From d916c62cfc7c59ab6411407a05b946d3dd7535e9 Mon Sep 17 00:00:00 2001 From: wycats Date: Sun, 9 May 2010 02:06:05 +0300 Subject: eliminate alias_method_chain from ActiveRecord --- activerecord/lib/active_record/base.rb | 331 +-------------------------------- 1 file changed, 2 insertions(+), 329 deletions(-) (limited to 'activerecord/lib/active_record/base.rb') diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 9ed53cc4af..650a91b385 100755 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -480,110 +480,6 @@ module ActiveRecord #:nodoc: connection.select_value(sql, "#{name} Count").to_i end - # Resets one or more counter caches to their correct value using an SQL - # count query. This is useful when adding new counter caches, or if the - # counter has been corrupted or modified directly by SQL. - # - # ==== Parameters - # - # * +id+ - The id of the object you wish to reset a counter on. - # * +counters+ - One or more counter names to reset - # - # ==== Examples - # - # # For Post with id #1 records reset the comments_count - # Post.reset_counters(1, :comments) - def reset_counters(id, *counters) - object = find(id) - counters.each do |association| - child_class = reflect_on_association(association).klass - counter_name = child_class.reflect_on_association(self.name.downcase.to_sym).counter_cache_column - - connection.update("UPDATE #{quoted_table_name} SET #{connection.quote_column_name(counter_name)} = #{object.send(association).count} WHERE #{connection.quote_column_name(primary_key)} = #{quote_value(object.id)}", "#{name} UPDATE") - end - end - - # A generic "counter updater" implementation, intended primarily to be - # used by increment_counter and decrement_counter, but which may also - # be useful on its own. It simply does a direct SQL update for the record - # with the given ID, altering the given hash of counters by the amount - # given by the corresponding value: - # - # ==== Parameters - # - # * +id+ - The id of the object you wish to update a counter on or an Array of ids. - # * +counters+ - An Array of Hashes containing the names of the fields - # to update as keys and the amount to update the field by as values. - # - # ==== Examples - # - # # For the Post with id of 5, decrement the comment_count by 1, and - # # increment the action_count by 1 - # Post.update_counters 5, :comment_count => -1, :action_count => 1 - # # Executes the following SQL: - # # UPDATE posts - # # SET comment_count = comment_count - 1, - # # action_count = action_count + 1 - # # WHERE id = 5 - # - # # For the Posts with id of 10 and 15, increment the comment_count by 1 - # Post.update_counters [10, 15], :comment_count => 1 - # # Executes the following SQL: - # # UPDATE posts - # # SET comment_count = comment_count + 1, - # # WHERE id IN (10, 15) - def update_counters(id, counters) - updates = counters.inject([]) { |list, (counter_name, increment)| - sign = increment < 0 ? "-" : "+" - list << "#{connection.quote_column_name(counter_name)} = COALESCE(#{connection.quote_column_name(counter_name)}, 0) #{sign} #{increment.abs}" - }.join(", ") - - if id.is_a?(Array) - ids_list = id.map {|i| quote_value(i)}.join(', ') - condition = "IN (#{ids_list})" - else - condition = "= #{quote_value(id)}" - end - - update_all(updates, "#{connection.quote_column_name(primary_key)} #{condition}") - end - - # Increment a number field by one, usually representing a count. - # - # This is used for caching aggregate values, so that they don't need to be computed every time. - # For example, a DiscussionBoard may cache post_count and comment_count otherwise every time the board is - # shown it would have to run an SQL query to find how many posts and comments there are. - # - # ==== Parameters - # - # * +counter_name+ - The name of the field that should be incremented. - # * +id+ - The id of the object that should be incremented. - # - # ==== Examples - # - # # Increment the post_count column for the record with an id of 5 - # DiscussionBoard.increment_counter(:post_count, 5) - def increment_counter(counter_name, id) - update_counters(id, counter_name => 1) - end - - # Decrement a number field by one, usually representing a count. - # - # This works the same as increment_counter but reduces the column value by 1 instead of increasing it. - # - # ==== Parameters - # - # * +counter_name+ - The name of the field that should be decremented. - # * +id+ - The id of the object that should be decremented. - # - # ==== Examples - # - # # Decrement the post_count column for the record with an id of 5 - # DiscussionBoard.decrement_counter(:post_count, 5) - def decrement_counter(counter_name, id) - update_counters(id, counter_name => -1) - end - # Attributes named in this macro are protected from mass-assignment, # such as new(attributes), # update_attributes(attributes), or @@ -1623,186 +1519,6 @@ module ActiveRecord #:nodoc: quote_value(id, column_for_attribute(self.class.primary_key)) end - # Returns true if this object hasn't been saved yet -- that is, a record for the object doesn't exist yet; otherwise, returns false. - def new_record? - @new_record - end - - # Returns true if this object has been destroyed, otherwise returns false. - def destroyed? - @destroyed - end - - # Returns if the record is persisted, i.e. it's not a new record and it was not destroyed. - def persisted? - !