Hello,
I am having problem changing the primary key value of a table
using active record. I want to change the id of OriginalName from 2 to
6.
orders table:
+----+-------------------+----------------------------------
+---------------------------------+----------+
| id | name | address |
email | pay_type |
+----+-------------------+----------------------------------
+---------------------------------+----------+
| 1 | Reginald | 288 Escolta |
soa_dias-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc |
| 2 | OriginalName | 3421 unkonwn address | cust2-O5WfVfzUwx8@public.gmane.org
|
po |
| 3 | Third Eye | 3421 unkonwn address |
cust2-O5WfVfzUwx8@public.gmane.org
| po |
+----+--------------------+---------------------------------
+---------------------------------+----------+
What I did was to type the following on ruby script/console:
>> order=Order.find(2)
=> #<Order:0x4710184
@attributes={"name"=>"OriginalName",
"id"=>"2", "pay_type" >"po",
"address"=>"3421 unkonwn address",
"email"=>"cust2-O5WfVfzUwx8@public.gmane.org"}>
>> order.id
=> 2
>> order.id=6
=> 6
>> order.save
=> true
Although it displays a true message, there seems to be an
error.>>order
=> #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac
@errors={}, @base#<Order:0x4709500 ...>>, @new_record_before_save=nil,
@attributes={"name"=>"Orig
inalName", "id"=>6, "pay_type"=>"po",
"address"=>"3421 unkonwn
address", "email"
=>"cust2-O5WfVfzUwx8@public.gmane.org"}>
Moreover, when I queried the orders table using mysql, by typing
"select * from orders", I don''t see any changes.
P.S. I''m using Rails 1.2.2 and MySQL 5.0.27
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On 18 Jun 2008, at 10:59, soa_dias wrote:> > Hello, > > I am having problem changing the primary key value of a table > using active record. I want to change the id of OriginalName from 2 to > 6.Rails won''t do that for you like that. Order.update_all would probably handle it. (maybe Order.update too) Fred> > > orders table: > > +----+-------------------+---------------------------------- > +---------------------------------+----------+ > | id | name | address | > email | pay_type | > +----+-------------------+---------------------------------- > +---------------------------------+----------+ > | 1 | Reginald | 288 Escolta | > soa_dias-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc | > | 2 | OriginalName | 3421 unkonwn address | cust2-O5WfVfzUwx8@public.gmane.org | > po | > | 3 | Third Eye | 3421 unkonwn address | cust2-O5WfVfzUwx8@public.gmane.org > | po | > +----+--------------------+--------------------------------- > +---------------------------------+----------+ > > What I did was to type the following on ruby script/console: > >>> order=Order.find(2) > > => #<Order:0x4710184 @attributes={"name"=>"OriginalName", > "id"=>"2", "pay_type">> "po", "address"=>"3421 unkonwn address", > "email"=>"cust2-O5WfVfzUwx8@public.gmane.org"}> > >>> order.id > > => 2 > >>> order.id=6 > > => 6 > >>> order.save > > => true > > Although it displays a true message, there seems to be an error. >>> order > => #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac > @errors={}, @base> #<Order:0x4709500 ...>>, @new_record_before_save=nil, > @attributes={"name"=>"Orig > inalName", "id"=>6, "pay_type"=>"po", "address"=>"3421 unkonwn > address", "email" > =>"cust2-O5WfVfzUwx8@public.gmane.org"}> > > Moreover, when I queried the orders table using mysql, by typing > "select * from orders", I don''t see any changes. > > P.S. I''m using Rails 1.2.2 and MySQL 5.0.27 > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I think I might have the answer.
I believe the problem you are having is "when" you are changing the ID
value. I had to deal not long ago with the same problems you''re
facing.
In order to make it work I had to add a ''before_save'' method
in the
model:
def before_save
self.id = new_value_here
end
AR will disregard the changes you make to the ID value, probably
because it needs the original one for validations, etc. However, when
it is ready to save the data to the table (and the
''before_save''
method can be used) it does not need the ID any longer and is free for
you to change it.
I hope this helps.
