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Author SHA1 Message Date
Denis Knauf a4ce8a1e6b v0.0.7 2012-07-03 16:28:46 +02:00
Denis Knauf 7f43e9fb86 not compatible to ruby1.8 now! new: ActiveRecordExtensions 2012-07-03 16:28:27 +02:00
Denis Knauf 3d922c5e47 v0.0.6 2012-02-09 14:10:58 +01:00
Denis Knauf 7229fd185c overlaps: key-pairs will be ored 2012-02-09 13:31:24 +01:00
Denis Knauf 08d1610987 optimizer optimized (AND[Or["abc"]] -> "abc"). ()-bugfix in where-clause. 2012-01-18 13:34:26 +01:00
Denis Knauf ce81d21bd8 v0.0.5.2. build-methods renamed to an underscored class-name with suffix _build and aliases build to these methods created. equal_join_build fixed; it never use col.joins.each. #foreigh_key 2012-01-17 10:52:31 +01:00
Denis Knauf fbf5a7019c v0.0.5.1 2012-01-16 12:52:28 +01:00
Denis Knauf 27639e24b7 #join: ",".to_alias OPS! 2012-01-16 12:52:01 +01:00
Denis Knauf 40deac93bf v0.0.5 2012-01-12 17:12:22 +01:00
Denis Knauf 6f8569f80a OVERLAPS-Operator <=> bzw. <!> implementiert. SmqlToAR.reload_library löscht zuerst SmqlToAR, läd dann erst neu. 2012-01-12 17:11:55 +01:00
Denis Knauf a4a1d1b9e9 v0.0.4.8 2012-01-12 16:55:25 +01:00
Denis Knauf f6b9579073 over-datanamelen-bug fixed 2012-01-12 16:54:51 +01:00
Denis Knauf 3ba285548c patch fix 2011-12-05 12:39:41 +01:00
Denis Knauf 3d08496ec4 ( ( ) ( ) ) 2011-11-30 16:20:56 +01:00
Denis Knauf db1eec6fa7 v0.0.4.7 2011-11-30 13:55:34 +01:00
Denis Knauf edcc68a4ed dependency to methodphitamine removed. 2011-11-30 13:52:19 +01:00
Denis Knauf 2b3922e158 v0.0.4.6 2011-11-29 12:02:54 +01:00
Denis Knauf 493556fda2 Column::Col is comparable 2011-11-29 12:01:38 +01:00
Denis Knauf 1c97319d9c Column::Col-fixes (==, ===) 2011-11-29 12:00:40 +01:00
Denis Knauf 293909b58b v0.0.4.5 2011-11-28 15:48:13 +01:00
Denis Knauf 080237c5d7 bugfixes: ranges, vid===Symbol, And/Or in NotInRange 2011-11-28 15:47:48 +01:00
Denis Knauf 1d6baf41e3 0.0.4.4 unstable? 2011-11-22 12:15:36 +01:00
Denis Knauf 63be31734b debugging removed 2011-11-22 12:14:22 +01:00
Denis Knauf 69aceef180 aliased tables. firm: { "people[users]": {type: "User"}, "people[old]": {"age>:": 50 } # Every ToDo which has a User as Person or people older than 50. It is not an OR, it is an AND, but {people:{type:"User","age>":50}} or {"people":{type:"User"},"people":{"age>:":50} means every User older than 50. "users" and "old" are independet questions and both must be present, if firm should be true. 2011-11-21 10:06:46 +01:00
Denis Knauf 8eebb3ac1f VERSION 0.0.4.3 2011-10-27 15:28:34 +02:00
Denis Knauf 3b60648ee7 Version 0.0.4.3 2011-10-27 15:22:49 +02:00
Denis Knauf 5c68b74ee4 lesser logging. order-bug fixed 2011-10-27 15:21:56 +02:00
Denis Knauf f9ee0754f1 Version 0.0.4.2 2011-10-27 14:26:53 +02:00
Denis Knauf f3bcdd4b25 has_one-reflection (like has_many), group & having. subqueries deactivated 2011-10-25 16:31:18 +02:00
Denis Knauf d5aa6052ec lesser debug 2011-10-06 15:28:40 +02:00
Denis Knauf 11466211ac group and having clause init 2011-10-06 13:27:41 +02:00
Denis Knauf cc49fdefe9 v0.0.4.1 2011-10-06 13:24:44 +02:00
Denis Knauf 863ebca9cd fixes: OR... 2011-10-06 13:24:17 +02:00
Denis Knauf 09dfa782a8 debugging-output removed 2011-10-05 14:53:34 +02:00
Denis Knauf 75c314159b v0.0.4 2011-10-05 14:06:50 +02:00
Denis Knauf 2fdc45d1d5 "self" and or
=============

