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• Entity Framework: Setting EntityReference EntityKey causes exception on save

  - by NYSystemsAnalyst

  I have a table with a ModifiedUserID field that is a foreign key to a User table. In entity framework, I'm loading the first table, but not the users table. I have the user ID of the current user, and would like to set the ModifiedUserID to that value for all entities that have been modified prior to saving. Before calling SaveChanges(), I use the ObjectStateManager to get all modified entities. Since I do not have the user object, but I do have the user ID, I set the EntityReference.EntityKey property as follows: entity.UserReference.EntityKey = New EntityKey("MyContainer.User", "UserID", DatabaseUserID) This works fine, but when I execute SaveChanges(), I receive the following error: A relationship is being added or deleted from an AssociationSet 'FK_Table1_User'. With cardinality constraints, a corresponding 'Table1' must also be added or deleted. Now, I see that setting the EntityReference.EntityKey creates a new AssociationSet entry, but how to I prevent this error?

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• sudo changes PATH - why?

  - by Michiel de Mare

  This is the PATH variable without sudo: $ echo 'echo $PATH' | sh /opt/local/ruby/bin:/usr/bin:/bin This is the PATH variable with sudo: $echo 'echo $PATH' | sudo sh /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin As far as I can tell, sudo is supposed to leave PATH untouched. What's going on? How do I change this? (This is on Ubuntu 8.04). UPDATE: as far as I can see, none of the scripts started as root change PATH in any way. From man sudo: To prevent command spoofing, sudo checks ``.'' and ``'' (both denoting current directory) last when searching for a command in the user's PATH (if one or both are in the PATH). Note, however, that the actual PATH environment variable is not modified and is passed unchanged to the program that sudo executes.

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• Make a Method of the Business Layer secure. best practice / best pattern [.net/c#]

  - by gsharp

  Hi We are using ASP.NET with a lot of AJAX "Page Method" calls. The WebServices defined in the Page invokes methods from our BusinessLayer. To prevent hackers to call the Page Methods, we want to implement some security in the BusinessLayer. We are struggling with two different issues. First one: public List<Employees> GetAllEmployees() { // do stuff } This Method should be called by Authorized Users with the Role "HR". Second one: public Order GetMyOrder(int orderId) { // do sutff } This Method should only be called by the owner of the Order. I know it's easy to implement the security for each method like: public List<Employees> GetAllEmployees() { // check if the user is in Role HR } or public Order GetMyOrder(int orderId) { // check if the order.Owner = user } What I'm looking for is some pattern/best practice to implement this kind of security in a generic way (without coding the the if then else every time) I hope you get what i mean :-) Thanks for you help.

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• How can I increase my application memory, till using the VirtualAlloc function, with the WOW64?

  - by fishbein

  I have application that runs on x86 32Win and we use 1.2Gbyte memory which allocated from the function VirtualAlloc(to prevent page faults). I really want to increase my application memory so I recompiled my project under MSDVE 2008 with wow64 (OS Exp 64Bit). I tried to allocate more than 2Gbyte and the function VirtualAlloc return error. I even tried to set the flag LARGEADDRESSWARE to on, and the result was the same! How can I increase my application memory, till using the VirtualAlloc function, with the WOW64?

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• Show ContextMenuStrip from ToolStripDropDown without dismissing ToolStripDropDown

  - by Jacob G

  I have a ToolStrip. In my ToolStrip I have a ToolStripDropDownButton. My ToolStripDropDownButton has a DropDown of type ToolStripDropDown that contains a ToolStripControlHost which contains a Label. I have assigned a ContextMenuStrip to my Label. When I show the DropDown and right-click on the label, the ContextMenuStrip displays correctly, but the original DropDown is dismissed. I can understand the existence of underlying code to prevent the display of two "ToolStripItems" at the same time and I'm assuming that's what I'm running in to here. Anybody know of a way around it?

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• Debugging a Browser Redirect Loop

  - by just_wes

  Hi all, I am using CakePHP with the Auth and ACL components. My page loads fine for non-registered users, but if I try to log in as a registered user I get an infinite redirect loop in the browser. I am sure that this is some sort of permissions problem, but the problem exists even for users who have permissions for everything. The only way to prevent this behavior is to allow '*' in my AppController's beforeFilter method. What is the best way to debug this sort of problem? Thanks!

