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  • Visual Studio Custom Project Template

    - by rauts
    Hi All, I have created a Custom C# Project Template for Visual Studio 2008. It works perfect. Only issue is that i have to place the zip file for the project template under the "C:\Documents and Settings\\My Documents\Visual Studio 2008\Templates\ItemTemplates\Visual C#" Now as this folder is specific to each user on the machine, I will have to make sure that all the users on the machine has the project template installed seperately. Is there any way I can just install it once and all the users can get this project template. In short can I change the Custom Project template Install directory?

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  • Use a template parameter in a preprocessor directive?

    - by Ranju V
    Is it possible to use a non-type constant template parameter in a preprocessor directive? Here's what I have in mind: template <int DING> struct Foo { enum { DOO = DING }; }; template <typename T> struct Blah { void DoIt() { #if (T::Doo & 0x010) // somecode here #endif } }; When I try this with something like Blah<Foo<0xFFFF>>, VC++ 2010 complains something about unmatched parentheses in the line where we are trying to use "#if". I am guessing the preprocessor doesn't really know anything about templates and this sort of thing just isn't in its domain. What say? Thanks!

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  • C2664 when casting child class to templated parent class

    - by DC
    I have a parent class which is templated, and a child class which implements it. template< typename T1, typename T2> class ParentClass{ . . . }; class ChildClass : public ParentClass<MyT1, MyT2> { . . . }; And I want to have a pointer which I can use polymorphically: ParentClass<T1, T2>* ptr; ptr = static_cast<ParentClass<MyT1, MyT2>* >(new ChildClass() ); No matter how I cast it, I always get a C2664 which has the same expression: error C2664: cannot convert parameter 1 from 'ParentClass< T1,T2 *' to 'ParentClass< T1,T2 *' Is it not possible to cast pointer types between inherited types if the parent is templated, even if the types specified in the templates are the same?

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  • implement string class with custom behavior

    - by truman
    In one of our class sir said that template allows one to customize behavior of class, and then he gave example of string class, that with few lines of code we can customize string class from STL, as in, we can make it to treat 'a' and 'z' same, 'b' and 'y' same, 'c' and 'x' same and so on. Similary 'A' and 'Z' same etc. "abc" == "zyx" is true; "Abc" == "zyx" is false; "Abc == "Zyx" is true; etc I was thinking of implementing such string class, but I am not able to do so. How can we implement such string class using templates?

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  • boost::enable_if class template method

    - by aaa
    I got class with template methods that looks at this: struct undefined {}; template<typename T> struct is_undefined : mpl::false_ {}; template<> struct is_undefined<undefined> : mpl::true_ {}; template<class C> struct foo { template<class F, class V> typename boost::disable_if<is_undefined<C> >::type apply(const F &f, const V &variables) { } template<class F, class V> typename boost::enable_if<is_undefined<C> >::type apply(const F &f, const V &variables) { } }; apparently, both templates are instantiated, resulting in compile time error. is instantiation of template methods different from instantiation of free functions? I have fixed this differently, but I would like to know what is up. Thank you

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  • Can someone rid me of these turbulent T4 template editors?

    - by Will
    I'm using Tangible's editor and (no offense guys) it sucks. Its one painful step above notepad. But its (afaik) the only game in town. Does anybody have any tips/tricks on creating T4 templates in a non-painful way? For instance, I'm thinking about creating a T4 Template that essentially turns a class defined in a solution into a template generator. DTE, look for code that is marked with this or that attribute, run this or that method, and drop the results into a file. At least I'd get legit intellisense out of the deal...

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  • listing objects from ManyToManyField

    - by Noam Smadja
    i am trying to print a list of all the Conferences and for each conference, print its 3 Speakers. in my template i have: {% if conferences %} <ul> {% for conference in conferences %} <li>{{ conference.date }}</li> {% for speakers in conference.speakers %} <li>{{ conference.speakers }}</li> {% endfor %} {% endfor %} </ul> {% else %} <p>No Conferences</p> {% endif %} in my views.py file i have: from django.shortcuts import render_to_response from youthconf.conference.models import Conference def manageconf(request): conferences = Conference.objects.all().order_by('-date')[:5] return render_to_response('conference/manageconf.html', {'conferences': conferences}) there is a model named conference. which has a class named Conferences with a ManyToManyField named speakers i get the error: Caught an exception while rendering: 'ManyRelatedManager' object is not iterable with this line: {% for speakers in conference.speakers %}

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  • Will Visual Studio 2010 support HTML 5?

