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• What is the best way to handle validity dates in applications ?

  - by user214626

  Hello, How do we model these objects ? Scenario 1: Price changes in a time period EffectiveDate ExpiryDate Price 2009-01-01 2009-01-31 800$ 2009-02-01 Null 900$ So, if the price changes to 910$ on 2009-02-15, then the system should automatically update the expiry date on the previous effective price to 2009-02-14, to keep it consistent. Scenario 2: No price specified between 2009-02-01 to 2009-02-28 EffectiveDate ExpiryDate Price 2009-01-01 2009-01-31 800$ 2009-03-01 Null 900$ So, if new price is specified for 2009-02-15 onwards , then the system should automatically set the expiry date on the record to be inserted to 2009-02-28, because already a record effective from 2009-03-01 exists. Please suggest an effective way to handle these scenarios to model my framework, or are there any frameworks around that can do this . Thanks

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• how to get the sql connection

  - by sweetsecret

  FS_Setting is a VB class which has all the details of the connections ie: Public Class FS_Setting Public Function Get_RS_Connection() As SqlConnection Try Get_RS_Connection = New SqlConnection("Data Source=***********;User ID=sa;Password=*****;database=*********") Catch ex As System.Exception Throw New System.Exception("Get_RS_Connection Error:" + ex.Message) End Try End Function I need to call the function Get_RS_Connection() in a different class instead of getting the connection all the way again and hard coding.... I want to call the above class where the SQL connection is declared Namespace FS_Library Public Class FS_Errorlog Inherits FS_BaseClass Try **cn = New SqlConnection("Data Source=***********;UserID=sa;Password=*****;database=*********")** cmd = New SqlCommand("dbo.FS_ErrorLog_ADD", cn) cmd.CommandType = CommandType.StoredProcedure cmd.CommandTimeout = Convert.ToInt32(ConfigurationSettings.AppSettings("Command_Timeout")) Me.AddParameter(cmd, "@p_tableKey", SqlDbType.Int, tableKey) Me.AddParameter(cmd, "@p_FunctionCode", SqlDbType.Int, FunctionCode) Me.AddParameter(cmd, "@p_TableAlias", SqlDbType.VarChar, TableAlias) Me.AddParameter(cmd, "@p_ValidationCode", SqlDbType.Int, ValidationCode) If Filename = "" Then Filename = "N/A" End If Me.AddParameter(cmd, "@p_FileName", SqlDbType.VarChar, Filename) Me.AddParameter(cmd, "@p_Message", SqlDbType.VarChar, Message) Me.AddParameter(cmd, "@p_CreateUser", SqlDbType.VarChar, userID) Me.AddParameter(cmd, "@p_UserActionID", SqlDbType.UniqueIdentifier, UserActionID) cn.Open()

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• UrlHelper and ViewContext inside an Authorization Attribute

  - by DM

  I have a scenario that I haven't been able to solve: I'm toying around with creating my own custom authorization attribute for mvc. The main bit of functionality I would like to add is to have the ability to change where the user gets redirected if they are not in a certain role. I don't mind that the system sends them back to the login page if they're not authenticated, but I would like to choose where to send them if they are authenticated but not allowed to access that action method. Here's is what I would like to do: public class CustomAuthorizeAttribute : AuthorizeAttribute { public string Action; public string Controller; protected override bool AuthorizeCore(System.Web.HttpContextBase httpContext) { // if User is authenticated but not in the correct role string url = Url.Action(this.Action, this.Controller); httpContext.Response.Redirect(url); } } And as an added bonus I would like to have access to ViewContext and TempData before I do the redirect. Any thoughts on how I could get instantiate a UrlHelper and ViewContext in the attribute?

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• Android: How to read a txt file which contains Chinese characters?

