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  • Jquery alternate row color doesn't seem to work after hover function...

    - by Pandiya Chendur
    I use the following jquery statements, $(".resultsdiv:odd").css("background-color", "#fff"); $(".resultsdiv:even").css("background-color", "#EFF1F1"); $('.resultsdiv').hover(function() { $(this).css('background-color', '#f4f2f2'); }, function() { $(this).css('background-color', '#fff'); }); Alternate seems to be ok initially but after hover over a div element it doesn't work ... Any suggestion...

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  • restful way for deleting a bunch of items

    - by keisimone
    In wiki article for REST it is indicated that if you use http://example.com/resources DELETE, that means you are deleting the entire collection. If you use http://example.com/resources/7HOU57Y DELETE, that means you are deleting that element. I am doing a WEBSITE, note NOT WEB SERVICE. I have a list that has 1 checkbox for each item on the list. Once i select multiple items for deletion, i will allow users to press a button called DELETE SELECTION. If user presses the button, a js dialog box will popup asking user to confirm the deletion. if user confirms, all the items are deleted. So how should i cater for deleting multiple items in a RESTFUL way? NOTE, currently for DELETE in a webpage, what i do is i use FORM tag with POST as action but include a _method with the value DELETE since this is what was indicated by others in SO on how to do RESTful delete for webpage.

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  • DataTable Delete Row and AcceptChanges

    - by Pang
    DataTable DT num type name =================================== 001 A Peter 002 A Sam 003 B John public static void fun1(ref DataTable DT, String TargetType) { for (int i = 0; i < DT.Rows.Count; i++) { string type = DT.Rows[i]["type"]; if (type == TargetType) { /**Do Something**/ DT.Rows[i].Delete(); } } DT.AcceptChanges(); } My function get specific data rows in datatable according to the TargetType and use their info to do something. After the datarow is read (match the target type), it will be deleted. However, the row is deleted immediately after .Delete() execute, so the location of the next row (by i) is incorrect. For example, if TargetType is A. When i=0, the "Peter" row is deleted after .Delete executed. Then when i=1, I suppose it will locate the "Sam" row but it actually located "John" row because "Peter" row is deleted. Is there any problem in my codes?

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  • A better way to delete a list of elements from multiple tables

    - by manyxcxi
    I know this looks like a 'please write the code' request, but some basic pointer/principles for doing this the right way should be enough to get me going. I have the following stored procedure: CREATE PROCEDURE `TAA`.`runClean` (IN idlist varchar(1000)) BEGIN DECLARE EXIT HANDLER FOR NOT FOUND ROLLBACK; DECLARE EXIT HANDLER FOR SQLEXCEPTION ROLLBACK; DECLARE EXIT HANDLER FOR SQLWARNING ROLLBACK; START TRANSACTION; DELETE FROM RunningReports WHERE run_id IN (idlist); DELETE FROM TMD_INDATA_INVOICE WHERE run_id IN (idlist); DELETE FROM TMD_INDATA_LINE WHERE run_id IN (idlist); DELETE FROM TMD_OUTDATA_INVOICE WHERE run_id IN (idlist); DELETE FROM TMD_OUTDATA_LINE WHERE run_id IN (idlist); DELETE FROM TMD_TEST WHERE run_id IN (idlist); DELETE FROM RunHistory WHERE id IN (idlist); COMMIT; END $$ It is called by a PHP script to clean out old run history. It is not particularly efficient as you can see and I would like to speed it up. The PHP script gathers the ids to remove from the tables with the following query: $query = "SELECT id, stop_time FROM RunHistory WHERE config_id = $configId AND save = 0 AND NOT(stop_time IS NULL) ORDER BY stop_time"; It keeps the last five run entries and deletes all the rest. So using this query to bring back all the IDs, it determines which ones to delete and keeps the 'newest' five. After gathering the IDs it sends them to the stored procedure to remove them from the associated tables. I'm not very good with SQL, but I ASSUME that using an IN statement and not joining these tables together is probably the least efficient way I can do this, but I don't know enough to ask anything but "how do I do this better?" If possible, I would like to do this all in my stored procedure using a query to gather all the IDs except for the five 'newest', then delete them. Another twist, run entries can be marked save (save = 1) and should not be deleted. The RunHistory table looks like this: CREATE TABLE `TAA`.`RunHistory` ( `id` int(11) NOT NULL auto_increment, `start_time` datetime default NULL, `stop_time` datetime default NULL, `config_id` int(11) NOT NULL, [...] `save` tinyint(1) NOT NULL default '0', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;

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  • emacs delete directory recursively?

