Upgrade to Rails 2 - problem with "save" (MySQL boolean issue?)


#1

I have been working through an upgrade of my 1.2.6 application to
2.2.2.

I am almost there but I have hit a problem with ActiveRecord.

Before the upgrade, the following code was working fine.

def create_root(administrator)
    root = create_root_collection(self.pingee_name,
                                  administrator,
                                  GlobalAccessibility.new,
                                  OwnerAccessibility.new)
    root.save
    self.root = root
end

But now I get am getting an exception “undefined method `each’ for
true:TrueClass” when root.save is executed.

fyi, the “create_root_collection” method creates a “root” object and
assigns new object to its “belongs to” association.

I have traced it through carefully and it is definitely failing when
trying to save the “root” object itself.

Given the error message, and the fact that the root object contains
boolean columns, I wonder if the problem is to do with the saving
boolean values. I am using MySQL and declaring the boolean columns in
the following way (using raw SQL not migrations currently):

include_parent_responses boolean default false not null,

Is the “boolean” column type still valid?

Thanks!


#2

To add, I am seeing the following when I retrieve an existing Root
object in the Rails console and then try to save it again:

=> #<Root id: 1, type: “Root”, name: “Base of Administrator”,
yaml_container: nil, parent_id: nil, owner_id: 1, custodian_id: 1,
property_control_id: 1, include_parent_responses: false, inheritable:
false, response_vehicle_id: nil, acquire_child_values: false,
description: nil, rating: nil, link_base_id: nil, base_image_id: nil,
event_when_id: nil, event_description_id: nil>

root.save
NoMethodError: undefined method each' for true:TrueClass from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2808:inattributes_with_quotes’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
base.rb:2706:in update_without_lock' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ locking/optimistic.rb:70:inupdate_without_dirty’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
dirty.rb:146:in update_without_callbacks' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ callbacks.rb:253:inupdate_without_timestamps’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
timestamp.rb:38:in update' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2699:increate_or_update_without_callbacks’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
callbacks.rb:222:in create_or_update' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2383:insave_without_validation’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
validations.rb:1009:in save_without_dirty' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ dirty.rb:79:insave_without_transactions’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:179:in send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:179:inwith_transaction_returning_status’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
connection_adapters/abstract/database_statements.rb:66:in
transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:129:intransaction’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:138:in transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:178:inwith_transaction_returning_status’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:146:in save' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:158:inrollback_active_record_state!’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:146:in `save’

Any thoughts much appreciated.

On 20 Dec, 06:54, “removed_email_address@domain.invalid”


#3

On Dec 20, 1:52 pm, “removed_email_address@domain.invalid”
removed_email_address@domain.invalid wrote:

To add, I am seeing the following when I retrieve an existing Root
object in the Rails console and then try to save it again:

My guess would be that you have a method or an association with a name
that has since been used internally by activerecord. If you can show
more of your model someone might be able to spot the troublemaker.

Fred


#4

On 23 Dec 2008, at 14:04, removed_email_address@domain.invalid wrote:

I have checked for method/association name clashes and can’t see any.
Any tips on how I might debug this further would be very much
appreciated - I am completely stuck!

You could start by showing the code in your model. If you’ve got any
plugins you’re using it’s worth making sure they aren’t the problem

Fred


#5

I have checked for method/association name clashes and can’t see any.
Any tips on how I might debug this further would be very much
appreciated - I am completely stuck!

To recap, I am getting the error “undefined method `each’ for
true:TrueClass” when an Active Record method (in active_record/base.rb

  • see below) is being executed. So I assume ‘attribute_names’ is being
    set to true for some reason.

    # Returns a copy of the attributes hash where all the values
    

have been safely quoted for use in
# an SQL statement.
def attributes_with_quotes(include_primary_key = true,
include_readonly_attributes = true, attribute_names =
@attributes.keys)
quoted = {}
connection = self.class.connection
attribute_names.each do |name|
if (column = column_for_attribute(name)) &&
(include_primary_key || !column.primary)
value = read_attribute(name)

        # We need explicit to_yaml because quote() does not

properly convert Time/Date fields to YAML.
if value && self.class.serialized_attributes.has_key?
(name) && (value.acts_like?(:date) || value.acts_like?(:time))
value = value.to_yaml
end

        quoted[name] = connection.quote(value, column)
      end
    end
    include_readonly_attributes ? quoted :

remove_readonly_attributes(quoted)
end


#6

I’m not sure which model is causing the problem. I am now trapping
exceptions and the error first occurs when I execute root.save (see
1). ‘root’ is an instance of my Property model. I also get the
same error when executing code *** 2 *** (which follows the execution
of *** 1 ***) - member.save forces another (different) instance of
Property to be saved to the properties table which again triggers the
same error. FYI ‘member.create_default_characteristics(user)’ (in ***
2 ) calls create_root() ( 1 ***). The log file also suggests
that both errors are raised on an INSERT into my properties table.

