diff --git a/src/api/system/user.lua b/src/api/system/user.lua
index 532b8d2..df1ed06 100644
--- a/src/api/system/user.lua
+++ b/src/api/system/user.lua
@@ -61,7 +61,7 @@ end
 --根据用户id删除用户信息
 function _M.delete_user(m)
     local id = m.id
-    local code, ret = dao.delete_user(id)
+    local code, ret = dao.deleteUser(id)
     local result = resp:json(code, ret)
     resp:send(result)
 end
@@ -79,7 +79,7 @@ function _M.update_user(m)
         resp:send(result)
         return
     end
-    local code, ret = dao.update_user(id, body_data)
+    local code, ret = dao.updateUser(id, body_data)
     local result = resp:json(code, ret)
     resp:send(result)
 end
diff --git a/src/test/test.lua b/src/test/test.lua
index 720b066..e96ee13 100644
--- a/src/test/test.lua
+++ b/src/test/test.lua
@@ -31,46 +31,64 @@ code, res = User:all()
 --    end
 --end
 
+--ngx.say("----begin where and query---")
 -- 返回 users 表中 username 字段的值是 `cgreen` 的，`password` 字段的值是 `xxxxxx` 的多条数据，注意此处返回是 table 数组，`first()` 方法返回的是单条数据
-code, res = User:where('username','=','zhangsan'):where('password','=','111111'):get()
-for _, row in ipairs(res) do
-    for key, value in pairs(row) do
-        ngx.say(key .. ":" .. tostring(value))
-    end
-end
+code, res = User:where('name','=','zhangsan'):where('password','=','111111'):get()
+--for _, row in ipairs(res) do
+--    for key, value in pairs(row) do
+--        ngx.say(key .. ":" .. tostring(value))
+--    end
+--end
 
+--ngx.say("----begin where or query---")
 -- 返回 `name` 为 `xxx` 或者 `yyy` 的所有用户 table 数组
 code, res = User:where('name','=','zhangsan'):orwhere('name','=','admin'):get()
-for _, row in ipairs(res) do
+--for _, row in ipairs(res) do
+--    for key, value in pairs(row) do
+--        ngx.say(key .. ":" .. tostring(value))
+--    end
+--end
+
+--orderby(column, option)方法，第一个参数传入排序的列名，第二个参数默认为ASC 也可以传入 ASC 正序 或 DESC 倒序(不区分大小写)，
+code, res = User:orderby('created_time'):get()
+--for _, row in ipairs(res) do
+--    for key, value in pairs(row) do
+--        ngx.say(key .. ":" .. tostring(value))
+--    end
+--end
+
+-- 创建一个用户
+code, res = User:create({
+    id='3',
+    password='22222',
+    name='lisi',
+    email='lisi@gmail.com',
+})
+
+-- 更新 id = 1 的 user 的 name 为 test, avatar 为 NULL
+code, res = User:where('id', '=', '3'):update({
+    phone='666666',
+    email='zhangsan@qq.com'
+})
+--输出更新后影响的行总数
+ngx.say("update affected_rows: ", res.affected_rows)
+
+-- 删除 id = 1 的用户
+code, res = User:where('id','=','3'):delete()
+ngx.say("delete affected_rows: ", res.affected_rows)
+
+--分页 获取数据表中的记录
+local data = nil
+code, data = User:paginate(1)
+local count = data.total
+ngx.say("data total:", count)
+for _, row in ipairs(data.data) do
+    ngx.say("begin show data:")
     for key, value in pairs(row) do
         ngx.say(key .. ":" .. tostring(value))
     end
 end
 
