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  • Avoid implicit conversion from date to timestamp for selects with Oracle 11g using Hibernate

    - by sapporo
    I'm using Hibernate 3.2.1 criteria queries to select rows from an Oracle 11g database, filtering by a timestamp field. The field in question is of type java.util.Date in Java, and DATE in Oracle. It turns out that the field gets mapped to java.sql.Timestamp, and Oracle converts all rows to TIMESTAMP before comparing to the passed in value, bypassing the index and thereby ruining performance. One solution would be to use Hibernate's sqlRestriction() along with Oracle's TO_DATE function. That would fix performance, but requires rewriting the application code (lots of queries). So is there a more elegant solution? Since Hibernate already does type mapping, could it be configured to do the right thing?

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  • Problem loading XMLDocument with non standard tags

    - by David Conde
    Hi, I have a code needed to load an XML document from a reader, something like this: private static XmlDocument GetDocumentStream(string xmlAddress) { var settings = new XmlReaderSettings(); settings.DtdProcessing = DtdProcessing.Ignore; settings.ValidationFlags = XmlSchemaValidationFlags.None; var reader = XmlReader.Create(xmlAddress, settings); document.Load(reader); return document; } But in my XML document, I have nodes like this one: <link rel="edit-media" title="Package" href="Packages(Id='51Degrees.mobi',Version='0.1.11.9')/$value" /> Is to my understanding that the node should be like <link rel="edit-media" title="Package"></link> But, I don't create the Xml document and I certainly don't want to change it, but when I try to load the XML document, the document.Load line throws an exception. To be more specific, the XML file is the RSS source for the nuPack project. Any ideas would be very appreaciated on how to be able to read this document properly.

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  • how to add a sidebar to a .net page based on a master page that doesnt have a sidebar.

