Transaction is a reserved class in Rails.
-----
Ryan Bigg
Freelancer
http://frozenplague.net
On 14/12/2008, at 9:13 PM, Greg Hauptmann wrote:
> still stuck here
>
> When I create a new "allocation" model object, I check it is valid
> OK, but when I "save!" it I just get a "nil"? What would this
> imply. There's no error as such. It is true to say that I
> populated the non-null columns with relationship with ID's of just
> "1" (i.e. didn't ensure there was actually a matching record in
> their tables). Also the DB doesn't have foreign key constraints for
> these relationships. Questions here:
>
> Q1 - Does rails check to see that there is a valid object in an
> association present before allowing the save? (i.e. via the fact
> that the model has a "belongs_to" in it?
>
> Q2 - If it does do this check what would be the expected output from
> Rails the object wasn't there in the associated table (e.g. if one
> put manually a bad reference ID in)? Would it be "nil" as I got?
> There wouldn't be a more specific exception raised? especially if
> one is using the "save!" method?
>
>
> *** CONSOLE OUTPUT ***
> >> a = Allocation.new
> => #<Allocation id: nil, transaction_id: nil, person_id: nil,
> recurring_id: nil, amount: nil, amount_percent: nil, created_at:
> nil, updated_at: nil>
> >>
> ?> a.valid?
> => false
> >> a.amount = 1
> => 1
> >> a.transaction_id = 1
> => 1
> >> a.person_id = 1
> => 1
> >>
> ?> a.valid?
> => true
> >>
> ?>
> ?> a.save
> => nil
> >> a.save!
> => nil
>
> ** SQL FROM ./SCRIPT/SERVER WHEN I DID THE "a.save!" ***
> Transaction Columns (0.003291) SHOW FIELDS FROM `transactions`
> Transaction Load (0.001494) SELECT * FROM `transactions` WHERE
> (`transactions`.`id` = 1)
>
> ** Model code **
> #
>
> class Allocation < ActiveRecord::Base
> belongs_to :person
> belongs_to :transaction
>
> validates_numericality_of :amount, :if => :amount
> validates_numericality_of :amount_percent, :if => :amount_percent
>
> private
>
> def validate
> errors.add_to_base('amount and amount_percent can not both be
> specified') if amount && amount_percent
> errors.add_to_base('either amount OR amount_percent must be
> specified') if !amount && !amount_percent
> end
>
> end
>
>
>
>
> On Fri, Dec 12, 2008 at 5:09 PM, Greg Hauptmann
> <[email protected]
> > wrote:
> Hi,
>
> I have a model for which when I go to save an item it doesn't seem
> to get saved. In the console I don't get a "record not saved"
> error??? But rather the response seems to give me back a
> Transaction object (i.e. for which the saved Allocation object has a
> relationship with)? Any ideas why?
>
> CONSOLE OUTPUT
> ?> a = Allocation.new
> => #<Allocation id: nil, transaction_id: nil, person_id: nil,
> recurring_id: nil, amount: nil, amount_percent: nil, created_at:
> nil, updated_at: nil>
> >> a.valid?
> => false
> >> a.transaction_id = 1784
> => 1784
> >> a.person_id = 1
> => 1
> >> a.amount = 100
> => 100
> >> a.valid?
> => true
> >> a.save!
> => #<Transaction id: 1784, transaction_date: "2009-02-04",
> bank_account_id: 5, category_id: 6, recurring_id: 3, amount:
> #<BigDecimal:22291e0,'0.0',4(8)>, balance: #<BigDecimal:
> 2229190,'0.1E4',4(12)>, description: "food", notes: nil, created_at:
> "2008-12-08 21:21:17", updated_at: "2008-12-08 21:21:17",
> projection: true>
> >> a
> => #<Allocation id: nil, transaction_id: 1784, person_id: 1,
> recurring_id: nil, amount: #<BigDecimal:2218160,'0.1E3',4(8)>,
> amount_percent: nil, created_at: nil, updated_at: nil>
> >>
>
> MODEL
> -----------------------------------------------------------------------------------------------------------------------
> Macintosh-2:myequity greg$ cat app/models/allocation.rb
> # == Schema Information
> # Schema version: 20081128104846
> #
> # Table name: allocations
> #
> # id :integer(4) not null, primary key
> # transaction_id :integer(4) not null
> # person_id :integer(4) not null
> # recurring_id :integer(4)
> # amount :decimal(9, 2)
> # amount_percent :decimal(9, 2)
> # created_at :datetime
> # updated_at :datetime
> #
>
> class Allocation < ActiveRecord::Base
> belongs_to :person
> belongs_to :transaction
>
> validates_numericality_of :amount, :if => :amount
> validates_numericality_of :amount_percent, :if => :amount_percent
>
> private
>
> def validate
> errors.add_to_base('amount and amount_percent can not both be
> specified') if amount && amount_percent
> errors.add_to_base('either amount OR amount_percent must be
> specified') if !amount && !amount_percent
> end
>
> end
> -----------------------------------------------------------------------------------------------------------------------
>
>
>
>
> >
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