diff options
Diffstat (limited to 'activerecord/lib/active_record')
11 files changed, 95 insertions, 32 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index e52c2004f3..7c37132d3a 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -1276,7 +1276,7 @@ module ActiveRecord # Scope examples: # has_many :comments, -> { where(author_id: 1) } # has_many :employees, -> { joins(:address) } - # has_many :posts, ->(post) { where("max_post_length > ?", post.length) } + # has_many :posts, ->(blog) { where("max_post_length > ?", blog.max_post_length) } # # === Extensions # @@ -1443,7 +1443,7 @@ module ActiveRecord # Scope examples: # has_one :author, -> { where(comment_id: 1) } # has_one :employer, -> { joins(:company) } - # has_one :dob, ->(dob) { where("Date.new(2000, 01, 01) > ?", dob) } + # has_one :latest_post, ->(blog) { where("created_at > ?", blog.enabled_at) } # # === Options # @@ -1573,7 +1573,7 @@ module ActiveRecord # Scope examples: # belongs_to :firm, -> { where(id: 2) } # belongs_to :user, -> { joins(:friends) } - # belongs_to :level, ->(level) { where("game_level > ?", level.current) } + # belongs_to :level, ->(game) { where("game_level > ?", game.current_level) } # # === Options # @@ -1769,9 +1769,8 @@ module ActiveRecord # # Scope examples: # has_and_belongs_to_many :projects, -> { includes(:milestones, :manager) } - # has_and_belongs_to_many :categories, ->(category) { - # where("default_category = ?", category.name) - # } + # has_and_belongs_to_many :categories, ->(post) { + # where("default_category = ?", post.default_category) # # === Extensions # diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb index 607c54e481..ebe92e7878 100644 --- a/activerecord/lib/active_record/autosave_association.rb +++ b/activerecord/lib/active_record/autosave_association.rb @@ -389,7 +389,7 @@ module ActiveRecord autosave = reflection.options[:autosave] # reconstruct the scope now that we know the owner's id - association.reset_scope if association.respond_to?(:reset_scope) + association.reset_scope if records = associated_records_to_validate_or_save(association, @new_record_before_save, autosave) if autosave diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb index 8e71b60b29..ed652e26aa 100644 --- a/activerecord/lib/active_record/integration.rb +++ b/activerecord/lib/active_record/integration.rb @@ -13,6 +13,15 @@ module ActiveRecord # This is +:usec+, by default. class_attribute :cache_timestamp_format, instance_writer: false self.cache_timestamp_format = :usec + + ## + # :singleton-method: + # Indicates whether to use a stable #cache_key method that is accompanied + # by a changing version in the #cache_version method. + # + # This is +false+, by default until Rails 6.0. + class_attribute :cache_versioning, instance_writer: false + self.cache_versioning = false end # Returns a +String+, which Action Pack uses for constructing a URL to this @@ -52,25 +61,47 @@ module ActiveRecord # used to generate the key: # # Person.find(5).cache_key(:updated_at, :last_reviewed_at) + # + # If ActiveRecord::Base.cache_versioning is turned on, no version will be included + # in the cache key. The version will instead be supplied by #cache_version. This + # separation enables recycling of cache keys. + # + # Product.cache_versioning = true + # Product.new.cache_key # => "products/new" + # Person.find(5).cache_key # => "people/5" (even if updated_at available) def cache_key(*timestamp_names) if new_record? "#{model_name.cache_key}/new" else - timestamp = if timestamp_names.any? - max_updated_column_timestamp(timestamp_names) + if cache_version && timestamp_names.none? + "#{model_name.cache_key}/#{id}" else - max_updated_column_timestamp - end + timestamp = if timestamp_names.any? + max_updated_column_timestamp(timestamp_names) + else + max_updated_column_timestamp + end - if timestamp - timestamp = timestamp.utc.to_s(cache_timestamp_format) - "#{model_name.cache_key}/#{id}-#{timestamp}" - else - "#{model_name.cache_key}/#{id}" + if timestamp + timestamp = timestamp.utc.to_s(cache_timestamp_format) + "#{model_name.cache_key}/#{id}-#{timestamp}" + else + "#{model_name.cache_key}/#{id}" + end end end end + # Returns a cache version that can be used together with the cache key to form + # a recyclable caching scheme. By default, the #updated_at column is used for the + # cache_version, but this method can be overwritten to return something else. + # + # Note, this method will return nil if ActiveRecord::Base.cache_versioning is set to + # +false+ (which it is by default until Rails 6.0). + def cache_version + try(:updated_at).try(:to_i) if cache_versioning + end + module ClassMethods # Defines your model's +to_param+ method to generate "pretty" URLs # using +method_name+, which can be any attribute or method that diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index 5775eda5a5..333ad16e11 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -269,8 +269,7 @@ module ActiveRecord # Returns true if there are no records. def empty? return @records.empty? if loaded? - - limit_value == 0 || !exists? + !exists? end # Returns true if there are no records. diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index a1459c87c6..1d661fa8ed 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -307,9 +307,11 @@ module