*** 1 ***

def create_root(administrator)
    begin
    root = create_root_collection(self.pingee_name,
                                  administrator,
                                  GlobalAccessibility.new,
                                  OwnerAccessibility.new)
    root.save
    rescue Exception => exe
      logger.info("*** Member.create_root #{exe} #{root.name.to_s}

***")
end
self.root = root
end

*** 2 ***
def self.add_member_for_user(user)
member = new(:user_id => user.id, :pingee_name =>
user.pingee_name)
# Create the member’s default characteristics and save it all
to the database in a single
# transaction
begin
transaction do
member.create_default_characteristics(user)
member.save!
end
member
rescue Exception => exe
logger.info("*** Member.add_member_for_user #{exe} ***")
end
end


#7

On 23 Dec 2008, at 15:44, removed_email_address@domain.invalid wrote:

I’m not sure which model is causing the problem. I am now trapping

It would be the model being saved/created. A method called changed
would cause a problem for example.

Fred


#8

Fred,

I do have a “changed” method!

#
# Typically used by "set" accessors to indicate that an attribute

of this object has been changed.
#
def changed
@has_changed = true
end

Why would this cause a problem?

On 23 Dec, 16:37, “removed_email_address@domain.invalid”


#9

Fred,

I’ll look for “changed”.

I can re-create the error in the console - please see below. The error
would suggest that attribute_names in attributes_with_quotes is set to
true though as you can see the ‘attributes.keys’ for the instance
being saved seems ok.

*** CONSOLE OUTPUT - r, an existing Root object in the DB, raises an
error when I try to save it back
r = Property.find(1)
=> #<Root id: 1, type: “Root”, name: “Base of Administrator”,
yaml_container: nil, parent_id: nil, owner_id: 1, custodian_id: 1,
property_control_id: 1, include_parent_responses: false, inheritable:
false, response_vehicle_id: nil, acquire_child_values: false,
description: nil, rating: nil, link_base_id: nil, base_image_id: nil,
event_when_id: nil, event_description_id: nil>

r.save
NoMethodError: undefined method each' for true:TrueClass from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2808:inattributes_with_quotes’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
base.rb:2706:in update_without_lock' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ locking/optimistic.rb:70:inupdate_without_dirty’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
dirty.rb:146:in update_without_callbacks' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ callbacks.rb:253:inupdate_without_timestamps’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
timestamp.rb:38:in update' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2699:increate_or_update_without_callbacks’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
callbacks.rb:222:in create_or_update' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ base.rb:2383:insave_without_validation’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
validations.rb:1009:in save_without_dirty' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ dirty.rb:79:insave_without_transactions’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:179:in send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:179:inwith_transaction_returning_status’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
connection_adapters/abstract/database_statements.rb:66:in
transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:129:intransaction’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:138:in transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:178:inwith_transaction_returning_status’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:146:in save' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/ transactions.rb:158:inrollback_active_record_state!’
from /usr/lib/ruby/gems/1.8/gems/activerecord-2.2.2/lib/active_record/
transactions.rb:146:in `save’
from (irb):24
from :0>> r.attributes.keys
=> [“rating”, “property_control_id”, “name”, “yaml_container”,
“event_description_id”, “type”, “response_vehicle_id”, “id”,
“event_when_id”, “custodian_id”, “description”, “base_image_id”,
“owner_id”, “acquire_child_values”, “link_base_id”, “parent_id”,
“include_parent_responses”, “inheritable”]


#10

On 23 Dec 2008, at 16:43, removed_email_address@domain.invalid wrote:

   @has_changed = true

end

Why would this cause a problem?

Because in rails 2.1 there is a changed method that returns the list
of attributes that have changed (and thus need to be saved). You’re
overwriting that method.

Fred