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  • Django: Only one of two fields can be filled in

    - by Giovanni Di Milia
    I have this model: class Journals(models.Model): jid = models.AutoField(primary_key=True) code = models.CharField("Code", max_length=50) name = models.CharField("Name", max_length=2000) publisher = models.CharField("Publisher", max_length=2000) price_euro = models.CharField("Euro", max_length=2000) price_dollars = models.CharField("Dollars", max_length=2000) Is there a way to let people fill out either price_euro or price_dollars? I do know that the best way to solve the problem is to have only one field and another table that specify the currency, but I have constraints and I cannot modify the DB. Thanks!

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  • Count number of queries executed by NHibernate in a unit test

    - by Bittercoder
    In some unit/integration tests of the code we wish to check that correct usage of the second level cache is being employed by our code. Based on the code presented by Ayende here: http://ayende.com/Blog/archive/2006/09/07/MeasuringNHibernatesQueriesPerPage.aspx I wrote a simple class for doing just that: public class QueryCounter : IDisposable { CountToContextItemsAppender _appender; public int QueryCount { get { return _appender.Count; } } public void Dispose() { var logger = (Logger) LogManager.GetLogger("NHibernate.SQL").Logger; logger.RemoveAppender(_appender); } public static QueryCounter Start() { var logger = (Logger) LogManager.GetLogger("NHibernate.SQL").Logger; lock (logger) { foreach (IAppender existingAppender in logger.Appenders) { if (existingAppender is CountToContextItemsAppender) { var countAppender = (CountToContextItemsAppender) existingAppender; countAppender.Reset(); return new QueryCounter {_appender = (CountToContextItemsAppender) existingAppender}; } } var newAppender = new CountToContextItemsAppender(); logger.AddAppender(newAppender); logger.Level = Level.Debug; logger.Additivity = false; return new QueryCounter {_appender = newAppender}; } } public class CountToContextItemsAppender : IAppender { int _count; public int Count { get { return _count; } } public void Close() { } public void DoAppend(LoggingEvent loggingEvent) { if (string.Empty.Equals(loggingEvent.MessageObject)) return; _count++; } public string Name { get; set; } public void Reset() { _count = 0; } } } With intended usage: using (var counter = QueryCounter.Start()) { // ... do something Assert.Equal(1, counter.QueryCount); // check the query count matches our expectations } But it always returns 0 for Query count. No sql statements are being logged. However if I make use of Nhibernate Profiler and invoke this in my test case: NHibernateProfiler.Intialize() Where NHProf uses a similar approach to capture logging output from NHibernate for analysis via log4net etc. then my QueryCounter starts working. It looks like I'm missing something in my code to get log4net configured correctly for logging nhibernate sql ... does anyone have any pointers on what else I need to do to get sql logging output from Nhibernate?

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  • $_SERVER['HTTP_X_REQUESTED_WITH'] seemingly not available on PHP 5.1.6

    - by kenny99
    Hi, I've run into a problem on a server running php 5.1.6 - the code i use to detect ajax requests isn't working as the $_SERVER['HTTP_X_REQUESTED_WITH'] variable is missing from the $_SERVER array. The same code works fine on php 5.2 and in firebug i can see the headers include X-Requested-With XMLHttpRequest. Anyone know any more about this issue and how I can get round it? Thanks in advance.

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  • Windows32 API: "mov edi,edi" on function entry?

    - by Ira Baxter
    I'm stepping through Structured Error Handling recovery code in Windows 7 (e.g, what happens after SEH handler is done and passes back "CONTINUE" code). Here's a function which is called: 7783BD9F mov edi,edi 7783BDA1 push ebp 7783BDA2 mov ebp,esp 7783BDA4 push 1 7783BDA6 push dword ptr [ebp+0Ch] 7783BDA9 push dword ptr [ebp+8] 7783BDAC call 778692DF 7783BDB1 pop ebp 7783BDB2 ret 8 I'm used to the function prolog of "push ebp/mov ebp,esp". What's the purpose of the "mov edi,edi"?

