"Ramiro Morales" <[EMAIL PROTECTED]> writes:
> On 2/10/07, David Abrahams <[EMAIL PROTECTED]> wrote:
>>
>> Whatever django bugs may be lurking asid, I need to move forward with
>> my project ASAP so I'd really appreciate it if someone could give me a
>> few hints about how to evolve my existing DB (which was created
>> without the primary_key=True and (I think) also without null=True) so
>> I can still use the data.
>
> Disclamer: I know almost nothing about databases.
>
> Oh, this is a (new) hint. You are not sure if you created your data
> when the Session -> Track ForeignKey had null=True? If it hadn' t
> and you are now trying to modify it it to use that option without
> also modifying the DB, it's not that strange you are getting errors.
Yes, I'm aware of that. That's why I asked for help evolving the DB.
> You could confirm that by examining the table stucture. Use:
>
> $ ./manage.py sql program
>
> twice, once without null=True and once with null=True, to see the difference
> and eventually create the ALTER TABLE SQL sentence to modify to reflect
> the change you' ve made to your model without losing your valuable data.
Good trick, thanks.
> This is using sqlite3:
>
> --- nonull.txt 2007-02-10 19:29:23.000000000 -0300
> +++ nulltrue.txt 2007-02-10 19:28:48.000000000 -0300
> @@ -13,13 +13,13 @@
> CREATE TABLE "program_session" (
> "id" integer NOT NULL PRIMARY KEY,
> "title" varchar(200) NOT NULL,
> "short_title" varchar(50) NOT NULL,
> "description" text NOT NULL,
> "start_id" integer NOT NULL REFERENCES "program_timedivision" ("id"),
> - "track_id" integer NOT NULL REFERENCES "program_track" ("id"),
> + "track_id" integer NULL REFERENCES "program_track" ("id"),
> "duration" time NOT NULL,
> UNIQUE ("start_id", "track_id"),
> UNIQUE ("title")
> );
> CREATE TABLE "program_speaker" (
> "id" integer NOT NULL PRIMARY KEY,
Super; thanks for your help!
--
Dave Abrahams
Boost Consulting
www.boost-consulting.com
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