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• Nil string with [NSString stringWithFormat:] appears as "(null)"

  - by Supernico

  I have a 'Contact' class with two properties : firstName and lastName. When I want to display a contact's full name, here is what I do: NSString *fullName = [NSString stringWithFormat:@"%@ %@", contact.firstName, contact.lastName]; But when the firstName and/or lastName is set to nil, I get a "(null)" in the fullName string. To prevent it, here's what I do: NSString *first = contact.firstName; if(first == nil) first = @""; NSString *last = contact.lastName; if(last == nil) last = @""; NSString *fullName = [NSString stringWithFormat:@"%@ %@", first, last]; Does someone know a better/more concise way to do this?

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• Make a Method of the Business Layer secure. best practice / best pattern

  - by gsharp

  We are using ASP.NET with a lot of AJAX "Page Method" calls. The WebServices defined in the Page invokes methods from our BusinessLayer. To prevent hackers to call the Page Methods, we want to implement some security in the BusinessLayer. We are struggling with two different issues. First one: public List<Employees> GetAllEmployees() { // do stuff } This Method should be called by Authorized Users with the Role "HR". Second one: public Order GetMyOrder(int orderId) { // do sutff } This Method should only be called by the owner of the Order. I know it's easy to implement the security for each method like: public List<Employees> GetAllEmployees() { // check if the user is in Role HR } or public Order GetMyOrder(int orderId) { // check if the order.Owner = user } What I'm looking for is some pattern/best practice to implement this kind of security in a generic way (without coding the the if then else every time) I hope you get what i mean :-)

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• No-argument method on window.external is invoked when checking with typeof

  - by janko

  Hi, I am trying to display an HTML page with embedded JavaScript code inside a System.Windows.Forms.WebBrowser control. The JavaScript code is expected to interact with the embedding environment through the window.external object. Before invoking a method on window.external, JavaScript is supposed to check for the existance of the method. If it is not there, the code should invoke a generic fallback method. // basic idea if (typeof(window.external.MyMethod) != 'undefined') { window.external.MyMethod(args); } else { window.external.Generic("MyMethod", args); } However, checking for a no-argument method with typeof seems to invoke the method already. That is, if MyMethod accepts any positive number of arguments, the code above will work perfectly; but, if MyMethod is a no-argument method, then the expression typeof(window.external.MyMethod) will not check for its type but invoke it, too. Is there any work-around to this behavior? Can I somehow escape the expression window.external.MyMethod to prevent the method call from occurring?

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• Multiple storages using localStorage

  - by Blondie

  Hey, Is it possible that the same name used can have many different values stored separately and to be shown in a list? e.g. function save() { var inputfield = document.getElementById('field').innerHTML; localStorage['justified'] = inputfield; } <input type="text" id="field" onclick="save();" /> Everytime someone enters something in the input field, and click on save, the localstorage will only save the value in the same name, however, does this conflict the way storage are saved, like being replaced with the latest input value? Also, is there anyway to prevent clearing the localstorage when clearing the cache? Thanks.

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• How can I selectively override a django .count() method

  - by Tom Viner

  I'm using postGresSQL and my main table has about 20,000 rows. Sometimes count() methods can take ages or even timeout. Mod.manager.filter(...).count() I need to selectively override the count() method depending on what filter has been applied. Just having a cache of results would be a great gain but I'd like to be able to say: if filter query is just {'enabled'=True} then return 20,000 without touching the db. Note: I can't prevent the call to .count() as it's inside django's pagination, which always does a count.

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• Easy to use/learn PHP framework?

  - by Meredith

  I need to build a php app, and I was thinking about using a framework (never used one before). I've been browsing around some but most of them seems kinda complicated, I really liked what I saw about Symfony, but it looks like I will have to spend like a month until I really understand how to use it, and in one month I could code the app I have in mind 5 times without a framework. But I want to use one to "standardize" my code and prevent bugs. So I was wondering if someone could share with me which php frameworks you think are easier to learn how to use. My application will use mysql, and it will have some sort of "search engine" to search data that will be populated on the database using a few "scraper scripts" (that I also wants to code using the framework).

