--- /dev/null
+module CompositePrimaryKeys
+ module ActiveRecord
+ module Associations
+ def self.append_features(base)
+ super
+ base.send(:extend, ClassMethods)
+ end
+
+ # Composite key versions of Association functions
+ module ClassMethods
+
+ def construct_counter_sql_with_included_associations(options, join_dependency)
+ scope = scope(:find)
+ sql = "SELECT COUNT(DISTINCT #{quoted_table_columns(primary_key)})"
+
+ # A (slower) workaround if we're using a backend, like sqlite, that doesn't support COUNT DISTINCT.
+ if !self.connection.supports_count_distinct?
+ sql = "SELECT COUNT(*) FROM (SELECT DISTINCT #{quoted_table_columns(primary_key)}"
+ end
+
+ sql << " FROM #{quoted_table_name} "
+ sql << join_dependency.join_associations.collect{|join| join.association_join }.join
+
+ add_joins!(sql, options, scope)
+ add_conditions!(sql, options[:conditions], scope)
+ add_limited_ids_condition!(sql, options, join_dependency) if !using_limitable_reflections?(join_dependency.reflections) && ((scope && scope[:limit]) || options[:limit])
+
+ add_limit!(sql, options, scope) if using_limitable_reflections?(join_dependency.reflections)
+
+ if !self.connection.supports_count_distinct?
+ sql << ")"
+ end
+
+ return sanitize_sql(sql)
+ end
+
+ def construct_finder_sql_with_included_associations(options, join_dependency)
+ scope = scope(:find)
+ sql = "SELECT #{column_aliases(join_dependency)} FROM #{(scope && scope[:from]) || options[:from] || quoted_table_name} "
+ sql << join_dependency.join_associations.collect{|join| join.association_join }.join
+
+ add_joins!(sql, options, scope)
+ add_conditions!(sql, options[:conditions], scope)
+ add_limited_ids_condition!(sql, options, join_dependency) if !using_limitable_reflections?(join_dependency.reflections) && options[:limit]
+
+ sql << "ORDER BY #{options[:order]} " if options[:order]
+
+ add_limit!(sql, options, scope) if using_limitable_reflections?(join_dependency.reflections)
+
+ return sanitize_sql(sql)
+ end
+
+ def table_columns(columns)
+ columns.collect {|column| "#{self.quoted_table_name}.#{connection.quote_column_name(column)}"}
+ end
+
+ def quoted_table_columns(columns)
+ table_columns(columns).join(ID_SEP)
+ end
+
+ end
+
+ end
+ end
+end
+
+module ActiveRecord::Associations::ClassMethods
+ class JoinDependency
+ def construct_association(record, join, row)
+ case join.reflection.macro
+ when :has_many, :has_and_belongs_to_many
+ collection = record.send(join.reflection.name)
+ collection.loaded
+
+ join_aliased_primary_keys = join.active_record.composite? ?
+ join.aliased_primary_key : [join.aliased_primary_key]
+ return nil if
+ record.id.to_s != join.parent.record_id(row).to_s or not
+ join_aliased_primary_keys.select {|key| row[key].nil?}.blank?
+ association = join.instantiate(row)
+ collection.target.push(association) unless collection.target.include?(association)
+ when :has_one, :belongs_to
+ return if record.id.to_s != join.parent.record_id(row).to_s or
+ [*join.aliased_primary_key].any? { |key| row[key].nil? }
+ association = join.instantiate(row)
+ record.send("set_#{join.reflection.name}_target", association)
+ else
+ raise ConfigurationError, "unknown macro: #{join.reflection.macro}"
+ end
+ return association
+ end
+
+ class JoinBase
+ def aliased_primary_key
+ active_record.composite? ?
+ primary_key.inject([]) {|aliased_keys, key| aliased_keys << "#{ aliased_prefix }_r#{aliased_keys.length}"} :
+ "#{ aliased_prefix }_r0"
+ end
+
+ def record_id(row)
+ active_record.composite? ?
