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• How Does a Login system generally work with OOP?

  - by fakingfantastic

  Sorry if this is a badly formed question, but I'm trying to make my web applications (using PHP) more OO. *EDIT* I'm developing the Framework myself */EDIT* Everything is great so far, I've made a Front Controller system that taps into a MVC system. The FC figures out what page you want, loads the specific page Controller (*EDIT* which extends an abstract Controller Object */EDIT*), which gets anything it needs from Models, and then calls the appropriate View. Very basic. But now, I need to make an admin section (quasi-CMS). How does a login system fit into the grand scheme of things? Do you set controllers as needing a login? If so, how? What If you only want certain views of a controller requiring login? Thanks in advance.

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• Override Django inlineformset_factory has_changed() to always return True

  - by John

  Hi, I am using the django inlineformset_factory function. a = get_object_or_404(ModelA, pk=id) FormSet = inlineformset_factory(ModelA, ModelB) if request.method == 'POST': metaform = FormSet (instance=a, data=request.POST) if metaform.is_valid(): f = metaform.save(commit=False) for instance in f: instance.updated_by = request.user instance.save() else: metaform = FormSet(instance=a) return render_to_response('nodes/form.html', {'form':metaform}) What is happening is that if I change any of the data then everything works ok and all the data gets updated. However if I don't change any of the data then the data is not updated. i.e. only entries which are changed go through the for loop to be saved. I guess this makes sense as there is no point saving data if it has not changed. However I need to go through and save every object in the form regardless of whether it has any changes on not. So my question is how do I override this so that it goes through and saves every record whether it has any changes or not? Hope this makes sense Thanks

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• Asynchronous database update in Django?

  - by Mark

  I have a big form on my site. When the users fill it out and submit it, most of the data just gets dumped to the database, and then they get redirected to a new page. However, I'd also like to use the data to query another site, and then parse the results. That might take a bit longer. It's not essential that the user sees these results right away, so I was wondering if it's possible to asynchronously call a function that will handle this, and then return an HttpResponse from my view like usual without making them wait? If so... how? Any particular libraries I should look at?

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• PHP/codeigniter - use of exit()

  - by Patrick

  I have a few pages that require login, so all controllers that link to these pages start with $this->checkSession(); //...rest of the code CheckSession should verify the session is still live, otherwise display a message and stop the execution of the rest of the code in the controller: function checkSession() { if (!$this->session->userdata('is_logged_in')) { //the session has expired! $data['main'] = 'confirmation_message'; $data['title'] = "Session expired"; $this->load->vars($data); $this->load->view('template'); exit(); } } . I was expecting these instructions to happen in sequence, but I only get a blank page. How can I make sure exit() gets executed only after all views are loaded?

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• Is there a variable in Rails that equates to the template that is being rendered?

  - by Sean Ahrens

  I can do request.path_parameters['controller'] and request.path_parameters['action'], but is there anything like request.path_parameters['template'] so I can discern which template file (such as index.html.erb) is being rendered? I'm writing a method that automatically sets the body id to the template being rendered, for easy css manipulation: class ApplicationController < ActionController::Base ... after_filter :define_body_selector ... def define_body_selector # sets @body_id to the name of the template that will be rendered # ie. if users/index.html.erb was just rendered, @body_id gets set to "index" @body_id = ??? end ...

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• a completely decoupled OO system ?

  - by shrini1000

  To make an OO system as decoupled as possible, I'm thinking of the following approach: 1) we run an RMI/directory like service where objects can register and discover each other. They talk to this service through an interface 2) we run a messaging service to which objects can publish messages, and register subscription callbacks. Again, this happens through interfaces 3) when object A wants to invoke a method on object B, it discovers the target object's unique identity through #1 above, and publishes a message on the message service for object B 4) message services invokes B's callback to give it the message 5) B processes the request and sends the response for A on message service 6) A's callback is called and it gets the response. I feel this system is as decoupled as practically possible, but it has the following problems: 1) communication is typically asynchronous 2) hence it's non real time 3) the system as a whole is less efficient. Are there any other practical problems where this design obviously won't be applicable ? What are your thoughts on this design in general ?

