报错信息:django.core.exceptions.ImproperlyConfigured: Requested setting LOGGING_CONFIG, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings. 解决办法:…
目录 Django重写用户模型报错has no attribute 'USERNAME_FIELD' 在重写用户模型时报错:AttributeError: type object 'UserProfile' has no attribute 'USERNAME_FIELD' Django重写用户模型报错has no attribute 'USERNAME_FIELD' 在重写用户模型时报错:AttributeError: type object 'UserProfile' has no attr…
问题 用Eclipse创建maven工程的时候,总是会报错,例如提示: Unable to create project from archetype [org.apache.maven.archetypes:maven-archetype-quickstart:1.1] The defined artifact is not an archetype 网上查找资料说是将 maven 下的repository下的 相关 lib 删除重建,但是试过了之后,发现没有用. 自己的解决方法: 将Ecli…
创建新项目自动执行时报错: Failed to import new Gradle project: failed to find Build Tools revision 17.0.0 Consult IDE log for more details (Help | Show Log) 可能是创建项目时Android Studio会连网下载Gradle进行项目配置,但在中国好像连接站点被强所以会报错,将Android Studio代理设置为自动,并将C:\Users\yourname\.gra…
好久没用Eclipse编写Java程序了,今天创建一个Java项目的时候,老报错,错误信息如下: Implicit super constructor Object() is undefined for default constructor. Must define an explicit constructor 解决方案:把java的类库加载进去,在工程上右键选择属性->Java Build Path的Libraries->Add Library选择JRE System Library-&…
https://blog.csdn.net/heybob/article/details/49684261 django代码下面直接run的时候报错: django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TABLESPACE, but settings are not configured. You must either define the environment variable DJAN…
练习Go修改字符串的时候遇到这个问题:cannot use "c" (type string) as type byte in assignment,代码如下: package main import "fmt" func main() { s := "hello" c := []byte(s) // 将字符串转为[]byte类型 c[0] = 'c' // byte用''单引号包括字符 不然报错cannot use "c"…
转换成json时使用的方法如下: json.dumps(list(models.userlist.objects.values("vu"))) 报错信息如下: Traceback (most recent call last): File "<console>", line 1, in <module> File "D:\Python36\lib\json\__init__.py", line 231, in dumps…
创建MAVEN项目pom.xml报错 Failure to transfer org.apache.maven:maven-archiver:jar:2.4.2 from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or upda…
在oracle修改user表字段name类型时遇到报错:“ORA-01439:要更改数据类型,则要修改的列必须为空”,是因为要修改字段的新类型和原来的类型不兼容. 如果要修改的字段数据为空时,则不会报这种类型的错误,可以进行字段类型的修改. alter table user modify (name varchar2(20)); 要修改字段的新类型和原来的类型不兼容时,可以通过如下方式解决该问题: 1.修改原字段名name为临时字段name_new: alter table user renam…