Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #36870
| References | <a8e71415-57fc-4284-82fe-fae0a6670a67@googlegroups.com> <mailman.540.1358260620.2939.python-list@python.org> <2fce91ea-374c-4f55-9e53-fe4032c2f5fd@googlegroups.com> <mailman.544.1358269996.2939.python-list@python.org> <8d9daaa7-091c-4810-85d2-0a7b03838441@googlegroups.com> |
|---|---|
| Date | 2013-01-15 22:27 +0000 |
| Subject | Re: sqlite3 puzzle |
| From | Rob Day <robert.day@merton.oxon.org> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.552.1358288851.2939.python-list@python.org> (permalink) |
Glad I could help!
<evangelism>
Using a local source control system like git, bzr or hg is really
useful in situations like these - it's far, far easier to debug issues
of the form "I made changes and now it's broken" when you can do `git
diff yesterday's-version today's-version` and see exactly what the
changes were.
</evangelism>
On 15 January 2013 20:29, llanitedave <llanitedave@veawb.coop> wrote:
> On Tuesday, January 15, 2013 9:13:13 AM UTC-8, Rob Day wrote:
>> On 15 January 2013 15:51, llanitedave <llanitedave@veawb.coop> wrote:
>>
>> > Thanks for the suggestion, Rob, but that didn't make any difference. I've never had an issue with putting the execute object into a variable and calling "fetch" on that variable.
>>
>> >
>>
>> > I can accept reality if it turns out that foreign keys simply isn't enabled on the Python distribution of sqlite, although I don't know why that should be the case. I'm just curious as to why it worked at first and then stopped working.
>>
>>
>>
>> Well - you might be able to accept that, but I'm not sure I can! If it
>>
>> was working before, it must be compiled in, and so it must be possible
>>
>> to make it work again.
>>
>>
>>
>> http://www.sqlite.org/foreignkeys.html#fk_enable seems to suggest that
>>
>> "PRAGMA foreign_keys = ON" never returns anything, and it's only
>>
>> "PRAGMA foreign_keys" which returns 0, 1 or None (when unsupported).
>>
>> With that in mind, does the following code work?
>>
>>
>>
>> # open database file
>>
>>
>>
>> self.geologger_db = sqlite3.connect('geologger.mgc')
>>
>> self.db_cursor = self.geologger_db.cursor()
>>
>> self.db_cursor.execute("PRAGMA foreign_keys = ON")
>>
>> self.db_cursor.execute("PRAGMA foreign_keys")
>>
>> print self.db_cursor.fetchone()
>
> "http://www.sqlite.org/foreignkeys.html#fk_enable seems to suggest that "PRAGMA foreign_keys = ON" never returns anything, and it's only "PRAGMA foreign_keys" which returns 0, 1 or None (when unsupported)."
>
> That was it, exactly, Rob. I don't know where I got the idea that I was getting a '1' from the 'ON' command, although I was sure that I'd seen it. But once I just called "foreign_key" it returned just fine.
>
> Ummm... Obviously I was up fiddling around too late. Yeah, that's it.
>
>
> Thanks! It's solved now.
> --
> http://mail.python.org/mailman/listinfo/python-list
--
Robert K. Day
robert.day@merton.oxon.org
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-14 23:09 -0800
Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 14:36 +0000
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 07:51 -0800
Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 17:13 +0000
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 12:29 -0800
Re: sqlite3 puzzle Rob Day <robert.day@merton.oxon.org> - 2013-01-15 22:27 +0000
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 14:46 -0800
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 14:46 -0800
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 12:29 -0800
Re: sqlite3 puzzle llanitedave <llanitedave@veawb.coop> - 2013-01-15 07:51 -0800
Re: sqlite3 puzzle inq1ltd <inq1ltd@inqvista.com> - 2013-01-15 11:54 -0500
csiph-web