    - by UXdesigner
    Hello, I have been told that I should add a sidebar to one page of this .net project, but the master page don't include a sidebar. How can I add a sidebar to one page only ? This is the code for the Master Template, can anyone suggest or help me out here? I'd buy a book and read more, but I have to do this for the next 12 hours. <%@ Master Language="C#" AutoEventWireup="true" CodeFile="Public.master.cs" Inherits="Public" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <%--<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> --%><html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <%--<link href="favicon.ico" rel="Shortcut Icon" type="image/x-icon" />--%> <link href="<%= Server.MapPath("~/css/main2.css") %>" rel="stylesheet" type="text/css" media="all" /> <link href="<%= Server.MapPath("~/css/dropdown.css") %>" media="screen" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/default.advanced.css") %>" media="screen" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/vlightbox.css") %>" rel="stylesheet" type="text/css" /> <link href="<%= Server.MapPath("~/css/visuallightbox.css") %>" rel="stylesheet" type="text/css" media="screen" /> <link href="<%= Server.MapPath("~/boxes.css") %>"rel="stylesheet" type="text/css" media="screen" /> <script src="<%= Server.MapPath("~/engine/js/jquery.min.js") %>" ype="text/javascript"></script> <script src="<%= Server.MapPath("~/js/cufon-yui.js") %>" type="text/javascript"></script> <script src="<%= Server.MapPath("~/js/AFB_400.font.js") %>" type="text/javascript"></script> <style type="text/css"> #vlightbox a#vlb { display:none } </style> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.5.3/jquery-ui.min.js" ></script> <script type="text/javascript"> Cufon.replace('h2'); </script> <script type="text/javascript"> Cufon.replace('h3'); </script> <script type="text/javascript"> Cufon.replace('h5'); </script> <!--[if IE 8]> <style type="text/css"> #footer {display:table;} </style> <![endif]--> <style> ul#nav { width:100%; height:36px; display:block; background-color:#000; background-repeat:repeat-x; } #wrapthatbanner {display:block; float:left; width:100%; height:529px; margin-left:-20px; margin-bottom:0px; } </style> <script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js?ver=1.3.2'></script> <script type="text/javascript"> $(document).ready(function() { $("#footer").stickyFooter(); }); // sticky footer plugin (function($) { var footer; $.fn.extend({ stickyFooter: function(options) { footer = this; positionFooter(); $(window) .scroll(positionFooter) .resize(positionFooter); function positionFooter() { var docHeight = $(document.body).height() - $("#sticky-footer-push").height(); if (docHeight < $(window).height()) { var diff = $(window).height() - docHeight; if (!$("#sticky-footer-push").length > 0) { $(footer).before('<div id="sticky-footer-push"></div>'); } $("#sticky-footer-push").height(diff); } } } }); })(jQuery); </script> </head> <body id="@@(categoria)@@"> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" AsyncPostBackTimeout="900"></asp:ScriptManager> <div id="container"> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <div id="header"> <div id="headerlink"> <table width="100%" border="0"> <tr> <td height="77px;" width="67%"> <asp:ImageButton PostBackUrl="~/index.aspx" ImageUrl="~/images/Titulos/5.png" runat="server" alt="" name="screen_logo" width="257" hspace="10" vspace="10" border="0" id="screen_logo" title="" /> </td> <td valign="top" align="right" width="33%"> <table> <tr> <td> <asp:Label ID="lblFullMessage" Visible="false" runat="server" Font-Size="X-Small" ForeColor="White" Text="Please enter the {0}, {1} and {2} characters from your password."></asp:Label> </td> </tr> <tr valign="middle"> <td> <img src="../images/login.jpg"</td> <td valign="top"> <asp:TextBox runat="server" Height="16px" Font-Size="Small" ID="txtLogin" Width="100px"></asp:TextBox> <asp:Button ID="btnLogin" Height="20px" Font-Size="X-Small" runat="server" Text="Go" OnClick="btnLogin_Click" /> </td> </tr> <tr> <td> <asp:Label ID="lblError" Visible="false" runat="server" Font-Size="X-Small" ForeColor="Red" Text="Error"></asp:Label> </td> </tr> </table> </td> </tr> </table> </div> </div> </ContentTemplate> </asp:UpdatePanel> <ul id="nav" class="dropdown dropdown-horizontal"> <li><asp:HyperLink NavigateUrl="~/index.aspx" CssClass="dir" runat="server" ID="lnk1">Home</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk3">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk4">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk7">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk5">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk2">link</asp:HyperLink></li> <li><asp:HyperLink NavigateUrl="~/PublicSide/link.aspx" CssClass="dir" runat="server" ID="lnk6">link</asp:HyperLink></li> </ul> <div id="wmfg"> </div> <div id="content"><asp:ContentPlaceHolder ID="Content1" runat="server"> </asp:ContentPlaceHolder></div> <div id="footer">Footer</div> </div> </form> </body> </html>

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  • sql query to incrementally modify where condition until result contains what is required

    - by iamrohitbanga
    I need an sql query to select some items from a table based on some condition which is based on a category field. As an example consider a list of people and I fetch the people from a particular age group from the database. I want to check if the result contains at least one result from each of a number of categories. If not I want to modify the age group by extending it and check the results again. This is repeated until I get an age group for which one result is present for each category. Right now i am doing this by analyzing the results and modifying the sql query. So a number of sql select queries are sent. What is the most efficient way of doing this? I am invoking the select queries from a java program using jdbc. I am using mysql database.

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  • Why is the user.dir system property working in Java?

    - by Geo
    Almost every article I read told me that you can't have chdir in Java. The accepted answer to this question says you can't do it in Java. However, here's some of the stuff I tried : geo@codebox:~$ java -version java version "1.6.0_14" Java(TM) SE Runtime Environment (build 1.6.0_14-b08) Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode, sharing) Here's a test class I'm using : import java.io.*; public class Ch { public static void main(String[] args) { System.out.println(new File(".").getAbsolutePath()); System.setProperty("user.dir","/media"); System.out.println(new File(".").getAbsolutePath()); } } geo@codebox:~$ pwd /home/geo geo@codebox:~$ java Ch /home/geo/. /media/. Please explain why this worked. Can I use this from now on and expect it to work the same way on all platforms?