+ aliased_primary_key.map {|key| row[key]}.to_composite_ids :
+ row[aliased_primary_key]
+ end
+
+ def column_names_with_alias
+ unless @column_names_with_alias
+ @column_names_with_alias = []
+ keys = active_record.composite? ? primary_key.map(&:to_s) : [primary_key]
+ (keys + (column_names - keys)).each_with_index do |column_name, i|
+ @column_names_with_alias << [column_name, "#{ aliased_prefix }_r#{ i }"]
+ end
+ end
+ return @column_names_with_alias
+ end
+ end
+
+ class JoinAssociation < JoinBase
+ alias single_association_join association_join
+ def association_join
+ reflection.active_record.composite? ? composite_association_join : single_association_join
+ end
+
+ def composite_association_join
+ join = case reflection.macro
+ when :has_and_belongs_to_many
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_alias_for(options[:join_table], aliased_join_table_name),
+ composite_join_clause(
+ full_keys(aliased_join_table_name, options[:foreign_key] || reflection.active_record.to_s.classify.foreign_key),
+ full_keys(reflection.active_record.table_name, reflection.active_record.primary_key)
+ )
+ ] +
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_name_and_alias,
+ composite_join_clause(
+ full_keys(aliased_table_name, klass.primary_key),
+ full_keys(aliased_join_table_name, options[:association_foreign_key] || klass.table_name.classify.foreign_key)
+ )
+ ]
+ when :has_many, :has_one
+ case
+ when reflection.macro == :has_many && reflection.options[:through]
+ through_conditions = through_reflection.options[:conditions] ? "AND #{interpolate_sql(sanitize_sql(through_reflection.options[:conditions]))}" : ''
+ if through_reflection.options[:as] # has_many :through against a polymorphic join
+ raise AssociationNotSupported, "Polymorphic joins not supported for composite keys"
+ else
+ if source_reflection.macro == :has_many && source_reflection.options[:as]
+ raise AssociationNotSupported, "Polymorphic joins not supported for composite keys"
+ else
+ case source_reflection.macro
+ when :belongs_to
+ first_key = primary_key
+ second_key = options[:foreign_key] || klass.to_s.classify.foreign_key
+ when :has_many
+ first_key = through_reflection.klass.to_s.classify.foreign_key
+ second_key = options[:foreign_key] || primary_key
+ end
+
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_alias_for(through_reflection.klass.table_name, aliased_join_table_name),
+ composite_join_clause(
+ full_keys(aliased_join_table_name, through_reflection.primary_key_name),
+ full_keys(parent.aliased_table_name, parent.primary_key)
+ )
+ ] +
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_name_and_alias,
+ composite_join_clause(
+ full_keys(aliased_table_name, first_key),
+ full_keys(aliased_join_table_name, second_key)
+ )
+ ]
+ end
+ end
+
+ when reflection.macro == :has_many && reflection.options[:as]
+ raise AssociationNotSupported, "Polymorphic joins not supported for composite keys"
+ when reflection.macro == :has_one && reflection.options[:as]
+ raise AssociationNotSupported, "Polymorphic joins not supported for composite keys"
+ else
+ foreign_key = options[:foreign_key] || reflection.active_record.name.foreign_key
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_name_and_alias,
+ composite_join_clause(
+ full_keys(aliased_table_name, foreign_key),
+ full_keys(parent.aliased_table_name, parent.primary_key)),
+ ]
+ end
+ when :belongs_to
+ " LEFT OUTER JOIN %s ON %s " % [
+ table_name_and_alias,
+ composite_join_clause(
+ full_keys(aliased_table_name, reflection.klass.primary_key),
+ full_keys(parent.aliased_table_name, options[:foreign_key] || klass.to_s.foreign_key)),
+ ]
+ else
+ ""
+ end || ''
+ join << %(AND %s.%s = %s ) % [
+ aliased_table_name,
+ reflection.active_record.connection.quote_column_name(reflection.active_record.inheritance_column),
+ klass.connection.quote(klass.name)] unless klass.descends_from_active_record?
+ join << "AND #{interpolate_sql(sanitize_sql(reflection.options[:conditions]))} " if reflection.options[:conditions]
+ join