    - by Chris
    Since Visual Studio 2010 is slated for release in March of 2010 and HTML 5 is now starting to be used even more widely, I would like to know if Visual Studio will ship with HTML 5 templates, standard controls and support for the more common markup? A definition for support of HTML 5 would be that any new version of Visual Studio should have similar support for code-completion, validation and markup that is currently supported for HTML 4.01 and XHTML 1.0 and 1.1. Update From the Visual Web Develolper Team Blog: HTML 5 intellisense and validation schema for Visual Studio 2008 and Visual Web Developer is for downloading. Follow the instructions posted on the page to install the new scheme. Seems like the Visual Studio Team will be supporting HTML 5 after all.

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  • Orverride Problem for Custom Design on Product - Magneto

    - by Chris
    I am running several sites in several different languages off of single instance of magneto. There are two main styles Site 1 Site 2 Each site has some cusomtimizations based on language So each shop view has an some templates defined Site 2 - DE Site 2 - UK Now the problem is that when I apply a product level design, it forget's about the language level definition and skips back to the main definition. I want it to work like this Site 2 Site 2 DE Product Style But Instead it seems to work like this Site 2 Site 2 DE Product Style Where Site 2 DE is not ignored because a custom product style has been defined. How can I get the first hierarchy to work? So that my product styles do not override the language styles completely.

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  • Bug in variadic function template specialization with MSVC?

    - by Andrei Tita
    Using the Visual Studio Nov 2012 CTP, which supports variadic templates (among other things). The following code: template<int, typename... Args> void myfunc(Args... args) { } template<> void myfunc<1, float>(float) { } produces the following errors: error C2785: 'void myfunc(Args...)' and 'void myfunc(float)' have different return types error C2912: explicit specialization 'void myfunc(float)' is not a specialization of a function template (yeah, the first one is pretty funny) So my questions are: 1) Am I writing legal C++11 here? 2) If yes, is there a way to find out if this is a known bug in MSVC before submitting it?

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  • How do I implement jQuery image cycle loops on rollover for multiple thumbnail sets on a page?

    - by Kendrick Ledet
    Here is the Javascript I currently have <script type="text/javascript"> $(function() { $('.slideshow').hover( function() { $('.slides').cycle('resume'); }, function() { $('.slides').cycle('pause'); } ); $('.slides').cycle({ fx: 'fade', speed: .3, timeout: 280, next: '#next', prev: '#prev' }).cycle("pause"); }); </script> It works; but the thing is it works for all thumbnail sets on the page, and whenever I mouseover on one set of images, every other set of images loops as well. I do see that this is because I'm targeting classes, but my jQuery experience is quite limited so I have no idea how to only target a single instance of each class without effecting the others, and I can't go in and hardcode id's because my thumbnails and amount of videos on each page are determined dynamically via this Django template. http://pastebin.com/nf42bSAx I would greatly appreciate any help, as this is essential for my project (open source media platform). Thank you.

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  • Determining whether a class implements a generic list in a T4 template

    - by James Hollingworth
    I'm writing a T4 template which loads some classes from an assembly, does some analysis of the classes and then generates some code. One particular bit of analysis I need to do is to determine whether the class implements a generic list. I can do this pretty simply in C#, e.g. public class Foo : List<string> { } var t = typeof(Foo); if (t.BaseType != null && t.BaseType.IsGenericType && t.BaseType.GetGenericTypeDefinition() == typeof(List<>))) Console.WriteLine("Win"); However T4 templates use the FXCop introspection engine and so you do not have access to the .net reflection API. I've spent the past couple of hours in Reflector but still can't figure it out. Does anyone have any clues about how to do this?

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  • Amazon EC2 Ami recommendations for free tier?