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• problem with 512x512 app icon in iTunes Connect

  - by Matthew

  I'm uploading my app to App Store and I created it in iTunes Connect. I just uploaded my 512x512px icon and then I opened Version Summary page to verify my information... I've got a set of icon that just have gloss effect. In Version Summary page I see my 512x512px icon with automatic gloss added. Is there a way to prevent this? My large app icon mustn't have gloss... In my info.plist I added the line "Icon already includes gloss effects" and I checked the box near it... Can anyone help me?

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• How to determine where a Mailitem is being opened from in Outlook 2007 using VSTO 2005 SE

  - by Adam

  I have an Outlook 2007 Add-in in VSTO 2005 SE that allows users to save e-mails into our document management system. From within our system users are able to open e-mails they have previously saved. However, when doing so I need to try and prevent them from saving them again. I am trying to figure out how to determine if the Mailitem being opened is coming from the Outlook e-mail client or from an external source. I know that normally the EntryId Property of the Mailitem is null or empty string when a Mailitem has not been previously saved in Outlook, however, it seems like when a Mailitem is being opened from within our system the EntryID is not null.

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• Can in-memory SQLite databases scale with concurrency?

  - by Kent Boogaart

  In order to prevent a SQLite in-memory database from being cleaned up, one must use the same connection to access the database. However, using the same connection causes SQLite to synchronize access to the database. Thus, if I have many threads performing reads against an in-memory database, it is slower on a multi-core machine than the exact same code running against a file-backed database. Is there any way to get the best of both worlds? That is, an in-memory database that permits multiple, concurrent calls to the database?

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• how to keep the value of a variable in a closure

  - by Florian Fida

  i need to create multiple javascript functions which have a static id inside, so the function itself knows what data to process. Here is some code: (function(){ function log(s){ if(console && console.log) console.log(s); else alert(s); } var i = 10; while (i--){ window.setTimeout(function(){ // i need i to be 10, 9, 8... here not -1 log(i); },500); } })(); The problem ist that i allways gets updated by the loop, and i need to prevent this. Thanks in advance for any help, comments or tips!

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• Using Angularjs with server side templates

  - by codecollision

  For SEO purposes the server renders out the full html template for a given URL on initial load. The site uses angularjs which detects the URL route and renders a client template from the JSON API. For example, you navigate to: /blog/post-title Server responds with post-title content. Angular loads, detects route: /blog/:post_slug and begins to load JSON and render client side template from response. Obviously what Angular does is fine when links are followed after the initial load, but on first load it duplicates effort. My question is if there is a clean way to prevent this situation.

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• Select distinct... in fulltext search

  - by lam3r4370

  <?php session_start(); $user =$_GET['user']; $conn = mysql_connect("localhost","...","..."); mysql_select_db("..."); $sql= "SELECT filter FROM userfilter WHERE user='$user'"; $mksql = mysql_query($sql); while($row =mysql_fetch_assoc($mksql)) { $filter=$row['filter']; $sql2 = "SELECT DISTINCT * FROM rss WHERE MATCH(content,title) AGAINST ('$filter')"; $mksql2 = mysql_query($sql2) or die(mysql_error()); while($rows=mysql_fetch_assoc($mksql2)) { echo ..... } ?> If I have two rows content that contains the $filter ,it outputs me that content but it's repeating. For example: title|content asd |This is a sample content ,number one das |This is a sample content ,number two .... And if my keywords are "sample" and "number" ,it outputs me twice the title and the content.How to prevent that?

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• How do I trigger a single event defined for a class of objects

  - by mrbinky3000

  I have a question. I have 8 buttons that have unique incrementing id's and a shared class. <button class="btnChapter" id="btnChapter_1" value="1">1</button> <button class="btnChapter" id="btnChapter_2" value="2">2</button> <button class="btnChapter" id="btnChapter_3" value="3">3</button> ... In order to prevent me from duplicating code, I bound a click event to the btnChapter class instead of binding an event individually to each button's ID. $('.btnChapter').click(function(){ .. do stuff .. }); How do I trigger() the click() event only for #btnChapter_2? The following doesn't seem to work. $('#btnChapter_2').click()

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• sp_executesql with 'IN' statement

  - by user300992

  I am trying to use sp_executesql to prevent SQL injection in SQL 2005, I have a simple query like this: SELECT * from table WHERE RegionCode in ('X101', 'B202') However, when I use sp_executesql to execute the following, it doesn't return anything. Set @Cmd = N'SELECT * FROM table WHERE RegionCode in (@P1)' SET @ParamDefinition = N'@P1 varchar(100)'; DECLARE @Code as nvarchar(100); SET @Code = 'X101,B202' EXECUTE sp_executesql @Cmd, @ParamDefinition, @P1 = @Code The is what I have tested: SET @Code = 'X101' <-- This works, it returns a single region SET @Code = 'X101,B202' <--- Returns nothing SET @Code = '''X101'',''B202''' <-- Returns nothing Please help.... what did I do wrong?