    - by Stephen
    I was searching through for a way to copy/delete directory trees... dired seems to have dired-copy-file-recursive (though sans documentation) and a search on 'recursive' also returns: tramp-handle-dired-recursive-delete-directory is a compiled Lisp function in `tramp.el'. (tramp-handle-dired-recursive-delete-directory FILENAME) Recursively delete the directory given. This is like `dired-recursive-delete-directory' for Tramp files. But I can't find dired-recursive-delete-directory anywhere! Anyone know what's going on? Thanks ~

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  • Excel VBA: can delete validation but not add new one

    - by user1882965
    My code is as follows If Cells(Target.Row, 2) = "" And (Cells(Target.Row, 3) = "" Or Cells(Target.Row, 3) = "") Then Sheets("MySheet").Activate Cells(Target.Row, 3).Activate ActiveCell.Validation.Delete If (Cells(Target.Row, 2) = "Type A") Then ActiveCell.Validation.Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:=xlBetween, Formula1:="=AvailableVersions" ElseIf (Cells(Target.Row, 2) = "Type B") Then ActiveCell.Validation.Delete Else ActiveCell.Validation.Add Type:=xlValidateWholeNumber, AlertStyle:=xlValidAlertInformation, Formula1:="0", Formula2:="9999999" End If End If So the issue I am having comes whenever I reach ActiveCell.Validation.Add Run Time Error '1004': Application-defined or object-defined error Not a very helpful error, and also this occurs with both number and list validation type, so I am sure it is not an issue with the list itself which has workbook level scope anyway. It never occurs on ActiveCell.Validation.Delete which I find weird? I have been all over google trying to find a solution, and most suggest that it is caused by running dynamic validation code from a button which hogs focus despite the Activate call, but I am running on sheet change event rather than on button press so I don't think this is my issue - any ideas? I've wasted basically a whole day on this! :(

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  • Hi i am creating a php calendar i have a Problem in that

    - by udaya
    Hi i am creating a calendar i which i filled the year and date like this <<<<< Year <<<<< month by clicking on the arrow marks the year and month can be increased and decreased now i have to fill the dates for the year and month selected I calculated the first day of month and last date of the month The dates must be start filling from the first day Say if the first day is thursday the date 1 must be on thursday and the next days must follow that till the last date These are my functions in my controller " function phpcal() { $month=04; $day=01; $year=2010; echo date("D", mktime(0,0,0,$month,$day,$year)); //here i am calculating the first day of the month echo '<br>lastdate'.date("t", strtotime($year . "-" . $month . "-01"));'' here i am calculating the lasdt date of the month //echo '<br>'.$date_end = $this->lastOfMonth(); $this->load->view('phpcal'); } function firstOfMonth($m1,$y1) { return date("m/d/Y", strtotime($m1.'/01/'.$y1.' 00:00:00')); } function lastOfMonth() { return date("m/d/Y", strtotime('-1 second',strtotime('+1 month',strtotime(date('m').'/01/'.date('Y').' 00:00:00')))); } function phpcalview() { $year = $this->input->post('yearvv'); $data['year'] = $this->adminmodel->selectyear(); $data['date'] = $this->adminmodel->selectmonth(); //print_r($data['date'] ); $this->load->view('phpcal',$data); } This is my view page <table cellpadding="2" cellspacing="0" border="1" bgcolor="#CCFFCC" align="center" class="table_Style_Border"> <? if(isset($date)) { foreach($date as $row) {?> <tr> <td><?= $row['dbDate1'];?></td> <td><?= $row['dbDate2'];?></td> <td><?= $row['dbDate3'];?></td> <td><?= $row['dbDate4'];?></td> <td><?= $row['dbDate5'];?></td> <td><?= $row['dbDate6'];?></td> <td><?= $row['dbDate7'];?></td> </tr> <tr bgcolor="#FFFFFF"> <td><?= $row['dbDate8'];?></td> <td><?= $row['dbDate9'];?></td> <td><?= $row['dbDate10'];?></td> <td><?= $row['dbDate11'];?></td> <td><?= $row['dbDate12'];?></td> <td><?= $row['dbDate13'];?></td> <td><?= $row['dbDate14'];?></td> </tr> <tr> <td><?= $row['dbDate15'];?></td> <td><?= $row['dbDate16'];?></td> <td><?= $row['dbDate17'];?></td> <td><?= $row['dbDate18'];?></td> <td><?= $row['dbDate19'];?></td> <td><?= $row['dbDate20'];?></td> <td><?= $row['dbDate21'];?></td> </tr> <tr bgcolor="#FFFFFF"> <td><?= $row['dbDate22'];?></td> <td><?= $row['dbDate23'];?></td> <td><?= $row['dbDate24'];?></td> <td><?= $row['dbDate25'];?></td> <td><?= $row['dbDate26'];?></td> <td><?= $row['dbDate27'];?></td> <td><?= $row['dbDate28'];?></td> </tr> <tr> <td><?= $row['dbDate29'];?></td> <td><?= $row['dbDate30'];?></td> <td><?= $row['dbDate31'];?></td> <td><?= $row['dbDate1'];?></td> <td><?= $row['dbDate1'];?></td> <td><?= $row['dbDate1'];?></td> <td><?= $row['dbDate1'];?></td> </tr> </tr> <? }} ?> </table> How can i insert the dates starting from the day i have calculated in the function phpcal

