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.

lib/smql_to_ar.rb

@@ -107,9 +107,9 @@ class SmqlToAR
 
 	# Model der Relation `rel` von `model`
 	def self.model_of model, rel
-		rel = rel.to_sym
-		r = model.reflections[ rel].andand.klass
-		r.nil? && :self == rel ? model : r
+		p model_of: rel.to_sym, model: model
+		r = model.reflections[ rel.to_sym].andand.klass
+		r.nil? && rel === :self ? model : r
 	end
 
 	# Eine Spalte in einer Tabelle, relativ zu `Column#model`.
@@ -120,10 +120,43 @@ class SmqlToAR
 		attr_reader :path, :col
 		attr_accessor :model
 
+		class Col
+			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.col
+			end
+
+			def === other
+				other = Col.new other
+				@col == other.col
+			end
+		end
+
 		def initialize model, *col
 			@model = model
 			@last_model = nil
-			*@path, @col = *Array.wrap( col).collect( &it.to_s.split( /[.\/]/)).flatten.collect( &:to_sym).reject( &it==:self)
+			*@path, @col = *Array.wrap( col).
+					collect( &it.to_s.split( /[.\/]/)).
+					flatten.
+					collect( &Col.method( :new)).
+					reject( &it===:self)
 		end
 
 		def last_model
@@ -132,9 +165,10 @@ class SmqlToAR
 
 		def each
 			model = @model
+			p each: self, path: @path
 			@path.each do |rel|
-				rel = rel.to_sym
-				unless :self == rel
+				p rel: rel
+				unless rel === :self
 					model = SmqlToAR.model_of model, rel
 					return false  unless model
 					yield rel, model
@@ -169,6 +203,7 @@ class SmqlToAR
 				exe.call pp, model
 			end
 	 	end
+
 		def self?()  !@col  end
 		def length() @path.length+(self.self? ? 0 : 1)  end
 		def size()   @path.size+(self.self? ? 0 : 1)  end

lib/smql_to_ar/condition_types.rb

@@ -56,9 +56,11 @@ class SmqlToAR
 				r = nil
 				#p :try_parse => { :model => model, :colop => colop, :value => val }
 				conditions.each do |c|
-					raise_unless colop =~ /^(?:\d*:)?(.*?)(\W*)$/, UnexpectedColOpError.new( model, colop, val)
+					raise_unless colop =~ /^(?:\d*:)?(.*?)((?:\W*(?!\])\W)?)$/, UnexpectedColOpError.new( model, colop, val)
 					col, op = $1, $2
+					p col: col, op: op
 					col = split_keys( col).collect {|c| Column.new model, c }
+					p col: col
 					r = c.try_parse model, col, op, val
 					break  if r
 				end
@@ -246,6 +248,7 @@ class SmqlToAR
 					model, *sub = sub
 					t = table + col.path + [col.col]
 					col.joins.each {|j, m| builder.joins table+j, m }
+					p build_t: t
 					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 }

lib/smql_to_ar/query_builder.rb

@@ -28,20 +28,27 @@ class SmqlToAR
 			def to_i()  @vid  end
 		end
 
+		class Aliases < Hash
+			def self.new prefix, *a, &e
+				e ||= lambda do |h, k|
+					j = Array.wrap( k).compact
+					h[k] = h.key?(j) ? h[j] : "#{prefix},#{j.collect( &:to_alias).join( ',')}"
+				end
+				super *a, &e
+			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 = Hash.new do |h, k|
-				j = Array.wrap( k).compact
-				h[k] = h.key?(j) ? h[j] : "#{@prefix},#{j.join(',')}"
-			end
+			@table_alias = Aliases.new @prefix
 			@_vid, @_where, @_wobs, @model, @quoter = 0, SmqlToAR::And[], {}, model, model.connection
-			@base_table = [model.table_name.to_sym]
+			@base_table = [Column::Col.new( model.table_name)]
 			@table_alias[ @base_table] = @base_table.first
-			t = quote_table_name @table_alias[ @base_table]
+			t = quote_table_name @base_table.first.col
 			@_select, @_joins, @_joined, @_includes, @_order = ["DISTINCT #{t}.*"], "", [@base_table], [], []
 			@table_model = {@base_table => @model}
 		end
@@ -49,7 +56,7 @@ class SmqlToAR
 		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}>"
+			"#<#{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.
@@ -71,14 +78,19 @@ class SmqlToAR
 		end
 
 		def quote_table_name name
+			name = case name
+				when Array, Column::Col then @table_alias[Array.wrap name]
+				else name.to_s
+				end
 			@quoter.quote_table_name( name).gsub /"\."/, ','
 		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
+			p build_join: {orig: orig, pretable: pretable, table: table, prekey: prekey, key: key}, alias: @table_alias
 			" LEFT JOIN #{orig} AS #{quote_table_name table} ON #{column pretable, prekey} = #{column table, key} "
 		end
 
@@ -92,13 +104,14 @@ class SmqlToAR
 			@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]
+			pt = quote_table_name table[ 0...-1]
+			p table: table
+			refl = premodel.reflections[table.last.to_sym]
 			case refl
 			when ActiveRecord::Reflection::ThroughReflection
 				through = refl.through_reflection
-				throughtable = table[0...-1]+[through.name.to_sym]
-				srctable = throughtable+[refl.source_reflection.name]
+				throughtable = table[0...-1]+[Column::Col.new( through.name, table.last.as)]
+				srctable = throughtable+[Column::Col.new( refl.source_reflection.name, table.last.as)]
 				@table_model[ srctable] = model
 				@table_alias[ table] = @table_alias[ srctable]
 				join_ throughtable, through.klass, quote_table_name( through.table_name)