  - by TianDong

  Hallo, i have a txt file which contains many chinese characters, and the txt file is in the directory res/raw/test.txt. I want to read the file but somehow i can't make the chinese characters displayed correctly. Here is my code: try { InputStream inputstream = getResources().openRawResource(R.raw.test); BufferedReader bReader = new BufferedReader(new InputStreamReader(inputstream,Charset.forName("UTF-8"))); String line = null; while ((line= bReader.readLine())!= null) { Log.i("lolo", line); System.out.println("here is some chinese character ???????"); } } catch (IOException e) { e.printStackTrace(); } Both Log.i("lolo", line); and System.out.println("here is some chinese character ???????") don't show characters correctly, i can not even see the chinese characters in the println() method. What can i do to fix this problem? Can anybody help me?

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• What does this error states in asp.net-mvc?

  - by Pandiya Chendur

  I have repository class in asp.net mvc which has this, public Material GetMaterial(int id) { return db.Materials.SingleOrDefault(m => m.Mat_id == id); } And my controller has this for details action result, ConstructionRepository consRepository = new ConstructionRepository(); public ActionResult Details(int id) { Material material = consRepository.GetMaterial(id); return View(); } But why i get this error, The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Details(Int32)' in 'CrMVC.Controllers.MaterialsController'. To make a parameter optional its type should be either a reference type or a Nullable type. Parameter name: parameters Any suggestion...

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• Jabber .net rostertree error

  - by Farooq

  Hi, Whenever I add the rostertree control to my form, I can see that the PresenceManager and RosterManager property values for it have this error listed: "Unable to cast object of type 'System.Windows.Forms.DataGridViewTextBoxColumn' to type 'System.ComponentModel.Component'." I can compile the solution and all but this error keeps popping up randomly. Can someone advice when this may happen. I'm thinking it has to do with the controls not being added properly. I'm using Visual Studio 2008. Thanks.

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• How do I synchronize access to shared memory in LynxOS/POSIX?

  - by GrahamS

  I am implementing two processes on a LynxOS SE (POSIX conformant) system that will communicate via shared memory. One process will act as a "producer" and the other a "consumer". In a multi-threaded system my approach to this would be to use a mutex and condvar (condition variable) pair, with the consumer waiting on the condvar (with pthread_cond_wait) and the producer signalling it (with pthread_cond_signal) when the shared memory is updated. How do I achieve this in a multi-process, rather than multi-threaded, architecture? Is there a LynxOS/POSIX way to create a condvar/mutex pair that can be used between processes? Or is some other synchronization mechanism more appropriate in this scenario?

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• How to access the theming Fonts and Colors on GTK/Gnome

  - by Lothar

  Lets say i want to write a special text editor widget. How can i get the default themed colors for texts, selected text and background and which are the users default fonts? I see that GNOME does define 5 special system fonts and default sizes for this purpose in the GNOME Appearance Configuration dialog, but i haven't found a single word in the GTK documentation how to access them (and the GTK mailing list is a joke:-( ). Windows and Cocoa both give me dozens of system values. I found the GtkStyle class but this doesn't seem to be what i need.

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• Python - filter by date

  - by Johnny

  how do i count how many logins were done per day on a system using the log file n python?

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• Regex - Ignore lines with matching text

  - by codem

  I need the RegEx command to get all the lines which DO NOT have the job name containing "filewatch". Any help will be greatly appreciated! Thanks. STATUS: FAILURE JOB: i3-imds-dcp-pd-bo1-05-ftpfilewatcher STATUS: FAILURE JOB: i3-cur-atmrec-pd-TD_FTP_Forecast_File_Del_M_Su ALARM: JOBFAILURE JOB: i3-cur-atmrec-pd-TD_FTP_Forecast_File_Del_M_Su STATUS: FAILURE JOB: i3-sss-system-heartbeat ALARM: JOBFAILURE JOB: i3-sss-system-heartbeat STATUS: FAILURE JOB: i3-chq-cspo-pd-batch-daily-renametable-fileok STATUS: FAILURE JOB: i3-chq-cspo-pd-batch-daily-renametable-file ALARM: JOBFAILURE JOB: i3-chq-cspo-pd-batch-daily-renametable-fileok ALARM: JOBFAILURE JOB: i3-chq-cspo-pd-batch-daily-renametable-file STATUS: FAILURE JOB: i3-imds-dcp-pd-bo1-35-filewatcher STATUS: FAILURE JOB: i3-imds-dcp-pd-bo1-05-ftpfilewatcher STATUS: FAILURE JOB: i3-imds-dcp-pd-bo1-35-filewatcher STATUS: FAILURE JOB: i3-imds-dcp-pd-bo1-05-ftpfilewatcher