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  • Searching in Xcode not finding results (searching my source)

    - by brs
    I'm pulling my hair out on this and Google results are skewed since it thinks I want to find out how to code something. My problem is that when trying to search my code with the String Matching box it finds nothing, even if I enter something that is on the screen below. Is it Spotlight that is delivering these results? I'm not excluding anything in my Spotlight index so should I just rebuild the index? Thanks for any help you can offer.

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  • LinkButton Click event ignored

    - by Craig
    I have the following Hyperlink as a button:- <asp:LinkButton ID="loginButton" runat="server" CssClass="loginButton" Text="LOGIN" OnClientClick="return validateLogin(memNoID,pwID)" AddressOf="loginButton.Click"></asp:LinkButton> It causes a postback but only executes the onload and prerender sections of code. It totally ignores the following function signature:- Protected Sub loginButton_Click(ByVal sender As Object, ByVal e As EventArgs) Some code End Sub Any pointers appreciated.

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  • Url rewriting issue

    - by Suriyan Suresh
    i have used the following code in .htaccess Options +FollowSymlinks RewriteEngine On RewriteBase / RewriteRule ^company/aboutus$ aboutus.php [NC,L] RewriteRule ^company/contactus$ contactus.php [NC,L] RewriteRule ^company/careers$ careers.php [NC,L] RewriteRule ^/$ index.php [NC,L] the above code works but aboutus page loading without any css and images. no company folder, i have used company word for url redability

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  • Printf in assembler doesn't print

    - by Gaim
    Hi there, I have got a homework to hack program using buffer overflow ( with disassambling, program was written in C++, I haven't got the source code ). I have already managed it but I have a problem. I have to print some message on the screen, so I found out address of printf function, pushed address of "HACKED" and address of "%s" on the stack ( in this order ) and called that function. Called code passed well but nothing had been printed. I have tried to simulate the environment like in other place in the program but there has to be something wrong. Do you have any idea what I am doing wrong that I have no output, please? Thanks a lot EDIT: This program is running on Windows XP SP3 32b, written in C++, Intel asm there is the "hack" code CPU Disasm Address Hex dump Command Comments 0012F9A3 90 NOP ;hack begins 0012F9A4 90 NOP 0012F9A5 90 NOP 0012F9A6 89E5 MOV EBP,ESP 0012F9A8 83EC 7F SUB ESP,7F ;creating a place for working data 0012F9AB 83EC 7F SUB ESP,7F 0012F9AE 31C0 XOR EAX,EAX 0012F9B0 50 PUSH EAX 0012F9B1 50 PUSH EAX 0012F9B2 50 PUSH EAX 0012F9B3 89E8 MOV EAX,EBP 0012F9B5 83E8 09 SUB EAX,9 0012F9B8 BA 1406EDFF MOV EDX,FFED0614 ;address to jump, it is negative because there mustn't be 00 bytes 0012F9BD F7DA NOT EDX 0012F9BF FFE2 JMP EDX ;I have to jump because there are some values overwritten by the program 0012F9C1 90 NOP 0012F9C2 0090 00000000 ADD BYTE PTR DS:[EAX],DL 0012F9C8 90 NOP 0012F9C9 90 NOP 0012F9CA 90 NOP 0012F9CB 90 NOP 0012F9CC 6C INS BYTE PTR ES:[EDI],DX ; I/O command 0012F9CD 65:6E OUTS DX,BYTE PTR GS:[ESI] ; I/O command 0012F9CF 67:74 68 JE SHORT 0012FA3A ; Superfluous address size prefix 0012F9D2 2069 73 AND BYTE PTR DS:[ECX+73],CH 0012F9D5 203439 AND BYTE PTR DS:[EDI+ECX],DH 0012F9D8 34 2C XOR AL,2C 0012F9DA 2066 69 AND BYTE PTR DS:[ESI+69],AH 0012F9DD 72 73 JB SHORT 0012FA52 0012F9DF 74 20 JE SHORT 0012FA01 0012F9E1 3120 XOR DWORD PTR DS:[EAX],ESP 0012F9E3 6C INS BYTE PTR ES:[EDI],DX ; I/O command 0012F9E4 696E 65 7300909 IMUL EBP,DWORD PTR DS:[ESI+65],-6F6FFF8D 0012F9EB 90 NOP 0012F9EC 90 NOP 0012F9ED 90 NOP 0012F9EE 31DB XOR EBX,EBX ; hack continues 0012F9F0 8818 MOV BYTE PTR DS:[EAX],BL ; writing 00 behind word "HACKED" 0012F9F2 83E8 06 SUB EAX,6 0012F9F5 50 PUSH EAX ; address of "HACKED" 0012F9F6 B8 3B8CBEFF MOV EAX,FFBE8C3B 0012F9FB F7D0 NOT EAX 0012F9FD 50 PUSH EAX ; address of "%s" 0012F9FE B8 FFE4BFFF MOV EAX,FFBFE4FF 0012FA03 F7D0 NOT EAX 0012FA05 FFD0 CALL EAX ;address of printf This code is really ugly because I am new in assembler and there mustn't be null bytes because of buffer-overflow bug

