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 <
greg.hauptmann.r...@gmail.com> 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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