使用 App Engine 连接到 MySQL 数据库

Question

我正在关注 Google Cloud found here 的 MySQL 教程。我按原样复制了 main.py 中的代码，但出现以下错误：

File "D:\BitBucket\Code\main.py", line 44, in get db = connect_to_cloudsql() File "D:\BitBucket\Code\main.py", line 34, in connect_to_cloudsql db = MySQLdb.connect(host='127.0.0.1', user=CLOUDSQL_USER, passwd=CLOUDSQL_PASSWORD) File "C:\Python27\lib\site-packages\MySQLdb\__init__.py", line 81, in Connect return Connection(*args, **kwargs) File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 191, in __init__ super(Connection, self).__init__(*args, **kwargs2) TypeError: connect() argument 2 must be string, not None

我看到 connect_to_cloudsql() 需要接受两个参数，但我在文档中找不到任何指向什么的内容。

我的 app.yaml 看起来像这样：

  # application: reliance-it
  # # application: reliance-test
  # module: default
  # version: 5
  # runtime: python27
  # api_version: 1
  # instance_class: F2
  # threadsafe: true
  # automatic_scaling:
  #   min_idle_instances: 0
  #   max_idle_instances: automatic
  #   min_pending_latency: 30ms
  #   max_pending_latency: automatic

  application: reliance-group
  module: default
  version: 1
  runtime: python27
  api_version: 1
  threadsafe: yes

  env_variables:
      CLOUDSQL_CONNECTION_NAME: reliance-group:us-central1:cash-flow
      CLOUDSQL_USER: root
      CLOUDSQL_PASSWORD: p_ROOTadmin3

  libraries:
  - name: MySQLdb
    version: "latest"

  - name: webapp2
    version: latest
  - name: jinja2
    version: latest
  - name: pycrypto
    version: "2.6"
  - name: PIL
    version: latest

  inbound_services:
  - mail

  handlers:
  - url: /stylesheets
    static_dir: css
    mime_type: text/css
  - url: /scripts
    static_dir: js

  - url: /favicon\.ico
    static_files: css/images/favicon.ico
    upload: css/images/favicon.ico



  #========Default Handler=========
  - url: /.*
    script: main.application

Answer 1

原来CLOUDSQL_CONNECTION_NAME = os.environ.get('connection-name')的输出是None。只需用 CLOUDSQL_CONNECTION_NAME = 'connection-name' 替换它并对 CLOUDSQL_USER 和 CLOUDSQL_PASSWORD 做同样的事情就可以了。我希望遇到同样问题的人会发现我的回答对他们有所帮助。

使用 App Engine 连接到 MySQL 数据库

Connection to MySQL DB with App Engine

python

mysql

google-app-engine

mysql-python