(new_record? || destroyed?) - end - - # :call-seq: - # save(options) - # - # Saves the model. - # - # If the model is new a record gets created in the database, otherwise - # the existing record gets updated. - # - # By default, save always run validations. If any of them fail the action - # is cancelled and +save+ returns +false+. However, if you supply - # :validate => false, validations are bypassed altogether. See - # ActiveRecord::Validations for more information. - # - # There's a series of callbacks associated with +save+. If any of the - # before_* callbacks return +false+ the action is cancelled and - # +save+ returns +false+. See ActiveRecord::Callbacks for further - # details. - def save - create_or_update - end - - # Saves the model. - # - # If the model is new a record gets created in the database, otherwise - # the existing record gets updated. - # - # With save! validations always run. If any of them fail - # ActiveRecord::RecordInvalid gets raised. See ActiveRecord::Validations - # for more information. - # - # There's a series of callbacks associated with save!. If any of - # the before_* callbacks return +false+ the action is cancelled - # and save! raises ActiveRecord::RecordNotSaved. See - # ActiveRecord::Callbacks for further details. - def save! - create_or_update || raise(RecordNotSaved) - end - - # Deletes the record in the database and freezes this instance to - # reflect that no changes should be made (since they can't be - # persisted). Returns the frozen instance. - # - # The row is simply removed with a SQL +DELETE+ statement on the - # record's primary key, and no callbacks are executed. - # - # To enforce the object's +before_destroy+ and +after_destroy+ - # callbacks, Observer methods, or any :dependent association - # options, use #destroy. - def delete - self.class.delete(id) if persisted? - @destroyed = true - freeze - end - - # Deletes the record in the database and freezes this instance to reflect that no changes should - # be made (since they can't be persisted). - def destroy - if persisted? - self.class.unscoped.where(self.class.arel_table[self.class.primary_key].eq(id)).delete_all - end - - @destroyed = true - freeze - end - - # Returns an instance of the specified +klass+ with the attributes of the current record. This is mostly useful in relation to - # single-table inheritance structures where you want a subclass to appear as the superclass. This can be used along with record - # identification in Action Pack to allow, say, Client < Company to do something like render :partial => @client.becomes(Company) - # to render that instance using the companies/company partial instead of clients/client. - # - # Note: The new instance will share a link to the same attributes as the original class. So any change to the attributes in either - # instance will affect the other. - def becomes(klass) - became = klass.new - became.instance_variable_set("@attributes", @attributes) - became.instance_variable_set("@attributes_cache", @attributes_cache) - became.instance_variable_set("@new_record", new_record?) - became.instance_variable_set("@destroyed", destroyed?) - became - end - - # Updates a single attribute and saves the record without going through the normal validation procedure. - # This is especially useful for boolean flags on existing records. The regular +update_attribute+ method - # in Base is replaced with this when the validations module is mixed in, which it is by default. - def update_attribute(name, value) - send("#{name}=", value) - save(:validate => false) - end - - # Updates all the attributes from the passed-in Hash and saves the record. If the object is invalid, the saving will - # fail and false will be returned. - def update_attributes(attributes) - self.attributes = attributes - save - end - - # Updates an object just like Base.update_attributes but calls save! instead of save so an exception is raised if the record is invalid. - def update_attributes!(attributes) - self.attributes = attributes - save! - end - - # Initializes +attribute+ to zero if +nil+ and adds the value passed as +by+ (default is 1). - # The increment is performed directly on the underlying attribute, no setter is invoked. - # Only makes sense for number-based attributes. Returns +self+. - def increment(attribute, by = 1) - self[attribute] ||= 0 - self[attribute] += by - self - end - - # Wrapper around +increment+ that saves the record. This method differs from - # its non-bang version in that it passes through the attribute setter. - # Saving is not subjected to validation checks. Returns +true+ if the - # record could be saved. - def increment!