    - by Console
    Amazon web services recently introduced a free tier, where you basically get free stuff to try out AWS and run tiny sites and projects. Basically it's free as long as you remain below a certain limit of bandwidth, disk storage etc. Since going over the limits can quickly become quite expensive (for a hobbyist) I would like some recommendations or suggestions about which AMI's I can run on the free tier, for the purpose of trying out Ruby on Rails and/or Django.

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  • We are moving to two servers from one server due to performance issues. How do we monitor the value of this change?

    - by MikeN
    We are moving to two servers from one server due to performance issues. We are moving our MySQL DB to its own dedicated server and will keep the original machine as the front end machine running nginx/apache (Django backend.) How do we monitor the value of this change? It is possible our whole site could actually get slower since the MySQL queries will be going out over a secure remote connection instead of locally?

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  • links for 2011-03-15

    - by Bob Rhubart
    Dr. Frank Munz: Resize AWS EC2 Cloud Instances Dr Munz says: "You cannot dynamically resize a running cloud instance. E.g. there is no API call to ask for 2.2 GHz CPU speed instead of 1.8 GHz or to dynamically add another 3.5 GB of RAM." (tags: oracle cloud amazon ec2) Roddy Rodstein: Oracle VM Manager Architecture and Scalability Rodstein says: "Oracle VM Manager can be installed in an all-in-one configuration using the default Oracle 10g Express Database or in a more traditional two tier architecture with an OC4J web tier and a 10 or 11g database tier." (tags: oracle otn virtualization oraclevm) Mark Nelson: Getting started with Continuous Integration for SOA projects Nelson says: "I am exploring how to use Maven and Hudson to create a continuous integration capability for SOA and BPM projects. This will be the first post of several on this topic, and today we will look at setting up some simple continuous integration for a single SOA project." (tags: oracle maven hudson soa bpm) 5 New Java Champions (The Java Source) Tori Wieldt shares the big news. Congratulations to new Java Champs Jonas Bonér, James Strachan, Rickard Oberg, Régina ten Bruggencate, and Clara Ko. (tags: oracle java) Alert for Forms customers running Oracle Forms 10g (Grant Ronald's Blog) Ronald says: "While you might have been happily running your Forms 10g applications for about 5 years or so now, the end of premier support is creeping up and you need to start planning for a move to Oracle Forms 11g." (tags: oracle oracleforms) Brenda Michelson: Enterprise Architecture Rant #4,892 "I’m increasingly concerned about the macro-direction of our field, as we continue to suffer ivory tower enterprise architecture punditry, rigid frameworks and endless philosophical waxing." - Brenda Michelson (tags: entarch enterprisearchitecture ivorytower) Amitabh Apte: Enterprise Architecture - Different Perspectives "Business does not need Enterprise Architecture," says Apte, "it needs value and outcomes from the EA function." (tags: entarch enterprisearchitecture) First Ever MySQL on Windows Online Forum - March 16, 2011 (Oracle's MySQL Blog) Monica Kumar shares the details. (tags: oracle mysql mswindows) Jeff Davies: Running Multiple WebLogic and OSB Domains "There is a small 'gotcha' if you want to create multiple domains on a devevelopment machine," says Jeff Davies. But don't worry - there's a solution. (tags: oracle soa osb weblogic servicebus) The Arup Nanda Blog: Good Engineering "Engineering is not about being superficially creative," Nanda says, "it's about reliability and trustworthiness." (tags: oracle engineering software technology) Welcome to the SOA & E2.0 Partner Community Forum (SOA Partner Community Blog) (tags: ping.fm)