+ end
+
+ def full_keys(table_name, keys)
+ connection = reflection.active_record.connection
+ quoted_table_name = connection.quote_table_name(table_name)
+ if keys.is_a?(Array)
+ keys.collect {|key| "#{quoted_table_name}.#{connection.quote_column_name(key)}"}.join(CompositePrimaryKeys::ID_SEP)
+ else
+ "#{quoted_table_name}.#{connection.quote_column_name(keys)}"
+ end
+ end
+
+ def composite_join_clause(full_keys1, full_keys2)
+ full_keys1 = full_keys1.split(CompositePrimaryKeys::ID_SEP) if full_keys1.is_a?(String)
+ full_keys2 = full_keys2.split(CompositePrimaryKeys::ID_SEP) if full_keys2.is_a?(String)
+ where_clause = [full_keys1, full_keys2].transpose.map do |key1, key2|
+ "#{key1}=#{key2}"
+ end.join(" AND ")
+ "(#{where_clause})"
+ end
+ end
+ end
+end
+
+module ActiveRecord::Associations
+ class AssociationProxy #:nodoc:
+
+ def composite_where_clause(full_keys, ids)
+ full_keys = full_keys.split(CompositePrimaryKeys::ID_SEP) if full_keys.is_a?(String)
+
+ if ids.is_a?(String)
+ ids = [[ids]]
+ elsif not ids.first.is_a?(Array) # if single comp key passed, turn into an array of 1
+ ids = [ids.to_composite_ids]
+ end
+
+ where_clause = ids.map do |id_set|
+ transposed = id_set.size == 1 ? [[full_keys, id_set.first]] : [full_keys, id_set].transpose
+ transposed.map do |full_key, id|
+ "#{full_key.to_s}=#{@reflection.klass.sanitize(id)}"
+ end.join(" AND ")
+ end.join(") OR (")
+
+ "(#{where_clause})"
+ end
+
+ def composite_join_clause(full_keys1, full_keys2)
+ full_keys1 = full_keys1.split(CompositePrimaryKeys::ID_SEP) if full_keys1.is_a?(String)
+ full_keys2 = full_keys2.split(CompositePrimaryKeys::ID_SEP) if full_keys2.is_a?(String)
+
+ where_clause = [full_keys1, full_keys2].transpose.map do |key1, key2|
+ "#{key1}=#{key2}"
+ end.join(" AND ")
+
+ "(#{where_clause})"
+ end
+
+ def full_composite_join_clause(table1, full_keys1, table2, full_keys2)
+ connection = @reflection.active_record.connection
+ full_keys1 = full_keys1.split(CompositePrimaryKeys::ID_SEP) if full_keys1.is_a?(String)
+ full_keys2 = full_keys2.split(CompositePrimaryKeys::ID_SEP) if full_keys2.is_a?(String)
+
+ quoted1 = connection.quote_table_name(table1)
+ quoted2 = connection.quote_table_name(table2)
+
+ where_clause = [full_keys1, full_keys2].transpose.map do |key_pair|
+ "#{quoted1}.#{connection.quote_column_name(key_pair.first)}=#{quoted2}.#{connection.quote_column_name(key_pair.last)}"
+ end.join(" AND ")
+
+ "(#{where_clause})"
+ end
+
+ def full_keys(table_name, keys)
+ connection = @reflection.active_record.connection
+ quoted_table_name = connection.quote_table_name(table_name)
+ keys = keys.split(CompositePrimaryKeys::ID_SEP) if keys.is_a?(String)
+ if keys.is_a?(Array)
+ keys.collect {|key| "#{quoted_table_name}.#{connection.quote_column_name(key)}"}.join(CompositePrimaryKeys::ID_SEP)
+ else
+ "#{quoted_table_name}.#{connection.quote_column_name(keys)}"
+ end
+ end
+
+ def full_columns_equals(table_name, keys, quoted_ids)
+ connection = @reflection.active_record.connection
+ quoted_table_name = connection.quote_table_name(table_name)
+ if keys.is_a?(Symbol) or (keys.is_a?(String) and keys == keys.to_s.split(CompositePrimaryKeys::ID_SEP))
+ return "#{quoted_table_name}.#{connection.quote_column_name(keys)} = #{quoted_ids}"
+ end
+ keys = keys.split(CompositePrimaryKeys::ID_SEP) if keys.is_a?(String)
+ quoted_ids = quoted_ids.split(CompositePrimaryKeys::ID_SEP) if quoted_ids.is_a?(String)
+ keys_ids = [keys, quoted_ids].transpose
+ keys_ids.collect {|key, id| "(#{quoted_table_name}.#{connection.quote_column_name(key)} = #{id})"}.join(' AND ')
+ end
+
+ def set_belongs_to_association_for(record)
+ if @reflection.options[:as]
+ record["#{@reflection.options[:as]}_id"] = @owner.id unless @owner.new_record?
+ record["#{@reflection.options[:as]}_type"] = @owner.class.base_class.name.to_s
+ else
+ key_values = @reflection.primary_key_name.to_s.split(CompositePrimaryKeys::ID_SEP).zip([@owner.id].flatten)
+ key_values.each{|key, value| record[key] = value} unless @owner.new_record?
