I'm running a rails 2.3.5 / ruby 1.8.7 / postgresql 8.4.2 app and have
just run into a curious problem.
I have several tables that are initialized with data from csv files
and I've noticed that, when I try to add new data to any of these
tables via Table.new I get a PGError on duplicate key.
For example:
MIGRATION:
class CreateNumbers < ActiveRecord::Migration
def self.up
create_table :numbers do |t|
t.string :name
t.integer :value
t.timestamps
end
csv_file = "#{Rails.root}/db/migrate/numbers.csv"
fields = '(name, number)'
execute "COPY numbers from '#{csv_file}' DELIMITERS ',' CSV;"
end
def self.down
drop_table :numbers
end
end
CSVFILE:
1, "one", 1, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22 -0400
2010
2, "two", 2, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22 -0400
2010
3, "three", 3, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22
-0400 2010
4, "four", 4, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22
-0400 2010
5, "five", 5, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22
-0400 2010
6, "six", 6, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22 -0400
2010
7, "seven", 7, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22
-0400 2010
8, "eight", 8, Wed Apr 14 14:52:22 -0400 2010, Wed Apr 14 14:52:22
-0400 2010
Running db:migrate leaves me with a consistant Numbers table that I
can interract with through scripts/console except I can't
Number.create or n.save!.
Loading development environment (Rails 2.3.5)
>> Number.all.length
=> 8
>> Number.last
=> #<Number id: 8, name: " eight", value: 8, created_at: "2010-04-14
14:52:22", updated_at: "2010-04-14 14:52:22">
>> n = Number.new(:name => "nine", :value => 8)
=> #<Number id: nil, name: "nine", value: 8, created_at: nil,
updated_at: nil>
>> n
=> #<Number id: nil, name: "nine", value: 8, created_at: nil,
updated_at: nil>
>> n.save
ActiveRecord::StatementInvalid: PGError: ERROR: duplicate key value
violates unique constraint "numbers_pkey"
: INSERT INTO "numbers" ("name", "created_at", "updated_at", "value")
VALUES(E'nine', '2010-04-14 19:07:44.694130', '2010-04-14
19:07:44.694130', 8) RETURNING "id"
Any ideas?
thanks in advance
Rick
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