joins: col.joins
col.joins.each {|j, m| builder.join table+j, m }
builder.join t, SmqlToAR.model_of( col.last_model, col.col)
sub[1..-1].each {|one| one.build builder, t }
col.joins.each {|j, m| builder.joins table+j, m }
builder.joins t, model
b2 = 1 == sub.length ? builder : Or.new( builder)
sub.each {|i| i.collect( &it.build( And.new( b2), t)); p 'or' => b2 }
end
self
end
end
# Takes to Queries.
# First Query will be a Subquery, second a regular query.
# Example:
# Person.smql 'sub.articles:' => [{'limit:' => 1, 'order:': 'updated_at desc'}, {'content~' => 'some text'}]
# Person must have as last Article (compared by updated_at) owned by Person a Artive which has 'some text' in content.
# The last Article needn't to have 'some text' has content, the subquery takes it anyway.
# But the second query compares to it and never to any other Article, because these are filtered by first query.
# The difference to
# Person.smql :articles => {'content~' => 'some text', 'limit:' => 1, 'order:': 'updated_at desc'}
# is, second is not allowed (limit and order must be in root) and this means something like
# "Person must have the Article owned by Person which has 'some text' in content.
# limit and order has no function in this query and this article needn't to be the last."
=begin
class SubEqualJoin < EqualJoin
Operator = '()'
Expected = [lambda {|x| x.kind_of?( Array) and (1..2).include?( x.length) and x.all?( &it.kind_of?( Hash))}]
def initialize model, cols, val
super model, cols, val[1]
# sub: model, subquery, sub(condition)
@cols.each {|col, sub| sub[ 1..-1] = SmqlToAR.new( col.relation, val[0]).parse, *sub[-1] }
end
def verify_column col
raise_unless col.child?, ConColumnError.new( [:Column], col)
end
def build builder, table
@cols.each do |col, sub|
t = table+col.to_a
builder.sub_joins t, col, *sub[0..1]
#ap sub: sub[2..-1]
sub[2..-1].each &it.build( builder, t)
end
self
end
end
=end
Equal = simple_condition Condition, '=', "%s = %s", [Array, String, Numeric]
Equal2 = simple_condition Equal, '', "%s = %s", [String, Numeric]
GreaterThan = simple_condition Condition, '>', "%s > %s", [Array, Numeric]
LesserThan = simple_condition Condition, '<', "%s < %s", [Array, Numeric]
NotIlike = simple_condition Condition, '!~', "%s NOT ILIKE %s", [Array, String]
Ilike = simple_condition Condition, '~', "%s ILIKE %s", [Array, String]
Exists = simple_condition Condition, '', '%s IS NOT NULL', [TrueClass]
NotExists = simple_condition Condition, '', '%s IS NULL', [FalseClass]
####### No Operator #######
Join = simple_condition EqualJoin, '', nil, [Hash]
InRange2 = simple_condition InRange, '', nil, [Range]
class Select < Condition
@ -236,7 +309,7 @@ class SmqlToAR
Expected = [nil]
def verify_column col
raise NonExistingSelectableError.new( col) unless col.exist_in? or SmqlToAR.model_of( col.last_model, col.col)
raise_unless col.exist_in? || SmqlToAR.model_of( col.last_model, col.col), NonExistingSelectableError.new( col)
end
def build builder, table
@ -258,13 +331,19 @@ class SmqlToAR
Expected = [String, Array, Hash, Numeric, nil]
class Function
include SmqlToAR::Assertion
Name = nil
Expected = []
attr_reader :model, :func, :args
def self.try_parse model, func, args
#SmqlToAR.logger.info( { try_parse: [func,args]}.inspect)
self.new model, func, args if self::Name === func and self::Expected.any? {|e| e === args }
class <<self
def try_parse model, func, args
self.new model, func, args if self::Name === func and self::Expected.any?( &it === args)
end
def inspect
"#{self.name}(:name=>#{self::Name}, :expected=>#{self::Expected})"
end
end
def initialize model, func, args
@ -277,22 +356,19 @@ class SmqlToAR
Expected = [String, Array, Hash, nil]
def initialize model, func, args
#SmqlToAR.logger.info( {args: args}.inspect)
args = case args
when String then [args]
when Array, Hash then args.to_a
when nil then nil
else raise 'Oops'
end
#SmqlToAR.logger.info( {args: args}.inspect)
args.andand.collect! do |o|
o = Array.wrap o
col = Column.new model, o.first
o = 'desc' == o.last.to_s.downcase ? :DESC : :ASC
raise NonExistingColumnError.new( [:Column], col) unless col.exist_in?
