定义GAE项目的通用文件 [英] Define common files for GAE projects

问题描述

我在Google App Engine帐户中有两个不同的项目.我计算机中的文件夹结构如下:

I have two different projects in Google app engine account. The folders structure in my computer is as following:

• parent_folder
  • common_folder
  • project1_folder
  • project2_folder

  在common_folder中我想在两个项目(project1和project2)中使用的python类很少.

  I have few python classes in common_folder that I want to use in both projects (project1 and project2).

  我想将通用类导入到我的项目中，因此Google App Engine也会在Production env上识别它们(也许GAE可以在上传时创建通用文件的副本?)

  I want to import the common classes into my projects, so Google App Engine will recognize them also on Production env (maybe GAE can create a copy of the common files when uploading?)

  我尝试使用以下代码从特定的父目录路径导入我的课程:

  I tried using the following code in order to import my class from a specific parent directory path:

  import os
  PARENT_DIR = os.path.dirname(os.path.dirname(__file__))
  print PARENT_DIR
  def load_src(name, fpath):
      import os, imp
      return imp.load_source(name, os.path.join(os.path.dirname(__file__), fpath))
  
  load_src("globals", PARENT_DIR +"/common/globals.py")
  from globals import *
  

  此代码仅在我的本地主机环境中有效，但是当我将其上传到GAE时，它无法识别该类:

  This code worked only from my localhost environment but when I uploaded it to GAE, it didn't recognize the class:

  > File
  > "/base/data/home/apps/s~loan-management-system/1.394267205500555512/main.py",
  > line 39, in load_src
  >     return imp.load_source(name, os.path.join(os.path.dirname(__file__), fpath)) IOError: [Errno 2] No
  > such file or directory
  

  推荐答案

  出现此错误的原因是，在部署期间，模块/服务目录(或单个模块应用程序的应用程序目录)上方没有任何内容上载到GAE.

  The reason for the error you see is that nothing above the module/service dir (or app dir for single module apps) is uploaded to GAE during deployment.

  您可以在应用程序目录中符号链接必要的文件，请参见 https://stackoverflow.com/a/34291789/4495081 .部署实用程序知道遵循符号链接，并在部署中包括公用文件夹包.

  You can symlink the necessary file(s) inside your app dirs, see https://stackoverflow.com/a/34291789/4495081. The deployment utility knows to follow the symlink and include the common folder package in the deployment.

  我建议将公用文件夹打包(添加 __ init __.py 文件)，然后再

  I would suggest making the common folder a package (add a __init__.py file) then vendor it in inside each application but instead of copying/installing the code just symlink the common code dir inside the lib dir.

  然后，您无需手动摆弄路径，在您的应用中，您只需要使用类似的类(例如，假设 MyClass 来自 common_folder/class.py ):

  Then you don't need to fiddle with the path manually, in your app you'd just use the classes like this (assuming for example that MyClass comes from common_folder/class.py):

  from common_folder.class import MyClass
  

  这篇关于定义GAE项目的通用文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！