This lines mean the same:

	User.smql :self => {:id => 1}
	User.smql :id => 1
	User.smql 'self.id' => 1
	User.smql 'self.self.self.self.id' => 1

self is like a reflection to itself.

Very userful if you need the new disjunction:

	User.smql :self => [{:surname => 'Mueller', :givenname => 'Michael'}, {:givenname => 'Horst', :surname => 'Schlemmer'}], :firm => {:name => 'Hotel an der Elbe'}

SmqlToAR::Column
----------------

Rejects every `self`,  so it is really like no self,
but you use `'self'` as like as a simple reflection.
You can ask,  if it is self via Column#self?

SmqlToAR::QueryBuilder
======================

joins:  The old `#join`. Renames because SmqlToAR::And and SmqlToAR::Or which has Array#join,
        so we cannot delegate `#join` to the QueryBuilder.

`#where`
--------

Now only one argument!  Needed for SmqlToAR::And and SmqlToAR::Or.

`#build` will generates LEFT OUTER JOINS now.  Needed for disjunctions.
The most queries will work like before.
Problems:

	User.smql :articles => {}

Before it will return all users with articles,  now it will return also users without articles.
If you want to have only all users with articles,  you ask:

	User.smql :articles => {:id => true}

Will fail if id IS NULL,  but this should not happen. ;)

`SmqlToAR::And` and `SmqlToAR::Or`
==================================

`SmqlToAR::QueryBuilder`-proxies.  QueryBuilder let them build where-clauses.
And will will produce a conjunction and  Or a disjunction of course.
They delegates all QueryBuilder-methods to QueryBuilder.
Only `#where` will stored local and `#build` will do it partial.

They have the same superclass: `SmqlToAR::SubBuilder`.

The small changes
=================

* `SmqlToAR.reload_library`:  Reloads SmqlToAR-lib.  Useful while development.
* `SmqlToAR::ConditionTypes#conditions`:  Return all Conditions.  `#try_parse` uses it.
* Some classes have a new `#inspect`.
* `SmqlToAR::ConditionTypes#Exists` / `NotExists`:
  `{:id => true}` / `{:id => false}`:
  This object has setted an id or not?  `#id` must exists as column of course!
	Uses `IS NOT NULL` and `IS NULL`.
2011-10-05 13:25:56 +02:00
Denis Knauf 93fd3eeda4 pretty_print removed 2011-09-27 16:51:18 +02:00
Denis Knauf db5bbcb93a AR-through-reflections in query_builder; SmqlToAR.models returns the reflections-graph; limit, offset, sub-query "()" (not sub-conditions). unstable 0.3 2011-09-27 16:35:49 +02:00
6 changed files with 536 additions and 139 deletions

1
.gitignore vendored
View file

@ -1,2 +1,3 @@
pkg/**
.*.swp
smql.gemspec

2
TODO
View file

@ -1 +1,3 @@
1) gem-plugin
2) deprecated-warnings rails 3.1:
* DEPRECATION WARNING: primary_key_name is deprecated and will be removed from Rails 3.2 (use foreign_key instead).