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• Integrating Pentaho/Talend/etc. with an OR Mapper

  - by DaDaDom

  We have an application (Java) with an own OR mapper. Within this system we have what can be compared to Hibernate's interceptors (we call it triggers): Do specific actions just before saving data in the database, after it's deleted and so on. The underlying database is MySQL. Now we would like to use tools such as Pentaho Data Integration or Talend to convert data to put it into our system. It's no problem to do that directly on the SQL level, but by doing so we loose the built-in power of our triggers. Is there a way to somehow integrate any of the Data Integration solutions into our existing application? It would be great if there was a way to write into instances of our classes instead of writing into the database directly. Any hints welcome :-)

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• Building a specific piece of Android platform?

  - by Chrisc

  Hi, I have been trying to build only the "/libcore" directory of the Android platform. When I try mmm libcore I end up with the following output: ============================================ PLATFORM_VERSION_CODENAME=REL PLATFORM_VERSION=2.1-update1 TARGET_PRODUCT=generic TARGET_BUILD_VARIANT=eng TARGET_SIMULATOR=false TARGET_BUILD_TYPE=release TARGET_ARCH=arm HOST_ARCH=x86 HOST_OS=linux HOST_BUILD_TYPE=release BUILD_ID=ECLAIR ============================================ make: Entering directory `/home/chris/android/platform' target Prebuilt: (out/target/product/generic/system/etc/security/cacerts.bks) host Prebuilt: run-core-tests-on-ri (out/host/linux-x86/obj/EXECUTABLES/run-core-tests-on-ri_intermediates/run-core-tests-on-ri) target Prebuilt: run-core-tests (out/target/product/generic/obj/EXECUTABLES/run-core-tests_intermediates/run-core-tests) Copy: out/target/product/generic/system/etc/apns-conf.xml Copying: out/target/common/obj/JAVA_LIBRARIES/core_intermediates/classes-full-debug.jar Copying: out/target/common/obj/JAVA_LIBRARIES/core-tests_intermediates/classes-full-debug.jar /bin/bash: jar: command not found make: *** [out/host/common/core-tests.jar] Error 127 make: *** Deleting file `out/host/common/core-tests.jar' make: Leaving directory `/home/chris/android/platform' Does anyone have any suggestions on what Error 127 is, or another method I can go about building "libcore" without having to build the entire platform again? Thanks, Chris

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• Best XML Based Database

  - by monmonja

  I had been assigned to develop a system on where we would get a XML from multiple sources (millions of xml) and put them in some database like and judging from the xml i would receive, there wont be any concrete structure even if they are from the same source. With this reason i think i cannot suggest RDMS and currently looking at NoSQL databases. We need a system that could do CRUD and is fast on Read. I had been looking at MarkLogic and eXist, which are both XML based NoSQL databases, have anyone had experience with them? and any other suggestion? Thanks

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• Unable to retrieve the complete description string of the event log record

  - by Santosh Pillai

  Hi All, I have an MFC application that reads and displays event log records using the ::ReadEventLog() API. The problem is with reading the "Description" message string of the event log record. The MFC application is unable to read the complete "Description" message string and displays only some part of it. However the Windows System Event Log Viewer reads and displays the complete "Description" message string correctly. I have ensured that my MFC application reads the entire "Description" message string by retrieving all the strings as provided by the "NumStrings" and "StringOffset" member variables of the EVENTLOGRECORD structure and merging all of them. Also as mentioned in MSDN my application loads the Source Name specific message library file (whose path is specified in the registry at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog\Application[SourceName]) that further contains additional message string information and merges it with the earlier read strings. I am still unable to get the entire "Description" message string. Please provide any help towards resolving the issue. Regards, Santosh.