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  • Put specific tds from a table row into edit using jQuery (then update w/ ajax)

    - by bbqsauced
    I'm somewhat new to jQuery, so I could use some help here. This is my issue: I have a php script outputting a dynamic table. Each row has an "edit" button, plus some other fields. Only 3 of those need to be turned into an input box. The edit button should only put that specific row into "edit mode." I got as far as assigning each row a unique class by adding a number to the end of it. I have been able to use jQuery to change all of the rows into edit mode, but I need it to be specific to a row. An example row would have classes like name0, price0, and desc0. The next row would go on to classes name1, price1, and desc1 (for the fields that need changed). How can I reference these values and pass them to jQuery so it processes an event on just those elements?

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  • How to delete a customized cell in UITableView ?

    - by srikanth rongali
    I have UITableView. I customized the cell height (increased). I have 4 labels(UILabel) and 1 image(UIImage) and 3 buttons (UIButton). one of the button is delete button. By touching the cell or button(play button) on the image a video is loaded and played. I need to delete the cell by touching delete button. If I touched the delete button the corresponding video is deleted from library . But, how to delete the cell and all remaining data in it ? I am not able to delete the cells or the data in the cells. How to do it ? Thank you.

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  • How can I change column fore color in DataGridview as per condition?

    - by Ashish
    hi, i have one table like employee and one of its row is 'status' if status value is 'approve' then i want to show that row in green color and else i want to show it in red color. i have tried following but not working if (e.Row.RowType == DataControlRowType.Header) { string status = DataBinder.Eval(e.Row.DataItem, "IsApprove").ToString(); if (status == "pending") { e.Row.ForeColor = System.Drawing.Color.Red; // Change the row's Text color } } ALSO THIS ONE private void gvleavedetail_cellformatting(object sender, datagridviewcellformattingeventargs e) { // if the column is the artist column, check the // value. if (this.gvleavedetail.columns[e.columnindex].name == "artist") { if (e.value != null) { // check for the string "pink" in the cell. string stringvalue = (string)e.value; stringvalue = stringvalue.tolower(); if (stringvalue == "high") { e.cellstyle.backcolor = color.pink; } } } But in this case i'm getting error for datagridviewcellformattingeventargs I'm using VS2010

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  • Why won't JPA delete owned entities when the owner entity loses the reference to them?