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  • changing ASP.NET tag formatting

    - by Steven
    When I drag a Label control to my document, I get the following code : <asp:Label ID="Label1" runat="server" text="Label"></asp:Label> I prefer my code to look like the following instead : <asp:Label ID="Label1" runat="server" Text="Label" /> How can I get .NET to do this by default? I looked in Tools - Options - Text Editor, where you'd expect to find it, but I couldn't find anything relevant there.

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  • saving multiple files through xcopy in a batch file

    - by sushant
    for %f in (D:\flexcube1,D:\flexcube2,D:\flexcube3) do xcopy %f D:\o\ /e when i use the following code in command prompt, it works fine. but when i use the same code in a batch file, nothing happens. my batch file simply consists of: for %f in (D:\flexcube1,D:\flexcube2,D:\flexcube3) do xcopy %f D:\o\ /e but it does not work. i dont understand it and i have to use a batch file to copy multiple files. any help is really appreciated

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  • Using MySQL in Pydev Eclipse

    - by Hossein
    Hi, I am trying to access a MySQL database with python through Pydev Eclipse. I have installed the necessary files to access MysQL from python and I can access the database only when I write code in Python IDLE environment and run it from command prompt. However I am not able to run my applications from Pydev. when I use this "import MysqlDB" i get an error, but in IDLE no errors and my code runs very smoothly. Does anyone know were the problem is? Thanks

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  • In C, do braces act as a stack frame?

    - by Claudiu
    If I create a variable within a new set of curly braces, is that variable popped off the stack on the closing brace, or does it hang out until the end of the function? For example: void foo() { int c[100]; { int d[200]; } //code that takes a while return; } Will d be taking up memory during the code that takes a while section?

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  • Xcode acting strange

    - by Moshe
    I am typing code from Head First iPhone Development (O'reilly) and Xcode will build and run fine once and then, without any modification to the code, the second build will fail. Why?(I'm using command+R)

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  • PHP next MySQL row - how to move pointer until function checks true?

    - by ropbhardgood
    I have a PHP script which takes a value from a row in my MySQL database, runs it through a function, and if it determines it's true returns one value, and if it's false, it needs to go to the next value in the database and check that one until eventually one returns true. I think I need to use mysql_fetch_assoc, but I'm not really sure in what way to use it... I wish I could post my code to be more specific, but it's a lot of code and most of it has no bearing on this issue...

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  • How to trim whitespace from bash variable?

    - by too much php
    I have a shell script with this code: var=`hg st -R "$path"` if [ -n "$var" ]; then echo $var fi But the conditional code always executes because hg st always prints at least one newline character. Is there a simple way to strip whitespace from $var (like trim() in php)? or Is there a standard way of dealing with this issue? I could use sed or awk, but I'd like to think there is a more elegant solution to this problem.

