[elephant-devel] using elephant:open-store with relative paths

[Leslie P. Polzer]

Hi Lukas,

> Here is a little example:
> (asdf:operate 'asdf:load-op :elephant)
> (elephant:defpclass TopicC ()  ((value :initarg :value	  :accessor value	  :type
> string))  (:index t))
> (elephant:open-store '(:BDB
> "/home/lukas/.sbcl/site/isidorus/trunk/src/data_base"))(make-instance 'TopicC :value
> "t-1")(make-instance 'TopicC :value "t-2")(elephant:get-instances-by-class 'TopicC);
> absolute db path => (#<TOPICC oid:2> #<TOPICC oid:3>); relative db path => (#<TOPICC
> oid:2> #<TOPICC oid:3>)
> (elephant:close-store)
> (elephant:open-store '(:BDB
> "/home/lukas/.sbcl/site/isidorus/trunk/src/data_base"))(elephant:get-instances-by-class
> 'TopicC); absolute db path => (#<TOPICC oid:2> #<TOPICC oid:3>); relative db path => NIL
>
> Is this a bug or must I use absolute paths for opening a store?

You don't need to use absolute paths, but you must take care that
your relative paths are converted correctly to absolute paths.
Your Lisp's CL:*DEFAULT-PATHNAME-DEFAULTS* influences this
conversion.

In your relative path example you're probably just seeing an
empty database, i.e. not the same database as the one you have
worked with before to create the instances.

If you still need help then please give a full example that
we can reproduce.

  Leslie