django 和 mysql的一次troubleshooting
时间：2022-03-10 17:29
下面是一次用django连接mysql的经历，记录下来也许以后会有帮助。
首先是用django的./manage.py syncdb 去连接mysql
-bash-3.2$ ./manage.py syncdbTraceback (most recent call last): File
"./manage.py", line 10, in
<module> execute_from_command_line(sys.argv) File
"/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in
execute_from_command_line utility.execute() File
"/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in
execute self.fetch_command(subcommand).run_from_argv(self.argv) File
"/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 242, in
run_from_argv self.execute(*args, **options.__dict__) File
"/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 280, in
execute translation.activate(‘en-us‘) File
"/usr/local/lib/python2.7/site-packages/django/utils/translation/__init__.py", line 130, in
activate return
_trans.activate(language) File
"/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 188, in
activate _active.value =
translation(language) File
"/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 177, in
translation default_translation =
_fetch(settings.LANGUAGE_code) File
"/usr/local/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 159, in
_fetch app =
import_module(appname) File
"/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in
import_module __import__(name) File
"/usr/local/lib/python2.7/site-packages/django/contrib/admin/__init__.py", line 6, in
<module> from
django.contrib.admin.sites import
AdminSite, site File
"/usr/local/lib/python2.7/site-packages/django/contrib/admin/sites.py", line 4, in
<module> from
django.contrib.admin.forms import
AdminAuthenticationForm File
"/usr/local/lib/python2.7/site-packages/django/contrib/admin/forms.py", line 6, in
<module> from
django.contrib.auth.forms import
AuthenticationForm File
"/usr/local/lib/python2.7/site-packages/django/contrib/auth/forms.py", line 17, in
<module> from
django.contrib.auth.models import
User File
"/usr/local/lib/python2.7/site-packages/django/contrib/auth/models.py", line 48, in
<module> class
Permission(models.Model): File
"/usr/local/lib/python2.7/site-packages/django/db/models/base.py", line 96, in
__new__ new_class.add_to_class(‘_meta‘, Options(meta, **kwargs)) File
"/usr/local/lib/python2.7/site-packages/django/db/models/base.py", line 264, in
add_to_class value.contribute_to_class(cls, name) File
"/usr/local/lib/python2.7/site-packages/django/db/models/options.py", line 124, in
contribute_to_class self.db_table =
truncate_name(self.db_table, connection.ops.max_name_length()) File
"/usr/local/lib/python2.7/site-packages/django/db/__init__.py", line 34, in
__getattr__ return
getattr(connections[DEFAULT_DB_ALIAS], item) File
"/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 198, in
__getitem__ backend =
load_backend(db[‘ENGINE‘]) File
"/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 113, in
load_backend return
import_module(‘%s.base‘
% backend_name) File
"/usr/local/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in
import_module __import__(name) File
"/usr/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 17, in
<module> raise
ImproperlyConfigured("Error loading MySQLdb module: %s"
%
e)django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb |
这里面最重要的就是最后一句 No module named MySQLdb. 这说明MySQL-python这个package没有安装成功。于是用pip2.7 install MySQL-python来安装，但是遇到如下错误。
[root@kramer site-packages]# pip2.7 install MySQL-pythonDownloading/unpacking MySQL-python Downloading MySQL-python-1.2.5.zip
(108kB): 108kB
downloaded Running setup.py (path:/tmp/pip_build_root/MySQL-python/setup.py) egg_info for
package MySQL-pythonInstalling collected packages: MySQL-python Running setup.py install for
MySQL-python building ‘_mysql‘
extension gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -Dversion_info=(1,2,5,‘final‘,1) -D__version__=1.2.5
-I/usr/include/mysql -I/usr/local/include/python2.7
-c _mysql.c -o build/temp.linux-x86_64-2.7/_mysql.o -g -pipe -Wp,-D_FORTIFY_SOURCE=2
-fexceptions -fstack-protector --param=ssp-buffer-size=4
-m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64
-D_LARGEFILE_SOURCE -fno-strict-aliasing -fwrapv _mysql.c:44:23: error: my_config.h: No such file
or directory _mysql.c:46:19: error: mysql.h: No such file
or directory _mysql.c:47:26: error: mysqld_error.h: No such file
or directory _mysql.c:48:20: error: errmsg.h: No such file
or directory |
这个错误很长所以只截取一小段来看。发现都是c/c++的头文件找不到，这一般是因为某个dev的包没有找到。在linux上你安装一个软件的时候这个软件通常有两部分，一个是dev包一个是应用包。如果你只要使用的话安装应用包就可以了，但是某些情况下需要dev包。 这里是mysql的一些头文件找不到所以我们应该安装mysql的dev包。 猜测名字应该是类似于mysql-devel
[root@kramer site-packages]# yum install mysql-develLoaded plugins: fastestmirrorLoading mirror speeds from
cached hostfile *
base: mirror.tocici.com *
extras: mirror.tocici.com *
updates: mirror.tocici.comSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package mysql-devel.i386 0:5.0.95-5.el5_9
set to be updated---> Package mysql-devel.x86_64 0:5.0.95-5.el5_9
set to be updated--> Finished Dependency ResolutionDependencies Resolved======================================================================================================================================================================== Package Arch Version Repository Size========================================================================================================================================================================Installing: mysql-devel i386 5.0.95-5.el5_9
base 2.4
M mysql-devel x86_64 5.0.95-5.el5_9
base 2.5
MTransaction Summary========================================================================================================================================================================Install 2
Package(s)Upgrade 0
Package(s)Total download size: 4.9
MIs this ok [y/N]: yDownloading Packages:(1/2): mysql-devel-5.0.95-5.el5_9.i386.rpm | 2.4
MB 00:00(2/2): mysql-devel-5.0.95-5.el5_9.x86_64.rpm | 2.5
MB 00:00------------------------------------------------------------------------------------------------------------------------------------------------------------------------Total 6.5
MB/s | 4.9
MB 00:00Running rpm_check_debugRunnin
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