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Fixed #12837 -- Clarified the naming strategy for m2m intermediate tables. Thanks to Ramiro Morales for the report and patch. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12516 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2010-02-23 13:21:07 +00:00
parent c306b78150
commit a555df4c06
1 changed files with 9 additions and 8 deletions
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17
docs/ref/models/fields.txt
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@ -331,7 +331,7 @@ otherwise. See :ref:`automatic-primary-key-fields`.
A 64 bit integer, much like an :class:`IntegerField` except that it is
guaranteed to fit numbers from -9223372036854775808 to 9223372036854775807. The
admin represents this as an ``<input type="text">`` (a single-line input).
``BooleanField``
----------------
@ -772,7 +772,7 @@ A :class:`CharField` for a URL. Has one extra optional argument:
If ``True`` (the default), the URL given will be checked for existence
(i.e., the URL actually loads and doesn't give a 404 response).
Note that when you're using the single-threaded development server,
validating a URL being served by the same server will hang. This should not
be a problem for multithreaded servers.
@ -913,12 +913,13 @@ the model is related. This works exactly the same as it does for
Database Representation
~~~~~~~~~~~~~~~~~~~~~~~
Behind the scenes, Django creates an intermediary join table to represent the
many-to-many relationship. By default, this table name is generated using the
names of the two tables being joined. Since some databases don't support table
names above a certain length, these table names will be automatically
truncated to 64 characters and a uniqueness hash will be used. This means you
might see table names like ``author_books_9cdf4``; this is perfectly normal.
Behind the scenes, Django creates an intermediary join table to
represent the many-to-many relationship. By default, this table name
is generated using the name of the many-to-many field and the model
that contains it. Since some databases don't support table names above
a certain length, these table names will be automatically truncated to
64 characters and a uniqueness hash will be used. This means you might
see table names like ``author_books_9cdf4``; this is perfectly normal.
You can manually provide the name of the join table using the
:attr:`~ManyToManyField.db_table` option.