I'm doing Django project, my issue is when I change colors in style.css file in static folder, the changes aren't reflecting on the website again the same old colors are coming.
ScreenShot of my project file directory
Unlike with Python files, Django doesn't automatically refresh the server each time a static file is updated. What most official sources recommend is running py manage.py collectstatic.
This often doesn't work (at least for me), but all CSS changes are usually implemented after a complete reboot.
So try saving, closing all your files, then restarting your computer. It's a simple workaround, but it's often reliable.
My Eclipse project uses Sass. When running in debug mode, sass:watch (configured per this article) correctly polls for changes to *.scss files, compiles them into CSS and places them in the target directory. However, these changes are not reflected on the page, and inspecting the page using Chrome developer tools shows the new CSS is not picked up.
Using another (CSS-only) project works as expected: any change to CSS is copied to target directory, and a refresh of the page reflects the proper change.
I ran across a similar issue someone had using LESS. Unlike that situation, though, even changing the target CSS directly, the change is not reflected in the browser.
I can't be the only person debugging Sass/CSS in Eclipse, but I can't find any info on this problem.
Any ideas on how to fix this?
EDIT: SCSS is being compiled to CSS and copied to the target build directory, but not into the Tomcat deployment where the code is running. As I've said, this is not an issue with CSS-based projects, only with this where it's a compiled file.
Solved the problem...
An entry needed to be added to Eclipse’s Web Deployment Assembly so that Eclipse would see this dynamically-generated folder and associate it with the project.
The files were being generated to the local_repo/target/branch_name directory, where branch_name was dynamic, and dependent upon what branch you were working on; this made it impossible to create a static entry in Eclipse WDA for us.
Our solution was to have Maven (1) create a sass-generated/css directory under local_repo/target, and (2) copy the css over into the branch_name/static directory where it belongs.
Now, when debugging locally and running Sass Watch, changes to *.scss files are detected, compiled to css, and deployed to the sass-generated/css directory. Since this dir is associated with the project in Eclipse WDA, Eclipse sees the change and deploys it to Tomcat as expected!
I have an application that was created from create_react_app then ejected, with no modifications.
Everything works as expected when running the dev version.
Unfortunately when I do npm run build and run this via serve -s build my styles are not working.
The .css files are being found and compiled into a single minified version. But the problem is that the markup that is generated is having the class name prefixes changed to 'T-' instead of the prefix in the compiled .css file. (i.e) MyApp-header is getting changed to T-header, but in the minified css file, it still refers to MyApp-header.
prefix changed to T-
Any help would be appreciated.
This issue turned out to be caused by some nuance of using this...
#SuitCssify.decorator
I was evaluating this library for potential use in a project, and didn't discover this issue until trying to produce an actual production build.
I've since abandoned this approach and changed my configuration to use "CSS Modules" which are working out great. I would provide a link, but my reputation only allows me one link per post. ;(
my 'webpack.config.[dev & prod].js' changes to enable css modules
I'm using SquishIt and have a .less file which I add to a CSS bundle with the following line
.Add("~/content/styles/dev.less")
This compiles as dev.less.debug.css when I build the solution, however I'd like to be able to just save the .less file and it automatically compiles the css (so I see the change instantly in my browser as I would with a traditional CSS file).
I have looked at a number of extensions to achieve this (such as LessExtension and LessCssForVisualStudio) but these require the file to be added to the bundle as dev.css rather than dev.less. Mindscape Web Workbench does not compile LESS files in its free version so I do not know if it also requires dev.css.
I can't change the link to the file as the project will be worked on across teams, where some won't install an extension and will be happy to build the solution to compile.
Is there and extension that automatically compiles LESS that is built to work with SquishIt?
If you use it on non-production site, I would suggest using less.js (It will render css with js on client-side).
Squishit uses dotless under the hood, so you could use that directly.. either set it up so that you request the less file and a handler returns CSS or you can use the exe to compile on build and also the watch mode... I'm not sure what's best for you, but you can find more information on the dotless wiki (https://github.com/dotless/dotless/wiki/Using-.less)
Web essentials does this job perfectly and its free.
http://vswebessentials.com/
I'm trying to access a MySql database from a Qt application but I get the following error:
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QSQLITE2
I find this very strange cause I have libqsqlmysql.so on my Qt folder. I have even tried to compile the MySql driver as a static plugin and add it to my .pro file as:
QTPLUGIN += qsqlmysql
But this also generates the same runtime error (it must've found the plugin cause there's no error compiling the application)
What am I missing? I would like to avoid having to compile Qt from source cause this will have to work seamlessly on the deploy machines as well.