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  • fql.multiquery new sdk

    - by Ronald Burris
    I cannot figure out what is wrong with this fql.multiquery and cannot seem to find any examples of the new sdk with fql.multiquery. Ultimately I want to get the page name and page id(s) of the visiting user pages which they both administrator and are fans of. $queries = '{ "page_admin_ids" : "SELECT page_id FROM page_admin WHERE uid = ' . $afid . ' LIMIT 5", "page_fan_ids" : "SELECT page_id FROM page_fan WHERE page_id IN (SELECT page_id FROM #page_admin_ids)", "page_name_and_id" : "SELECT name, page_id FROM page WHERE page_id IN (SELECT page_id FROM #page_fan_ids)" }'; $attachment = array("method"="fql.multiquery","query"=$queries,'access_token'=$access_token); $ret_code = $facebook-api($attachment); print_r($ret_code); die();

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  • printarea function not working

    - by daljeet
    I am trying to print a particular area on my webpage by using jQuery printarea() function. It doesn't work and returns an error. Error return (media.toLowerCase() == "" || media.toLowerCase() == "print") jQuery function printDiv() { $('#dvTokenArea').printArea(); }? <div id="dvTokenArea" runat="server"> <asp:Label ID="lblTokenNumber" runat="server" Text="Print ME !!!!!!!!!!!!"> </asp:Label> </div> <asp:Button ID="btnPrintToken" runat="server" Text="Print" OnClientClick="javascript:printDiv();" />

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  • The subscription model behind CSS selectors?

    - by Martin Kristiansen
    With CSS selectors a query string body > h1.span subscribes to a specific type of nodes in the tree. Does anyone know how this is done? Selectors for transformations, how does the browser select the result set? And is there a trick to making it efficient? I imagine there being some sort of hierarchical type-tree for the entire structure to which the nodes subscribe and which is what is used when doing the selector queries — but this is only a guess. Does anyone know the real answer? Or even more interesting, what would be the best way to do dynamic lookups on a tree based on jQuery/CSS search queries?

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  • Best practices for combining Lucene.NET and a relational database?

    - by FlySwat
    I'm working on a project where I will have a LOT of data, and it will be searchable by several forms that are very efficiently expressed as SQL Queries, but it also needs to be searched via natural language processing. My plan is to build an index using Lucene for this form of search. My question is that if I do this, and perform a search, Lucene will then return the ID's of matching documents in the index, I then have to lookup these entities from the relational database. This could be done in two ways (That I can think of so far): N amount of queries (Horrible) Pass all the ID's to a stored procedure at once (Perhaps as a comma delimited parameter). This has the downside of being limited to the max parameter size, and the slow performance of a UDF to split the string into a temporary table. I'm almost tempted to mirror everything into lucenes index, so that I can periodicly generate the index from the backing store, but only need to access it for the frontend. Advice?

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  • Help to translate SQL query to Relational Algebra

    - by Mestika
    Hi everyone, I'm having some difficulties with translating some queries to Relational Algebra. I've a great book about Database Design and here is a chapter about Relational Algebra but I still seem to have some trouble creating the right one: Thoes queries I've most difficuelt with is these: SELECT COUNT( cs.student_id ) AS counter FROM course c, course_student cs WHERE c.id = cs.course_id AND c.course_name = 'Introduction to Database Design' SELECT COUNT( cs.student_id ) FROM Course c INNER JOIN course_student cs ON c.id = cs.course_id WHERE c.course_name = 'Introduction to Database Design' and SELECT COUNT( * ) FROM student JOIN grade ON student.f_name = "Andreas" AND student.l_name = "Pedersen" AND student.id = grade.student_id I know the notation can be a bit hard to paste into HTML forum, but maybe just use some common name or the Greek name. Thanks in advance Mestika

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  • (Android SDk 2.1) Getting error when I use setAudioSource and setVideoSource

    - by Rainfer
    I got the follow error when I run setAudioSource and setVideoSource. 03-16 10:26:25.302: ERROR/audio_input(52): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value 03-16 10:26:25.302: ERROR/audio_input(52): VerifyAndSetParameter failed 03-16 10:26:25.302: ERROR/CameraInput(52): Unsupported parameter(x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value) 03-16 10:26:25.302: ERROR/CameraInput(52): VerifiyAndSetParameter failed on parameter #0 This error happen on both emulator and the device. (I am using Google nexus one) I have set the CAMERA and RECORD_AUDIO user permission already. I spent many days but I still cannot figure out what is the cause of this runtime error.