View file

@ -1 +1 @@
0.0.2
0.0.7

View file

@ -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
@ -31,9 +43,9 @@ class SmqlToAR
# Die eigentliche Exception wird in @data[:exception] hinterlegt.
class SubSMQLError < SMQLError
def initialize query, model, exception
ex = {:class => exception.class, :message => exception.message}
ex = {class: exception.class, message: exception.message}
ex[:data] = exception.data if exception.respond_to? :data
super :query => query, :model => model.to_s, :exception => ex
super query: query, model: model.to_s, exception: ex
set_backtrace exception.backtrace
end
end
@ -43,43 +55,49 @@ class SmqlToAR
# Malformed ColOp
class UnexpectedColOpError < ParseError
def initialize model, colop, val
super :got => colop, :val => val, :model => model.to_s
super got: colop, val: val, model: model.to_s
end
end
class UnexpectedError < ParseError
def initialize model, colop, val
super :got => {colop => val}, :model => model.to_s
super got: {colop => val}, model: model.to_s
end
end
class NonExistingSelectableError < SMQLError
def initialize got
super :got => got
super got: got
end
end
class NonExistingColumnError < SMQLError
def initialize expected, got
super :expected => expected, :got => got
super expected: expected, got: got
end
end
class NonExistingRelationError < SMQLError
def initialize expected, got
super :expected => expected, :got => got
super expected: expected, got: got
end
end
class ProtectedColumnError < SMQLError
def initialize protected_column
super :protected_column => protected_column
super protected_column: protected_column
end
end
class OnlyOrderOnBaseError < SMQLError
class RootOnlyFunctionError < SMQLError
def initialize path
super :path => path
super path: path
end
end
class ConColumnError < SMQLError
def initialize expected, got
super expected: expected, got: got
end
end
@ -89,7 +107,8 @@ class SmqlToAR
# Model der Relation `rel` von `model`
def self.model_of model, rel
model.reflections[ rel.to_sym].andand.klass
r = model.reflections[ rel.to_sym].andand.klass
r.nil? && rel === :self ? model : r
end
# Eine Spalte in einer Tabelle, relativ zu `Column#model`.
@ -100,10 +119,43 @@ class SmqlToAR
attr_reader :path, :col
attr_accessor :model
class Col
include Comparable
attr_accessor :col, :as
def initialize col, as = nil
if col.kind_of? Col
@col, @as = col.col, col.as
elsif /^(.*?)\[(.*)\]$/ =~ col.to_s
@col, @as = $1, $2
else
@col, @as = col.to_s, as.to_s
@as = nil if @as.blank?
end
end
def to_s() @col end
def to_sym() to_s.to_sym end
def inspect() "#{@col}[@#{@as}]" end
def to_alias() "#{@col}[#{@as}]" end
def == other
other = Col.new other
@col == other.col && @as == other.as
end
def === other
@col == Col.new( other).col
end
end
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 {|x| x.to_s.split /[.\/]/ }.
flatten.
collect( &Col.method( :new)).
reject {|x| x === :self }
end
def last_model
@ -113,9 +165,11 @@ class SmqlToAR
def each
model = @model
@path.each do |rel|
model = SmqlToAR.model_of model, rel
return false unless model
yield rel, model
unless rel === :self
model = SmqlToAR.model_of model, rel
return false unless model
yield rel, model
end
end
model
end
@ -140,19 +194,24 @@ 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
@ -163,10 +222,8 @@ class SmqlToAR
SmqlToAR.logger = ::Rails.logger
end
end
else
require 'logger'
@@logger = Logger.new $stdout
end
@@logger = ::Rails.logger || begin require 'logger'; Logger.new( $stdout) end
class <<self
def logger=(logger) @@logger = logger end
@ -179,39 +236,83 @@ class SmqlToAR
#p model: @model, query: @query
end
def parse
benchmark 'SMQL parse' do
@conditions = ConditionTypes.try_parse @model, @query
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
#end
#p conditions: @conditions
self
end
def build
benchmark 'SMQL build query' do
#benchmark 'SMQL build query' do
@builder = QueryBuilder.new @model
table = @builder.base_table
@conditions.each {|condition| condition.build builder, table }
end
#end
#p builder: @builder
self
end
def ar
@ar ||= benchmark 'SMQL ar' do
@ar ||= #benchmark 'SMQL ar' do
@builder.to_ar
end
#end
end
def to_ar
benchmark 'SMQL' do
#benchmark 'SMQL' do
parse
build
ar
end
#end
end
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 }
Object.send :remove_const, :SmqlToAR
load fj[ 'smql_to_ar.rb']
load fj[ 'smql_to_ar', 'condition_types.rb']
load fj[ 'smql_to_ar', 'query_builder.rb']
end
module ActiveRecordExtensions
def self.included base
base.extend ClassMethods
end
module ClassMethods
def smql *params
SmqlToAR.to_ar self, *params
end
def smql_protected
[]
end
end
end
end
ActiveRecord::Base.send :include, SmqlToAR::ActiveRecordExtensions