    - by Nick
    Hi! I've got a JPA entity "Request", that owns a List of Answers (also JPA entities). Here's how it's defined in Request.java: @OneToMany(cascade= CascadeType.ALL, mappedBy="request") private List<Answer> answerList; And in Answer.java: @JoinColumn(name = "request", referencedColumnName="id") @ManyToOne(optional = false) private Request request; In the course of program execution, the Request's List of Answers may have Answers added or removed from it, or the actual List object may be replaced. My problem is thus: when I merge a Request to the database, the Answer objects that used to be in the List are kept in the database -- that is, Answer objects that the Request no longer holds a reference to (indirectly, via a List) are not deleted. This is not the behaviour I desire, as if I merge a Request to the database, and then fetch it again, its Answers List may not be the same. Am I making some programming mistake? Is there an annotaion or setting that will ensure that the Answers in the database are exactly the Answers in the Request's List? A solution is to keep references to the original Answers List and then use the EntityManager to remove each old Answer before merging the Request, but it seems like there should be a cleaner way. Thank you!

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  • Drupal - db_fetch_array returns NULL for every row

    - by darudude
    I'm using Drupal's db_fetch_array to fetch rows from my db_query. However, every row returned is equal to NULL. Typing the query into PHP myadmin works, so I have no idea whats going on. db_num_rows returns the number of rows as well. Here is the code: if(count($rebuild_ids)) { $ids=implode(",",$rebuild_ids); $type_stmt = "SELECT * from {" . ItemType::$type_table_name . "} where id IN ($ids)"; $new_items=db_query($type_stmt); if(!$new_items || db_num_rows($new_items) == 0) { return; } while($row = db_fetch_array($new_items)); { if ($row!=NULL) { echo "I work!" $game_items[] = $row['id']; ItemInstance::$nid_to_item_type_code[$row['nid']] = $row['id']; } } } However, it never gets into the third if statement (i.e. never echos "I work!") Any ideas?

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  • I can't delete record in Codeigniter

    - by jomblo
    I'm learning CRUD in codeigniter. I have table name "posting" and the coloumns are like this (id, title, post). I successed to create a new post (both insert into database and display in the view). But I have problem when I delete my post in the front-end. Here is my code: Model Class Post_Model extends CI_Model{ function index(){ //Here is my homepage code } function delete_post($id) { $this->db->where('id', $id); $this->db->delete('posting'); } } Controller Class Post extends CI_Controller{ function delete() { $this->load->model('Post_Model'); $this->Post_Model->delete_post("id"); redirect('Post/index/', 'refresh'); } } After click "delete" in the homepage, there was nothing happens. While I'm looking into my database, my records still available. Note: (1) to delete record, I'm following the codeigniter manual / user guide, (2) I found a message error (Undefined variable: id) after hiting the "delete" button in the front-end Any help or suggestion, please

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  • Keep row of datagridview clicked by user selected

    - by user367509
    Hi All, I need the snipped code in C# to mantain selected the row from a datagridview after that row is double clicked. Right now I'm displaying data from a dataset and the selection mode is FullRowSelect. Any way to set this? There are two scenarios to deal with: 1) Everytime the timer ticks the selected row always go to the first row of datagridview. 2) Once a row is clicked, it is selected but after the timer ticks the selected row goes to the first one. Thanks for your help! A newbie programmer

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  • How do I delete the first line in a file?

    - by Soop
    I can't search for a particular string, since they're all very similar, but I'd like something simple to chop out the first 4 lines in a file. They're all variable length too. I've had a a think about perl, and it all seems harder than I thought, but I'd like to do it in Perl, AWK or a shell command if possible. Does anybody have a simple way of doing this?

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  • dependent: :destroy is not deleting dependencies from views

    - by jxdx
    Projects have many rooms. When I delete a project from the view, the associated rooms are not deleted. Rooms also have many products which should also be deleted when a project is deleted. Project class class Project < ActiveRecord::Base belongs_to :user has_many :rooms, dependent: :destroy has_many :products, through: :rooms end Projects Controller class ProjectsController < ApplicationController def destroy @project = current_user.projects.find(params[:id]) if @project.delete redirect_to user_projects_path(@project.user) end end end Rooms Controller class RoomsController < ApplicationController def destroy @room = Room.find(params[:id]) if @room.delete redirect_to root_path end end The delete link in the projects show view. = link_to "Delete", project_room_path(room.project, room), method: :delete, data: { confirm: "Are you sure?" }, title: room.title, class: "btn btn-danger"

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  • Wipe, Delete, and Securely Destroy Your Hard Drive’s Data the Easy Way

