mysql - Adding defaults to integer columns, error saying 'right sytnax near 'default-1 default null' -

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i have column named 'parent_id' trying add default of -1 to:

change_column  :categories, :parent_id, :default => -1

the type integer in mysql.

i getting error:

'mysql2 error......'default-1 default null' @ line 1: alter table 'categories' change 'parent_id' 'parent_id' default-1 default null

it seems missing = sign?

also, how do db:migrate on test db?

you're missing column type in change_column, should more this:

change_column :categories, :parent_id, :integer, :default => -1

the giveaway this: default-1. change_column method wants 3 arguments , hash of optional arguments. :default => -1 getting mashed column type because didn't specify :integer third argument.


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