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Fixing the error: error: pg_config executable not found
The cause: I think this error occurs because you haven't installed libpq-dev/postgresql-libs. The solution: To connect with a PostgreSQL database backend, you must install libpq-dev/postgresql-libs, which contains header files and a static library for generating C applications to link with the libpRead more
The cause: I think this error occurs because you haven’t installed libpq-dev/postgresql-libs.
The solution: To connect with a PostgreSQL database backend, you must install libpq-dev/postgresql-libs, which contains header files and a static library for generating C applications to link with the libpq library.
On Arch this will run:
On Debian and Ubuntu:
On Mac OS X:
On Red Hat/CentOS/Fedora:
Steps to fix the error “error: no default engine was specified and no extension was provided”
The cause: I think the cause of this error is that you used the below: app.get('/', (req, res) => res.render('Hellooooo')) The solution: You should change it into: app.get('/', (req, res) => res.send('Hellooooo'))
The cause: I think the cause of this error is that you used the below:
The solution: You should change it into:
Steps to fix the error “error adding symbols: dso missing from command line”
The cause: I think the cause of this error is that you don't mention the library on the command line before the object files being compiled. The solution: After the object files are compiled, you should mention the library on the command line: gcc -Wstrict-prototypes -Wall -Wno-sign-compare -WpointeRead more
The cause: I think the cause of this error is that you don’t mention the library on the command line before the object files being compiled.
The solution: After the object files are compiled, you should mention the library on the command line:
Explanation: The sequence of modules affects the linkage. Symbols are requested first, then linked in from a library with them. As a result, you must identify modules that use libraries first, followed by libraries. As an example:
Error: django.core.exceptions.appregistrynotready: apps aren’t loaded yet – how to solve it?
The cause: Your wsgi.py will be used by ./manage.py runserver, but it appears that the stack trace you provided at the beginning does not include the wsgi file. As a result, the error occurs before the wsgi file has been loaded. I'm wondering whether there's something wrong with your setup because yRead more
The cause: Your
wsgi.py
will be used by./manage.py runserver
, but it appears that the stack trace you provided at the beginning does not include the wsgi file. As a result, the error occurs before the wsgi file has been loaded.I’m wondering whether there’s something wrong with your setup because you appear to be using the new style wsgi and you note that “the django version on the server is 1.8.5, and the local is 1.8.1”.
The solution: The following are the steps I recommend:
pip install -r requirements.txt
or something similar.Can i fix the “could not find a part of the path” error or not?
The cause: Something isn't right. You have written the following: string source_dir = @"E:\\Debug\\VipBat\\{0}"; And the error occurs. The solution: To solve this problem, you need to change it into: string source_dir = @"E:\Debug\VipBat"; // remove {0} and the \\ if using @ or string source_dir = "Read more
The cause: Something isn’t right. You have written the following:
And the error occurs.
The solution: To solve this problem, you need to change it into:
or
How to deal with the configuration information could not be read from the domain controller errors?
The cause: I think this error can be caused due to several causes: The first issue is that you are not conducting the action with the admin account, resulting in the Configuration Information Could Not Be Read From The Domain Controller windows error. Second, it's possible that you're usinRead more
The cause: I think this error can be caused due to several causes:
The solution: To solve this problem, trying turn off the wifi, then turn back on, and create a new password to connect with. After that, in order to update your credentials, Windows prompted you to lock and unlock your Windows session.
Simple solutions for the column count doesn’t match value count at row 1 error
The cause: This error happens because you are not supplying as much information as the table wp posts does. Now the DB engine is stumped as to where to put your data. The solution: You can fix the problem by supplying the names of the columns that are affected. > INSERT INTO table_name (column1,cRead more
The cause: This error happens because you are not supplying as much information as the table
wp posts
does. Now the DB engine is stumped as to where to put your data.The solution: You can fix the problem by supplying the names of the columns that are affected.
Please notice that the semi colon should only be used after the value declaration.
How to avoid the error “cannot delete or update a parent row: a foreign key constraint fails”?
The cause: I think the cause is that you must delete the advertisers table row before you can delete the jobs table row that it refers to. This: ALTER TABLE `advertisers` ADD CONSTRAINT `advertisers_ibfk_1` FOREIGN KEY (`advertiser_id`) REFERENCES `jobs` (`advertiser_id`); is the exact opposite of wRead more
The cause: I think the cause is that you must delete the advertisers table row before you can delete the jobs table row that it refers to. This:
is the exact opposite of what should be done. As is, you’d have to have a record in the jobs table before the advertisers.
The solution: You need to do as the following:
Your delete statement will operate after you fix the foreign key relationship.
Steps to fix the error “ does not name a type in c++”
The cause: I think the cause is that C++ compilers only process input once. Each class you use has to be defined first. But you use MyMessageBox before you define it. The solution: Before you use the prototype, you must declare it. It means that you need to swap the types as the following: class UsRead more
The cause: I think the cause is that C++ compilers only process input once. Each class you use has to be defined first. But you use
MyMessageBox
before you define it.The solution: Before you use the prototype, you must declare it. It means that you need to swap the types as the following:
Is there any solution for the class name does not name a type c++ error?
The cause: I think this error happens because the contents of the files A.h and B.h are pasted into the include statement by the preprocessor. When the compiler parses A.cpp, the declaration of class A will be found before it knows about class B. The solution: There are two options for dealing withRead more
The cause: I think this error happens because the contents of the files
A.h
andB.h
are pasted into the include statement by the preprocessor. When the compiler parsesA.cpp
, the declaration of classA
will be found before it knows about classB
.The solution: There are two options for dealing with this:
B.h
inA.h
. Header files should be included in the files where they are required. You and others will be confused as the project expands if you rely on indirect inclusion through another header or a special order of includes in the compilation unit (cpp-file).A
, if a member variable of typeB
is used in classA
, the compiler has to know the exact and complete definition ofB
. Nevertheless, a forward declaration would work if you were using a pointer or reference toB
, because the memory the compiler has to reserve for a pointer or reference is independent of the class definition. This is how it would look:This will help avoid circular header dependencies.