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• PHP reads 1.10 value as 1.1 (0 at end of variable not honored)

  - by adbox

  Hello, This is hard for me to word, but easier for me to demonstrate: I have a select option: <option <?php if($frequency[$key]=='1.10'){echo "selected";}?> value='1.10'>1 every 10 days</option> Really, $frequency[$key]=1.1; , but the above still shows up selected. I've never seen this before, and didnt know it could happen. Any ideas on how to prevent this? Working with php5. Thank you, Hudson

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• Sending out 20,000+ emails with asp.net

  - by Kyle

  I am writing an application that will need to send a massive amount of emails to our students who will be selected from our database (each email will be personalized to the extent that will include their name, course of study etc...so needs to be sent one at a time). I could do this looping over an SmtpClient, but I'm afraid that with the numbers I'm trying to send, I'll ultimately run into timeout issues or my thread being killed because of lack of machine resources. At this point I'm just looking for suggestions of a better way to handle this, or if looping over SmtpClient is an ok solution, how I should go about handling it to prevent what I posted above. Would a web service be a better alternative? Please advise, TIA

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• How to protect against GHC7 compiled programs taking all memory?

  - by Petr Pudlák

  When playing with various algorithms in Haskell it often happens to me that I create a program with a memory leak, as it often happens with lazy evaluation. The program taking all the memory isn't really fun, I often have difficulty killing it if I realize it too late. When using GHC6 I simply had export GHCRTS='-M384m' in my .bashrc. But in GHC7 they added a security measure that unless a program is compiled with -rtsopts, it simply fails when it is given any RTS option either on a command line argument or in GHCRTS. Unfortunately, almost no Haskell programs are compiled with this flag, so setting this variable makes everything to fail (as I discovered in After upgrading to GHC7, all programs suddenly fail saying "Most RTS options are disabled. Link with -rtsopts to enable them."). Any ideas how to make any use of GHCRTS with GHC7, or another convenient way how to prevent my programs taking all memory?

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• Make Java parent class not part of the interface

  - by Bart van Heukelom

  (This is a hypothetical question for discussion, I have no actual problem). Say that I'm making an implementation of SortedSet by extending LinkedHashMap: class LinkedHashSortedMapThing extends LinkedHashMap implements SortedSet { ... } Now programmers who use this class may do LinkedHashMap x = new LinkedHashSortedMapThing(); But what if I consider the extending of LinkedHashMap an implementation detail, and do not want it to be a part of the class' contract? If people use the line above, I can no longer freely change this detail without worrying about breaking existing code. Is there any way to prevent this sort of thing, other than favouring composition over inheritance (which is not always possible due to private/protected members)?

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• How to create a non-persistent Elixir/SQLAlchemy object?

  - by siebert

  Hi, because of legacy data which is not available in the database but some external files, I want to create a SQLAlchemy object which contains data read from the external files, but isn't written to the database if I execute session.flush() My code looks like this: try: return session.query(Phone).populate_existing().filter(Phone.mac == ident).one() except: return self.createMockPhoneFromLicenseFile(ident) def createMockPhoneFromLicenseFile(self, ident): # Some code to read necessary data from file deleted.... phone = Phone() phone.mac = foo phone.data = bar phone.state = "Read from legacy file" phone.purchaseOrderPosition = self.getLegacyOrder(ident) # SQLAlchemy magic doesn't seem to work here, probably because we don't insert the created # phone object into the database. So we set the id fields manually. phone.order_id = phone.purchaseOrderPosition.order_id phone.order_position_id = phone.purchaseOrderPosition.order_position_id return phone Everything works fine except that on a session.flush() executed later in the application SQLAlchemy tries to write the created Phone object to the database (which fortunatly doesn't succeed, because phone.state is longer than the data type allows), which breaks the function which issues the flush. Is there any way to prevent SQLAlchemy from trying to write such an object? Ciao, Steffen

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