observe_custom_pivot/2
Add custom pivot fields to a resource’s search index (map) Result is a single tuple or list of tuples `{pivotname,
props}, where “pivotname” is the pivot defined in a call to zpivotrsc:definecustompivot/3` or a table with
created using a SQL command during (eg.) in a module manage_schema/2 call. The name of the table is
pivot_<pivotname\>. The props is either a property list or a map with column/value pairs.
The table MUST have an id column, with a foreign key constraint to the rsc table. If you define the pivot table
using z_pivot_rsc:define_custom_pivot/3 then this column and foreign key constraint are automatically added.
Type:
Return:
#custom_pivot{} properties:
id:
m_rsc:resource_id()