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  • Django: accessing session variables from within a template?

    - by AP257
    Hi all If I set a session variable in Django, like: request.session["name"] = "name" Is there a way I can access it from within a template, or do I have to retrieve it from within a view, and then pass it to a template? Asking because I have around 10 little session variables that I'd like to access within a template, and passing all 10 from the view to the template could get a bit messy. (I have to use session variables because it's a HttpResponseRedirect, but storing the variables in a database is overkill for my purposes.) So - any way to grab session variables directly within a template?

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  • Function template overloading: link error

    - by matt
    I'm trying to overload a "display" method as follows: template <typename T> void imShow(T* img, int ImgW, int ImgH); template <typename T1, typename T2> void imShow(T1* img1, T2* img2, int ImgW, int ImgH); I am then calling the template with unsigned char* im1 and char* im2: imShow(im1, im2, ImgW, ImgH); This compiles fine, but i get a link error "unresolved external symbol" for: imShow<unsigned char,char>(unsigned char *,char *,int,int) I don't understand what I did wrong!

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  • c++ defining a static member of a template class with type inner class pointer

    - by Jack
    I have a template class like here (in a header) with a inner class and a static member of type pointer to inner class template <class t> class outer { class inner { int a; }; static inner *m; }; template <class t> outer <t>::inner *outer <t>::m; when i want to define that static member i says "error: expected constructor, destructor, or type conversion before '*' token" on the last line (mingw32-g++ 3.4.5)

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  • Will Django user permissions work for models with inline tabular forms of other models?

    - by stinkypyper
    I am setting up DJango admin to make a model editable. On the same page I have tabular inline of a child model. Everything works as expected. Now I want to restrict permission on the tabular inline child form. Specifically remove update and delete permissions on it. I have tried removing the permissions for the admin user using the 'user permissions' of that user. However, it does not work. Does DJango respect the user permissions in regards to inline model forms?

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  • Detect template presence at compilation time

    - by doublep
    GCC up to 4.5 doesn't have standard C++0x type trait template has_nothrow_move_constructor. I could use it in my package for optimization, but I don't want to rule out one of the common compilers and don't want to overload configuration with symbols like HAVE_STD_HAS_NOTHROW_MOVE_CONSTRUCTOR. Is it somehow possible to use that template if present and just fall back to copying if not present without using any predefined configuration symbols? I also don't want to depend on Boost, since my library is small and doesn't need Boost for any other reasons. In pseudocode, I need something like: template <typename type> struct has_nothrow_move_constructor_robust : public integral_constant <bool, /* if possible */ has_nothrow_move_constructor <type>::value /* otherwise */ false> { }; Since move constructors are only for C++0x anyway, I don't mind using other C++0x features for the above definition, if at all possible.

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  • Cannot refer to a template name nested in a template parameter

    - by chila
    I have the following code: template <typename Provider> inline void use() { typedef Provider::Data<int> D; } Where I'm basically trying to use a template class member 'Data' of some 'Provider' class, applied to 'int', but I get the following errors: util.cpp:5: error: expected init-declarator before '<' token util.cpp:5: error: expected `,' or `;' before '<' token I'm using GCC 4.3.3 on a Solaris System.

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  • C# template engine

    - by me
    Hi! I am looking for a stand-alone, easy to use from C# code, template engine. What I want to do is create an html and xml files with placeholders for data, and fill them with data from my code. The engine needs to support loops (duplicating parts of the template form more that one object) and conditions (add parts of the template to the final html/xml only if some conditions are true). Can someone recommend a good option for me, and add a link to more-or-less such code sample, and some documentation about how to use the recommended component for my needs? Thanks:) Just wanted to add one more thing - I also need to use loops to duplicate table rows, or even entire tables (in the html version) and complex elements (in the xml version) Thanks again:)

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  • How to migrate Django models from mysql to sqlite (or between any two database systems)?