    - by The Geek
    Giving a computer to somebody else? Maybe you’re putting it out on Craigslist to sell to a stranger—either way, you’ll want to make sure that your drive is completely wiped, scrubbed, and clean of any personal data. Here’s the easy way to do it. If you only have access to an Ubuntu Live CD or thumb drive, you can actually use that instead if you prefer, and we’ve got you covered with a full guide to securely wiping your PC’s hard drive. Otherwise, keep reading. Wipe the Drive with DBAN Darik’s Boot and Nuke CD is the easiest way to permanently and totally destroy every bit of personal information on that drive—nobody is going to recover a thing once this is done. The first thing you’ll need to do is download a copy of the ISO image, and then burn it to a blank CD with something really useful like Imgburn. Just choose Burn image to Disc at the start screen, select the little file icon, grab the downloaded ISO, and then go. If you need a little more help, we’ve got you covered with a beginner’s guide to burning an ISO image. Once you’re done, stick the disc into the drive, start the PC up, and then once you boot to the DBAN prompt you’ll see a menu. You can pretty much ignore everything on here, and just type… autonuke And there you are, your disk is now being securely wiped. Once it’s all done, you can remove the CD, and then either pack the PC up to sell, or re-install Windows on there if you feel like it. More Advanced Method If you’re really paranoid, want to run a different type of wipe, or just like fiddling with the options, you can choose F3 or hit Enter at the prompt to head to the advanced selection screen. Here you can choose exactly which drive to wipe, or hit the M key to change the method. You’ll be able to choose between a bunch of different wipe options. The Quick Erase is all you really need though.   So there you are, easy PC wiping in one package. What about you? Do you make sure to wipe your old PCs before giving them away? Personally I’ve always just yanked out the hard drives before I got rid of an old PC, but that’s just me. Download DBAN from dban.org Similar Articles Productive Geek Tips Use an Ubuntu Live CD to Securely Wipe Your PC’s Hard DriveHow to Dispose of Old Computers ResponsiblyHow To Delete a VHD in Windows 7Speed up External USB Hard Drives in Windows VistaSpeed Up SATA Hard Drives in Windows Vista TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Follow Finder Finds You Twitter Users To Follow Combine MP3 Files Easily QuicklyCode Provides Cheatsheets & Other Programming Stuff Download Free MP3s from Amazon Awe inspiring, inter-galactic theme (Win 7) Case Study – How to Optimize Popular Wordpress Sites

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  • Render MVCContrib Grid with No Header Row

    - by Ben Griswold
    The MVCContrib Grid allows for the easy construction of HTML tables for displaying data from a collection of Model objects. I add this component to all of my ASP.NET MVC projects.  If you aren’t familiar with what the grid has to offer, it’s worth the looking into. What you may notice in the busy example below is the fact that I render my column headers independent of the grid contents.  This allows me to keep my headers fixed while the user searches through the table content which is displayed in a scrollable div*.  Thus, I needed a way to render my grid without headers. That’s where Grid Renderers come into play.  <table border="0" cellspacing="0" cellpadding="0" class="projectHeaderTable">     <tr>         <td class="memberTableMemberHeader">             <%= Html.GridColumnHeader("Member", "Index", "MemberFullName")%>              </td>         <td class="memberTableRoleHeader">             <%= Html.GridColumnHeader("Role", "Index", "ProjectRoleTypeName")%>              </td>                <td class="memberTableActionHeader">             Action         </td>     </tr> </table> <div class="scrollContentWrapper"> <% Html.Grid(Model)     .Columns(column =>             {                 column.For(c => c.MemberFullName).Attributes(@class => "memberTableMemberCol");                 column.For(c => c.ProjectRoleTypeName).Attributes(@class => "memberTableRoleCol");                 column.For(x => Html.ActionLink("View", "Details", new { Id = x.ProjectMemberId }) + " | " +                                 Html.ActionLink("Edit", "Edit", new { Id = x.ProjectMemberId }) + " | " +                                 Html.ActionLink("Remove", "Delete", new { Id = x.ProjectMemberId }))                     .Attributes(@class => "memberTableActionCol").DoNotEncode();             })     .Empty("There are no members associated with this project.")     .Attributes(@class => "lbContent")     .RenderUsing(new GridNoHeaderRenderer<ProjectMemberDetailsViewModel>())     .Render(); %> </div> <div class="scrollContentBottom">     <!– –> </div> <%=Html.Pager(Model) %> Maybe you noticed the reference to the GridNoHeaderRenderer class above?  Yep, rendering the grid with no header is straightforward.   public class GridNoHeaderRenderer<T> :     HtmlTableGridRenderer<T> where T: class {     protected override bool RenderHeader()     {         // Explicitly returning true would suppress the header         // just fine, however, Render() will always assume that         // items exist in collection and RenderEmpty() will         // never be called.           // In other words, return ShouldRenderHeader() if you         // want to maintain the Empty text when no items exist.         return ShouldRenderHeader();     } } Well, if you read through the comments, there is one catch.  You might be tempted to have the RenderHeader method always return true.  This would work just fine but you should return the result of ShouldRenderHeader() instead so the Empty text will continue to display if there are no items in the collection. The GridRenderer feature found in the MVCContrib Grid is so well put together, I just had to share.  * Though you can find countless alternatives to the fixed headers problem online, this is the only solution that I’ve ever found to reliably work across browsers. If you know something I don’t, please share.

