Kong schema validation

schema.lua

setmetatable(_G, nil)

local MetaSchema = require "kong.db.schema.metaschema"

local s1 = {
  name = "schema",
  primary_key = {},
  fields = {
    { js_enabled = { type = "boolean" }},
    { sql_enabled = { type = "boolean" }},
    { custom = { type = "array", elements = { type = "record", fields = {{ name = { type = "string", } } } }}},
  },
  entity_checks = {
    { at_least_one_of = { "js_enabled", "sql_enabled", "custom" } },
  },
}

assert(MetaSchema:validate(s1))

local Entity = require "kong.db.schema.entity"
local S1 = Entity.new(s1)

-- ok: all bundled + custom
assert(S1:validate({js_enabled = true, sql_enabled = true, custom = {}}))

-- ok: only bundled
assert(S1:validate({js_enabled = true, sql_enabled = true}))

-- ok: only custom
assert(S1:validate({custom = {{ name = "foo" }}}))

-- not ok: custom without at least one element
local ok, err = S1:validate({custom = {}})
print(require"inspect"(err))