Django 1.7迁移 [英] Django 1.7 Migrations

问题描述

我正在使用django 1.7，我刚刚添加了一个自定义用户模型。当我运行 python3 manage.py makemigrations 或 python3 manage.py migrate 我得到错误： TypeError：__init __（）得到了一个意想不到的关键字参数preserve_default。添加新的自定义用户模型后出现此问题。完整的追溯是：

 追溯（最近的最后一次呼叫）：
文件manage.py，第10行，< module> 
 execute_from_command_line（sys.argv）
文件/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py，第385行，execute_from_command_line 
 utility.execute（）
文件/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py，第377行，执行
 self.fetch_command （子命令）.run_from_argv（self.argv）
文件/usr/local/lib/python3.4/dist-packages/django/core/management/base.py，第288行，在run_from_argv 
 self.execute（* args，** options .__ dict__）
文件/usr/local/lib/python3.4/dist-packages/django/core/management/base.py，第338行，执行
 output = self.handle（* args，** options）
文件/usr/local/lib/python3.4/dist-packages/django/core/management/commands/migrate.py ，第63行，在句柄
 executor = MigrationExecutor（connection，self.migration_progress_callback）
文件/usr/local/lib/python3.4/dist-packages/django/db/migrations/executor。 py，第17行，__init__ 
 self.loader = MigrationLoader（self.connection）
文件/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py，第48行，__init__ 
 self.build_graph（）
文件/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py，第173行，build_graph 
自身.load_disk（）
文件/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py，第103行，在load_disk 
 migration_module = import_module（ ％s。％s％（module_name，migration_name））
文件/usr/lib/python3.4/importlib/__init__.py，第109行，import_module 
 return _bootstrap._gcd_import（name [level：]，package，level）
文件< frozen importlib._bootstrap>，第2231行，_gcd_import 
文件< frozen importlib._bootstrap>，第2214行，_find_and_load 
文件< frozen importlib._bootstrap>，第2203行，_find_and_load_unlocked 
文件< frozen importlib._bootstrap>，第1200行，_load_unlocked 
文件< frozen importlib._bootstrap>，第1129行，在_exec 
文件< frozen importlib._bootstrap>，行1448，在exec_module 
文件< frozen importlib._bootstrap第321行，在_call_with_frames_removed 
文件/home/denny/workspace/teenvestor/core/migrations/0003_auto_20141017_1749.py中，第7行在< module> 
 class Migration（migrations.Migration）：
文件/home/denny/workspace/teenvestor/core/migrations/0003_auto_20141017_1749.py，第46行，Migration 
 preserve_default = True，
 TypeError：__init __（）得到一个意想不到的关键字参数'preserve_default'
  

解决方案

Django 1.7.1在AlterField中添加了对preserve_default参数的支持。因此，从1.7版本升级Django将解决问题。

pip install django --upgrade
python manage.py migrate


I am using django 1.7 and I just added a custom user model. When I run either python3 manage.py makemigrations or python3 manage.py migrate I get the error: TypeError: __init__() got an unexpected keyword argument 'preserve_default'. This issue came along after adding the new custom user model. The complete traceback is:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python3.4/dist-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python3.4/dist-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python3.4/dist-packages/django/core/management/commands/migrate.py", line 63, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/usr/local/lib/python3.4/dist-packages/django/db/migrations/executor.py", line 17, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py", line 48, in __init__
    self.build_graph()
  File "/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py", line 173, in build_graph
    self.load_disk()
  File "/usr/local/lib/python3.4/dist-packages/django/db/migrations/loader.py", line 103, in load_disk
    migration_module = import_module("%s.%s" % (module_name, migration_name))
  File "/usr/lib/python3.4/importlib/__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2231, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2214, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2203, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1129, in _exec
  File "<frozen importlib._bootstrap>", line 1448, in exec_module
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "/home/denny/workspace/teenvestor/core/migrations/0003_auto_20141017_1749.py", line 7, in <module>
    class Migration(migrations.Migration):
  File "/home/denny/workspace/teenvestor/core/migrations/0003_auto_20141017_1749.py", line 46, in Migration
    preserve_default=True,
TypeError: __init__() got an unexpected keyword argument 'preserve_default'

解决方案

Django 1.7.1 added support for the preserve_default param in AlterField. Therefore an upgrade of Django from version 1.7 will resolve the issue.

pip install django --upgrade python manage.py migrate

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