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  • Mysql query does not update row [closed]

    - by Gerculy Robert
    // Connect to server and select database. mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select DB"); // get value of id that sent from address bar /*$id=$_GET['$usrid'];*/ // Retrieve data from database $sql="SELECT * FROM user WHERE id='$usrid'"; $result=mysql_query($sql); $rows=mysql_fetch_array($result); ?> <table width="400" border="0" cellspacing="1" cellpadding="0"> <tr> <form name="form1" method="post" action="update.php"> <td> <table width="100%" border="0" cellspacing="1" cellpadding="0"> <tr> <td>&nbsp;</td> <td colspan="3"><strong>Update site info</strong> </td> </tr> <tr> <td align="center">&nbsp;</td> <td align="center">&nbsp;</td> <td align="center">&nbsp;</td> <td align="center">&nbsp;</td> </tr> <tr> <td align="center">&nbsp;</td> <td align="center"><strong>User Name</strong></td> <td align="center"><strong>Site url</strong></td> <td align="center"><strong>Url banner</strong></td> </tr> <tr> <td>&nbsp;</td> <td align="center"> <input name="username" type="text" id="username" value="<? echo $rows['username']; ?>"> </td> <td align="center"> <input name="siteurl" type="text" id="siteurl" value="<? echo $rows['siteurl']; ?>" size="40"> </td> <td> <input name="urlbanner" type="text" id="urlbanner" value="<? echo $rows['urlbanner']; ?>" size="40"> </td> </tr> <tr> <td>&nbsp;</td> <td> <input name="id" type="hidden" id="id" value="<? echo $rows['id']; ?>"> </td> <td align="center"> <input type="submit" name="Submit" value="Submit"> </td> <td>&nbsp;</td> </tr> </table> </td> </form> </tr> </table> <?php // close connection mysql_close(); ?> // Connect to server and select database. mysql_connect("$host", "$username", "$password")or die("cannot connect"); mysql_select_db("$db_name")or die("cannot select DB"); // update data in mysql database $sql="update user SET siteurl='$siteurl', username='$username', urlbanner='$urlbanner' WHERE id=$usrid"; $result=mysql_query($sql); // if successfully updated. if($result){ echo "Successful"; echo "<BR>"; echo "<a href='edit.php'>View result</a>"; } else { echo "ERROR"; } Hello, I have this two pages wich should update 3 rows. The problem is it does not update all , only 2 . I tried over 1 hour to find the problem but nothing. The row , siteurl, is not being updated at all . The table is : varchar(255) Database and session is ok. Any idea ? It's just a simple update code , should work fine :(

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  • Is SQL Server DRI (ON DELETE CASCADE) slow?