BTW: Even though I'm developing and testing on Linux I will need to support Windows. Will I experience this same issue on Windows? How can I compile and link the MySql driver in both Linux and Windows?
The solution:
After following #Sergey's recommendations I did an strace of the application redirecting the output to grep so I could search for 'mysql' and for my surprise the application wasn't looking for the plugin at QTDIR/plugins/sqldrivers where I had libqsqlmysql.so, it was looking at QTDIR/lib. After copying the plugin to the lib folder the MySql connection worked.
Try opening the shared library with dlopen() and see if it loads and if not, what dlerror() tells you. I always run into similar problems on Windows. LoadLibrary()/GetLastError() saved me numerous times (last time it was because of a wrong version of some libiconv/libintl DLL). Running ldd on the plugin may also help.
If dlopen() works fine, try to load the plugin with QPluginLoader. If it doesn't load, then check the buildkey of the plugin. I usually do it the dirty way by running strings on the plugin and then looking for strings like "buildkey" or "QT_PLUGIN_VERIFICATION_DATA". Just looking at the build key and around it may give you an idea. For example, you may realize that you have compiled your plugin in the release mode while your application is compiled in the debug mode. In such case the build key won't match and the plugin won't load. Everything in the build key must match your configuration. Note that the version and the build key are checked differently: the build key must match exactly (or match some black magic called QT_BUILD_KEY_COMPAT), but in the version only the major version must match exactly, the minor version must be the version of Qt the plugin was compiled with or later and the patch level is ignored. So if your plugin was compiled with Qt 4.x.y then it will work with Qt versions 4.z.* where z>=x. This actually makes sense.
If the build key looks okay (which is unlikely if you got to this point), you may wish to look at QLibraryPrivate::isPlugin() source code to figure out what's wrong, but that doesn't look like an easy task to me (although running this in a debugger may help).
If QPluginLoader does load the plugin, check if it is in the right directory and has correct permissions. If you still didn't solve the problem by this point, it's time to look at the SQL module source code that actually loads these plugins. But it is extremely unlikely. I ran into this problem many, many times and it was always either the library not loading or the build key not matching.
Another way to go after QPluginLoader loads the plugin successfully is to use strace to figure out whether the program at least tries to open the plugin file. Searching for something like "sqldrivers" or "plugins" in the strace output should also give away the directory where Qt is searching for its plugins and specifically SQL drivers.
Update
Is it possible to compile the driver as a static plugin and don't worry about anything? Let's try:
d:\Qt4\src\plugins\sqldrivers\psql>qmake CONFIG+=static LIBS+=-Ld:/programs/Post
greSQL/lib INCLUDEPATH+=d:/programs/PostgreSQL/include
d:\Qt4\src\plugins\sqldrivers\psql>make
It compiles fine and now I got libqsqlpsql.a (release) and libqsqlpsqld.a (debug) in QTDIR/plugins/sqldrivers (it is the right place on Windows). I am using PostgreSQL driver here, but I don't think it will be any different for MySQL which I just don't have installed. Ok, let's compile some real program with it:
d:\alqualos\pr\archserv>qmake QTPLUGIN+=qsqlpsql PREFIX=d:/alqualos LIBS+=-Ld:/g
nu/lib INCLUDEPATH+=d:/gnu/include LIBS+=-Ld:/programs/PostgreSQL/lib LIBS+=-lpq
Note that I had to manually link to libpq, otherwise the linker would complain about undefined references. The funny thing is, qmake knows that qsqlpsql is located in QTDIR/plugins/sqldrivers and sets compiler and linker options accordingly. So it still needs to be in the right place to work, only you don't have to worry about your users running into the same problem as it is only used during compilation. An alternative would be to just use LIBS+=-Lpath/to/plugin LIBS+=-lqsqlpsql instead of QTPLUGIN+=qsqlpsql, at least the docs say that it should work, but I haven't tested it.