View file

@ -14,6 +14,9 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# TODO:
# * Array als Typ ist zu allgemein. Allgemeine Lösung gesucht, um die Typen im Array angeben zu können.
class SmqlToAR
#############################################################################
# Alle Subklassen (qualitativ: ConditionTypes::*), die als Superklasse Condition haben,
@ -25,28 +28,44 @@ 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*(?!\])\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
@ -72,19 +91,28 @@ 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 :class => self, :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? {|x| x === 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
#p init: self, caller: caller
@model, @cols = model, cols
@value = case val
when Hash, Range then val
@ -93,6 +121,10 @@ 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
@ -103,53 +135,55 @@ 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' )
# 3) {"givenname|surname=", ["Peter", "Mueller"]}
# #=> ( givenname = 'Peter' OR surname = 'Peter' ) AND ( givenname = 'Mueller' OR surname = 'Mueller' )
def build builder, table
def condition_build builder, table
values = Hash[ @value.collect {|value| [ builder.vid, value ] } ]
values.each {|k, v| builder.wobs k.sym => v }
values.each {|k, v| builder.wobs k.to_sym => v }
if 1 == @cols.length
@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
end
alias build condition_build
end
class NotInRange < Condition
Operator = '!..'
Where = "%s NOT BETWEEN %s AND %s"
Where = '%s NOT BETWEEN %s AND %s'
Expected = [Range, lambda {|val| Array === val && 2 == val.length } ]
def initialze model, cols, val
if Array === val && 2 == val.length
def initialize model, cols, val
if Array === val
f, l = val
f, l = Time.parse(f), Time.parse(l) if f.kind_of? String
val = f..l
@ -157,23 +191,65 @@ class SmqlToAR
super model, cols, val
end
def build builder, table
builder.wobs (v1 = builder.vid) => @value.begin, (v2 = builder.vid) => @value.end
def not_in_range_build builder, table
builder.wobs (v1 = builder.vid).to_sym => @value.begin, (v2 = builder.vid).to_sym => @value.end
@cols.each do |col|
col.joins builder, table
builder.where self.class::Where % [ builder.column( table+col.path, col.col), v1, v2]
end
self
end
alias build not_in_range_build
end
InRange = simple_condition NotInRange, '..', "%s BETWEEN %s AND %s"
InRange = simple_condition NotInRange, '..', '%s BETWEEN %s AND %s'
# Every key-pair will be ORed. No multiple values possible.
class Overlaps < Condition
Operator, Where = '<=>', '(%s, %s) OVERLAPS (%s, %s)'
Expected = [Range, lambda {|val|
Array === val && 2 == val.length &&
[Time, Date, String].any? {|v|v===val[0]} &&
[Numeric, String].any? {|v|v===val[1]}
}]
def initialize model, cols, val
if Array === val
f = Time.parse( val[0]).localtime
l = val[1]
l = case l
when String then Time.parse( l).localtime
when Numeric then f+l
else raise ArgumentError, "Unexpected type for end-value #{l.inspect}"
end
f += f.utc_offset
l += l.utc_offset
val = f.utc..l.utc
end
super model, cols, val
end
def overlaps_build builder, table
builder = Or.new builder
builder.wobs (v1 = builder.vid).to_sym => @value.begin, (v2 = builder.vid).to_sym => @value.end
v1 = "TIMESTAMP #{v1}"
v2 = "TIMESTAMP #{v2}"
@cols.each do |col|
col.joins builder, table
end.each_slice 2 do |f,s|
builder.where self.class::Where % [
builder.column( table+f.path, f.col), builder.column( table+s.path, s.col), v1, v2]