    - by Daphna Shezaf
    I have a Django deployment in production that uses MySQL. I would like to do further development with SQLite, so I would like to import my existing data to an SQLite database. I There is a shell script here to convert a general MySQL dump to SQLite, but it didn't work for me (apparently the general problem isn't easy). I figured doing this using the Django models must be much easier. How would you do this? Does anyone have any script to do this?

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  • Why is Django sending the wrong email template?

    - by Mark
    I'm so baffled... I keep staring at this code, looking for the typo, but I can't find it! template = 'emails/transporter_joined' tt = loader.get_template(template+'.txt') c = Context({'user':user, 'fee': settings.FEE * Decimal('100.00'),'settings':settings}) e = EmailMultiAlternatives('Activate Your Account', tt.render(c), '[email protected]', [user.email]) try: ht = loader.get_template(template+'.html') e.attach_alternative(ht.render(c), 'text/html') except: pass e.send() First it should load the 'emails/transporter_joined.txt' template, and adds that to the email. And then it tries to load a '.html' version and attaches that too. In Gmail you can see the the "original email" with both emails, and all the headers in plain text. It very clearly shows the .txt version twice. the .html and .txt files are definitely different. What am I doing wrong here? If I replace this tt = loader.get_template(template+'.txt') With .html instead, then it sends the .html twice... it must be Django that's screwing up, no?

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  • Theme the node-create and node-edit template

    - by Toxid
    I'm using drupal 6. I've managed to make a .tpl file for one content type, that is for images in my image gallery. I did that by adding this code in template.php: function artbasic_theme($existing, $type, $theme, $path) { return array( 'galleryimage_node_form' => array( 'arguments' => array('form' => NULL), 'template' => 'galleryimage_node_form' ) ); } And then I created galleryimage_node_form.tpl.php, and was good to go. Now it happens so that I want to have other template files for the forms of other content types, for example link_contrib_node_form.tpl.php. I've tried a couple of ways to change this function to include more content types, but I can't figure it out. Can anyone help?

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  • django, mod_wsgi, MySQL High CPU - Problems