raise_unless col.exist_in?, NonExistingColumnError.new( [:Column], col)
[col, o]
end
#SmqlToAR.logger.info( {args: args}.inspect)
super model, func, args
end
@ -302,22 +378,39 @@ class SmqlToAR
col, o = o
col.joins builder, table
t = table + col.path
#raise OnlyOrderOnBaseError.new( t) unless 1 == t.length
#raise_unless 1 == t.length, RootOnlyFunctionError.new( t)
builder.order t, col.col, o
end
end
end
class Limit < Function
Name = :limit
Expected = [Fixnum]
def build builder, table
raise_unless 1 == table.length, RootOnlyFunctionError.new( table)
builder.limit = Array.wrap(@args).first.to_i
end
end
class Offset < Function
Name = :offset
Expected = [Fixnum]
def build builder, table
raise_unless 1 == table.length, RootOnlyFunctionError.new( table)
builder.offset = Array.wrap(@args).first.to_i
end
end
def self.new model, col, val
#SmqlToAR.logger.info( { function: col.first.to_sym }.inspect)
r = nil
constants.each do |c|
next if [:Function, :Where, :Expected, :Operator].include? c
c = const_get c
next if Function === c or not c.respond_to?( :try_parse)
#SmqlToAR.logger.info( {f: c}.inspect)
r = c.try_parse model, col.first.to_sym, val
#SmqlToAR.logger.info( {r: r}.inspect)
break if r
end
r

163
lib/smql_to_ar/query_builder.rb
View file

@ -22,36 +22,41 @@ class SmqlToAR
class Vid
attr_reader :vid
def initialize( vid) @vid = vid end
def to_s() ":c#{@vid}" end
def to_sym() "c#{@vid}".to_sym end
def to_s() ":smql_c#{@vid}" end
def to_sym() "smql_c#{@vid}".to_sym end
alias sym to_sym
def to_i() @vid end
end
attr_reader :table_alias, :model, :table_model, :base_table, :_where, :_select, :_wobs, :_joins
attr_accessor :logger
attr_reader :table_alias, :model, :table_model, :base_table, :_where, :_select, :_wobs, :_joins, :prefix, :_vid
attr_accessor :logger, :limit, :offset
def initialize model
def initialize model, prefix = nil
@prefix = "smql"
@logger = SmqlToAR.logger
@table_alias = Hash.new do |h, k|
k = Array.wrap k
h[k] = "smql,#{k.join(',')}"
j = Array.wrap( k).compact
h[k] = h.key?(j) ? h[j] : "#{@prefix},#{j.join(',')}"
end
@_vid, @_where, @_wobs, @model, @quoter = 0, [], {}, model, model.connection
@_vid, @_where, @_wobs, @model, @quoter = 0, SmqlToAR::And[], {}, model, model.connection
@base_table = [model.table_name.to_sym]
@table_alias[ @base_table] = @base_table.first
t = quote_table_name @table_alias[ @base_table]
@_select, @_joins, @_joined, @_includes, @_order = ["DISTINCT #{t}.*"], "", [], [], []
@_select, @_joins, @_joined, @_includes, @_order = ["DISTINCT #{t}.*"], "", [@base_table], [], []
@table_model = {@base_table => @model}
end
def vid() Vid.new( @_vid+=1) end
def inspect
"#<#{self.class.name}:#{"0x%x"% (self.object_id<<1)}|#{@prefix}:#{@base_table}:#{@model} vid=#{@_vid} where=#{@_where} wobs=#{@_wobs} select=#{@_select} aliases=#{@_table_alias}>"
