resolved - it would appear that MySQL treats an int of 0 = NULL. , so my first fixture (the root of the tree) which had an id of 0 in the fixtures file, was being taken as NULL (stated as not allowed in the table definition), so set to id=1 by MySQL, then causing the 2nd fixture (id=1 in the fixtures file) to appear as a duplicate.
On Mar 11, 2:51 pm, "steve.gooberman-hill" <steve.gooberman-h...@power- oasis.com> wrote: > Hi, > I've set up a model as follows > > class EquipmentPrice < ActiveRecord::Base > > acts_as_tree :order => "id" > > ... > end > > which has the following db migration > class CreateEquipmentPrices < ActiveRecord::Migration > def self.up > create_table :equipment_prices do |t| > t.integer :id > t.string :manufacturer > t.string :model > t.string :equipment_type > t.integer :capacity > t.integer :string_size > t.string :cost_structure > t.string :currency > t.decimal :price_each > t.decimal :price_bulk > t.integer :bulk_quantity > t.integer :parent_id > > t.timestamps > end > end > > def self.down > drop_table :equipment_prices > end > end > > But when I try and run the default test, I get an error message > stating > ActiveRecord::StatementInvalid: Mysql::Error: Duplicate entry '1' for > key 1: INSERT INTO `equipment_prices` (`id`, `manufacturer`, `model`, > `equipment_type`, `capacity`, `string_size`, `cost_structure`, > `currency`, `price_each`, `price_bulk`, `bulk_quantity`, `parent_id`, > `created_at`, `updated_at`) VALUES (1, NULL, NULL, 'PV_subsystem', > NULL, NULL, NULL, 'USD', 0.0, 0.0, 1, 0, '2010-03-11 12:14:05', > '2010-03-11 12:14:05') > > I have read in an earlier post that this is because I have parent_id > set as the primary key for the table. But when I look at the mysql > table definition I see > > mysql> describe equipment_prices; > +----------------+---------------+------+-----+--------- > +----------------+ > | Field | Type | Null | Key | Default | > Extra | > +----------------+---------------+------+-----+--------- > +----------------+ > | id | int(11) | NO | PRI | NULL | > auto_increment | > | manufacturer | varchar(255) | YES | | NULL > | | > | model | varchar(255) | YES | | NULL > | | > | equipment_type | varchar(255) | YES | | NULL > | | > | capacity | int(11) | YES | | NULL > | | > | string_size | int(11) | YES | | NULL > | | > | cost_structure | varchar(255) | YES | | NULL > | | > | currency | varchar(255) | YES | | NULL > | | > | price_each | decimal(10,0) | YES | | NULL > | | > | price_bulk | decimal(10,0) | YES | | NULL > | | > | bulk_quantity | int(11) | YES | | NULL > | | > | parent_id | int(11) | YES | | NULL > | | > | created_at | datetime | YES | | NULL > | | > | updated_at | datetime | YES | | NULL > | | > +----------------+---------------+------+-----+--------- > +----------------+ > 14 rows in set (0.00 sec) > > which appears to show that id is the primary key, as I would expect. > > What am I doing wrong here please? > > Thanks > > Steve -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