+ end
+ end
+ end
+
+ class HasAndBelongsToManyAssociation < AssociationCollection #:nodoc:
+ def construct_sql
+ @reflection.options[:finder_sql] &&= interpolate_sql(@reflection.options[:finder_sql])
+
+ if @reflection.options[:finder_sql]
+ @finder_sql = @reflection.options[:finder_sql]
+ else
+ @finder_sql = full_columns_equals(@reflection.options[:join_table], @reflection.primary_key_name, @owner.quoted_id)
+ @finder_sql << " AND (#{conditions})" if conditions
+ end
+
+ @join_sql = "INNER JOIN #{@reflection.active_record.connection.quote_table_name(@reflection.options[:join_table])} ON " +
+ full_composite_join_clause(@reflection.klass.table_name, @reflection.klass.primary_key, @reflection.options[:join_table], @reflection.association_foreign_key)
+ end
+ end
+
+ class HasManyAssociation < AssociationCollection #:nodoc:
+ def construct_sql
+ case
+ when @reflection.options[:finder_sql]
+ @finder_sql = interpolate_sql(@reflection.options[:finder_sql])
+
+ when @reflection.options[:as]
+ @finder_sql =
+ "#{@reflection.klass.quoted_table_name}.#{@reflection.options[:as]}_id = #{@owner.quoted_id} AND " +
+ "#{@reflection.klass.quoted_table_name}.#{@reflection.options[:as]}_type = #{@owner.class.quote_value(@owner.class.base_class.name.to_s)}"
+ @finder_sql << " AND (#{conditions})" if conditions
+
+ else
+ @finder_sql = full_columns_equals(@reflection.klass.table_name, @reflection.primary_key_name, @owner.quoted_id)
+ @finder_sql << " AND (#{conditions})" if conditions
+ end
+
+ if @reflection.options[:counter_sql]
+ @counter_sql = interpolate_sql(@reflection.options[:counter_sql])
+ elsif @reflection.options[:finder_sql]
+ # replace the SELECT clause with COUNT(*), preserving any hints within /* ... */
+ @reflection.options[:counter_sql] = @reflection.options[:finder_sql].sub(/SELECT (\/\*.*?\*\/ )?(.*)\bFROM\b/im) { "SELECT #{$1}COUNT(*) FROM" }
+ @counter_sql = interpolate_sql(@reflection.options[:counter_sql])
+ else
+ @counter_sql = @finder_sql
+ end
+ end
+
+ def delete_records(records)
+ if @reflection.options[:dependent]
+ records.each { |r| r.destroy }
+ else
+ connection = @reflection.active_record.connection
+ field_names = @reflection.primary_key_name.split(',')
+ field_names.collect! {|n| connection.quote_column_name(n) + " = NULL"}
+ records.each do |r|
+ where_clause = nil
+
+ if r.quoted_id.to_s.include?(CompositePrimaryKeys::ID_SEP)
+ where_clause_terms = [@reflection.klass.primary_key, r.quoted_id].transpose.map do |pair|
+ "(#{connection.quote_column_name(pair[0])} = #{pair[1]})"
+ end
+ where_clause = where_clause_terms.join(" AND ")
+ else
+ where_clause = connection.quote_column_name(@reflection.klass.primary_key) + ' = ' + r.quoted_id
+ end
+
+ @reflection.klass.update_all( field_names.join(',') , where_clause)
+ end
+ end
+ end
+ end
+
+ class HasOneAssociation < BelongsToAssociation #:nodoc:
+ def construct_sql
+ case
+ when @reflection.options[:as]
+ @finder_sql =
+ "#{@reflection.klass.quoted_table_name}.#{@reflection.options[:as]}_id = #{@owner.quoted_id} AND " +
+ "#{@reflection.klass.quoted_table_name}.#{@reflection.options[:as]}_type = #{@owner.class.quote_value(@owner.class.base_class.name.to_s)}"
+ else
+ @finder_sql = full_columns_equals(@reflection.klass.table_name, @reflection.primary_key_name, @owner.quoted_id)
+ end
+
+ @finder_sql << " AND (#{conditions})" if conditions
+ end
+ end
+
+ class HasManyThroughAssociation < HasManyAssociation #:nodoc:
+ def construct_conditions_with_composite_keys
+ if @reflection.through_reflection.options[:as]
+ construct_conditions_without_composite_keys
+ else
+ conditions = full_columns_equals(@reflection.through_reflection.table_name, @reflection.through_reflection.primary_key_name, @owner.quoted_id)
+ conditions << " AND (#{sql_conditions})" if sql_conditions
+ conditions
+ end
+ end
+ alias_method_chain :construct_conditions, :composite_keys
+
+ def construct_joins_with_composite_keys(custom_joins = nil)
+ if @reflection.through_reflection.options[:as] || @reflection.source_reflection.options[:as]
+ construct_joins_without_composite_keys(custom_joins)
+ else
+ if @reflection.source_reflection.macro == :belongs_to
+ reflection_primary_key = @reflection.klass.primary_key
+ source_primary_key = @reflection.source_reflection.primary_key_name
+ else
+ reflection_primary_key = @reflection.source_reflection.primary_key_name
+ source_primary_key = @reflection.klass.primary_key
+ end
+
+ "INNER JOIN %s ON %s #{@reflection.options[:joins]} #{custom_joins}" % [
+ @reflection.through_reflection.quoted_table_name,
+ composite_join_clause(full_keys(@reflection.table_name, reflection_primary_key), full_keys(@reflection.through_reflection.table_name, source_primary_key))
+ ]
+ end
+ end
+ alias_method_chain :construct_joins, :composite_keys
+ end
+end
projects / rails.git / blobdiff