end
# Jede via where uebergebene Condition wird geodert und alle zusammen werden geundet.
# "Konjunktive Normalform". Allerdings duerfen Conditions auch Komplexe Abfragen enthalten.
# Ex: builder.where( 'a = a', 'b = c').where( 'c = d', 'e = e').where( 'x = y').where( '( m = n AND o = p )', 'f = g')
# Ex: builder.where( ['a = a', 'b = c']).where( ['c = d', 'e = e']).where( 'x = y').where( ['( m = n AND o = p )', 'f = g'])
# #=> WHERE ( a = a OR b = c ) AND ( c = d OR e = e ) AND x = y ( ( m = n AND o = p ) OR f = g )
def where *cond
def where cond
@_where.push cond
self
end
@ -74,32 +79,54 @@ class SmqlToAR
end
def build_join orig, pretable, table, prekey, key
" JOIN #{quote_table_name orig.to_sym} AS #{quote_table_name table} ON #{column pretable, prekey} = #{column table, key} "
" LEFT JOIN #{orig} AS #{quote_table_name table} ON #{column pretable, prekey} = #{column table, key} "
end
def join table, model
return self if @_joined.include? table # Already joined
pretable = table[0...-1]
def sub_joins table, col, model, query
prefix, base_table = "#{@prefix}_sub", col.relation.table_name
join_ table, model, "(#{query.build( prefix).ar.to_sql})"
end
def join_ table, model, query, pretable = nil
pretable ||= table[0...-1]
@table_model[ table] = model
premodel = @table_model[ pretable]
t = @table_alias[ table]
pt = quote_table_name @table_alias[ table[ 0...-1]]
refl = premodel.reflections[table.last]
case refl.macro
when :has_many
@_joins += build_join model.table_name, pretable, t, premodel.primary_key, refl.primary_key_name
when :belongs_to
@_joins += build_join model.table_name, pretable, t, refl.primary_key_name, premodel.primary_key
when :has_and_belongs_to_many
jointable = [','] + table
@_joins += build_join refl.options[:join_table], pretable, @table_alias[jointable], premodel.primary_key, refl.primary_key_name
@_joins += build_join model.table_name, jointable, t, refl.association_foreign_key, refl.association_primary_key
else raise BuilderError, "Unkown reflection macro: #{refl.macro.inspect}"
case refl
when ActiveRecord::Reflection::ThroughReflection
through = refl.through_reflection
throughtable = table[0...-1]+[through.name.to_sym]
srctable = throughtable+[refl.source_reflection.name]
@table_model[ srctable] = model
@table_alias[ table] = @table_alias[ srctable]
join_ throughtable, through.klass, quote_table_name( through.table_name)
join_ srctable, refl.klass, query, throughtable
when ActiveRecord::Reflection::AssociationReflection
case refl.macro
when :has_many, :has_one
@_joins += build_join query, pretable, t, premodel.primary_key, refl.primary_key_name
when :belongs_to
@_joins += build_join query, pretable, t, refl.primary_key_name, premodel.primary_key
when :has_and_belongs_to_many
jointable = [','] + table
@_joins += build_join refl.options[:join_table], pretable, @table_alias[jointable], premodel.primary_key, refl.primary_key_name
@_joins += build_join query, jointable, t, refl.association_foreign_key, refl.association_primary_key
else raise BuilderError, "Unkown reflection macro: #{refl.macro.inspect}"
end
else raise BuilderError, "Unkown reflection type: #{refl.class.name}"
end
@_joined.push table
self
end
def joins table, model
table = table.flatten.compact
return self if @_joined.include? table # Already joined
join_ table, model, quote_table_name( model.table_name)
@_joined.push table
end
def includes table
@_includes.push table
self
@ -117,30 +144,22 @@ class SmqlToAR
self
end
class Dummy
def method_missing m, *a, &e
#p :dummy => m, :pars => a, :block => e
self
end
end
def build_ar
where_str = @_where.collect do |w|
w = Array.wrap w
1 == w.length ? w.first : "( #{w.join( ' OR ')} )"
end.join ' AND '
where_str = @_where.type_correction!.optimize!.build_where
incls = {}
@_includes.each do |inc|
b = incls
inc[1..-1].collect {|rel| b = b[rel] ||= {} }
end
@logger.debug incls: incls, joins: @_joins
@model = @model.
select( @_select.join( ', ')).
joins( @_joins).
where( where_str, @_wobs).
order( @_order.join( ', ')).
includes( incls)
@model = @model.limit @limit if @limit
@model = @model.offset @offset if @offset
@model
end
def fix_calculate
@ -159,4 +178,72 @@ class SmqlToAR
@model
end
end
class SubBuilder < Array
attr_reader :parent, :_where
delegate :wobs, :joins, :includes, :sub_joins, :vid, :quote_column_name, :quoter, :quote_table_name, :column, :to => :parent
def initialize parent, tmp = false
@parent = parent
@parent.where self unless @parend.nil? && tmp
end
def new parent, tmp = false
super parent, tmp
#return parent if self.class == parent.class
#super parent
end
alias where push
def type_correction!
collect! do |sub|
if sub.kind_of? Array
sub = default[ *sub] unless sub.respond_to?( :type_correction!)
sub.type_correction!
end
sub
end
self
end
def optimize!
ext = []
collect! do |sub|
sub = sub.optimize! if sub.kind_of? Array
if self.class == sub.class
ext.push *sub
nil
elsif sub.blank?
nil
else
sub
end
end.compact!
push *ext
self
end
def inspect
"#{self.class.name.sub( /.*::/, '')}[ #{collect(&:inspect).join ', '}]"
end
def default() SmqlToAR::And end
def default_new( parent) default.new self, parent, false end
def collect_build_where
collect {|x| x.respond_to?( :build_where) ? x.build_where : x.to_s }
end
end
class And < SubBuilder
def default; SmqlToAR::Or; end
def build_where
collect_build_where.join ' AND '
end
end
class Or < SubBuilder
def build_where
collect_build_where.join ' OR '
end
end
end