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• C++ template parameter/class ambiguity

  - by aaa

  hello. while testing with different version of g++, the following problem came up template<class bra> struct Transform<bra, void> : kernel::Eri::Transform::bra { static const size_t ni = bra::A::size; bra::A is interpreted as kernel::Eri::Transform::bra::A, rather than template argument by g++ 4.1.2. on the other hand, g++ 4.3 gets it right. what should be correct behavior according to standard? Meanwhile, I refactor slightly to make problem go away.

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• Getting notification / listener when action is performed (chimpChat / monkeyrunner tool)

  - by Dr. AtZe

  I want to get a notification if someone has performed an action in an android app from outside of the app. I don't want to make any (android) code changes. To do the actions I use the Chimpchat.jar, the .jar that the monkeyrunner tool uses. To be clear: Can I get a notification or register listeners on components from outside of the app? e.g. Run my android app My java application links into the device with chimpChat via the adb The user touches a button My java application gets a notification what was performed = am I able to get that information? If not, am I able to get the information on which position the tab was? Hopefully it's clear what I want to do. Thanks, soeren

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• WPF Labels look fine in XP, but are cut off at the bottom in Vista and Windows 7.

  - by juharr

  The following xaml looks fine in XP, but the bottom of the text gets cut off in Vista and Windows 7. <Grid> <Border Height="86" Margin="10,54,10,0" VerticalAlignment="Top" BorderBrush="Black" BorderThickness="1"/> <Label Height="22" Width="100" Margin="15,43,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" Background="White">Text Over Border</Label> </Grid> I realize that I could just increase the Height of the label, but I'm guessing I'll have problems with systems that have different resolution settings, or large text settings. Is there a better way to lay this out?

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• How to debug Perl program sudden exits?

  - by taw

  I have Perl program based on io::async, and it sometimes just exits after a few hours/days without printing any error message whatsoever. There's nothing in dmesg or /var/log either. STDOUT/STDERR are both autoflush(1) so data shouldn't be lost in buffers. It doesn't actually exit from IO::Async::Loop->loop_forever - print I put there just to make sure of that never gets triggered. Now one way would be to keep peppering the program with more and more prints and hope one of them gives me some clue. Is there better way to get information what was going on in a program that made it exit/silently crash?

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• jQuery add/remove row

  - by bocca

  I am trying to setup jQuery rows, with add/remove row functionality. I got started with online tutorial, http://jsbin.com/aciba that works fine. It only has input forms though. We need select to choose from. Now, I made some changes to accept selects as as well as inputs: http://jsbin.com/emata This does not work. Try selecting option 3 in cell 1, and press add "Add". The row added gets default "Cell 1" selected option to 1. What could be the reason?

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• Any way to chunk gzip with Apache and PHP

  - by donatJ

  I have a web application on a site that takes a while (~10 seconds) to complete a portion of the page near the bottom - it has been as optimized as it can be, and caching is not an option. We have compression enabled on the server via an .htaccess directive SetOutputFilter DEFLATE the problem is this causes the whole page to be held until completion before it starts outputting to the user, this is not optimal as the user sees nothing until the page completes. I have also tried it via the php ob_start("ob_gzhandler"); method. Currently I have a <FilesMatch > in my .htaccess restricting this specific script from being compressed. Basically my question is this - Is there a way to say chunk gzip or deflate so that the user gets it in pieces, so they can see that the page has begun loading?

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• How to extend abstract Entity class in RIA Services

  - by Calanus

  I want to add a bool variable and property to the base Entity class in my RIA services project so that it is available throughout all the entity objects but seem unable to work out how to do this. I know that adding properties to actual entities themselves is easy using .shared.cs and partial classes but adding such properties to the Entity class using similar methods doesn't work. For example, the following code doesn't work namespace System.ServiceModel.DomainServices.Client { public abstract partial class Entity { private bool auditRequired; public bool AuditRequired { get { return auditRequired; } set { auditRequired = value; } } } } All that happens is that the existing Entity class gets totally overriden rather than extending the Entity class. How do I extend the base Entity class so that functionality is available thoughout all derived entity classes?