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  • links for 2011-02-09

    - by Bob Rhubart
    Tech Cast Live - Java and Oracle, One Year Later - February 15th 10AM PST (Oracle Technology Network Blog (aka TechBlog)) (tags: ping.fm) The impact of IT decisions on organizational culture - O'Reilly Radar "While I believe we recognize the limiting qualities of IT decisions, I'd suggest we've insufficiently studied the degree to which those decisions in aggregate can have a large influence on organizational culture." - Jonathan Reichental, Ph.D. (tags: ITgovernance organizationalculture enterprisearchitecture) Women "computers" of World War II - Boing Boing "Before it came to mean laptops, PCs, or even room-sized machines, "computer" was what you called a person who did mathematical calculations for a living. That job was vitally important during World War II. And, like many vital jobs on the homefront, it was turned over to women..." (tags: computers history worldwar2) InfoQ: Book Excerpt and Interview: 100 SOA Questions Asked and Answered A new "100 SOA Questions Asked and Answered " book by Kerrie Holley and Ali Arsanjani provides a deep insight into SOA covering a wide spectrum of topics from SOA basics to its business and organizational impact, to SOA methods and architecture to SOA future. InfoQ spoke with Kerrie Holley and Ali Arsanjani about their book. (tags: ping.fm) @myfear: GlassFish City - Another view onto your favorite application server Oracle ACE Director Markus Eisele runs GlassFish through CodeCity. (tags: oracle otn oracleace glassfish codecity) The Ron Batra Blog: Technology Whispers: Upcoming Presentations Oracle ACE Director Ron Batra shares details on upcoming presentations at OAUG events in the US and Dubai. (tags: oaug c11 oracle otn oracleace) Free ADF Training Event in the UK (Grant Ronald's Blog) Gobsmack survivor Grant Ronald with the details on an Oracle ADF training session he'll conduct on 11 May 2011 at the UK Oracle office in Reading. (tags: oracle otn adf) Java Spotlight Episode 16 - Richar Bair - The Java Spotlight Podcast The latest Java Spotlight podcast features an interview with Java Client Architect Richar Bair. (tags: oracle java podcast) Stewart Bryson: OBIEE 11g Migrations "[Rittman Mead's] Mark and Venkat have covered OBIEE migration methodologies in the past (see here, here and here), but I decided to throw my hat in the ring on the subject, as I had to develop a methodology for a client recently and wanted to share my experiences." - Stewart Bryson (tags: oracle otn obiee businessintelligence) Dr. Chris Harding: The golden thread of interoperability | Open Group Blog "There are so many things going on at every Conference by The Open Group that it is impossible to keep track of all of them, and this week’s Conference in San Diego, California, is no exception. The main themes are Cybersecurity, Enterprise Architecture, SOA and Cloud Computing." - Dr. Chris Harding (tags: entarch soa interoperability cloud) Marc Kelderman: OSB: Creating an Asynchronous / Fire-Forget WebService Call Creating a fire-and-forget call via OSB is simple, according to solution architect Marc Kelderman. "The trick is to send NO response back to the caller, only an HTTP response code, 200 or any other." (tags: oracle otn servicebus)

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  • links for 2010-12-22

    - by Bob Rhubart
    @hajonormann: BPM: Top Seven Architectural Topics in 2010 Oracle ACE Director Hajo Normann offers details on how to design a BPM/SOA solution including: modeling human interaction, improving BPM models, orchestrating composed services, central task management, new approaches for business-IT alignment, solutions for non-deterministic processes, and choreography. (tags: oracle otn soasymposium infoq soa bpm) InfoQ: Simplicity, The Way of the Unusual Architect Dan North talks about the tendency developers-becoming-architects have to create bigger and more complex systems. Without trying to be simplistic, North argues for simplicity, offering strategies to extract the simple essence from complex situations. (tags: ping.fm) Fun with Sun Ray, 3D, Oracle VM x86 and SRIOV (Wim Coekaerts Blog) "One of the things I like about my job is that I get to play around with stuff and make use of the technologies we work on in my teams. Sort of my own little playground." - Wim Coekaerts (tags: oracle otn virtualization oraclevm) Oracle VM VirtualBox 4.0.0 Released! (Oracle's Virtualization Blog) And you were worried about what to get that special someone for Christmas... (tags: oracle otn virtualization virtualbox) Virtual Developer Day: Oracle WebLogic Server & Java EE (#OTNVDD) (Oracle Technology Network Blog (aka TechBlog)) "Virtual Developer Day is back with a vengeance! On Feb. 1, login to learn how Oracle WebLogic Server enables a whole new level of productivity for enterprise developers." Registration is open. (tags: oracle otn events webinar java) New Coherence 3.6 Oracle University Course (Cristóbal Soto's Blog) Cristóbal Soto shares information on the "Oracle Coherence 3.6: Share and Manage Data in Clusters" course now available through Oracle University. (tags: oracle otn grid coherence) The Aquarium: Oracle WebLogic Server & Java EE developer day "Oracle WebLogic is well on its way to contribute to the general Java EE 6 momentum and the OTN Blog has just announced a Virtual Developer Day for Oracle WebLogic." (tags: oracle otn weblogic java) Enterprise 2.0 Use Cases for Semantic Web (Reiser 2.0) "How can an enterprise improve the efficiency and effectiveness of their Knowledge and Community model leveraging semantic technologies and social networking dynamics?" - Peter Reiser (tags: oracle otn enterprise2.0 semanticweb) John Gøtze: European Interoperability Framework 2.0 "This week, the European Commission announced an updated interoperability policy in the EU. The Commission has committed itself to adopt a Communication that introduces the European Interoperability Strategy (EIS) and an update to the European Interoperability Framework (EIF)..." - John Gøtze (tags: entarch Interoperability) Andy Mulholland: Maybe Web 3.0 is quite understandable – and a natural result "The idea of Web 1.0 = content, Web 2.0 = people and Web 3.0 = services has a nice symmetrical feel to it, in fact it feels basically right as such a definition would include the two other major definitions as well. So if we put these things all together what picture do we see?" - Andy Mulholland (tags: web2.0 web3.0) Ken Downs: A Working Definition of Business Logic, with Implications for CRUD Code "The Wikipedia entry on 'Business Logic' has a wonderfully honest opening sentence stating that 'Business logic, or domain logic, is a non-technical term...'"  (tags: businesslogic crud)