---orderby(column, option)方法，第一个参数传入排序的列名，第二个参数默认为ASC 也可以传入 ASC 正序 或 DESC 倒序(不区分大小写)，
---code, res = User:orderby('created_at'):get()
-
--- 创建一个用户
---code, res = User:create({
---    id=3,
---    password='22222',
---    name='lisi',
---    email='lisi@gmail.com',
---})
-
--- 更新 id = 1 的 user 的 name 为 test, avatar 为 NULL
---code, res = User:where('id', '=', '1'):update({
---    phone='666666',
---    email='zhangsan@qq.com'
---})
-
--- 删除 id = 1 的用户
---code, res = User:where('id','=','1'):delete()
-
---分页 获取数据表中的记录
---local code, userPages = User:paginate(1)
---ngx.say(userPages)
-
 --获取请求参数的键值和数据值
 --local cjson = require("cjson")
 --local header = ngx.req.get_headers()
diff --git a/src/util/model.lua b/src/util/model.lua
index d1dcfc2..48d952a 100644
--- a/src/util/model.lua
+++ b/src/util/model.lua
@@ -65,7 +65,7 @@ function _M:retrieve_relations(ids)
 		return {}
 	end
 	local ids_str = implode(unique(ids))
-	self.relation_sql = 'select * from '..self.relation.model.table..' where ' .. self.relation.foreign_key .. ' in (' .. ids_str .. ')'
+	self.relation_sql = 'select * from \"'..self.relation.model.table..'\" where ' .. self.relation.foreign_key .. ' in (' .. ids_str .. ')'
 	return table_remove(self:query(self.relation_sql, READ), self.relation.model:get_hidden())
 end
 
@@ -128,7 +128,7 @@ function _M:find(id,column)
 	column = column or 'id'
 	id = transform_value(id)
     ngx.log(ngx.INFO, 'table name :' .. self.table)
-	local sql = 'select * from '..self.table..' where '..column..'='..id..' limit 1'
+	local sql = 'select * from \"'..self.table..'\" where '..column..'='..id..' limit 1'
     ngx.log(ngx.INFO, 'query sql:', sql)
 	local code, res = self:query(sql, READ)
 	if table.getn(res) > 0 then
@@ -210,63 +210,56 @@ function _M:get(num)
 	end
 	if not self.query_sql then
 		ngx.log(ngx.ERR,'do not have query sql str')
-		return
+		return 2,nil
 	end
-	local sql = 'select * from '..self.table..' '..self.query_sql .. ' ' .. limit_sql
-	local res = self:query(sql, READ)
+	local sql = 'select * from \"'..self.table..'\" '..self.query_sql .. ' ' .. limit_sql
+	local code,res = self:query(sql, READ)
 	if self.relation.local_key ~= nil then
-		return self:make_relations(res)
+		return code, self:make_relations(res)
 	end
-	return res
+	return code, res
 end
 
 --根据数据模型中的
 function _M:paginate(page_num, page_size)
 	page_num = page_num or 1
     page_size = page_size or 10
-	local sql, count_sql, total, code
+	local sql, count_sql, total, code, res
 	local data={
 		data = {},
-		next_page = 1,
-		prev_page = 1,
 		total = 0
 	}
 	if not self.query_sql then
-		sql = 'select * from \"'..self.table..'\" limit '..page_num..' offset '..page_size
+		sql = 'select * from \"'..self.table..'\" limit '..page_size..' offset '..(page_num - 1) * page_size
 		count_sql = 'select count(*) from \"'..self.table..'\"'
 	else
-		sql = 'select * from \"'..self.table .. '\" '..self.query_sql .. ' limit '..page_num..' offset '..page_size
+		sql = 'select * from \"'..self.table .. '\" '..self.query_sql .. ' limit '..page_size..' offset '..(page_num - 1) * page_size
 		count_sql = 'select count(*) from \"'..self.table..'\" '..self.query_sql
 	end
 	code, total = self:query(count_sql, READ)
 	if code == 0 then
 		data['total'] = tonumber(total[1]['count'])
-		data['data'] = self:make_relations(self:query(sql, READ))
 	end
-    --暂时没有理清下面的业务逻辑
-	if (table.getn(data['data']) + ((page_num - 1)* per_page)) < data['total'] then
-		data['next_page'] = page_num + 1
-	end
-	if tonumber(page_num) ~= 1 then
-		data['prev_page'] = page_num - 1
-	end
-	return data
+    code, res = self:query(sql, READ)
+    if code == 0 then
+        data['data'] = self:make_relations(res)
+    end
+	return code, data
 end
 