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  • How do you decide which API function documentations to read and how seriously?

    - by Uri
    Suppose that you are writing or maintaining a piece of code that uses some API that you are not 100% familiar with. How do you decide whether to read the documentation of a certain call target, and how much time to spend reading it? How do you decide not to read it? (Let's assume you can read it by opening the HTML documentation, inspecting the source code, or using the hover mechanism in the IDE).

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  • Open PDF file on fly from Java application

    - by Mr CooL
    Is there any way to have a code where it can be used to open PDF file in Java application but do not side to any platform. I mean using batch file in Windows could do that. Can it be any other way to have platform independent code to open PDF on fly.

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  • compiler warning at C++ template base class

    - by eike
    I get a compiler warning, that I don't understand in that context, when I compile the "Child.cpp" from the following code. (Don't wonder: I stripped off my class declarations to the bare minuum, so the content will not make much sense, but you will see the problem quicker). I get the warning with VS2003 and VS2008 on the highest warning level. The code AbstractClass.h : #include <iostream> template<typename T> class AbstractClass { public: virtual void Cancel(); // { std::cout << "Abstract Cancel" << std::endl; }; virtual void Process() = 0; }; //outside definition. if I comment out this and take the inline //definition like above (currently commented out), I don't get //a compiler warning template<typename T> void AbstractClass<T>::Cancel() { std::cout << "Abstract Cancel" << std::endl; } Child.h : #include "AbstractClass.h" class Child : public AbstractClass<int> { public: virtual void Process(); }; Child.cpp : #include "Child.h" #include <iostream> void Child::Process() { std::cout << "Process" << std::endl; } The warning The class "Child" is derived from "AbstractClass". In "AbstractClass" there's the public method "AbstractClass::Cancel()". If I define the method outside of the class body (like in the code you see), I get the compiler warning... AbstractClass.h(7) : warning C4505: 'AbstractClass::Cancel' : unreferenced local function has been removed with [T=int] ...when I compile "Child.cpp". I do not understand this, because this is a public function and the compiler can't know if I later reference this method or not. And, in the end, I reference this method, because I call it in main.cpp and despite this compiler warning, this method works if I compile and link all files and execute the program: //main.cpp #include <iostream> #include "Child.h" int main() { Child child; child.Cancel(); //works, despite the warning } If I do define the Cancel() function as inline (you see it as out commented code in AbstractClass.h), then I don't get the compiler warning. Of course my program works, but I want to understand this warning or is this just a compiler mistake? Furthermore, if do not implement AbsctractClass as a template class (just for a test purpose in this case) I also don't get the compiler warning...?

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  • FileUpload ASP.NET control not working under Windows 7

    - by YourMomzThaBomb
    I have a User Control that contains a System.Web.UI.WebControls.FileUpload control as well as a button to 'Submit'. When the button is clicked code similar to the following is executed: If FileUploadControl.HasFile Then 'Save the file and do some other stuff End If This code works just fine with Windows XP. However, if I run it from a Windows 7 64-bit machine using IE8 32-bit the HasFile property always returns false and nothing is saved?! Any suggestions/ideas would be greatly appreciated.

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  • In Bjarne's book.

    - by atch
    Guys in one of excersises (ch.5,e.8) from TC++PL Bjarne asks to do following: '"Run some tests to see if your compiler really generates equivalent code for iteration using pointers and iteration using indexing. If different degrees of optimization can be requested, see if and how that affects the quality of the generated code"' Any idea how to eat it and with what? Thanks in advice.

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  • send credentials with url, possible?

    - by Dejan.S
    Hi. I got a web service that I protect with basic authentication and use ssl. to make it easy for the clients that are gone use this web service I want to skip the 401 and send the credentials with the url (I would like so the customer can access the web service with url from their code / web app), question is this possible? I know about headers but a lot of the clients gone use this do not got the proper developing team to do code. thanks

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