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  • Configuring varnish and django (apache/modwsgi)

    - by Hedde
    I am trying to work out why my application keeps hitting the database while I have setup varnish infront of apache. I think I am missing some vital configuration, any tips are welcome This is my curl result: HTTP/1.1 200 OK Server: Apache/2.2.16 (Debian) Content-Language: en-us Vary: Accept,Accept-Encoding,Accept-Language,Cookie Cache-Control: s-maxage=60, no-transform, max-age=60 Content-Type: application/json; charset=utf-8 Date: Sat, 15 Sep 2012 08:19:17 GMT Connection: keep-alive My varnishlog: 13 BackendClose - apache 13 BackendOpen b apache 127.0.0.1 47665 127.0.0.1 8000 13 TxRequest b GET 13 TxURL b /api/v1/events/?format=json 13 TxProtocol b HTTP/1.1 13 TxHeader b User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3 13 TxHeader b Host: foobar.com 13 TxHeader b Accept: */* 13 TxHeader b X-Forwarded-For: 92.64.200.145 13 TxHeader b X-Varnish: 979305817 13 TxHeader b Accept-Encoding: gzip 13 RxProtocol b HTTP/1.1 13 RxStatus b 200 13 RxResponse b OK 13 RxHeader b Date: Sat, 15 Sep 2012 08:21:28 GMT 13 RxHeader b Server: Apache/2.2.16 (Debian) 13 RxHeader b Content-Language: en-us 13 RxHeader b Content-Encoding: gzip 13 RxHeader b Vary: Accept,Accept-Encoding,Accept-Language,Cookie 13 RxHeader b Cache-Control: s-maxage=60, no-transform, max-age=60 13 RxHeader b Content-Length: 6399 13 RxHeader b Content-Type: application/json; charset=utf-8 13 Fetch_Body b 4(length) cls 0 mklen 1 13 Length b 6399 13 BackendReuse b apache 11 SessionOpen c 92.64.200.145 53236 :80 11 ReqStart c 92.64.200.145 53236 979305817 11 RxRequest c HEAD 11 RxURL c /api/v1/events/?format=json 11 RxProtocol c HTTP/1.1 11 RxHeader c User-Agent: curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8r zlib/1.2.3 11 RxHeader c Host: foobar.com 11 RxHeader c Accept: */* 11 VCL_call c recv lookup 11 VCL_call c hash 11 Hash c /api/v1/events/?format=json 11 Hash c foobar.com 11 VCL_return c hash 11 VCL_call c miss fetch 11 Backend c 13 apache apache 11 TTL c 979305817 RFC 60 -1 -1 1347697289 0 1347697288 0 60 11 VCL_call c fetch deliver 11 ObjProtocol c HTTP/1.1 11 ObjResponse c OK 11 ObjHeader c Date: Sat, 15 Sep 2012 08:21:28 GMT 11 ObjHeader c Server: Apache/2.2.16 (Debian) 11 ObjHeader c Content-Language: en-us 11 ObjHeader c Content-Encoding: gzip 11 ObjHeader c Vary: Accept,Accept-Encoding,Accept-Language,Cookie 11 ObjHeader c Cache-Control: s-maxage=60, no-transform, max-age=60 11 ObjHeader c Content-Type: application/json; charset=utf-8 11 Gzip c u F - 6399 69865 80 80 51128 11 VCL_call c deliver deliver 11 TxProtocol c HTTP/1.1 11 TxStatus c 200 11 TxResponse c OK 11 TxHeader c Server: Apache/2.2.16 (Debian) 11 TxHeader c Content-Language: en-us 11 TxHeader c Vary: Accept,Accept-Encoding,Accept-Language,Cookie 11 TxHeader c Cache-Control: s-maxage=60, no-transform, max-age=60 11 TxHeader c Content-Type: application/json; charset=utf-8 11 TxHeader c Date: Sat, 15 Sep 2012 08:21:29 GMT 11 TxHeader c Connection: keep-alive 11 Length c 0 11 ReqEnd c 979305817 1347697288.292612076 1347697289.456128597 0.000086784 1.163468122 0.000048399