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• asp.net mvc 2: SportsStore application: The current request for action is ambiguous

  - by dotnet-practitioner

  I am working on SportsStore example on chapter 4 from the following book and getting stuck... Pro Asp.net mvc framework I get the following error: The current request for action 'List' on controller type 'ProductsController' is ambiguous between the following action methods: System.Web.Mvc.ViewResult List() on type WebUI.Controllers.ProductsController System.Web.Mvc.ViewResult List(Int32) on type WebUI.Controllers.ProductsController .. My router code looks as follows: public static void RegisterRoutes(RouteCollection routes) { routes.MapRoute( null, // Route name "", // URL with parameters new { controller = "Products", action = "List", page=1 } ); routes.MapRoute( null, // Route name "Page{page}", // URL with parameters new { controller = "Products", action = "List" }, // Parameter defaults new { page = @"\d+" } ); } and controller code looks as follows: public ViewResult List() { return View(productsRepository.Products.ToList()); } public ViewResult List(int page) { return View(productsRepository.Products .Skip((page - 1) * PageSize) .Take(PageSize) .ToList()); } What am I missing? my url is as follows: http://localhost:1103/ or http://localhost:1103/Page1 or http://localhost:1103/Page2 thanks

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• How to handle concurrent web requests

  - by Rajan

  I am having a simple webservice running in my local system, hosted in IIS 6.0. This webservice is accessible from any other system (within LAN and Internet) and everything works fine as long as the number of systems accessing my webservice is very much limited. Whereas, if more number of users (say 500) are concurrently trying to access my webservice, an exception is thrown saying 'Server is busy'. When i browsed in net, i found that IIS can handle only 100-150 web requests concurrently. What should i do to make my webservice accessible from more than 500 users, concurrently? Thanks in advance. Rajan.

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• Determine file creation date in Java

  - by Todd

  Hello, There is another similar question to mine on StackOverflow (How to get creation date of a file in Java), but the answer isn't really there as the OP had a different need that could be solved via other mechanisms. I am trying to create a list of the files in a directory that can be sorted by age, hence the need for the file creation date. I haven't located any good way to do this after much trawling of the web. Is there a mechanism for getting file creation dates? Thanks, Todd BTW, currently on a Windows system, may need this to work on a Linux system as well. Also, I can't guarantee that a file naming convention would be followed where the creation date/time is embedded in the name.

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• Storing Shell Output

  - by Emil Radoncik

  Hello everybody, I am trying to read the output of a shell command into a string buffer, the reading and adding the values is ok except for the fact that the added values are every second line in the shell output. for example, I have 10 rows od shell output and this code only stores the 1, 3, 5, 7, 9, row . Can anyone point out why i am not able to catch every row with this code ??? any suggestion or idea is welcomed :) import java.io.*; public class Linux { public static void main(String args[]) { try { StringBuffer s = new StringBuffer(); Process p = Runtime.getRuntime().exec("cat /proc/cpuinfo"); BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream())); while (input.readLine() != null) { //System.out.println(line); s.append(input.readLine() + "\n"); } System.out.println(s.toString()); } catch (Exception err) { err.printStackTrace(); } } }

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• What encoding I should use in editor (NetBeans), if I were intend to print non-english character

  - by Yan Cheng CHEOK

  I try to set the encoding of my editor to UTF-16. (Java String store the data in UTF-16 internally, right?) And I type the following code package helloworld; /** * * @author yan-cheng.cheok */ public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("???"); System.out.println("\u6587\u4EF6\u79CD\u7C7B"); } } However, the output is not what I expected : ???? ????? I try to change the editor encoding format to UTF-8, it works this time! ??? ???? May I know why I need to change the editor encoding format to UTF-8 but not UTF-16? Isn't Java String store the data in UTF-16 internally?