In order for the application to actually use the plugin I had to put the following in my main unit (CPP file):
#include <QtPlugin>
Q_IMPORT_PLUGIN(qsqlpsql)
It works! Also, from what I've been able to figure out from the sources, the build key and the version are checked only when a plugin is dynamically loaded (all the relevant stuff is in the QLibrary's private class, not even QPluginLoader's). So the resulting executable may (or may not, depending on the binary compatibility) work even with different versions and builds of Qt, although using it with older versions may trigger some bugs that were fixed later.
It is also worth noting that the order for loading SQL drivers is this: use the driver statically linked into Qt if available, then look for a driver registered manually with QSqlDatabase::registerSqlDriver(), then look for a driver statically imported into the application (the way described above), and finally try to load a shared plugin. So when you link statically, your users won't be able to use dynamically linked drivers they may already have, but will be able to use drivers linked statically into Qt (like in Ubuntu).
I compiled QT first and then realised that I need mysql as well. So I compiled mysql plugin by
executing following command in QT-DIR\src\plugins\sqldrivers\mysql folder.
Mysql plugin compile command
qmake "INCLUDEPATH+=$$quote(C:\Program Files\MySQL\MySQL Server 5.5\include)" "LIBS+=$$quote(C:\Program Files\MySQL\MySQL Server 5.5\lib\libmysql.lib)" mysql.pro
Plugings are then created in created in folder QT-DIR\plugins\sqldrivers.
However, when I tried to use it in my code. It failed with following error.
Error msg
QSqlDatabase: QMYSQLDriver driver not loaded
Solution
After some googling and checking Path variable I realised that the Mysql server lib
( C:\Program Files\MySQL\MySQL Server 5.5\lib) directory was not in my Path variable. I expect that the dll in this folder are used by the plugin at runtime. After including Mysql server lib in Path variable everything worked smoothly. Hope this information saves some hair on other programmers scalp, as I uprooted quite a few. :D
Last time I looked at this you needed to rebuild Qt from source and include the appropriate MySQL source.
Building Qt from the sources is not hard, it just takes a while. You are likely to have the required tools already.
A possible workaround may be to access the back-end over ODBC instead.
In order for your app to pick up the plugin at runtime, the shared library implementing the MySQL plugin needs to be placed in the correct directory. The best way of determining that directory is to check the output of QCoreApplication::libraryPaths. You can also force specific paths by using a qt.conf file.
Please note that plugins must be placed in subdirectories within the plugin path, and the final part of the path name (i.e., the parent directory of the shared libraries) cannot be changed. SQL drivers need to go in a directory named sqldrivers, i.e. <pluginpath>/sqldrivers. For more details on plugin directories, see How to Create Qt Plugins.
I was experiencing this same issue as well. I've been installing and experimenting with a lot of different Python tools and UIs. I then uninstalled everything python related. I did a fresh install of Python 3.2, PyQT 3.2, and Eric5. No more errors with the QMySQL driver.
well i have had this issue, and after a lot of time, and different tools, i found that QT ( on windows, have not been able to test on Linux.) loads the "QSQLMYSQL.." when requested, but before runtime the lib ("QSQLMYSQL..") file must reside on one of the searched paths (QApp.libraryPaths()) inside a folder called "sqldrivers".. otherwise QT will just ignore the file, even if it is at some other point inside the searched path.
what i did was to monitor the dependency of a sample app, and when i removed the "QSQLMYSQL.." dll from "plugins\sqldrivers\" it failed, but when i maded a folder inside the app folder, called "sqldrivers" and placed the "QSQLMYSQL..." inside there, it loaded.
what i have is mysql 5.5, qt 4.7.4.
hope anyone can use this, and if anyone knows more about it, i would like to know where to find it(http://doc.qt.nokia.com/stable/sql-driver.html, is the closest you can get to the information about the folder structur). :P
This may also happen if your QMYSQL plugin is linked against the "wrong" mysql_client.a or it isn't in the LD_LIBRARY_PATH. I had this problem on OSX because mysql was installed via ports, and I fixed it with:
install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient_r.18.dylib libqsqlmysql.dylib