diff options
Diffstat (limited to 'activerecord/lib/active_record/base.rb')
| -rwxr-xr-x | activerecord/lib/active_record/base.rb | 200 |
1 files changed, 22 insertions, 178 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 318bfbe826..52587ef251 100755 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -11,174 +11,12 @@ require 'active_support/core_ext/hash/deep_merge' require 'active_support/core_ext/hash/indifferent_access' require 'active_support/core_ext/hash/slice' require 'active_support/core_ext/string/behavior' -require 'active_support/core_ext/object/metaclass' +require 'active_support/core_ext/object/singleton_class' require 'active_support/core_ext/module/delegation' +require 'arel' +require 'active_record/errors' module ActiveRecord #:nodoc: - # Generic Active Record exception class. - class ActiveRecordError < StandardError - end - - # Raised when the single-table inheritance mechanism fails to locate the subclass - # (for example due to improper usage of column that +inheritance_column+ points to). - class SubclassNotFound < ActiveRecordError #:nodoc: - end - - # Raised when an object assigned to an association has an incorrect type. - # - # class Ticket < ActiveRecord::Base - # has_many :patches - # end - # - # class Patch < ActiveRecord::Base - # belongs_to :ticket - # end - # - # # Comments are not patches, this assignment raises AssociationTypeMismatch. - # @ticket.patches << Comment.new(:content => "Please attach tests to your patch.") - class AssociationTypeMismatch < ActiveRecordError - end - - # Raised when unserialized object's type mismatches one specified for serializable field. - class SerializationTypeMismatch < ActiveRecordError - end - - # Raised when adapter not specified on connection (or configuration file <tt>config/database.yml</tt> misses adapter field). - class AdapterNotSpecified < ActiveRecordError - end - - # Raised when Active Record cannot find database adapter specified in <tt>config/database.yml</tt> or programmatically. - class AdapterNotFound < ActiveRecordError - end - - # Raised when connection to the database could not been established (for example when <tt>connection=</tt> is given a nil object). - class ConnectionNotEstablished < ActiveRecordError - end - - # Raised when Active Record cannot find record by given id or set of ids. - class RecordNotFound < ActiveRecordError - end - - # Raised by ActiveRecord::Base.save! and ActiveRecord::Base.create! methods when record cannot be - # saved because record is invalid. - class RecordNotSaved < ActiveRecordError - end - - # Raised when SQL statement cannot be executed by the database (for example, it's often the case for MySQL when Ruby driver used is too old). - class StatementInvalid < ActiveRecordError - end - - # Raised when SQL statement is invalid and the application gets a blank result. - class ThrowResult < ActiveRecordError - end - - # Parent class for all specific exceptions which wrap database driver exceptions - # provides access to the original exception also. - class WrappedDatabaseException < StatementInvalid - attr_reader :original_exception - - def initialize(message, original_exception) - super(message) - @original_exception = original_exception - end - end - - # Raised when a record cannot be inserted because it would violate a uniqueness constraint. - class RecordNotUnique < WrappedDatabaseException - end - - # Raised when a record cannot be inserted or updated because it references a non-existent record. - class InvalidForeignKey < WrappedDatabaseException - end - - # Raised when number of bind variables in statement given to <tt>:condition</tt> key (for example, when using +find+ method) - # does not match number of expected variables. - # - # For example, in - # - # Location.find :all, :conditions => ["lat = ? AND lng = ?", 53.7362] - # - # two placeholders are given but only one variable to fill them. - class PreparedStatementInvalid < ActiveRecordError - end - - # Raised on attempt to save stale record. Record is stale when it's being saved in another query after - # instantiation, for example, when two users edit the same wiki page and one starts editing and saves - # the page before the other. - # - # Read more about optimistic locking in ActiveRecord::Locking module RDoc. - class StaleObjectError < ActiveRecordError - end - - # Raised when association is being configured improperly or - # user tries to use offset and limit together with has_many or has_and_belongs_to_many associations. - class ConfigurationError < ActiveRecordError - end - - # Raised on attempt to update record that is instantiated as read only. - class ReadOnlyRecord < ActiveRecordError - end - - # <tt>ActiveRecord::Transactions::ClassMethods.transaction</tt> uses this exception - # to distinguish a deliberate rollback from other exceptional situations. - # Normally, raising an exception will cause the +transaction+ method to rollback - # the database transaction *and* pass on the exception. But if you raise an - # <tt>ActiveRecord::Rollback</tt> exception, then the database transaction will be rolled back, - # without passing on the exception. - # - # For example, you could do this in your controller to rollback a transaction: - # - # class BooksController < ActionController::Base - # def create - # Book.transaction do - # book = Book.new(params[:book]) - # book.save! - # if today_is_friday? - # # The system must fail on Friday so that our support department - # # won't be out of job. We silently rollback