I've got an old site running Django 1.1 with a postgress backend.  I'm moving 
it to Django 1.3, with MySQL.  I dumped all the old data with:

$ python manage.py dumpdata --indent 2 > materia-dump.2012-04-06.json

I created a brand new MySQL database and ran syncdb, then tried to import the 
data with

$ python manage.py loaddata materia-dump.2012-04-06.json

But I get complaints about duplicate keys:

> Problem installing fixture '/home/roy/materia-dump.2012-04-06.json': 
> Traceback (most recent call last):
>   File 
> "/usr/lib/pymodules/python2.6/django/core/management/commands/loaddata.py", 
> line 174, in handle
>     obj.save(using=using)
>   File "/usr/lib/pymodules/python2.6/django/core/serializers/base.py", line 
> 165, in save
>     models.Model.save_base(self.object, using=using, raw=True)
>   File "/usr/lib/pymodules/python2.6/django/db/models/base.py", line 526, in 
> save_base
>     rows = manager.using(using).filter(pk=pk_val)._update(values)
>   File "/usr/lib/pymodules/python2.6/django/db/models/query.py", line 491, in 
> _update
>     return query.get_compiler(self.db).execute_sql(None)
>   File "/usr/lib/pymodules/python2.6/django/db/models/sql/compiler.py", line 
> 869, in execute_sql
>     cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
>   File "/usr/lib/pymodules/python2.6/django/db/models/sql/compiler.py", line 
> 735, in execute_sql
>     cursor.execute(sql, params)
>   File "/usr/lib/pymodules/python2.6/django/db/backends/util.py", line 34, in 
> execute
>     return self.cursor.execute(sql, params)
>   File "/usr/lib/pymodules/python2.6/django/db/backends/mysql/base.py", line 
> 86, in execute
>     return self.cursor.execute(query, args)
>   File "/usr/lib/pymodules/python2.6/MySQLdb/cursors.py", line 166, in execute
>     self.errorhandler(self, exc, value)
>   File "/usr/lib/pymodules/python2.6/MySQLdb/connections.py", line 35, in 
> defaulterrorhandler
>     raise errorclass, errorvalue
> IntegrityError: (1062, "Duplicate entry 'photologue-gallery' for key 
> 'app_label'")


Looking at the json output, I don't see any duplicates.  I've got:

  {
    "pk": 9,
    "model": "contenttypes.contenttype",
    "fields": {
      "model": "gallery",
      "name": "gallery",
      "app_label": "photologue"
    }
  },

but that's the only entry for name = "gallery", app_label = "photologue".  Any 
idea what I'm doing wrong?


---
Roy Smith
r...@panix.com



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