[erlang-questions] Mnesia and Yaws

Ludovic Coquelle <>
Tue Aug 7 02:43:43 CEST 2007


Just few idea coming in mind:

Are you trying to configure 2 nodes (the erlang shell and the yaws
server) to use the same mnesia directory? is this possible? I'm quite
newby with mnesia, but my assumption (may be wrong) was that each node
should at least have it's own mnesia schema directory.

Or maybe a problem with nodes which can not see each other (looks like
you haven't named your nodes). Mnesia need communication between
nodes, so have to start the nodes with names (-sname).

Ludo

On 8/6/07, Jim Menard <> wrote:
> I've defined a Mnesia database and can access it from within the erl
> command line. However, when I try to access it from my Yaws web app, I
> see the error message:
>
> ERROR erlang  code  crashed:
>  File: /Users/jimm/src/jimm/src/erlang/fake/www/do_login.yaws:1
> Reason: {{badmatch,{aborted,{}}},
>          ...
>
> I haven't stopped Mnesia from the command line, and can still access
> it. The database directory  exists in the root
> directory for my Yaws project, and that's where I run the yaws command
> from.
>
> What do I have to do in Yaws to connect to the same database? Have I
> missed something in the Yaws or Mnesia documentation? The Yaws docs
> about yapps mentions Mnesia---do I have to create a Yaws app to use
> Mnesia?
>
> Thank you for any help or pointers to documentation.
>
> Jim
> --
> Jim Menard, , 
> http://www.io.com/~jimm/
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