The error below is the result of trying to use mnesia as the back end
database. Mnesia was chosen for this as it was already used for another
erlang application and this is suppose to be the web front end to it.
The table is created successfully using similar code to that defined
below (the record_info/2 function call is replaced manually with [id,
username, password, roles] and Nodes is replaced by [nodes()] to run it
from the shell). The module is otherwise empty except for the copiler
directives. When it comes to compiling it complains of "no function
clause matching" (see further down in this message for the dump). Any
thought or suggestions on how to correct this?
Also, what should the {Field, {Type, Modifier}, Null, Key, Default,
Extra, MnesiaType} be for record element roles if it's to be a list of
atoms?
Jeff.
%% mgr_user.erl
-record(mgr_user, {
id,
username,
password,
roles = [] %% roles take the form
module_action
}).
create_table(Nodes) when is_list(Nodes) ->
mnesia:create_table(counter, [{disc_copies, Nodes}, {attributes,
[key, counter]}]),
mnesia:create_table(mgr_user, [{disc_copies, Nodes},
{attributes, record_info(fields,
mgr_user)},
{user_properties,
[
%% {Field, {Type, Modifier},
Null, Key, Default, Extra, MnesiaType}
%% {id,
{integer,undefined},false,primary,undefined,undefined,integer},
{username,
{varchar,undefined},false,undefined,undefined,undefined,list},
{password,
{varchar,undefined},false,undefined,undefined,undefined,list},
{roles,
{varchar,undefined},false,undefined,undefined,undefined,list}
]
}
]),
mnesia:dirty_update_counter(counter, mgr_user, 1).
> erlyweb:compile("mgr_erlyweb",[{erlydb_driver, mnesia}]).
debug:erlyweb_compile:379: Compiling Erlang file "mgr_user_controller"
debug:erlyweb_compile:379: Compiling Erlang file "mgr_user"
debug:erlyweb_compile:114: Generating ErlyDB code for models:
"mgr_user.erl "
debug:erlydb:355:
--- To skip foreign key checks, compile with the {skip_fk_checks, true}
option
** exception error: no function clause matching
gb_trees:lookup_1(mgr_user,
{3,
{mgr_user,
[{erlydb_field,username,"username",<<"username">>,
varchar,undefined,binary,text_field,false,undefined,
undefined,undefined,undefined},
....
in function erlydb:gen_module_code/5
in call from lists:foreach/2
in call from erlyweb_compile:compile/2
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"erlyweb" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/erlyweb?hl=en
-~----------~----~----~----~------~----~------~--~---