this transaction - # # without telling the user. - # raise ActiveRecord::Rollback, "Call tech support!" - # end - # end - # # ActiveRecord::Rollback is the only exception that won't be passed on - # # by ActiveRecord::Base.transaction, so this line will still be reached - # # even on Friday. - # redirect_to root_url - # end - # end - class Rollback < ActiveRecordError - end - - # Raised when attribute has a name reserved by Active Record (when attribute has name of one of Active Record instance methods). - class DangerousAttributeError < ActiveRecordError - end - - # Raised when unknown attributes are supplied via mass assignment. - class UnknownAttributeError < NoMethodError - end - - # Raised when an error occurred while doing a mass assignment to an attribute through the - # <tt>attributes=</tt> method. The exception has an +attribute+ property that is the name of the - # offending attribute. - class AttributeAssignmentError < ActiveRecordError - attr_reader :exception, :attribute - def initialize(message, exception, attribute) - @exception = exception - @attribute = attribute - @message = message - end - end - - # Raised when there are multiple errors while doing a mass assignment through the +attributes+ - # method. The exception has an +errors+ property that contains an array of AttributeAssignmentError - # objects, each corresponding to the error while assigning to an attribute. - class MultiparameterAssignmentErrors < ActiveRecordError - attr_reader :errors - def initialize(errors) - @errors = errors - end - end - # Active Record objects don't specify their attributes directly, but rather infer them from the table definition with # which they're linked. Adding, removing, and changing attributes and their type is done directly in the database. Any change # is instantly reflected in the Active Record objects. The mapping that binds a given Active Record class to a certain @@ -551,8 +389,8 @@ module ActiveRecord #:nodoc: class << self # Class methods def colorize_logging(*args) ActiveSupport::Deprecation.warn "ActiveRecord::Base.colorize_logging and " << - "config.active_record.colorize_logging are deprecated. Please use " << - "Rails::Subscriber.colorize_logging or config.colorize_logging instead", caller + "config.active_record.colorize_logging are deprecated. Please use " << + "Rails::LogSubscriber.colorize_logging or config.colorize_logging instead", caller end alias :colorize_logging= :colorize_logging @@ -1669,12 +1507,12 @@ module ActiveRecord #:nodoc: @attributes_cache = {} @new_record = true ensure_proper_type - self.attributes = attributes unless attributes.nil? if scope = self.class.send(:current_scoped_methods) create_with = scope.scope_for_create create_with.each { |att,value| self.send("#{att}=", value) } if create_with end + self.attributes = attributes unless attributes.nil? result = yield self if block_given? _run_initialize_callbacks @@ -1767,6 +1605,11 @@ module ActiveRecord #:nodoc: @destroyed || false 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) # @@ -1816,7 +1659,7 @@ module ActiveRecord #:nodoc: # callbacks, Observer methods, or any <tt>:dependent</tt> association # options, use <tt>#destroy</tt>. def delete - self.class.delete(id) unless new_record? + self.class.delete(id) if persisted? @destroyed = true freeze end @@ -1824,7 +1667,7 @@ module ActiveRecord #:nodoc: # 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 - unless new_record? + if persisted? self.class.unscoped.where(self.class.arel_table[self.class.primary_key].eq(id)).delete_all end @@ -1844,6 +1687,7 @@ module ActiveRecord #:nodoc: 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 @@ -1926,7 +1770,7 @@ module ActiveRecord #:nodoc: def reload(options = nil) clear_aggregation_cache clear_association_cache - @attributes.update(self.class.find(self.id, options).instance_variable_get('@attributes')) + @attributes.update(self.class.send(:with_exclusive_scope) { self.class.find(self.id, options) }.instance_variable_get('@attributes')) @attributes_cache = {} self end @@ -1995,10 +1839,9 @@ module ActiveRecord #:nodoc: # Returns a hash of all the attributes with their names as keys and the values of the attributes as values. def attributes - self.attribute_names.inject({}) do |attrs, name| - attrs[name] = read_attribute(name) - attrs - end + attrs = {} + attribute_names.each { |name| attrs[name] = read_attribute(name) } + attrs end # Returns an <tt>#inspect</tt>-like string for the value of the @@ -2042,8 +1885,7 @@ module ActiveRecord #:nodoc: def ==(comparison_object) comparison_object.equal?(self) || (comparison_object.instance_of?(self.class) && - comparison_object.id == id && - !comparison_object.new_record?) + comparison_object.id == id && !comparison_object.new_record?) end # Delegates to == @@ -2343,7 +2185,7 @@ module ActiveRecord #:nodoc: # Returns a comma-separated pair list, like "key1 = val1, key2 = val2". def comma_pair_list(hash) - hash.inject([]) { |list, pair| list << "#{pair.first} = #{pair.last}" }.join(", ") + hash.map { |k,v| "#{k} = #{v}" }.join(", ") end def quote_columns(quoter, hash) @@ -2397,8 +2239,10 @@ module ActiveRecord #:nodoc: include Aggregations, Transactions, Reflection, Serialization + NilClass.add_whiner(self) if NilClass.respond_to?(:add_whiner) end end # TODO: Remove this and make it work with LAZY flag require 'active_record/connection_adapters/abstract_adapter' +ActiveRecord.run_base_hooks(ActiveRecord::Base)
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