[erlang-questions] Fwd: Can't create schema in Mnesia

Yves S. Garret <>
Sun Jan 19 04:03:35 CET 2014


@ *Ludovic Demblans, sure.*

29> rp(lists:sort(mnesia:module_info(exports))).
[{module_info,0},{module_info,1},{setup,0}]
ok

---------- Forwarded message ----------
From: Yves S. Garret <>
Date: Sat, Jan 18, 2014 at 9:35 PM
Subject: Re: [erlang-questions] Can't create schema in Mnesia
To: Bob Ippolito <>
Cc: "" <>


Done, no change:

19> c(mnes).
{ok,mnes}
20> rr("records.hrl").
[planemo,tower]
21> mnes:setup().

** exception error: undefined function mnesia:create_schema/1
     in function  mnes:setup/0 (mnes.erl, line 24)

Here is records.hrl:
http://bin.cakephp.org/view/1897069453


On Sat, Jan 18, 2014 at 9:32 PM, Bob Ippolito <> wrote:

> Rename the module to something other than mnesia, there's a flat module
> namespace and only one module named mnesia can be loaded at a time.
>
>
> On Saturday, January 18, 2014, Yves S. Garret <>
> wrote:
>
>> Hello all,
>>
>> I have the following code:
>> http://bin.cakephp.org/view/2135184996
>>
>> When I compile and reload the records, this is what happens:
>>
>> 14> c(mnesia).
>> {ok,mnesia}
>> 15> rr("records.hrl").
>> [planemo,tower]
>> 16> mnesia:setup().
>> ** exception error: undefined function mnesia:create_schema/1
>>      in function  mnesia:setup/0 (mnesia.erl, line 25)
>>
>> The function _does_ exist in the mnesia module.  I checked the docs and
>> I'm running 16B03, so it's there.  But why this error?
>>
>> Also, I have an another question.  Lets say I'm testing some code and I
>> comment out where I'm calling a function (located in the same file.)  How
>> can I tell the compiler to not worry about this file not being called?  I
>> know I can for variables such as _Variable, but methods?
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20140118/52bce7e5/attachment.html>


More information about the erlang-questions mailing list