Sorry I dont help me
I did rails g migration id_category bericht
And changed the migration file to this
class IdCategory < ActiveRecord::Migration
def up
add_column :bericht, id_category, number
end
def down
end
end
After that I did rake db:migrate and get this output :
== IdCategory: migrating
=====================================================
-- id_category()
rake aborted!
An error has occurred, this and all later migrations canceled:
undefined local variable or method `id_category' for
#<IdCategory:0x00000004c3f0d8>
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
Roelof
Op dinsdag 23 oktober 2012 16:56:42 UTC+2 schreef BalaRaju Vankala het
volgende:
>
> you have to create a new migration for add_column
> using rails g migration col_name_table_name
> in that migration file you have to follow below syntax
>
>
> def up
> add_column : table_name, column_name, data_type
> end
>
> i hope its help to you..
> On Tue, Oct 23, 2012 at 8:19 PM, roelof <[email protected]
> <javascript:>>wrote:
>
>> Hello,
>>
>> I try to add a column named id_category to my database table berichten.
>> So I have this :
>>
>> class Bericht < ActiveRecord::Migration
>> def up
>> add_column :berichten do [t]
>> t.column :name, 'id_category'
>> end
>> end
>> def down
>> end
>> end
>>
>> But I get wrong number ( 1 of 3 ) error message.
>>
>> Can anyone tell me what's wrong here so I can learn to write my own
>> migrations.
>>
>> Roelof
>>
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>>
>
>
>
>
>
>
>
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