Knex与Postgres以非预期的方式存储时间戳

log*_*ins 5 postgresql node.js bookshelf.js knex.js

我在我的应用程序中使用Knex查询构建器和Postgres.我想在UTC时间中使用ISO8016格式的数据在我的数据库中添加created_atupdated_at字段.我想让我的数据看起来像这样:

2017-04-20T16:33:56.774Z
Run Code Online (Sandbox Code Playgroud)

在我的Knex迁移中,我尝试使用.timestamps()方法创建两者created_atupdated_at手动使用.timestamp() 方法并自己命名.

当我种子我的数据库,并设置created_atupdated_at等于moment().utc().toISOString(),但它在我的数据库,因为这存储:

2017-04-20 11:20:00.851-05
Run Code Online (Sandbox Code Playgroud)

代码和数据库之间存在一些改变数据的东西,我不知道它是Knex,Postgres节点库还是Postgres本身.

Mik*_*stö 2

Postgres 以内部格式存储时间戳,当您读取它时,它会以您请求的格式显示它。

knex_test=# update accounts set created_at = '2017-04-20T16:33:56.774Z';                                                                                                                                                                                                                                                  UPDATE 47
knex_test=# select created_at from accounts where id = 3;
         created_at         
----------------------------
 2017-04-20 19:33:56.774+03
(1 row)

knex_test=# \d accounts
                                       Table "public.accounts"
   Column   |           Type           |                          Modifiers                          
------------+--------------------------+-------------------------------------------------------------
 id         | bigint                   | not null default nextval('test_table_one_id_seq'::regclass)
 last_name  | character varying(255)   | 
 email      | character varying(255)   | 
 logins     | integer                  | default 1
 about      | text                     | 
 created_at | timestamp with time zone | 
 updated_at | timestamp with time zone | 
 phone      | character varying(255)   | 
Indexes:
    "test_table_one_pkey" PRIMARY KEY, btree (id)
    "test_table_one_email_unique" UNIQUE CONSTRAINT, btree (email)
    "test_table_one_logins_index" btree (logins)

knex_test=# 
Run Code Online (Sandbox Code Playgroud)

您可以更改 postgres 返回连接时间戳的时区

knex_test=# SET timezone = 'UTC';
SET
knex_test=# select created_at from accounts where id = 3;
         created_at         
----------------------------
 2017-04-20 16:33:56.774+00
(1 row)

knex_test=# 
Run Code Online (Sandbox Code Playgroud)

这是如何使用 knex 完成的https://github.com/tgriesser/knex/issues/97

var knex = Knex.initialize({
  client: 'pg',
  connection: {
    host     : '127.0.0.1',
    user     : 'your_database_user',
    password : 'your_database_password',
    database : 'myapp_test',
  },
  pool: {
    afterCreate: function(connection, callback) {
      connection.query('SET timezone = timezone;', function(err) {
        callback(err, connection);
      });
    }
 }
});
Run Code Online (Sandbox Code Playgroud)