 --返回数据表中的第一条数据记录
 function _M:first()
 	if not self.query_sql then
 		ngx.log(ngx.ERR,'do not have query sql str')
-		return
+        return 2,nil
 	end
-	local sql = 'select * from '..self.table..' '..self.query_sql..' limit 1'
-	local res = self:query(sql, READ)
+	local sql = 'select * from \"'..self.table..'\" '..self.query_sql..' limit 1'
+	local code, res = self:query(sql, READ)
 	if next(res) ~= nil then
 		res = self:make_relations(res)
-		return res[1]
-	else
-		return false
+		return code, res[1]
 	end
+	return code, nil
 end
 
 --插入数据内容到数据表中
@@ -282,7 +275,7 @@ function _M:create(data)
 			values = values..','..value
 		end
 	end
-	return self:query('insert into '..self.table..'('..columns..') values('..values..')', WRITE)
+	return self:query('insert into \"'..self.table..'\"('..columns..') values('..values..')', WRITE)
 end
 
 function _M:with(relation)
@@ -313,18 +306,19 @@ end
 --根据id删除数据库中的数据记录
 function _M:delete(id)
 	id = id or nil
-	if not id then
-		-- 拼接需要delete的字段
-		if self.query_sql then
-			local sql = 'delete from '..self.table..' '..self.query_sql..' limit 1'
-			return self:query(sql, WRITE)
-		end
-		ngx.log(ngx.ERR,'delete function need prefix sql')
-		ngx.exit(500)
-	else
-		return self:query('delete from '..self.table..' where id=' .. id .. ' limit 1', WRITE)
-	end
-	return false
+    if not id then
+        -- 拼接需要delete的字段
+        if self.query_sql then
+            --postgres 数据库使用delete语句时不支持limit
+            --local sql = 'delete from \"'..self.table..'\" '..self.query_sql..' limit 1'
+            local sql = 'delete from \"'..self.table..'\" '..self.query_sql
+            return self:query(sql, WRITE)
+        end
+        ngx.log(ngx.ERR,'delete function need prefix sql')
+        return 2, nil
+    end
+    --return self:query('delete from '..self.table..' where id=' .. id .. ' limit 1', WRITE)
+    return self:query('delete from \"'..self.table..'\" where id='.. id, WRITE)
 end
 
 --软删除数据，不从数据表中删除记录，只将定义表中的字段值进行处理
@@ -343,7 +337,7 @@ function _M:update(data)
 	-- 拼接需要update的字段
 	local str = nil
 	for column,value in pairs(data) do
-		clean_value = transform_value(value)
+		local clean_value = transform_value(value)
 		if not str then
 			str = column..'='..clean_value
 		else
@@ -352,12 +346,13 @@ function _M:update(data)
 	end
 	-- 判断是模型自身执行update还是数据库where限定执行
 	if self.query_sql then
-		local sql = 'update '..self.table..' set '..str..' '..self.query_sql..' limit 1'
+        --postgres 数据库使用update语句时不支持limit
+		--local sql = 'update \"'..self.table..'\" set '..str..' '..self.query_sql..' limit 1'
+        local sql = 'update \"'..self.table..'\" set '..str..' '..self.query_sql
 		return self:query(sql, WRITE)
 	end
 	ngx.log(ngx.ERR,'update function cannot called without restriction')
-	ngx.exit(500)
-	return false
+	return 2, nil
 end
 
 --查询数据表中的数据记录
@@ -381,12 +376,10 @@ function _M:query(sql, type)
 			ngx.log(ngx.ERR, "write db error. res: " .. (code or "no reason"))
 			return code, nil
 		end
-		return code, result.affected_rows
-	else
-		ngx.log(ngx.ERR, 'type invalid, need ' .. READ .. ' or '..WRITE)
-		ngx.exit(500)
-        return 2, nil
+		return code, result
 	end
+	ngx.log(ngx.ERR, 'type invalid, need ' .. READ .. ' or '..WRITE)
+    return 2, nil
 end
 
 --获取需要隐藏的列