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-- This config example file is released into the Public Domain.
-- This example shows how you can use JSON and JSONB columns in your database.
-- You need the 'dkjson' JSON library for Lua. Install 'dkjson' with LuaRocks
-- or install from http://dkolf.de/src/dkjson-lua.fsl/home . Debian/Ubuntu
-- users can install the 'lua-dkjson' package.
-- Use JSON encoder
local json = require('dkjson')
local places = osm2pgsql.define_node_table('places', {
-- The jsonb column is handled by osm2pgsql just like a normal text
-- column. It is the job of the Lua script to put correct json there.
{ column = 'tags', type = 'jsonb' },
{ column = 'geom', type = 'point' },
})
local function starts_with(str, start)
return str:sub(1, #start) == start
end
function osm2pgsql.process_node(object)
if not object.tags.place then
return
end
-- Put all name:* tags in their own substructure
local names = {}
local has_names = false
for k, v in pairs(object.tags) do
if k == 'name' then
names[''] = v
object.tags.name = nil
has_names = true
elseif starts_with(k, "name:") then
-- extract language
local lang = k:sub(6, -1)
names[lang] = v
object.tags[k] = nil
has_names = true
end
end
if has_names then
object.tags.names = names
end
places:add_row({
tags = json.encode(object.tags)
})
end
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