Memento v0.2.0 Memento.Schema View Source
Module to interact with the database schema.
For persisting data, Mnesia databases need to be created on disk. This module provides an interface to create the database on the disk of the specified nodes. Most of the time that is usually the node that the application is running on.
# Create disk copies on current node
Memento.Schema.create([ node() ]
# Create disk copies on many nodes
node_list = [node(), :alice@host_x, :bob@host_y, :eve@host_z]
Memento.Schema.create(node_list)
Important thing to note here is that only the nodes where data has to
be persisted to disk have to be included. RAM-only nodes should be
left out. Disk schemas can also be deleted by calling delete/1
and
you can get information about them by calling info/0
.
Link to this section Summary
Link to this section Functions
Creates a new database on disk on the specified nodes.
Calling :mnesia.create_schema
for a custom path throws an exception
if that path does not exist. Memento’s version avoids this by ensuring
that the directory exists.
Also see :mnesia.create_schema/1
.
Deletes the database previously created by create/1
on the specified
nodes.
Use this with caution, as it makes persisting data obsolete. Also see
:mnesia.delete_schema/1
.
Prints schema information about all Tables to the console.
Prints schema information about the specified Table to the console.