Re: Database information from validate_doc_update

[email protected] Sat, 09 Nov 2013 03:50:48 -0800

I want set limit base document count.
And now i see one way:
1) In Change Notifications function i see count document in base

2) if size of database larger given: replace validate_doc_updatefunction and denied create new docs.


It is long and slow way.
Maybe someone will tell a better implementation?

Deliberately not, no, a validate_doc_update function is only passed
the new document you're trying to update, the current one (if there is
one), the context of the user and the security object for the
database.

B.


On 9 November 2013 11:00, [email protected] <[email protected]> wrote:

And i not possible get information about data base from validate_doc_update?

validate_doc_update functions deliberately don't let you do this
otherwise eventually consistency can be compromised.

Also remember that the native view server has no sandbox, anyone
allowed to edit design documents can do anything to your servers that
the user you run couchdb as can (read files, open network connections,
delete files, etc).

B.


On 9 November 2013 09:02, [email protected] <[email protected]>
wrote:

It is very good!
But, i create validation function and see error:

Error: EXIT

{{badmatch,[]},
   [{couch_query_servers,new_process,3,
[{file,"couch_query_servers.erl"},{line,472}]},
    {couch_query_servers,lang_proc,3,
[{file,"couch_query_servers.erl"},{line,462}]},
    {couch_query_servers,handle_call,3,
[{file,"couch_query_servers.erl"},{line,322}]},
    {gen_server,handle_msg,5,[{file,"gen_server.erl"},{line,585}]},
{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,239}]}]}

I am not understand Erlang code, and not see error details.
You have it working?

In /etc/couchdb/local.ini i added
[native_query_servers]
erlang = {couch_native_process, start_link, []}

Currently, this is possible only via native Erlang query server:

fun(NewDoc, OldDoc, {UserCtx}, SecObj) ->
     DbName = couch_util:get_value(<<"db">>, UserCtx),
     {ok, Db} = couch_db:open_int(DbName, [{user_ctx, UserCtx}]),
     {ok, Info} = couch_db:get_db_info(Db),
     DiskSize = couch_util:get_value(disk_size, Info),
     case DiskSize < 100000 of  %% ~100KB
       true ->
         ok;
       false ->
         throw({[{<<"forbidden">>, <<"quota limit reached">>}]})
     end,
     1
end.



--
,,,^..^,,,


On Sat, Nov 9, 2013 at 7:56 AM, [email protected]
<[email protected]> wrote:

Hello.

Can I get information about the database as a function of
validate_doc_update? For example, to find out the size of the database
or
the number of documents.

Example:
function(newDoc, oldDoc, userCtx) {
    if ( thisDb.disk_size > 1000 ) throw({forbidden : 'you have exceeded
the
limit'});
}

It is possible?

Thanks.

Re: Database information from validate_doc_update

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