    - by Red Rover
    I am having a problem with an OSQA site. It is Django/Apache/mod_wsgi configured site. Every hour, the CPU spikes to 164% (Average) for task HTTPD. After 10 minutes, it frees back up. I have reviewed the logs, cron tables, made many config changes, but cannot track this problem down. Can someone please look at the information below and let me know if it is a configuration problem, or if anyone else has experienced this issue. Running TOP shows HTTPD using 165% of CPU VMware performance monitor also displays spikes. This happens every hour for 10 minutes. I have the following information from server status Server Version: Apache/2.2.15 (Unix) DAV/2 mod_wsgi/3.2 Python/2.6.6 Server Built: Feb 7 2012 09:50:15 Current Time: Sunday, 10-Jun-2012 21:44:29 EDT Restart Time: Sunday, 10-Jun-2012 19:44:51 EDT Parent Server Generation: 0 Server uptime: 1 hour 59 minutes 37 seconds Total accesses: 1088 - Total Traffic: 11.5 MB CPU Usage: u80.26 s243.8 cu0 cs0 - 4.52% CPU load .152 requests/sec - 1682 B/second - 10.8 kB/request 4 requests currently being processed, 11 idle workers ....._..........__......W....................................... ...................................C._..._....._L__._L_._....... ...................... Scoreboard Key: "_" Waiting for Connection, "S" Starting up, "R" Reading Request, "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup, "C" Closing connection, "L" Logging, "G" Gracefully finishing, "I" Idle cleanup of worker, "." Open slot with no current process Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request 0-0 - 0/0/34 . 0.42 327 17 0.0 0.00 0.67 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 1-0 - 0/0/22 . 0.31 339 32 0.0 0.00 0.26 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 2-0 - 0/0/22 . 0.65 358 10 0.0 0.00 0.31 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 3-0 - 0/0/31 . 1.03 378 31 0.0 0.00 0.60 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 4-0 - 0/0/20 . 0.45 356 9 0.0 0.00 0.31 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 5-0 18852 0/16/34 _ 0.98 27 18120 0.0 0.37 0.62 69.180.250.36 osqa.informs.org GET /questions/289/what-is-the-difference-between-operations-re 6-0 - 0/0/32 . 0.94 309 29 0.0 0.00 0.64 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 7-0 - 0/0/31 . 1.15 382 32 0.0 0.00 0.75 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 8-0 - 0/0/21 . 0.28 403 19 0.0 0.00 0.20 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 9-0 - 0/0/32 . 1.37 288 16 0.0 0.00 0.60 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 10-0 - 0/0/33 . 1.72 383 16 0.0 0.00 0.40 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 I am running Django 1.3 This is a mod_wsgi configuration and copied is the wsgi.conf file: <IfModule !python_module> <IfModule !wsgi_module> LoadModule wsgi_module modules/mod_wsgi.so <IfModule wsgi_module> <Directory /var/www/osqa> Order allow,deny Allow from all #Deny from all </Directory> WSGISocketPrefix /var/run/wsgi WSGIPythonEggs /var/tmp WSGIDaemonProcess OSQA maximum-requests=10000 WSGIProcessGroup OSQA Alias /admin_media/ /usr/lib/python2.6/site-packages/Django-1.2.5-py2.6.egg/django/contrib/admin/media/ Alias /m/ /var/www/osqa/forum/skins/ Alias /upfiles/ /var/www/osqa/forum/upfiles/ <Directory /var/www/osqa/forum/skins> Order allow,deny Allow from all </Directory> WSGIScriptAlias / /var/www/osqa/osqa.wsgi </IfModule> </IfModule> </IfModule> This is the httpd.conf file Timeout 120 KeepAlive Off MaxKeepAliveRequests 100 MaxKeepAliveRequests 400 KeepAliveTimeout 3 <IfModule prefork.c> Startservers 15 MinSpareServers 10 MaxSpareServers 20 ServerLimit 50 MaxClients 50 MaxRequestsPerChild 0 </IfModule> <IfModule worker.c> StartServers 4 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> We are using MySQL The server is an ESX4i, configured for the VM to use 4 CPUs and 8 GB Ram. Hyper threading is enabled, 2 physical CPU's, with 4 Logical. the CPU are Intel Xeon 2.8 GHz. Total memory is 12GB

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  • Could not import Django settings into Google App Engine

    - by gkelsall
    Hello all you Google App Engine experts, I have used Django a little before but am new to Google App Engine and am trying to use it's development web server with Django for the first time. I don't know if this is relevent but I previously had Django 1.1 and Python 2.6 on my Windows XP and even though I have uninstalled Python 2.6 there is still a folder and entries in the registry. I have followed the instructions from Google but when I browse to the GAE developemnt web server it cannot find my settings (details below). Any hints gratefully received. Regards Geoff C:\Documents and Settings\GeoffK\My Documents\ing\ingsite>echo %PATH% C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS \system32\WindowsPowerShell\v1.0;;C:\Python25;C:\Python25\Lib\site- packages\django\bin;C:\Documents and Settings\GeoffK\My Documents\ing \ingsite;C:\Program Files\Google\google_appengine\ C:\Documents and Settings\GeoffK\My Documents\ing\ingsite>echo %PYTHONPATH% C:\Documents and Settings\GeoffK\My Documents\ing\ingsite C:\Documents and Settings\GeoffK\My Documents\ing\ingsite>C:\Documents and Settings\GeoffK\My Documents\ing\ingsite>dev_appserver.py -- debug_imports ingiliz\ INFO 2009-08-04 07:29:45,328 appengine_rpc.py:157] Server: appengine.google. com INFO 2009-08-04 07:29:45,358 appcfg.py:322] Checking for updates to the SDK. INFO 2009-08-04 07:29:45,578 appcfg.py:336] The SDK is up to date. WARNING 2009-08-04 07:29:45,578 datastore_file_stub.py:404] Could not read data store data from c:\docume~1\geoffk\locals~1\temp \dev_appserver.datastore WARNING 2009-08-04 07:29:45,578 datastore_file_stub.py:404] Could not read data store data from c:\docume~1\geoffk\locals~1\temp \dev_appserver.datastore.history WARNING 2009-08-04 07:29:45,608 dev_appserver.py:3296] Could not initialize ima ges API; you are likely missing the Python "PIL" module. ImportError: No module named _imaging INFO 2009-08-04 07:29:45,625 dev_appserver_main.py:465] Running application ingiliz on port 8080: http://localhost:8080 ..... Now attempting to browse if need more detail here I can post ..... if not settings.DATABASE_ENGINE: File "C:\Python25\lib\site-packages\django\conf\__init__.py", line 28, in __ge tattr__ self._import_settings() File "C:\Python25\lib\site-packages\django\conf\__init__.py", line 59, in _imp ort_settings self._target = Settings(settings_module) File "C:\Python25\lib\site-packages\django\conf\__init__.py", line 94, in __in it__ raise ImportError, "Could not import settings '%s' (Is it on sys.path? Does it have syntax errors?): %s" % (self.SETTINGS_MODULE, e) ImportError: Could not import settings 'settings' (Is it on sys.path? Does it ha ve syntax errors?): No module named settings INFO 2009-08-04 07:31:02,187 dev_appserver.py:2982] "GET / HTTP/ 1.1" 500 -