(attribute, by = 1) - increment(attribute, by).update_attribute(attribute, self[attribute]) - end - - # Initializes +attribute+ to zero if +nil+ and subtracts the value passed as +by+ (default is 1). - # The decrement is performed directly on the underlying attribute, no setter is invoked. - # Only makes sense for number-based attributes. Returns +self+. - def decrement(attribute, by = 1) - self[attribute] ||= 0 - self[attribute] -= by - self - end - - # Wrapper around +decrement+ that saves the record. This method differs from - # its non-bang version in that it passes through the attribute setter. - # Saving is not subjected to validation checks. Returns +true+ if the - # record could be saved. - def decrement!(attribute, by = 1) - decrement(attribute, by).update_attribute(attribute, self[attribute]) - end - - # Assigns to +attribute+ the boolean opposite of attribute?. So - # if the predicate returns +true+ the attribute will become +false+. This - # method toggles directly the underlying value without calling any setter. - # Returns +self+. - def toggle(attribute) - self[attribute] = !send("#{attribute}?") - self - end - - # Wrapper around +toggle+ that saves the record. This method differs from - # its non-bang version in that it passes through the attribute setter. - # Saving is not subjected to validation checks. Returns +true+ if the - # record could be saved. - def toggle!(attribute) - toggle(attribute).update_attribute(attribute, self[attribute]) - end - - # Reloads the attributes of this object from the database. - # The optional options argument is passed to find when reloading so you - # may do e.g. record.reload(:lock => true) to reload the same record with - # an exclusive row lock. - def reload(options = nil) - clear_aggregation_cache - clear_association_cache - @attributes.update(self.class.send(:with_exclusive_scope) { self.class.find(self.id, options) }.instance_variable_get('@attributes')) - @attributes_cache = {} - self - end - # Returns true if the given attribute is in the attributes hash def has_attribute?(attr_name) @attributes.has_key?(attr_name.to_s) @@ -1980,40 +1696,6 @@ module ActiveRecord #:nodoc: end private - def create_or_update - raise ReadOnlyRecord if readonly? - result = new_record? ? create : update - result != false - end - - # Updates the associated record with values matching those of the instance attributes. - # Returns the number of affected rows. - def update(attribute_names = @attributes.keys) - attributes_with_values = arel_attributes_values(false, false, attribute_names) - return 0 if attributes_with_values.empty? - self.class.unscoped.where(self.class.arel_table[self.class.primary_key].eq(id)).arel.update(attributes_with_values) - end - - # Creates a record with values matching those of the instance attributes - # and returns its id. - def create - if self.id.nil? && connection.prefetch_primary_key?(self.class.table_name) - self.id = connection.next_sequence_value(self.class.sequence_name) - end - - attributes_values = arel_attributes_values - - new_id = if attributes_values.empty? - self.class.unscoped.insert connection.empty_insert_statement_value - else - self.class.unscoped.insert attributes_values - end - - self.id ||= new_id - - @new_record = false - id - end # Sets the attribute used for single table inheritance to this class name if this is not the ActiveRecord::Base descendant. # Considering the hierarchy Reply < Message < ActiveRecord::Base, this makes it possible to do Reply.new without having to @@ -2099,17 +1781,6 @@ module ActiveRecord #:nodoc: instance_eval("%@#{sql.gsub('@', '\@')}@") end - # Initializes the attributes array with keys matching the columns from the linked table and - # the values matching the corresponding default value of that column, so - # that a new instance, or one populated from a passed-in Hash, still has all the attributes - # that instances loaded from the database would. - def attributes_from_column_definition - self.class.columns.inject({}) do |attributes, column| - attributes[column.name] = column.default unless column.name == self.class.primary_key - attributes - end - end - # Instantiates objects for all attribute classes that needs more than one constructor parameter. This is done # by calling new on the column type or aggregation type (through composed_of) object with these parameters. # So having the pairs written_on(1) = "2004", written_on(2) = "6", written_on(3) = "24", will instantiate @@ -2225,12 +1896,14 @@ module ActiveRecord #:nodoc: end Base.class_eval do + include ActiveRecord::Persistence extend ActiveModel::Naming extend QueryCache::ClassMethods extend ActiveSupport::Benchmarkable include ActiveModel::Conversion include Validations + extend CounterCache include Locking::Optimistic, Locking::Pessimistic include AttributeMethods include AttributeMethods::Read, AttributeMethods::Write, AttributeMethods::BeforeTypeCast, AttributeMethods::Query -- cgit v1.2.3