bugfix: the input data should be empty table if the field required is an empty table too.

local rule = {
    type = "object",
    properties = {
      username = { type = "string" },
      passwd = { type = "string" },
    },
    oneOf = {
        {required = {"username", "passwd"}},
        {required = {}}
    }
}

local conf = {passwd = "passwd", username = "name"}  -- valid
local conf = {}  -- valid
local conf = {passwd = "passwd"} -- invalid

Author: membphis

Makefile

@@ -1,8 +1,8 @@
 OR_EXEC ?= $(shell which openresty)
 LUA_JIT_DIR ?= $(shell ${OR_EXEC} -V 2>&1 | grep prefix | grep -Eo 'prefix=(.*?)/nginx' | grep -Eo '/.*/')luajit
 LUAROCKS_VER ?= $(shell luarocks --version | grep -E -o  "luarocks [0-9]+.")
-LUA_PATH ?= $(shell lua -e "print(package.path)")
-LUA_CPATH ?= $(shell lua -e "print(package.cpath)")
+LUA_PATH ?= $(shell luajit -e "print(package.path)")
+LUA_CPATH ?= $(shell luajit -e "print(package.cpath)")
 
 
 ### help:         Show Makefile rules.
@@ -16,12 +16,12 @@ help:
 ### dev:          Create a development ENV
 .PHONY: dev
 dev:
-ifeq ($(UNAME),Darwin)
+ifeq ($(LUAROCKS_VER),luarocks 3.)
 	luarocks install --lua-dir=$(LUA_JIT_DIR) rockspec/jsonschema-master-0.rockspec --only-deps
-else ifneq ($(LUAROCKS_VER),'luarocks 3.')
-	luarocks install rockspec/jsonschema-master-0.rockspec --only-deps
+	luarocks install --lua-dir=$(LUA_JIT_DIR) luaposix
 else
-	luarocks install --lua-dir=/usr/local/openresty/luajit jsonschema-master-0.rockspec --only-deps
+	luarocks install rockspec/jsonschema-master-0.rockspec --only-deps
+	luarocks install luaposix
 endif
 
 

lib/jsonschema.lua

@@ -653,6 +653,13 @@ generate_validator = function(ctx, schema)
     end
 
     ctx:stmt('end') -- if object
+
+    if schema.required and #schema.required == 0 then
+      -- return false if the input data is not empty
+      ctx:stmt(sformat('if %s ~= 1 then', datakind))
+      ctx:stmt(        '  return false, "the input data should be an empty table"')
+      ctx:stmt(        'end')
+    end
   end
 
   -- array checks

t/default.lua

@@ -28,4 +28,34 @@ if not conf.rule then
   ngx.say("fail: missing default value")
   return
 end
+
+rule = {
+  type = "object",
+  properties = {
+    username = { type = "string" },
+    passwd = { type = "string" },
+  },
+  oneOf = {
+      {required = {"username", "passwd"}},
+      {required = {}}
+  }
+}
+
+validator = jsonschema.generate_validator(rule)
+
+local ok, err = validator({passwd = "passwd", username = "name"})
+if not ok then
+  ngx.say("fail: check default value: ", err)
+end
+
+ok, err = validator({})
+if not ok then
+  ngx.say("fail: check default value: ", err)
+end
+
+ok = validator({passwd = "passwd"})
+if ok then
+  ngx.say("fail: expect to fail")
+end
+
 ngx.say("passed: table value as default value")