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  • Specialization of template after instantiation?

    - by Onur Cobanoglu
    Hi, My full code is too long, but here is a snippet that will reflect the essence of my problem: class BPCFGParser { public: ... ... class Edge { ... ... }; class ActiveEquivClass { ... ... }; class PassiveEquivClass { ... ... }; struct EqActiveEquivClass { ... ... }; struct EqPassiveEquivClass { ... ... }; unordered_map<ActiveEquivClass, Edge *, hash<ActiveEquivClass>, EqActiveEquivClass> discovered_active_edges; unordered_map<PassiveEquivClass, Edge *, hash<PassiveEquivClass>, EqPassiveEquivClass> discovered_passive_edges; }; namespace std { template <> class hash<BPCFGParser::ActiveEquivClass> { public: size_t operator()(const BPCFGParser::ActiveEquivClass & aec) const { } }; template <> class hash<BPCFGParser::PassiveEquivClass> { public: size_t operator()(const BPCFGParser::PassiveEquivClass & pec) const { } }; } When I compile this code, I get the following errors: In file included from BPCFGParser.cpp:3, from experiments.cpp:2: BPCFGParser.h:408: error: specialization of ‘std::hash<BPCFGParser::ActiveEquivClass>’ after instantiation BPCFGParser.h:408: error: redefinition of ‘class std::hash<BPCFGParser::ActiveEquivClass>’ /usr/include/c++/4.3/tr1_impl/functional_hash.h:44: error: previous definition of ‘class std::hash<BPCFGParser::ActiveEquivClass>’ BPCFGParser.h:445: error: specialization of ‘std::hash<BPCFGParser::PassiveEquivClass>’ after instantiation BPCFGParser.h:445: error: redefinition of ‘class std::hash<BPCFGParser::PassiveEquivClass>’ /usr/include/c++/4.3/tr1_impl/functional_hash.h:44: error: previous definition of ‘class std::hash<BPCFGParser::PassiveEquivClass>’ Now I have to specialize std::hash for these classes (because standard std::hash definition does not include user defined types). When I move these template specializations before the definition of class BPCFGParser, I get a variety of errors for a variety of different things tried, and somewhere (http://www.parashift.com/c++-faq-lite/misc-technical-issues.html) I read that: Whenever you use a class as a template parameter, the declaration of that class must be complete and not simply forward declared. So I'm stuck. I cannot specialize the templates after BPCFGParser definition, I cannot specialize them before BPCFGParser definition, how may I get this working? Thanks in advance, Onur

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  • Derived template override return type of member function C++