end
end
alias build overlaps_build
end
NotOverlaps = simple_condition Overlaps, '<=>', 'NOT (%s, %s) OVERLAPS (%s, %s)'
class NotIn < Condition
Operator = '!|='
Where = "%s NOT IN (%s)"
Expected = [Array]
def build builder, table
def not_in_build builder, table
builder.wobs (v = builder.vid).to_sym => @value
@cols.each do |col|
col.joins builder, table
@ -181,54 +257,119 @@ class SmqlToAR
end
self
end
alias build not_in_build
end
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]
class StringTimeGreaterThanOrEqual < Condition
Operator, Where, Expected = '>=', '%s >= %s', [Time, Date, String]
def initialize model, cols, val
super model, cols, Time.parse( val.to_s)
end
end
StringTimeLesserThanOrEqual = simple_condition StringTimeGreaterThanOrEqual, '<=', "%s <= %s"
# 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? {|y| y.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
def equal_join_build builder, table
if 2 < @cols.first.second.length
b2, b3 = And, Or
else
b2, b3 = Or, And
end
b2 = b2.new builder
@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 builder, table
builder.joins t, model
b4 = b3.new( b2)
sub.each do |i|
b5 = And.new b4
i.collect {|j| j.build b5, t }
end
end
self
end
alias build equal_join_build
end
Equal = simple_condition Condition, '=', "%s = %s", [Array, String, Numeric]
Equal2 = simple_condition Equal, '', "%s = %s", [String, Numeric]
# 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 sub_equal_join_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 {|x| x.build builder, t }
end
self
end
alias build sub_equal_join_build
end
=end
Equal = simple_condition Condition, '=', "%s = %s", [Array, String, Numeric, Date, Time]
Equal2 = simple_condition Equal, '', "%s = %s", [String, Numeric, Date, Time]
GreaterThan = simple_condition Condition, '>', "%s > %s", [Array, Numeric]
StringTimeGreaterThan = simple_condition StringTimeGreaterThanOrEqual, '>', "%s > %s"
LesserThan = simple_condition Condition, '<', "%s < %s", [Array, Numeric]
StringTimeLesserThan = simple_condition StringTimeGreaterThanOrEqual, '<', "%s < %s"
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
@ -236,10 +377,10 @@ 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
def select_build builder, table
@cols.each do |col|
if col.exist_in?
col.joins builder, table
@ -251,6 +392,7 @@ class SmqlToAR
end
self
end
alias build select_build
end
class Functions < Condition
@ -258,13 +400,19 @@ 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? {|x| x === args }
end
def inspect
"#{self.name}( :name=>#{self::Name}, :expected=>#{self::Expected})"
end
end
def initialize model, func, args
@ -277,47 +425,64 @@ 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
def build builder, table
def order_build builder, table
return if @args.blank?
@args.each do |o|
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
alias build order_build
end
class Limit < Function
Name = :limit
Expected = [Fixnum]
def limit_build builder, table
raise_unless 1 == table.length, RootOnlyFunctionError.new( table)
builder.limit = Array.wrap(@args).first.to_i
end
alias build limit_build
end
class Offset < Function
Name = :offset
Expected = [Fixnum]
def offset_build builder, table
raise_unless 1 == table.length, RootOnlyFunctionError.new( table)
builder.offset = Array.wrap(@args).first.to_i
end
alias build offset_build
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

