Import relation with no geometry using flex

Is there a way to import a relation using the flex style when that relation doesn't have any related geometry data?

I'm trying to import a list of ski resorts in Scotland but one is not being imported correctly. I've done some digging and found that there is a relation which has a lot of ways as members, allowing me to group all those ways, but as there is no geometry field associated with that relation it doesn't appear in the database after I call add_row.

In a reduced test case I've found that if I remove the geometry field from the relevant database table, the relation is added correctly.

inspect = require('inspect')

local tables = {}

tables.relations_test = osm2pgsql.define_table({ name = 'relations_test', ids = { type = 'area', id_column = "id"}, columns = { { column = 'name', type = 'text' }, --{ column = 'geom', type = 'geometry' }, } })

function osm2pgsql.process_relation(object) if object:grab_tag('type') == "site" then

    print("Matched rel ", object.id, object.tags.name)

    tables.relations_test:add_row({
        name = object.tags.name,
      --  geom = { create = 'area' },
    })

end

end If I remove the commented out lines in the above, my relation is not imported into the table. This suggests to me that each row requires a geometry.

If there any way to maintain the geometry field in the row (it's populated for other relations and ways) but allow it to be NULL?