edge_delete

An edge has been deleted Note that the Context for this notification does not have the user who deleted the edge.

Type:

notify

Return:

return value is ignored

#edge_delete{} properties:

subject_id: m_rsc:resource()
predicate: atom
object_id: m_rsc:resource()
edge_id: pos_integer

Example

Perform some action when an edge is deleted:

-include_lib("zotonic_core/include/zotonic.hrl").
-export([observe_edge_delete/2]).

observe_edge_delete(#edge_delete{edge_id = Id}, Context) ->
    %% Consult the edge_log table to get the late edge's details
    Edge = z_db:assoc_row("select * from edge_log where edge_id = $1", [Id], Context)),

    ?DEBUG(Edge),
    %% logged is when the deletion was logged; created is when the edge was
    %% originally created
    %% [{id,11},{op,<<"DELETE">>},{edge_id,25},{subject_id,341},{predicate_id,300},{predicate,<<"about">>},{object_id,338},{seq,1000000},{logged,{{2016,10,13},{10,23,21}}},{created,{{2016,10,13},{10,23,13}}}]

    %% Do something...

    ok.

Edit on GitHub