View file

@ -22,36 +22,74 @@ 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
def === other
to_s === other || to_sym === other || to_i === other || self == other || self === other
end
end
attr_reader :table_alias, :model, :table_model, :base_table, :_where, :_select, :_wobs, :_joins
attr_accessor :logger
class Aliases < Hash
attr_accessor :counter, :prefix
def initialize model
@logger = SmqlToAR.logger
@table_alias = Hash.new do |h, k|
k = Array.wrap k
h[k] = "smql,#{k.join(',')}"
def initialize prefix, *a, &e
@counter, @prefix = 0, prefix || 'smql'
super *a, &e
end
@_vid, @_where, @_wobs, @model, @quoter = 0, [], {}, model, model.connection
@base_table = [model.table_name.to_sym]
def format name
pre, suf = name.split( ',', 2)
return name unless suf
pre += ",#{@counter += 1},"
l = 60-pre.length
n = suf[(suf.length<=l ? 0 : -l)..-1]
n == suf ? pre+n : "#{pre},,,#{n}"
end
def name n
n.collect( &:to_alias).join ','
end
def [] k
n = name k
v = super n
v = self[k] = format( "#{prefix},#{n}") unless v
v
end
def []= k, v
super name( k), v
end
end
attr_reader :table_alias, :model, :table_model, :base_table, :_where, :_select, :_wobs, :_joins, :prefix, :_vid
attr_accessor :logger, :limit, :offset
def initialize model, prefix = nil
@prefix = "smql"
@logger = SmqlToAR.logger
@table_alias = Aliases.new @prefix
@_vid, @_where, @_wobs, @model, @quote = 0, SmqlToAR::And[], {}, model, model.connection
@base_table = [Column::Col.new( model.table_name)]
@table_alias[ @base_table] = @base_table.first
t = quote_table_name @table_alias[ @base_table]
@_select, @_joins, @_joined, @_includes, @_order = ["DISTINCT #{t}.*"], "", [], [], []
t = quote_table_name @base_table.first.col
@_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
@ -62,44 +100,71 @@ class SmqlToAR
end
def quote_column_name name
@quoter.quote_column_name( name).gsub /"\."/, ','
@quote.quote_column_name( name).gsub /"\."/, ','
end
def quote_table_name name
@quoter.quote_table_name( name).gsub /"\."/, ','
name = case name
when Array, Column::Col then @table_alias[Array.wrap name]
else name.to_s
end
@quote.quote_table_name name
end
def column table, name
"#{quote_table_name table.kind_of?(String) ? table : @table_alias[table]}.#{quote_column_name name}"
"#{quote_table_name table}.#{quote_column_name name}"
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} "
"\tLEFT JOIN #{orig} AS #{quote_table_name table}\n\tON #{column pretable, prekey} = #{column table, key}\n"
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]
@table_model.rehash
premodel = @table_model.find {|k,v| pretable == k }[1]
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}"
pt = quote_table_name table[ 0...-1]
refl = premodel.reflections[table.last.to_sym]
case refl
when ActiveRecord::Reflection::ThroughReflection
through = refl.through_reflection
through_table = table[0...-1]+[Column::Col.new( through.name, table.last.as)]
srctable = through_table+[Column::Col.new( refl.source_reflection.name, table.last.as)]
@table_model[ srctable] = model
@table_alias[ table] = @table_alias[ srctable]
join_ through_table, through.klass, quote_table_name( through.table_name)
join_ srctable, refl.klass, query, through_table
when ActiveRecord::Reflection::AssociationReflection
case refl.macro
when :has_many, :has_one
@_joins += build_join query, pretable, t, premodel.primary_key, refl.foreign_key
when :belongs_to
@_joins += build_join query, pretable, t, refl.foreign_key, premodel.primary_key
when :has_and_belongs_to_many
jointable = [Column::Col.new(',')] + table
@_joins += build_join refl.options[:join_table], pretable, @table_alias[ jointable], premodel.primary_key, refl.foreign_key
@_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} #{refl.macro.inspect}"
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
@ -111,36 +176,28 @@ class SmqlToAR
end
def order table, col, o
tc = column table, col
ct = column table, col
@_select.push ct
@_order.push "#{ct} #{:DESC == o ? :DESC : :ASC}"
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 +216,75 @@ class SmqlToAR
@model
end
end
class SubBuilder < Array
attr_reader :parent, :_where
delegate :wobs, :joins, :includes, :sub_joins, :vid, :quote_column_name, :quote, :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? SubBuilder
if self.class == sub.class
ext.push *sub
nil
elsif sub.blank?
nil
elsif 1 == sub.size
sub.first
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 indent = nil
indent = (indent||0) + 1
collect {|x| "(#{x.respond_to?( :build_where) ? x.build_where( indent) : x.to_s})" }
end
end
class And < SubBuilder
def default; SmqlToAR::Or; end
def build_where indent = nil
collect_build_where( indent).join " AND\n"+"\t"*(indent||0)
end
end
class Or < SubBuilder
def build_where indent = nil
collect_build_where( indent).join " OR\n"+"\t"*(indent||0)
end
end
end