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• Rails: How do I run a before_save only if certain conditions are met?

  - by Shpigford

  I have a before_save method that I call that renames an uploaded image. before_save :randomize_file_name def randomize_file_name extension = File.extname(screen_file_name).downcase key = ActiveSupport::SecureRandom.hex(8) self.screen.instance_write(:file_name, "#{key}#{extension}") end That method is part of my Item model. That works great when I create a new item or need to update the image associated with an item...but the problem is that if I need to update an item but NOT the image, the randomize_file_name method still gets run and renames the file in the database (though not the file itself, obviously). So, I'm thinking I need to figure out a way to only run randomize_file_name if a file is included in the form submission...but I'm not sure how to pull that off.

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• How to shutdown local tomcat server when closing browser window?

  - by agez

  Hi, I hava a web app running on a local tomcat server. When the user starts the app (via desktop shortcut) the server starts and the app is opened in a browser window. But when the user just clicks on the close button to stop the application the server is still running in the background - that's annoying. I tried to utilize the "unonload" and "onbeforeunload" events from javascript but unfortunately these events are also fired on some other requests in the app. So I can't use them, except I do a lot of refactoring. Does anyone have an idea for a possible solution? Btw, what I find interesting is the behaviour of Visual Studio when debugging a web application. When I close the browser window Visual Studio also gets a trigger to stop debug mode. So it seems it somehow notices the close event of the browser window, which would be exactly what I need. But I don't know how they do it... Cheers, Helmut

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• Application demands elevated privs to run on win7 but not vista

  - by Nifle

  I have a simple app that I just tried the installer (Innosetup) on win7(32-bit). After I install it the program icon on the desktop gets that shield on it that notifies the user that the app demands elevated privileges. I thought it was something wrong with the installer and made on using NSIS instead, same problem. Does anyone know why it does that on this computer but not on xp-32, win7-64 bit or Vista 64-bit? If I allow the app to run (Answers yes to the system prompt) it crashes with only the error " has encountered an error. Windows is looking for a solution" and then closes.

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• How to log POSTed forms submissions?

  - by justSteve

  Back in the ASP classic days when i needed to write out the name/value pairs of forms submitted by POST i thru this loop into the page: on error resume next for each x in Request.Form Response.AppendToLog x & "=" & Request(x) next It threw all the form fields and values into the log just as GETs are. Does IIS7 .net give me any better method? (this is for the dev/testing portion of the project i don't have any concern about the space or cycles used to accomplish this). thx

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• Best way to test instance methods without running __init__

  - by KenFar

  I've got a simple class that gets most of its arguments via init, which also runs a variety of private methods that do most of the work. Output is available either through access to object variables or public methods. Here's the problem - I'd like my unittest framework to directly call the private methods called by init with different data - without going through init. What's the best way to do this? So far, I've been refactoring these classes so that init does less and data is passed in separately. This makes testing easy, but I think the usability of the class suffers a little. EDIT: Example solution based on Ignacio's answer: import types class C(object): def __init__(self, number): new_number = self._foo(number) self._bar(new_number) def _foo(self, number): return number * 2 def _bar(self, number): print number * 10 #--- normal execution - should print 160: ------- MyC = C(8) #--- testing execution - should print 80 -------- MyC = object.__new__(C) MyC._bar(8)

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• Jquery Dynamic fancy box

  - by MrThomas

  Loading fancybox from Jquery how can I retrieve the contents of a div ID on a page and not the whole page. This is my code so fare which gets me the whole page: $(function() { $(".style_image a").live('click', function(event) { $(".style_image a").fancybox(); return false; }); }); I have also tried the following with no success: $(function() { $(".style_image a").live('click', function(event) { $(".style_image a" + "#show_style").fancybox(); return false; }); }); I'm not sure how this is done as there is little info on the fancy box docs. I wish this to be done dynamically not inline.