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• .net List<string>.Remove bug Should I submit a MS Connect bug report on this?

  - by Dean Lunz

  So I was beating my head against a wall for a while before it dawned on me. I have some code that saves a list of names into a text file ala ... System.IO.File.WriteAllLines(dlg.FileName, this.characterNameMasterList.Distinct().ToArray()); The character names can contain special characters. These names come from the wow armory at www.wowarmory.com There are about 26000 names or so saved in the .txt file. The names get saved to the .txt file just fine. I wrote another application that reads these names from that .txt file using this code // download the names from the db var webNames = this.DownloadNames("character"); // filter names and get ones that need to be added to the db var localNames = new List<string>(System.IO.File.ReadAllLines(dlg.FileName)); foreach (var name in webNames) { if (localNames.Contains(name.Trim())) localNames.Remove(name); } return localNames; ... the code downloads a list of names from my website that are already in the db. Then reads the local .txt file and singles out every name that is not yet in the db so it can later add it. The names that get read from the .txt file also get read just fine with no problems. The problem comes in when removing names from the localNames list. localNames is a List type. As soon as localNames.Remove(name) gets called any names in the list that had special characters in them would get corrupted and be converted into ? characters. See for screen cap http://yfrog.com/12badcharsp So i tried doing it another way using ... // download the names from web that are already in the db var webNames = this.DownloadNames("character"); // filter names and get ones that need to be added to the db var localNames = new List<string>(System.IO.File.ReadAllLines(dlg.FileName)); int index = 0; while (index < webNames.Count) { var name = webNames[index++]; var pos = localNames.IndexOf(name.Trim()); if (pos != -1) localNames.RemoveAt(pos); } return localNames; .. But using localNames.RemoveAt also corrupts the items in the list converting special characters into ?. So is this a known bug with the List.remove methods? Does anyone know? Has anyone else had this problem? I also used .NET Reflector to disassemble/inspect the list.remove and list.RemoveAt code and it appear to be calling some external Copy function. Aside from the fact that this is prob not the best way to get a unique list of items from 2 lists am I missing something or should be aware of when using the List.Remove methods ? I am running windows 7 vs2010 and my app is set for .net 4 (no client profile )

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• No norwegian characters in LaTeX

  - by DreamCodeR

  Hi, I have translated a document from English to Norwegian in the LaTeX format, and while using norwegian special characters, I get an error using \usepackage[utf8x]{inputenc} to try and display the norwegian (scandinavian) special characters in PostScript/PDF/DVI format, saying Package utf8x Error: MalformedUTF-8sequence. So while that didn't work, I tried out another possible solution: \usepackage{ucs} \usepackage[norsk]babel And when I tried to save that in Emacs I get this message: These default coding systems were tried to encode text in the buffer `lol.tex': (utf-8-unix (905 . 4194277) (916 . 4194245) (945 . 4194278) (950 . 4194277) (954 . 4194296) (990 . 4194277) (1010 . 4194277) (1013 . 4194278) (1051 . 4194277) (1078 . 4194296) (1105 . 4194296)) However, each of them encountered characters it couldn't encode: utf-8-unix cannot encode these: \345 \305 \346 \345 \370 \345 \345 \346 \345 \370 ... Thanks to Emacs I have the possibility to check out the properties of those characters and the first one tells me: character: \345 (4194277, #o17777745, #x3fffe5) preferred charset: eight-bit (Raw bytes 128-255) code point: 0xE5 syntax: w which means: word buffer code: #xE5 file code: not encodable by coding system utf-8-unix display: not encodable for terminal Which doesn't tell me much. When I try to build this with texi2dvi --dvipdf filename.text I get a perfectly fine PDF, all without the special norwegian characters. When I am about to save Emacs also ask me: "Select coding system (default raw-text):" And I type in utf-8 to choose its coding system. I have also tried to choose default raw-text to see if I get some different result. But nothing. At last I tried \lstset{inputencoding=utf8x, extendedchars=\true} ... a code I came over while trying to google the solution to this problem. Which gives me this error: Undefined control sequence. So basically, I have tried every encoding option I have been able to find and nothing works. I am desperately trying to make this work since the norwegian translation must be published before the deadline. As an additional information I may add that I found out later on that I only had the en_US.UTF-8 in my locale, so I added nb_NO.UTF-8 and nb_NO.ISO-8859-15 and ran locale-gen + reboot without any changes. I hope I provided enough information to get some assistance, the characters in question is æ ø å.