On Jun 18, 4:59 am, soa_dias
<soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>
wrote:> Hello,
>
> I am having problem changing the primary key value of a table
> using active record. I want to change the id of OriginalName from 2 to
> 6.
>
> orders table:
>
> +----+-------------------+----------------------------------
> +---------------------------------+----------+
> | id | name | address |
> email | pay_type |
> +----+-------------------+----------------------------------
> +---------------------------------+----------+
> | 1 | Reginald | 288 Escolta |
> soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc |
> | 2 | OriginalName | 3421 unkonwn address |
cu...-O5WfVfzUwx8@public.gmane.org |
> po |
> | 3 | Third Eye | 3421 unkonwn address |
cu...-O5WfVfzUwx8@public.gmane.org
> | po |
> +----+--------------------+---------------------------------
> +---------------------------------+----------+
>
> What I did was to type the following on ruby script/console:
>
> >> order=Order.find(2)
>
> => #<Order:0x4710184
@attributes={"name"=>"OriginalName",
> "id"=>"2", "pay_type">
>"po", "address"=>"3421 unkonwn address",
> "email"=>"cu...-O5WfVfzUwx8@public.gmane.org"}>
>
> >> order.id
>
> => 2
>
> >> order.id=6
>
> => 6
>
> >> order.save
>
> => true
>
> Although it displays a true message, there seems to be an
error.>>order
>
> => #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac
> @errors={}, @base> #<Order:0x4709500 ...>>,
@new_record_before_save=nil,
> @attributes={"name"=>"Orig
> inalName", "id"=>6,
"pay_type"=>"po", "address"=>"3421
unkonwn
> address", "email"
> =>"cu...-O5WfVfzUwx8@public.gmane.org"}>
>
> Moreover, when I queried the orders table using mysql, by typing
> "select * from orders", I don''t see any changes.
>
> P.S. I''m using Rails 1.2.2 and MySQL 5.0.27
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Excellent. Order.update_all allowed me to change the primary key value, thanks a lot. Order.update doesn''t work though, but that''s alright :) On Jun 18, 6:33 pm, Frederick Cheung <frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On 18 Jun 2008, at 10:59, soa_dias wrote: > > > > > Hello, > > > I am having problem changing the primary key value of a table > > using active record. I want to change the id of OriginalName from 2 to > > 6. > > Rails won''t do that for you like that. Order.update_all would probably > handle it. (maybe Order.update too) > > Fred > > > > > orders table: > > > +----+-------------------+---------------------------------- > > +---------------------------------+----------+ > > | id | name | address | > > email | pay_type | > > +----+-------------------+---------------------------------- > > +---------------------------------+----------+ > > | 1 | Reginald | 288 Escolta | > > soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc | > > | 2 | OriginalName | 3421 unkonwn address | cu...-O5WfVfzUwx8@public.gmane.org | > > po | > > | 3 | Third Eye | 3421 unkonwn address | cu...-O5WfVfzUwx8@public.gmane.org > > | po | > > +----+--------------------+--------------------------------- > > +---------------------------------+----------+ > > > What I did was to type the following on ruby script/console: > > >>> order=Order.find(2) > > > => #<Order:0x4710184 @attributes={"name"=>"OriginalName", > > "id"=>"2", "pay_type"> >> "po", "address"=>"3421 unkonwn address", > > "email"=>"cu...-O5WfVfzUwx8@public.gmane.org"}> > > >>> order.id > > > => 2 > > >>> order.id=6 > > > => 6 > > >>> order.save > > > => true > > > Although it displays a true message, there seems to be an error. > >>> order > > => #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac > > @errors={}, @base> > #<Order:0x4709500 ...>>, @new_record_before_save=nil, > > @attributes={"name"=>"Orig > > inalName", "id"=>6, "pay_type"=>"po", "address"=>"3421 unkonwn > > address", "email" > > =>"cu...-O5WfVfzUwx8@public.gmane.org"}> > > > Moreover, when I queried the orders table using mysql, by typing > > "select * from orders", I don''t see any changes. > > > P.S. I''m using Rails 1.2.2 and MySQL 5.0.27--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Thanks for your input, but I couldn''t get your method to work, perhaps
I was doing it wrong. I added the following to the Order model:
def before_save(new_value)
self.id = new_value
end
Then, I fired up script/console. typed the following:
order = Order.find(2)
order.before_save(6)
order.save
After which an error would occur:
ArgumentError: wrong number of arguments (0 for 1)
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/callbacks.rb:348:in `before_save''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/callbacks.rb:348:in `send''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/callbacks.rb:348:in `callback''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/callbacks.rb:241:in `create_or_update''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/base.rb:1552:in `save_without_validation!''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/validations.rb:762:in `save_without_transactions!''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/transactions.rb:133:in `save!''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/connection_adapters/abstract/database_statements.rb:
59:in `transa
ction''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/transactions.rb:95:in `transaction''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/transactions.rb:121:in `transaction''
from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/
activerecord-1.15.2/lib
/active_record/transactions.rb:133:in `save!''