    - by Aaronaught
    I've been analyzing a recurring "bug report" (perf issue) in one of our systems related to a particularly slow delete operation. Long story short: It seems that the CASCADE DELETE keys were largely responsible, and I'd like to know (a) if this makes sense, and (b) why it's the case. We have a schema of, let's say, widgets, those being at the root of a large graph of related tables and related-to-related tables and so on. To be perfectly clear, deleting from this table is actively discouraged; it is the "nuclear option" and users are under no illusions to the contrary. Nevertheless, it sometimes just has to be done. The schema looks something like this: Widgets | +--- Anvils (1:1) | | | +--- AnvilTestData (1:N) | +--- WidgetHistory (1:N) | +--- WidgetHistoryDetails (1:N) Nothing too scary, really. A Widget can be different types, an Anvil is a special type, so that relationship is 1:1 (or more accurately 1:0..1). Then there's a large amount of data - perhaps thousands of rows of AnvilTestData per Anvil collected over time, dealing with hardness, corrosion, exact weight, hammer compatibility, usability issues, and impact tests with cartoon heads. Then every Widget has a long, boring history of various types of transactions - production, inventory moves, sales, defect investigations, RMAs, repairs, customer complaints, etc. There might be 10-20k details for a single widget, or none at all, depending on its age. So, unsurprisingly, there's a CASCADE DELETE relationship at every level here. If a Widget needs to be deleted, it means something's gone terribly wrong and we need to erase any records of that widget ever existing, including its history, test data, etc. Again, nuclear option. Relations are all indexed, statistics are up to date. Normal queries are fast. The system tends to hum along pretty smoothly for everything except deletes. Getting to the point here, finally, for various reasons we only allow deleting one widget at a time, so a delete statement would look like this: DELETE FROM Widgets WHERE WidgetID = @WidgetID Pretty simple, innocuous looking delete... that takes over 2 minutes to run, for a widget with no data! After slogging through execution plans I was finally able to pick out the AnvilTestData and WidgetHistoryDetails deletes as the sub-operations with the highest cost. So I experimented with turning off the CASCADE (but keeping the actual FK, just setting it to NO ACTION) and rewriting the script as something very much like the following: DECLARE @AnvilID int SELECT @AnvilID = AnvilID FROM Anvils WHERE WidgetID = @WidgetID DELETE FROM AnvilTestData WHERE AnvilID = @AnvilID DELETE FROM WidgetHistory WHERE HistoryID IN ( SELECT HistoryID FROM WidgetHistory WHERE WidgetID = @WidgetID) DELETE FROM Widgets WHERE WidgetID = @WidgetID Both of these "optimizations" resulted in significant speedups, each one shaving nearly a full minute off the execution time, so that the original 2-minute deletion now takes about 5-10 seconds - at least for new widgets, without much history or test data. Just to be absolutely clear, there is still a CASCADE from WidgetHistory to WidgetHistoryDetails, where the fanout is highest, I only removed the one originating from Widgets. Further "flattening" of the cascade relationships resulted in progressively less dramatic but still noticeable speedups, to the point where deleting a new widget was almost instantaneous once all of the cascade deletes to larger tables were removed and replaced with explicit deletes. I'm using DBCC DROPCLEANBUFFERS and DBCC FREEPROCCACHE before each test. I've disabled all triggers that might be causing further slowdowns (although those would show up in the execution plan anyway). And I'm testing against older widgets, too, and noticing a significant speedup there as well; deletes that used to take 5 minutes now take 20-40 seconds. Now I'm an ardent supporter of the "SELECT ain't broken" philosophy, but there just doesn't seem to be any logical explanation for this behaviour other than crushing, mind-boggling inefficiency of the CASCADE DELETE relationships. So, my questions are: Is this a known issue with DRI in SQL Server? (I couldn't seem to find any references to this sort of thing on Google or here in SO; I suspect the answer is no.) If not, is there another explanation for the behaviour I'm seeing? If it is a known issue, why is it an issue, and are there better workarounds I could be using?

