From 41bc3edcaa2159300e715cb23d680585539aefe8 Mon Sep 17 00:00:00 2001 From: Ryuta Kamizono Date: Sat, 3 Sep 2016 15:38:31 +0900 Subject: [PATCH] Decouple the building Arel ASTs for uniqueness validator Currently uniqueness validator is coupled with building Arel ASTs. This commit extracts `WhereClauseFactory#build_for_case_sensitive` for decouple the building Arel ASTs. --- .../connection_adapters/abstract_adapter.rb | 6 +-- .../abstract_mysql_adapter.rb | 2 +- .../relation/where_clause_factory.rb | 46 +++++++++++++++++-- .../active_record/validations/uniqueness.rb | 32 +------------ 4 files changed, 48 insertions(+), 38 deletions(-) diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 1badbb576d..cf3672b513 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -442,14 +442,14 @@ module ActiveRecord end def case_sensitive_comparison(table, attribute, column, value) - table[attribute].eq(Arel::Nodes::BindParam.new) + table[attribute].eq(value) end def case_insensitive_comparison(table, attribute, column, value) if can_perform_case_insensitive_comparison_for?(column) - table[attribute].lower.eq(table.lower(Arel::Nodes::BindParam.new)) + table[attribute].lower.eq(table.lower(value)) else - table[attribute].eq(Arel::Nodes::BindParam.new) + table[attribute].eq(value) end end diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index 68a88e71ba..dfea4a9632 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -615,7 +615,7 @@ module ActiveRecord def case_sensitive_comparison(table, attribute, column, value) if column.collation && !column.case_sensitive? - table[attribute].eq(Arel::Nodes::Bin.new(Arel::Nodes::BindParam.new)) + table[attribute].eq(Arel::Nodes::Bin.new(value)) else super end diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb index 737bc278bd..04bee73e8f 100644 --- a/activerecord/lib/active_record/relation/where_clause_factory.rb +++ b/activerecord/lib/active_record/relation/where_clause_factory.rb @@ -15,9 +15,12 @@ module ActiveRecord attributes = klass.send(:expand_hash_conditions_for_aggregates, attributes) attributes.stringify_keys! - attributes, binds = predicate_builder.create_binds(attributes) - - parts = predicate_builder.build_from_hash(attributes) + if perform_case_sensitive?(options = other.last) + parts, binds = build_for_case_sensitive(attributes, options) + else + attributes, binds = predicate_builder.create_binds(attributes) + parts = predicate_builder.build_from_hash(attributes) + end when Arel::Nodes::Node parts = [opts] else @@ -32,6 +35,43 @@ module ActiveRecord protected attr_reader :klass, :predicate_builder + + private + + def perform_case_sensitive?(options) + options && options.key?(:case_sensitive) + end + + def build_for_case_sensitive(attributes, options) + parts, binds = [], [] + table = klass.arel_table + + attributes.each do |attribute, value| + if reflection = klass._reflect_on_association(attribute) + attribute = reflection.foreign_key.to_s + value = value[reflection.klass.primary_key] unless value.nil? + end + + if value.nil? + parts << table[attribute].eq(value) + else + column = klass.column_for_attribute(attribute) + + binds << predicate_builder.send(:build_bind_param, attribute, value) + value = Arel::Nodes::BindParam.new + + predicate = if options[:case_sensitive] + klass.connection.case_sensitive_comparison(table, attribute, column, value) + else + klass.connection.case_insensitive_comparison(table, attribute, column, value) + end + + parts << predicate + end + end + + [parts, binds] + end end end end diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb index 453d7079ac..ae1ca9ed99 100644 --- a/activerecord/lib/active_record/validations/uniqueness.rb +++ b/activerecord/lib/active_record/validations/uniqueness.rb @@ -50,37 +50,7 @@ module ActiveRecord end def build_relation(klass, attribute, value) - if reflection = klass._reflect_on_association(attribute) - attribute = reflection.foreign_key - value = value.attributes[reflection.klass.primary_key] unless value.nil? - end - - if value.nil? - return klass.unscoped.where!(attribute => value) - end - - # the attribute may be an aliased attribute - if klass.attribute_alias?(attribute) - attribute = klass.attribute_alias(attribute) - end - - attribute_name = attribute.to_s - - table = klass.arel_table - column = klass.columns_hash[attribute_name] - cast_type = klass.type_for_attribute(attribute_name) - - comparison = if !options[:case_sensitive] - # will use SQL LOWER function before comparison, unless it detects a case insensitive collation - klass.connection.case_insensitive_comparison(table, attribute, column, value) - else - klass.connection.case_sensitive_comparison(table, attribute, column, value) - end - klass.unscoped.tap do |scope| - parts = [comparison] - binds = [Relation::QueryAttribute.new(attribute_name, value, cast_type)] - scope.where_clause += Relation::WhereClause.new(parts, binds) - end + klass.unscoped.where!({ attribute => value }, options) end def scope_relation(record, relation) # :doc: