Modernize attributes.lua example config

* Use insert()
* Use table names nodes/ways instead of points/lines
* Add nodes/members fields for ways/relations

Author: joto

flex-config/attributes.lua

@@ -3,14 +3,15 @@
 -- This config shows how to access the attributes of OSM objects: the version,
 -- changeset id, timestamp, user id and user name. For this to work the
 -- command line option --extra-attributes/-x must be set, otherwise those
--- fields will be empty.
+-- fields will be empty. Also note that some OSM files do not contain all
+-- of those attributes, so check your input data if you get empty fields.
 
 -- Set this to the projection you want to use
 local srid = 4326
 
 local tables = {}
 
-tables.points = osm2pgsql.define_node_table('points', {
+tables.nodes = osm2pgsql.define_node_table('nodes', {
     { column = 'tags', type = 'jsonb' },
     { column = 'geom', type = 'point', projection = srid },
     { column = 'version', type = 'int' },
@@ -23,14 +24,15 @@ tables.points = osm2pgsql.define_node_table('points', {
     { column = 'user', type = 'text' },
 })
 
-tables.lines = osm2pgsql.define_way_table('lines', {
+tables.ways = osm2pgsql.define_way_table('ways', {
     { column = 'tags', type = 'jsonb' },
     { column = 'geom', type = 'linestring', projection = srid },
     { column = 'version', type = 'int' },
     { column = 'changeset', type = 'int' },
     { column = 'created', sql_type = 'timestamp' },
     { column = 'uid', type = 'int' },
     { column = 'user', type = 'text' },
+    { column = 'nodes', type = 'text', sql_type = 'bigint[]' },
 })
 
 tables.relations = osm2pgsql.define_relation_table('relations', {
@@ -40,42 +42,51 @@ tables.relations = osm2pgsql.define_relation_table('relations', {
     { column = 'created', sql_type = 'timestamp' },
     { column = 'uid', type = 'int' },
     { column = 'user', type = 'text' },
+    { column = 'members', type = 'jsonb' },
 })
 
+function format_date(ts)
+    return os.date('!%Y-%m-%dT%H:%M:%SZ', ts)
+end
+
 function osm2pgsql.process_node(object)
     if next(object.tags) == nil then
         return
     end
 
-    tables.points:add_row({
+    tables.nodes:insert({
         tags = object.tags,
+        geom = object:as_point(),
         version = object.version,
         changeset = object.changeset,
-        created = os.date('!%Y-%m-%dT%H:%M:%SZ', object.timestamp),
+        created = format_date(object.timestamp),
         uid = object.uid,
         user = object.user
     })
 end
 
 function osm2pgsql.process_way(object)
-    tables.lines:add_row({
+    tables.ways:insert({
         tags = object.tags,
+        geom = object:as_linestring(),
         version = object.version,
         changeset = object.changeset,
-        created = os.date('!%Y-%m-%dT%H:%M:%SZ', object.timestamp),
+        created = format_date(object.timestamp),
         uid = object.uid,
-        user = object.user
+        user = object.user,
+        nodes = '{' .. table.concat(object.nodes, ',') .. '}'
     })
 end
 
 function osm2pgsql.process_relation(object)
-    tables.relations:add_row({
+    tables.relations:insert({
         tags = object.tags,
         version = object.version,
         changeset = object.changeset,
-        created = os.date('!%Y-%m-%dT%H:%M:%SZ', object.timestamp),
+        created = format_date(object.timestamp),
         uid = object.uid,
-        user = object.user
+        user = object.user,
+        members = object.members
     })
 end