ActiveRecord MSG end - return false if !conditions + return false if !conditions || limit_value == 0 + + relation = self unless eager_loading? + relation ||= apply_join_dependency(self, construct_join_dependency(eager_loading: false)) - relation = apply_join_dependency(self, construct_join_dependency(eager_loading: false)) return false if ActiveRecord::NullRelation === relation relation = construct_relation_for_exists(relation, conditions) diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb index 1178dec706..76e529f2de 100644 --- a/activerecord/lib/active_record/relation/query_methods.rb +++ b/activerecord/lib/active_record/relation/query_methods.rb @@ -248,7 +248,7 @@ module ActiveRecord return super() end - raise ArgumentError, "Call this with at least one field" if fields.empty? + raise ArgumentError, "Call `select' with at least one field" if fields.empty? spawn._select!(*fields) end diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb index 94d63765c9..24b81aabc8 100644 --- a/activerecord/lib/active_record/schema_dumper.rb +++ b/activerecord/lib/active_record/schema_dumper.rb @@ -11,8 +11,8 @@ module ActiveRecord ## # :singleton-method: # A list of tables which should not be dumped to the schema. - # Acceptable values are strings as well as regexp. - # This setting is only used if ActiveRecord::Base.schema_format == :ruby + # Acceptable values are strings as well as regexp if ActiveRecord::Base.schema_format == :ruby. + # Only strings are accepted if ActiveRecord::Base.schema_format == :sql. cattr_accessor :ignore_tables @@ignore_tables = [] diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb index 45110a79cd..c53dee43d7 100644 --- a/activerecord/lib/active_record/tasks/database_tasks.rb +++ b/activerecord/lib/active_record/tasks/database_tasks.rb @@ -71,9 +71,9 @@ module ActiveRecord @tasks[pattern] = task end - register_task(/mysql/, ActiveRecord::Tasks::MySQLDatabaseTasks) - register_task(/postgresql/, ActiveRecord::Tasks::PostgreSQLDatabaseTasks) - register_task(/sqlite/, ActiveRecord::Tasks::SQLiteDatabaseTasks) + register_task(/mysql/, 'ActiveRecord::Tasks::MySQLDatabaseTasks') + register_task(/postgresql/, 'ActiveRecord::Tasks::PostgreSQLDatabaseTasks') + register_task(/sqlite/, 'ActiveRecord::Tasks::SQLiteDatabaseTasks') def db_dir @db_dir ||= Rails.application.config.paths["db"].first @@ -288,11 +288,11 @@ module ActiveRecord private def class_for_adapter(adapter) - key = @tasks.keys.detect { |pattern| adapter[pattern] } - unless key + _key, task = @tasks.each_pair.detect { |pattern, _task| adapter[pattern] } + unless task raise DatabaseNotSupported, "Rake tasks not supported by '#{adapter}' adapter" end - @tasks[key] + task.is_a?(String) ? task.constantize : task end def each_current_configuration(environment) diff --git a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb index c05f0a8fbb..541165b3d1 100644 --- a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb @@ -60,6 +60,12 @@ module ActiveRecord args.concat(["--routines"]) args.concat(["--skip-comments"]) args.concat(Array(extra_flags)) if extra_flags + + ignore_tables = ActiveRecord::SchemaDumper.ignore_tables + if ignore_tables.any? + args += ignore_tables.map { |table| "--ignore-table=#{configuration['database']}.#{table}" } + end + args.concat(["#{configuration['database']}"]) run_cmd("mysqldump", args, "dumping") diff --git a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb index f1af90c1e8..7f1a768d8b 100644 --- a/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/postgresql_database_tasks.rb @@ -66,6 +66,12 @@ module ActiveRecord "--schema=#{part.strip}" end end + + ignore_tables = ActiveRecord::SchemaDumper.ignore_tables + if ignore_tables.any? + args += ignore_tables.flat_map { |table| ["-T", table] } + end + args << configuration["database"] run_cmd("pg_dump", args, "dumping") remove_sql_header_comments(filename) diff --git a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb index 1f756c2979..7043d2f0c8 100644 --- a/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb +++ b/activerecord/lib/active_record/tasks/sqlite_database_tasks.rb @@ -36,9 +36,18 @@ module ActiveRecord end def structure_dump(filename, extra_flags) - dbfile = configuration["database"] - flags = extra_flags.join(" ") if extra_flags - `sqlite3 #{flags} #{dbfile} .schema > #{filename}` + args = [] + args.concat(Array(extra_flags)) if extra_flags + args << configuration["database"] + + ignore_tables = ActiveRecord::SchemaDumper.ignore_tables + if ignore_tables.any? + condition = ignore_tables.map { |table| connection.quote_table_name(table) }.join(", ") + args << "SELECT sql FROM sqlite_master WHERE tbl_name NOT IN (#{condition}) ORDER BY tbl_name, type DESC, name" + else + args << ".schema" + end + run_cmd("sqlite3", args, filename) end def structure_load(filename, extra_flags) @@ -56,6 +65,17 @@ module ActiveRecord def root @root end + + def run_cmd(cmd, args, out) + fail run_cmd_error(cmd, args) unless Kernel.system(cmd, *args, out: out) + end + + def run_cmd_error(cmd, args) + msg = "failed to execute:\n" + msg << "#{cmd} #{args.join(' ')}\n\n" + msg << "Please check the output above for any errors and make sure that `#{cmd}` is installed in your PATH and has proper permissions.\n\n" + msg + end end end end |