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• Why is the 'this' keyword not a reference type in C++ [closed]

  - by Dave Tapley

  Possible Duplicates: Why ‘this’ is a pointer and not a reference? SAFE Pointer to a pointer (well reference to a reference) in C# The this keyword in C++ gets a pointer to the object I currently am. My question is why is the type of this a pointer type and not a reference type. Are there any conditions under which the this keyword would be NULL? My immediate thought would be in a static function, but Visual C++ at least is smart enough to spot this and report static member functions do not have 'this' pointers. Is this in the standard?

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• Changing the width of dropdown area in flex combobox.

  - by DineshDu

  I have a combobox which gets populated by a remote method. I need to set the dropdownwidth of the combobox to the maximum length of the item in the combobox. I am able to achieve it by the following code. But if the resolution of the screen changes, the result is not similar. Is there any way to find the display width of the text in the dropdown? private function getGroupData(resultEvent:ResultEvent):void{ viewCbx.dataProvider = resultEvent.result as ArrayCollection; var comboDp:ArrayCollection = viewCbx.dataProvider as ArrayCollection; var dropWidth:int = 0; for each(var obj:Object in comboDp){ if(obj.groupName.length > dropWidth){ dropWidth = obj.groupName.length; } } viewCbx.dropdownWidth = dropWidth*6; }

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• Servlet's doGet not called from JSP form

  - by RadnaOdela

  I have this code on my JSP page <form action="LoginServlet" method="get"> <input type="text" name="username" /> <input type="text" name="password" /> <input type="submit" value="Submit" /> </form> and when I press Submit I get: The page cannot be displayed The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings. and LoginServlet.doGet method doesn't get called. But then when I press Enter again (in address bar) my doGet method gets called. What is wrong? I am using JEE eclipse and Tomcat

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• Sql server management studio reporting "The semaphore timeout period has expired."

  - by nis-simonsen

  On our development sql server, executing any query containing more than approximately 700 characters stalls for about 10 seconds and then reports the following error: Msg 121, Level 20, State 0, Line 0 A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.) for example, this query select * from FooTable where id = ' (.. and then 700 spaces ..) ' fails fails with the timeout error while this one select * from FooTable where id = ' (.. and then 600 spaces ..) ' fails with the expected Msg 8169, Level 16, State 2, Line 1 Conversion failed when converting from a character string to uniqueidentifier. - immediately. Indeed, throwing any query, including random garbage at our dev sql server exhibits this behaviour, while any other sql server I have available acts as expected, so I would think that the query never actually gets to parsing on the server. I'm at a loss here - any hints?

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• Where should i save my images that user uploads? java web application

  - by Nitesh Panchal

  Hello, I am saving the image at this location :- private static String photoGalleryPath = "/Common/PhotoGallery/"; In PhotoGallery. I create userid wise folders and save images. Everything works fine. But when i clean and build my project. The whole folder of PhotoGallery gets deleted. This looks very funny to me :). Why does it delete my whole folder everytime? And what more should i do to tell the extra smart Glassfish to not to delete my folders?

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• Dll only loads correctly via LoadLibrary?

  - by Steve

  I'm trying to use dbghelp.dll. If I set it up in the VS2008 properties to point to the correct library and header file, and put dbghelp.dll in the same directory as the executable, one of the functions in the dll fails. If I LoadLibrary the dll, everything that function works. I've looked at the header that gets included via the VS option, and the right one is being pulled in. The correct lib is being pulled in (checked via /verbose option), and depends.exe shows the correct dll is loaded. Does anyone know why I can't get this to work? I'll probably just go with LoadLibrary, but I'm genuinely stumped on this one. EDIT: SymfromAddr fails with an "error 87", whatever that is. If I load the dll via LoadLibrary, it works.

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