I got the error afterwards, i.e. I ran fake_migration_all (without errors) 
and then I altered a table and kicked migrate=true. That's where I ran into 
the same error as before.

Am Donnerstag, 5. April 2018 22:54:16 UTC+2 schrieb Anthony:
>
> Need to see your code. With fake_migrate_all=True, the DAL will generate 
> migration files but no run any migrations, so you cannot get that error.
>
> Anthony
>
> On Thursday, April 5, 2018 at 11:49:38 AM UTC-4, Stephan wrote:
>>
>> Hi Antony, 
>> does not seem to work.
>> I still get an error by setting migrate to true. In which directory are 
>> the *.table file written to? 
>> thx
>>
>>
>>
>> <class '_mysql_exceptions.OperationalError'> (1050, "Table 'auth_user' 
>> already exists")Version
>> web2py™ Version 2.8.2-stable+timestamp.2013.11.28.13.54.07Traceback
>>
>> 1.
>> 2.
>> 3.
>> 4.
>> 5.
>> 6.
>> 7.
>> 8.
>> 9.
>> 10.
>> 11.
>> 12.
>> 13.
>> 14.
>> 15.
>> 16.
>> 17.
>> 18.
>> 19.
>> 20.
>> 21.
>> 22.
>> 23.
>> 24.
>> 25.
>>
>> Traceback (most recent call last):
>>   File "/home/mhoch4/web2py/gluon/restricted.py", line 217, in restricted
>>     exec ccode in environment
>>   File "/home/mhoch4/web2py/applications/psychogramm/models/db.py" 
>> <https://mhoch4.pythonanywhere.com/admin/default/edit/psychogramm/models/db.py>,
>>  line 53, in <module>
>>     auth.define_tables(username=False, signature=False)
>>   File "/home/mhoch4/web2py/gluon/tools.py", line 1737, in define_tables
>>     format='%(first_name)s %(last_name)s (%(id)s)'))
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 8139, in define_table
>>     table = self.lazy_define_table(tablename,*fields,**args)
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 8176, in lazy_define_table
>>     polymodel=polymodel)
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 1058, in create_table
>>     self.create_sequence_and_triggers(query,table)
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 1899, in 
>> create_sequence_and_triggers
>>     self.execute(query)
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 1916, in execute
>>     return self.log_execute(*a, **b)
>>   File "/home/mhoch4/web2py/gluon/dal.py", line 1910, in log_execute
>>     ret = self.cursor.execute(command, *a[1:], **b)
>>   File "/usr/local/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 
>> 205, in execute
>>     self.errorhandler(self, exc, value)
>>   File "/usr/local/lib/python2.7/dist-packages/MySQLdb/connections.py", line 
>> 36, in defaulterrorhandler
>>     raise errorclass, errorvalue
>> OperationalError: (1050, "Table 'auth_user' already exists")
>>
>> Am Dienstag, 3. April 2018 21:17:52 UTC+2 schrieb Anthony:
>>>
>>> Probably you don't have *.table files indicating the current status of 
>>> the database schema. First, without the new column in the code, run a 
>>> request with fake_migrate_all=True, which will create an updated set of 
>>> *.table files. Then add the new column, and the migration should work.
>>>
>>> Anthony
>>>
>>> On Tuesday, April 3, 2018 at 12:14:30 PM UTC-4, Stephan wrote:
>>>>
>>>> I am getting an "tables already exist" error after adding column to an 
>>>> existing table in db.py  and setting migrate from false to true. It's 
>>>> connected to a mysql. Application is running in version 2.8.2. Is there 
>>>> some cahce to be cleared? thx
>>>>
>>>

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