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  • Tool or website or process to display previews of website templates residing in archive files?

    - by Tony_Henrich
    I have hundreds of website templates in rar or zip files. To view any of them I have to extract the archive to a temporary folder and then view the template in there. It's a time consuming manual process to do this for each template Is there a tool which enables me to quickly preview the templates in the files? OR (if I extract each template into a separate folder off a master folder) A web app which can enable previewing of each template by automatically creating a link or a preview image (similar to template sites) of the home page for? OR any method to preview the templates in the fastest convenient way possible?

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  • How to create a WHM/cPanel account, without creating a new sub-domain?

    - by Cyclops
    I have a basic VPS (full root access), with WHM/cPanel, and am learning the ropes. I'm trying to create a new account for an existing domain (mysite.com), and so far WHM won't let me - it either wants a sub-domain or fake domain, but won't allow two accounts for one domain. In the beginning, there was only the root account, and it wouldn't let me login to cPanel - a quick chat with tech support, and I am informed that I need to create a second account, which I did. So now I have an account, call it ns1me, for domain mysite.com. Now I want to create a django account. I go through the same process, but WHM won't allow me to use mysite.com as the domain for django. The docs recommend a sub-domain, so I fill the box in with django.mysite.com. I then realize that has actually created a sub-domain - going to django.mysite.com shows me its home directory, along with helpful information about what version of Apache, Python, and other mods its running (thanks, Apache). I really don't want a sub-domain, so that's out. Another chat with tech support, and they recommend a fake domain name, as it won't create anything. Sure enough, using a domain of djangomysite.com works, and WHM allows me to create a django account. But of course, I can't send email to [email protected] (where I could to [email protected]). What I want, is to be able to create a second account, associated with mysite.com (so I can run cPanel logged in as django, send email to [email protected], etc) - without creating a whole new sub-domain, or fake domain.

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  • GeoDjango: Exceptions for basic geographic queries

    - by omat
    I am having problems with geographic queries with GeoDjango running on SpatiaLite on my development environment. from django.contrib.gis.db import models class Test(models.Model): poly = models.PolygonField() point = models.PointField() geom = models.GeometryField() objects = models.GeoManager() Testing via shell: >>> from geotest.models import Test >>> from django.contrib.gis.geos import GEOSGeometry >>> >>> point = GEOSGeometry("POINT(0 0)") >>> point <Point object at 0x105743490> >>> poly = GEOSGeometry("POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))") >>> poly <Polygon object at 0x105743370> >>> With these definitions, lets try some basic geographic queries. First contains: >>> Test.objects.filter(point__within=poly) Assertion failed: (0), function appendGeometryTaggedText, file WKTWriter.cpp, line 228. Abort trap And the django shell dies. And with within: >>> Test.objects.filter(poly__contains=point) GEOS_ERROR: Geometry must be a Point or LineString Traceback (most recent call last): ... GEOSException: Error encountered checking Coordinate Sequence returned from GEOS C function "GEOSGeom_getCoordSeq_r". >>> Other combinations also cause a variety of exceptions. I must be missing something obvious as these are very basic. Any ideas?