from (irb):20
On Jun 18, 10:20 pm, pepe <P...-gUAqH5+0sKL6V6G2DxALlg@public.gmane.org>
wrote:> I think I might have the answer.
>
> I believe the problem you are having is "when" you are changing
the ID
> value. I had to deal not long ago with the same problems you''re
> facing.
>
> In order to make it work I had to add a ''before_save''
method in the
> model:
>
> def before_save
> self.id = new_value_here
> end
>
> AR will disregard the changes you make to the ID value, probably
> because it needs the original one for validations, etc. However, when
> it is ready to save the data to the table (and the
''before_save''
> method can be used) it does not need the ID any longer and is free for
> you to change it.
>
> I hope this helps.
>
> On Jun 18, 4:59 am, soa_dias
<soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hello,
>
> > I am having problem changing the primary key value of a table
> > using active record. I want to change the id of OriginalName from 2 to
> > 6.
>
> > orders table:
>
> > +----+-------------------+----------------------------------
> > +---------------------------------+----------+
> > | id | name | address |
> > email | pay_type |
> > +----+-------------------+----------------------------------
> > +---------------------------------+----------+
> > | 1 | Reginald | 288 Escolta |
> > soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc |
> > | 2 | OriginalName | 3421 unkonwn address |
cu...-O5WfVfzUwx8@public.gmane.org |
> > po |
> > | 3 | Third Eye | 3421 unkonwn address |
cu...-O5WfVfzUwx8@public.gmane.org
> > | po |
> > +----+--------------------+---------------------------------
> > +---------------------------------+----------+
>
> > What I did was to type the following on ruby script/console:
>
> > >> order=Order.find(2)
>
> > => #<Order:0x4710184
@attributes={"name"=>"OriginalName",
> > "id"=>"2", "pay_type"> >
>"po", "address"=>"3421 unkonwn address",
> >
"email"=>"cu...-O5WfVfzUwx8@public.gmane.org"}>
>
> > >> order.id
>
> > => 2
>
> > >> order.id=6
>
> > => 6
>
> > >> order.save
>
> > => true
>
> > Although it displays a true message, there seems to be an
error.>>order
>
> > => #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac
> > @errors={}, @base> > #<Order:0x4709500 ...>>,
@new_record_before_save=nil,
> > @attributes={"name"=>"Orig
> > inalName", "id"=>6,
"pay_type"=>"po", "address"=>"3421
unkonwn
> > address", "email"
> > =>"cu...-O5WfVfzUwx8@public.gmane.org"}>
>
> > Moreover, when I queried the orders table using mysql, by typing
> > "select * from orders", I don''t see any changes.