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  • Git & Web-design: handling multiple customized templates

    - by o_O Tync
    I'm developing a CMS (with Django, but that doesn't matter) and have chosen GIT. Installations will vary in: Configs Database contents Media Templates First 3 are not a problem with git: we simply don't need these :) While developing, I have 1 default template with related media. Later, each customer will receive his own design based on default templates (some slight customization). I'm not going to support each of the custom templates as I introduce new features. Modularity helps with this but is not a 100% solution. Do you have any experience to share?

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  • Stack Overflow problem in a recursive program in C

    - by Adi
    Hi all, I am getting a stack overflow in one of the recursive functions i am running.. Here is the code.. void* buddyMalloc(int req_size) { // Do something here return buddy_findout(original_index,req_size); // This is the recursive call } void *buddy_findout(int current_index,int req_size) { char *selected = NULL; if(front!=NULL) { if(current_index==original_index) { // Do something here return selected; } else { // Do Something here return buddy_findout(current_index+1,req_size); } } else { return buddy_findout(current_index-1,req_size); } } Consider the initial value of index to be 4. and it first do index-1 till it reaches 0 index. and then it comes back to index 4 by incrementing..This is wht i want to implement. But it gives a stack overflow with memory map in the command prompt : Here is the output from my shell : * glibc detected * ./473_mem: free(): invalid pointer: 0x00c274c0 * ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6[0xb50ff1] /lib/tls/i686/cmov/libc.so.6[0xb526f2] /lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xb557cd] ./473_mem[0x8048b44] ./473_mem[0x8048b74] ./473_mem[0x8048b74] ./473_mem[0x8048944] ./473_mem[0x8048c87] ./473_mem[0x8048d31] ./473_mem[0x8048f79] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xafcb56] ./473_mem[0x8048671] ======= Memory map: ======== 0017c000-00198000 r-xp 00000000 08:01 5224 /lib/libgcc_s.so.1 00198000-00199000 r--p 0001b000 08:01 5224 /lib/libgcc_s.so.1 00199000-0019a000 rw-p 0001c000 08:01 5224 /lib/libgcc_s.so.1 00260000-00284000 r-xp 00000000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 00284000-00285000 r--p 00023000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 00285000-00286000 rw-p 00024000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 006cd000-006e8000 r-xp 00000000 08:01 6662 /lib/ld-2.10.1.so 006e8000-006e9000 r--p 0001a000 08:01 6662 /lib/ld-2.10.1.so 006e9000-006ea000 rw-p 0001b000 08:01 6662 /lib/ld-2.10.1.so 00aa9000-00aaa000 r-xp 00000000 00:00 0 [vdso] 00ae6000-00c24000 r-xp 00000000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c24000-00c25000 ---p 0013e000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c25000-00c27000 r--p 0013e000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c27000-00c28000 rw-p 00140000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c28000-00c2b000 rw-p 00000000 00:00 0 08048000-0804a000 r-xp 00000000 00:14 2176 /media/windows-share/OS/Project2/473_mem 0804a000-0804b000 r--p 00001000 00:14 2176 /media/windows-share/OS/Project2/473_mem 0804b000-0804c000 rw-p 00002000 00:14 2176 /media/windows-share/OS/Project2/473_mem 08483000-084a4000 rw-p 00000000 00:00 0 [heap] b7600000-b7621000 rw-p 00000000 00:00 0 b7621000-b7700000 ---p 00000000 00:00 0 b7716000-b7819000 rw-p 00000000 00:00 0 b7827000-b782a000 rw-p 00000000 00:00 0 bfb96000-bfbab000 rw-p 00000000 00:00 0 [stack] Aborted Thanks in advance adi