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  • Python: Does one of these examples waste more memory?

    - by orokusaki
    In a Django view function which uses manual transaction committing, I have: context = RequestContext(request, data) transaction.commit() return render_to_response('basic.html', data, context) # Returns a Django ``HttpResponse`` object which is similar to a dictionary. I think it is a better idea to do this: context = RequestContext(request, data) response = render_to_response('basic.html', data, context) transaction.commit() return response If the page isn't rendered correctly in the second version, the transaction is rolled back. This seems like the logical way of doing it albeit there won't likely be many exceptions at that point in the function when the application is in production. But... I fear that this might cost more and this will be replete through a number of functions since the application is heavy with custom transaction handling, so now is the time to figure out. If the HttpResponse instance is in memory already (at the point of render_to_response()), then what does another reference cost? When the function ends, doesn't the reference (response variable) go away so that when Django is done converting the HttpResponse into a string for output Python can immediately garbage collect it? Is there any reason I would want to use the first version (other than "It's 1 less line of code.")?

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  • Using IAM for user authentication

    - by mdavis6890
    I've read lots and lots of posts that touch on what I think should be a very common use case - but without finding exactly what I want, or a simple reason why it can't be done. I have some files on S3. I want to be able to grant certain users access to certain files, via a front end that I build. So far, I've made it work this way: I built the front end in Django, using it's built-in Users and Groups I have a model for Buckets, in which I mirror my S3 buckets. I have a m2m relationship from groups to buckets representing the S3 permissions. The user logs in and authenticates against Django's users. I grab from Django the list of buckets that the user is allowed to see I use boto to grab a list of links to files from those buckets and display to user. This works, but isn't ideal, and also just doesn't feel right. I've got to keep a mirror of the buckets, and I also have to maintain my own list of user/passwords and permissions, when AWS already has all that built in. What I really want is to simply create the users in IAM and use group permissions in IAM to control access to the S3 buckets. No duplication of data or function. My app would request a UN/PW from the user and use that to connect to IAM/S3 to pull the list of buckets and files, then display links to the user. Simple. How can I, or why can't I? Am I looking at this the wrong way? What's the "right" way to address this (I assume) very common use case?

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  • velocity: join optional fields with a separator/prefix

    - by SlowStrider
    What would be the most concise/readable way in a velocity template to join multiple fields with a separator while leaving out empty or null Strings without adding excess separators? As an example we have a tooltip or appointments that goes like: Appointment ($number) [with $employee] [-] [$remarks] [-] [$roomToVisit] Where I used brackets to indicate optional data. When filled in it would normally show as Appointment (3) with John - ballroom - serve Java coffee When $remarks is empty but $roomToVisit is not, this becomes: Appointment (3) with John - ballroom When $remarks is "serve Java coffee" but $roomToVisit is empty we get: Appointment (3) with John - serve Java coffee When both are empty: Appointment (3) with John Bonus: also make the field prefix optional. When only $employee is empty we should get: Appointment (2) serve Java coffee - ballroom Ideally I would like the velocity template to look very similar to the first code box. If this is not possible, how would you achieve this with a minimum of distracting code tags? Similar ideas (first is much more verbose): Join with intelligent separators velocity: do something except in last loop iteration

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  • Best practice: Define form field name in backend or the template

    - by AbcAeffchen
    If you designing a webpage you should separate the backend from the frontend. But if you use forms you have to name them. But where should you set this name? e.g. PHP: $fieldName = 'email'; $template->setVar('field_name', $fieldName) ... if(!empty($_POST)) validate($_POST[$fieldName]); Template: <input type="text" name="{$field_name}"> Or just PHP: if(!empty($_POST)) validate($_POST['email']); Template: <input type="text" name="email"> Or should I write a function that can be called from the template an converts an array of field data (name, type, value, id, class, ...) into html code? Is there a best practice where to define fieldnames (types,etc.)? Notice: I used php and smarty like pseudocode (and tags), but its a general question.

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