>
> > P.S. I''m using Rails 1.2.2 and MySQL 5.0.27
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Hello again. The reason why the method would not work is because the method is a ''callback'' method. I don''t believe it accepts parameters. A callback method is automatically called by Rails when you call the ''save'' method (order.save in this case). This callback method, if declared, is called for you by Rails before the record is actually saved to the DB: you do: order.save Rails does: order.before_save then it saves the record You would need to have a way of knowing the new value for ID from within before_save, like storing it in an instance variable before you invoke order.save: in your code: order.new_value = 6 order.save def before_save self.id = self.new_value end Although you already got the problem solved I would still try this. It might help in the future. Good luck. Pepe On Jun 18, 11:19 pm, soa_dias <soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:> Thanks for your input, but I couldn''t get your method to work, perhaps > I was doing it wrong. I added the following to the Order model: > > def before_save(new_value) > self.id = new_value > end > > Then, I fired up script/console. typed the following: > order = Order.find(2) > order.before_save(6) > order.save > > After which an error would occur: > > ArgumentError: wrong number of arguments (0 for 1) > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/callbacks.rb:348:in `before_save'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/callbacks.rb:348:in `send'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/callbacks.rb:348:in `callback'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/callbacks.rb:241:in `create_or_update'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/base.rb:1552:in `save_without_validation!'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/validations.rb:762:in `save_without_transactions!'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/transactions.rb:133:in `save!'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/connection_adapters/abstract/database_statements.rb: > 59:in `transa > ction'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/transactions.rb:95:in `transaction'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/transactions.rb:121:in `transaction'' > from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/ > activerecord-1.15.2/lib > /active_record/transactions.rb:133:in `save!'' > from (irb):20 > > On Jun 18, 10:20 pm, pepe <P...-gUAqH5+0sKL6V6G2DxALlg@public.gmane.org> wrote: > > > I think I might have the answer. > > > I believe the problem you are having is "when" you are changing the ID > > value. I had to deal not long ago with the same problems you''re > > facing. > > > In order to make it work I had to add a ''before_save'' method in the > > model: > > > def before_save > > self.id = new_value_here > > end > > > AR will disregard the changes you make to the ID value, probably > > because it needs the original one for validations, etc. However, when > > it is ready to save the data to the table (and the ''before_save'' > > method can be used) it does not need the ID any longer and is free for > > you to change it. > > > I hope this helps. > > > On Jun 18, 4:59 am, soa_dias <soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote: > > > > Hello, > > > > I am having problem changing the primary key value of a table > > > using active record. I want to change the id of OriginalName from 2 to > > > 6. > > > > orders table: > > > > +----+-------------------+---------------------------------- > > > +---------------------------------+----------+ > > > | id | name | address | > > > email | pay_type | > > > +----+-------------------+---------------------------------- > > > +---------------------------------+----------+ > > > | 1 | Reginald | 288 Escolta | > > > soa_d...-/E1597aS9LQAvxtiuMwx3w@public.gmane.org | cc | > > > | 2 | OriginalName | 3421 unkonwn address | cu...-O5WfVfzUwx8@public.gmane.org | > > > po | > > > | 3 | Third Eye | 3421 unkonwn address | cu...-O5WfVfzUwx8@public.gmane.org > > > | po | > > > +----+--------------------+--------------------------------- > > > +---------------------------------+----------+ > > > > What I did was to type the following on ruby script/console: > > > > >> order=Order.find(2) > > > > => #<Order:0x4710184 @attributes={"name"=>"OriginalName", > > > "id"=>"2", "pay_type"> > > >"po", "address"=>"3421 unkonwn address", > > > "email"=>"cu...-O5WfVfzUwx8@public.gmane.org"}> > > > > >> order.id > > > > => 2 > > > > >> order.id=6 > > > > => 6 > > > > >> order.save > > > > => true > > > > Although it displays a true message, there seems to be an error.>>order > > > > => #<Order:0x4709500 @errors=#<ActiveRecord::Errors:0x4705cac > > > @errors={}, @base> > > #<Order:0x4709500 ...>>, @new_record_before_save=nil, > > > @attributes={"name"=>"Orig > > > inalName", "id"=>6, "pay_type"=>"po", "address"=>"3421 unkonwn > > > address", "email" > > > =>"cu...-O5WfVfzUwx8@public.gmane.org"}> > > > > Moreover, when I queried the orders table using mysql, by typing > > > "select * from orders", I don''t see any changes. > > > > P.S. I''m using Rails 1.2.2 and MySQL 5.0.27--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---