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  • Flash AS3 undefined property MouseEvent in document class

    - by Lee
    Hi guys, this is my first time trying to use document classes in AS3 and im struggling. I am trying to add event listeners to a 2 levels deep movie clip, waiting for a click however i am getting the following error. ERROR: Access of undefined property MouseEvent package { import flash.display.MovieClip; import flash.media.Sound; import flash.media.SoundChannel; public class game extends MovieClip { public var snd_state = true; public function game() { ui_setup(); } public function ui_setup() { ui_mc.toggleMute_mc.addEventListener(MouseEvent.CLICK, snd_toggle); } public function snd_toggle(MouseEvent) { // 0 = No Sound, 1 = Full Sound trace("Toggle"); } } }

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  • Problem using SQLDMO/Vb6 against SQL Server 2008

    - by E.J. Brennan
    I have a client, that uses SQLDMO for a portion of a custom application that was written against SQL Server 2000, and they recently upgraded to SQL Server 2008. The majority of the app still runs fine (doesn't use SQLDMO), but the admin functions which rely on SQLDMO stopped working. I installed the SQL2005 backward compatibility pack, and now SQLDMO partially works, i.e. I can run "select" type queries, but any "Update" queries fail with the error message: to connect to the server you must use SQL Server management studio or sql server management objects (SMO) Any thoughts? Should the backward compatibility pack give me ALL the functionality back, or is this a known issue? BTW: I realize SQLDMO has been deprecated and will go away next release, none-the-less I need to do what I can to solve the problem at hand.

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  • Convert a Mysql database from latin to UTF-8

    - by Matthieu
    I am converting a website from ISO to UTF-8, so I need to convert the Mysql database too. On internet, I read various solutions, I don't know wich one to choose. Do I really need to convert my varchar columns to binary, then to utf8 like that : ALTER TABLE t MODIFY col BINARY(150); ALTER TABLE t MODIFY col CHAR(150) CHARACTER SET utf8; This is long to do that for each column, of each table, of each database. I have 10 database, wich 20 tables each, wich around 2 - 3 varchar colums (2 queries each column), this gives me around 1000 queries to write ! How come ? How to do ?

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  • How to eager load sibling data using LINQ to SQL?

    - by Scott
    The goal is to issue the fewest queries to SQL Server using LINQ to SQL without using anonymous types. The return type for the method will need to be IList<Child1>. The relationships are as follows: Parent Child1 Child2 Grandchild1 Parent Child1 is a one-to-many relationship Child1 Grandchild1 is a one-to-n relationship (where n is zero to infinity) Parent Child2 is a one-to-n relationship (where n is zero to infinity) I am able to eager load the Parent, Child1 and Grandchild1 data resulting in one query to SQL Server. This query with load options eager loads all of the data, except the sibling data (Child2): DataLoadOptions loadOptions = new DataLoadOptions(); loadOptions.LoadWith<Child1>(o => o.GrandChild1List); loadOptions.LoadWith<Child1>(o => o.Parent); dataContext.LoadOptions = loadOptions; IQueryable<Child1> children = from child in dataContext.Child1 select child; I need to load the sibling data as well. One approach I have tried is splitting the query into two LINQ to SQL queries and merging the result sets together (not pretty), however upon accessing the sibling data it is lazy loaded anyway. Adding the sibling load option will issue a query to SQL Server for each Grandchild1 and Child2 record (which is exactly what I am trying to avoid): DataLoadOptions loadOptions = new DataLoadOptions(); loadOptions.LoadWith<Child1>(o => o.GrandChild1List); loadOptions.LoadWith<Child1>(o => o.Parent); loadOptions.LoadWith<Parent>(o => o.Child2List); dataContext.LoadOptions = loadOptions; IQueryable<Child1> children = from child in dataContext.Child1 select child; exec sp_executesql N'SELECT * FROM [dbo].[Child2] AS [t0] WHERE [t0].[ForeignKeyToParent] = @p0',N'@p0 int',@p0=1 exec sp_executesql N'SELECT * FROM [dbo].[Child2] AS [t0] WHERE [t0].[ForeignKeyToParent] = @p0',N'@p0 int',@p0=2 exec sp_executesql N'SELECT * FROM [dbo].[Child2] AS [t0] WHERE [t0].[ForeignKeyToParent] = @p0',N'@p0 int',@p0=3 exec sp_executesql N'SELECT * FROM [dbo].[Child2] AS [t0] WHERE [t0].[ForeignKeyToParent] = @p0',N'@p0 int',@p0=4 I've also written LINQ to SQL queries to join in all of the data in hopes that it would eager load the data, however when the LINQ to SQL EntitySet of Child2 or Grandchild1 are accessed it lazy loads the data. The reason for returning the IList<Child1> is to hydrate business objects. My thoughts are I am either: Approaching this problem the wrong way. Have the option of calling a stored procedure? My organization should not be using LINQ to SQL as an ORM? Any help is greatly appreciated. Thank you, -Scott