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  • Rails destroy confirm with Jquery AJAX

    - by Mike
    I have got this working for the most part. My rails link is: <%= link_to(image_tag('/images/bin.png', :alt => 'Remove'), @business, :class => 'delete', :confirm => 'Are you sure?', :id => 'trash') %> :class = "delete" is calling an ajax function so that it is deleted and the page isn't refreshed that works great. But because the page doesn't refresh, it is still there. So my id trash is calling this jquery function: $('[id^=trash]').click(function(){ var row = $(this).closest("tr").get(0); $(row).hide(); return false; }); Which is hiding the row of whatever trash icon i clicked on. This also works great. I thought I had it all worked out and then I hit this problem. When you click on my trash can I have this confirm box pop up to ask you if you are sure. Regardless of whether you choose cancel or accept, the jquery fires and it hides the row. It isn't deleted, only hidden till you refresh the page. I tried changing it so that the prompt is done through jquery, but then rails was deleteing the row regardless of what i choose in my prompt because the .destroy function was being called when the prompt was being called. My question really is how can i get the value to cancel or accept from the rails confirm pop up so that in my jquery I can have an if statement that hides if they click accept and does nothing if they click cancel. EDIT: Answering Question below. That did not work. I tried changing my link to: <%= link_to(image_tag('/images/bin.png', :alt => 'Remove'), @business, :class => "delete", :onclick => "trash") %> and putting this in my jquery function trash(){ if(confirm("Are you sure?")){ var row = $(this).closest("tr").get(0); $(row).hide(); return false; } else { //they clicked no. } } But the function was never called. It just deletes it with no prompt and doesn't hide it. But that gave me an idea. I took the delete function that ajax was calling $('a.delete').click (function(){ $.post(this.href, {_method:'delete'}, null, "script"); $(row).hide(); }); And modified it implementing your code: remove :confirm = 'Are you sure?' $('a.delete').click (function(){ if(confirm("Are you sure?")){ var row = $(this).closest("tr").get(0); $.post(this.href, {_method:'delete'}, null, "script"); $(row).hide(); return false; } else { //they clicked no. return false; } }); Which does the trick.

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  • DataGridView row is still dirty after committing changes

    - by Ecyrb
    DataGridView.IsCurrentRowDirty remains true after I commit changes to the database. I want to set it to false so it doesn't trigger RowValidating when it loses focus. I have a DataGridView bound to a BindingList<T>. I handle the CellEndEdit event and save changes to the database. After saving those changes I would like DataGridView.IsCurrentRowDirty to be set to true, since all cells in the row are up-to-date; however, it's set to false. This causes problems for me because when the row does lose focus it will trigger RowValidating, which I handle and validate all three cells in. So even though all the cells are valid and none are dirty it will still validate them all. That's a waste. Here's an example of what I have: void dataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) { // Ignore cell if it's not dirty if (dataGridView.isCurrentCellDirty) return; // Validate current cell. } void dataGridView_RowValidating(object sender, DataGridViewCellCancelEventArgs e) { // Ignore Row if it's not dirty if (!dataGridView.IsCurrentRowDirty) return; // Validate all cells in the current row. } void dataGridView_CellEndEdit(object sender, DataGridViewCellEventArgs e) { // Validate all cells in the current row and return if any are invalid. // If they are valid, save changes to the database // This is when I would expect dataGridView.IsCurrentRowDirty to be false. // When this row loses focus it will trigger RowValidating and validate all // cells in this row, which we already did above. } I've read posts that said I could call the form's Validate() method, but that will cause RowValidating to fire, which is what I'm trying to avoid. Any idea how I can set DataGridView.IsCurrentRowDirty to true? Or maybe a way to prevent RowValidating from unnecessarily validating all the cells?

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  • Google Apps Script - Sending Google Spreadsheet Row to Email

    - by AME
    Hi I am trying to write a script using Google Apps Script (Javascript) for a Google spreadsheet. I am trying to do the same thing that is shown in this tutorial [http://www.google.com/google-d-s/scripts/sending_emails.html][1], but each row in my spreadsheet has 24 columns. I would like to send out the contents of each row as an email. Here is the code as I am trying to use: function sendEmails() { var sheet = SpreadsheetApp.getActiveSheet(); var dataRange = sheet.getRange("A2:X31") // Fetch values for each row in the Range. var data = dataRange.getValues(); for (i in data) { var row = data[i]; var i = i + 1; var emailAddress = row[0]; // First column var message = row[1]; // Second column var subject = "Sending emails from a Spreadsheet"; MailApp.sendEmail(emailAddress, subject, message); } }? The result is an email with the contents in the "B" column only. Can someone help me change this code to get all of the contents in each row (columns A-X). Thanks,

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