    - by Ruud v A
    I am writing matrix classes. Take a look at this definition: template <typename T, unsigned int dimension_x, unsigned int dimension_y> class generic_matrix { ... generic_matrix<T, dimension_x - 1, dimension_y - 1> minor(unsigned int x, unsigned int y) const { ... } ... } template <typename T, unsigned int dimension> class generic_square_matrix : public generic_matrix<T, dimension, dimension> { ... generic_square_matrix(const generic_matrix<T, dimension, dimension>& other) { ... } ... void foo(); } The generic_square_matrix class provides additional functions like matrix multiplication. Doing this is no problem: generic_square_matrix<T, 4> m = generic_matrix<T, 4, 4>(); It is possible to assign any square matrix to M, even though the type is not generic_square_matrix, due to the constructor. This is possible because the data does not change across children, only the supported functions. This is also possible: generic_square_matrix<T, 4> m = generic_square_matrix<T, 5>().minor(1,1); Same conversion applies here. But now comes the problem: generic_square_matrix<T, 4>().minor(1,1).foo(); //problem, foo is not in generic_matrix<T, 3, 3> To solve this I would like generic_square_matrix::minor to return a generic_square_matrix instead of a generic_matrix. The only possible way to do this, I think is to use template specialisation. But since a specialisation is basically treated like a separate class, I have to redefine all functions. I cannot call the function of the non-specialised class as you would do with a derived class, so I have to copy the entire function. This is not a very nice generic-programming solution, and a lot of work. C++ almost has a solution for my problem: a virtual function of a derived class, can return a pointer or reference to a different class than the base class returns, if this class is derived from the class that the base class returns. generic_square_matrix is derived from generic_matrix, but the function does not return a pointer nor reference, so this doesn't apply here. Is there a solution to this problem (possibly involving an entirely other structure; my only requirements are that the dimensions are a template parameter and that square matrices can have additional functionality). Thanks in advance, Ruud

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  • Is there a template engine for Node.js?

    - by Seb
    I'm kind of falling in love with Node.js not because you write app code in javascript but because of its performance. I really don't care a lot about how beautiful a server side language might be but how much requests per second it can handle. So anyway I'm looking forward to experiment building an entire webapp using Node.js (and going back to the actual question) is there a template engine similar to let's say the django template engine or something similar (that at least allows you to extend base templates) available for Node.js?

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  • c++ template and its element type

    - by David
    This is my template matrix class: template<typename T> class Matrix { public: .... Matrix<T> operator / (const T &num); } However, in my Pixel class, I didn't define the Pixel/Pixel operator at all! Why in this case, the compiler still compiles?

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  • Conversion between different template instantiation of the same template

    - by Naveen
    I am trying to write an operator which converts between the differnt types of the same implementation. This is the sample code: template <class T = int> class A { public: A() : m_a(0){} template <class U> operator A<U>() { A<U> u; u.m_a = m_a; return u; } private: int m_a; }; int main(void) { A<int> a; A<double> b = a; return 0; } However, it gives the following error for line u.m_a = m_a;. Error 2 error C2248: 'A::m_a' : cannot access private member declared in class 'A' d:\VC++\Vs8Console\Vs8Console\Vs8Console.cpp 30 Vs8Console I understand the error is because A<U> is a totally different type from A<T>. Is there any simple way of solving this (may be using a friend?) other than providing setter and getter methods? I am using Visual studio 2008 if it matters.

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  • Apache/Django subdomains problem

    - by thomasgg
    Now I have apache configuration which works only with localhost domain (http://localhost/). Alias /media/ "/sciezka/do/instalacji/django/contrib/admin/media/" Alias /site_media/ "/sciezka/do/plikow/site_media/" <Location "/"> SetHandler python-program PythonHandler django.core.handlers.modpython SetEnv DJANGO_SETTINGS_MODULE settings PythonPath "['/thomas/django_projects/project'] + sys.path" PythonDebug On </Location> <Location "/site_media"> SetHandler none </Location> How can I make it working for some subdomains like pl.localhost or uk.localhost? This subdomains should display the same page what domain (localhost). Second question: It is possible change default localhost address (http://localhost/) to (http://localhost.com/) or (http://www.localhost.com/) or something else?

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