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  • How to prevent HTTP 304 in Django test server

    - by Augusto Men
    I have a couple of projects in Django and alternate between one and another every now and then. All of them have a /media/ path, which is served by django.views.static.serve, and they all have a /media/css/base.css file. The problem is, whenever I run one project, the requests to base.css return an HTTP 304 (not modified), probably because the timestamp hasn't changed. But when I run the other project, the same 304 is returned, making the browser use the file cached by the previous project (and therefore, using the wrong stylesheet). Just for the record, here are the middleware classes: MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.transaction.TransactionMiddleware', ) I always use the default address http://localhost:8000. Is there another solution (other than using different ports - 8001, 8002, etc.)?

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  • Authentication on odata service

    - by Toad
    I want to add some authentication to my odata service. Depending on the user calling i want to: filter rows and/or remove columns. I read in scott hanselmans fine blogpost on odata ( http://www.hanselman.com/blog/CreatingAnODataAPIForStackOverflowIncludingXMLAndJSONIn30Minutes.aspx )that it is possible to intercept the incoming queries. If this works i could add some extra filtering. How would this intercepting and altering queries work exactly? I can not find any examples of where and how to do this. (i'm using entitie framework and wcf dataservices (just like scotts example blog)

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  • Linq Query Help Needed

    - by Randy Minder
    Say I have the following LINQ queries: var source = from workflow in sourceWorkflowList select new { SubID = workflow.SubID, ReadTime = workflow.ReadTime, ProcessID = workflow.ProcessID, LineID = workflow.LineID }; var target = from workflow in targetWorkflowList select new { SubID = workflow.SubID, ReadTime = workflow.ReadTime, ProcessID = workflow.ProcessID, LineID = workflow.LineID }; var difference = source.Except(target); sourceWorkflowList and targetWorkflowList have the exact same column definitions. But they both contain more columns of data than what is shown in the queries above. Those are just the columns needed for this particular issue. difference contains all rows in sourceWorkflowList that are not contained in targetWorkflowList Now what I would like to do is to remove all rows from sourceWorkflowList that do not exist in difference. Could someone show me a query that would do this? Thanks very much - Randy

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  • The advantages and disadvantages of using ORM

    - by JHarley1
    Good Morning, I would like to discuss today the advantages and disadvantages of using ORM (such as ADO.NET). Advantages: Speeds-up Development - eliminates the need for repetitive SQL code. Reduces Development Time. Reduces Development Costs. Overcomes vendor specific SQL differences - the ORM knows how to write vendor specific SQL so you don't have to. Disadvantages: Loss in developer productivity whilst they learn to program with ORM. Developers loose understanding of what the code is actually doing - the developer is more in control using SQL. ORM has a tendency to be slow. ORM fail to compete against SQL queries for complex queries. In summary, I believe that the disadvantages of using an ORM (mainly the reduced time taken to perform repetitive tasks) is far outweighed by the disadvantages of ORM e.g. its difficulty to get to grips with. Can people point out were I am going wrong and suggest any further advantages/disadvantages. Many Thanks, J

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