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• imported function name is not visible in entities context

  - by ali moharrami

  hi I am working on silverlight application which uses EF. I am able to retrieve the data. But I want to execute a stored procedure which returns no value. I tried using Import function. and the function is created in DataModel.Designer.cs : public int ClearWorkflow(Nullable<global::System.Guid> processId) { ObjectParameter processIdParameter; if (processId.HasValue) { processIdParameter = new ObjectParameter("ProcessId", processId); } else { processIdParameter = new ObjectParameter("ProcessId",typeof(global::System.Guid)); } return base.ExecuteFunction("ClearWorkflow", processIdParameter); } But the function name is not visible in entities context while accessing in silverlight.

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• Oracle Data Pump import to a sql file error :ORA-31655 no data or metadata objects

  - by Francisco Quiñones

  Hello, I'm using Data Pump to export/import data, one requirement is to import data to a sql file. The OS is window. I made the follow export : expdp system/password directory=dpump_dir dumpfile=tablesdump.dmp content=DATA_ONLY tables=user.tablename and it works, I can see the file TABLESDUMP.DMP in the directory path. then when I tried to import it to a sql file: impdp system/password directory=dpump_dir dumpfile=tablesdump.dmp sqlfile=tables_export.sql the log show : ..... ORA-31655 no data or metadata objects selected for job ..... and the sql file is created empty in the directory path. I'm not DBA, I'm a Java developer , Can you help me? Thks

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• How To Aggregate API Data?

  - by Mindblip

  Hi, I have a system that connects to 2 popular APIs. I need to aggregate the data from each into a unified result that can then be paginated. The scope of the project means that the system could end up supporting 10's of APIs. Each API imposes a max limit of 50 results per request. What is the best way of aggregating this data so that it is reliable i.e ordered, no duplicates etc I am using CakePHP framework on a LAMP environment, however, I think this question relates to all programming languages. My approach so far is to query the search API of each provider and then populate a MySQL table. From this the results are ordered, paginated etc. However, my concern is performance: API communication, parsing, inserting and then reading all in one execution. Am I missing something, does anyone have any other ideas? I'm sure this is a common problem with many alternative solutions. Any help would be greatly appreciated. Thanks, Paul

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• Catch database exception in Kohana

  - by danilo

  I'm using Kohana 2. I would like to catch a database exception to prevent an error page when no connection to the server can be established. The error displayed is system/libraries/drivers/Database/Mysql.php [61]: mysql_connect() [function.mysql-connect]: Lost connection to MySQL server at 'reading initial communication packet', system error: 110 The database server is not reachable at all at this point. I'm doing this from a model. I tried both public function __construct() { // load database library into $this->db try { parent::__construct(); } catch (Exception $e) { die('Database error occured'); } } as well as try { $hoststatus = $this->db->query('SELECT x FROM y WHERE z;'); } catch (Exception $e) { die('Database error occured'); } ...but none of them seemed to work. It seems as if no exception gets passed on from the main model. Is there another way to catch the database error and use my own error handling?

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