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  • How do I make this Query against EF Efficient?

    - by dudeNumber4
    Using EF4. Assume I have this: IQueryable<ParentEntity> qry = myRepository.GetParentEntities(); Int32 n = 1; What I want to do is this, but EF can't compare against null. qry.Where( parent => parent.Children.Where( child => child.IntCol == n ) != null ) What works is this, but the SQL it produces (as you would imagine) is pretty inefficient: qry.Where( parent => parent.Children.Where( child => child.IntCol == n ).FirstOrDefault().IntCol == n ) How can I do something like the first comparison to null that won't be generating nested queries and so forth?

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  • Does XAML design mode support more color than code view?

    - by Rahul Soni
    While working with SilverLight using Visual Studio 10, I found that in design mode XAML allows a wide plethora of colors. For ex. Lime is a valid color in XAML. <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5"> <GradientStop Color="Yellow" Offset="0" /> <GradientStop Color="Lime" Offset="1" /> While working with code though, I found that Lime and many other colors are missing... GradientStop blueGS = new GradientStop(); blueGS.Color = Colors.Lime; What am I missing? Both of these colors belong to System.Windows.Media.Colors.

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  • Rails: getting logic to run at end of request, regardless of filter chain aborts?

    - by JSW
    Is there a reliable mechanism discussed in rails documentation for calling a function at the end of the request, regardless of filter chain aborts? It's not after filters, because after filters don't get called if any prior filter redirected or rendered. For context, I'm trying to put some structured profiling/reporting information into the app log at the end of every request. This information is collected throughought the request lifetime via instance variables wrapped in custom controller accessors, and dumped at the end in a JSON blob for use by a post-processing script. My end goal is to generate reports about my application's logical query distribution (things that depend on controller logic, not just request URIs and parameters), performance profile (time spent in specific DB queries or blocked on webservices), failure rates (including invalid incoming requests that get rejected by before_filter validation rules), and a slew of other things that cannot really be parsed from the basic information in the application and apache logs. At a higher level, is there a different "rails way" that solves my app profiling goal?

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  • what this `^` mean here in solr

    - by Rahul Mehta
    I am confuse her but i want to clear my doubt. I think it is stupid question but i want to know. Use a TokenFilter that outputs two tokens (one original and one lowercased) for each input token. For queries, the client would need to expand any search terms containing upper case characters to two terms, one lowercased and one original. The original search term may be given a boost, although it may not be necessary given that a match on both terms will produce a higher score. text:NeXT ==> (text:NeXT^10 OR text:next) what this ^ mean here . http://wiki.apache.org/solr/SolrRelevancyCookbook#Relevancy_and_Case_Matching

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  • Fixing "Lock wait timeout exceeded; try restarting transaction" for a 'stuck" Mysql table?

    - by Tom
    From a script I sent a query like this thousands of times to my local database: update some_table set some_column = some_value I forgot to add the where part, so the same column was set to the same a value for all the rows in the table and this was done thousands of times and the column was indexed, so the corresponding index was probably updated too lots of times. I noticed something was wrong, because it took too long, so I killed the script. I even rebooted my computer since them, but something stuck in the table, because simple queries take a very long time to run and when I try dropping the relevant index it fails with this message: Lock wait timeout exceeded; try restarting transaction It's an innodb table, so stuck the transaction is probably implicit. How can I fix this table and remove the stuck transaction from it?

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  • How to make django test framework read from live database?

    - by lfborjas
    I realize there's a similar question here, but this one has a different approach: I have a django app that does queries over data indexed with djapian ; I'd like to write unit tests for this app's search component, and, obviously, I'd need the django settings module and all connections with the database active, so the test runner that django provides seems ideal. however, the django testing framework creates a dummy database and I'd hate to dump all my data to a fixture and then index it (the tests would take forever!); My data isn't at risk because the tests would only read from the database, so, how could this be achieved? -I'm new at this whole unit testing thing, so the solution of writing a new test runner I read in that similar question doesn't enlighten me a bit, at least not without some details

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  • Django Template Inheritance -- Missing Images?

    - by user367817
    Howdy, I have got the following file heirarchy: project   other stuff   templates       images           images for site       app1           templates for app1       registration           login template       base.html (base for entire site)       style.css (for base.html) In the login template, I am extending 'base.html.' 'base.html' uses 'style.css' along with all of the images in the 'templates/images' directory. For some reason, none of the CSS styles or images will show up in the login template, even though I'm extending it. Does this missing image issue have something to do with screwed up "media" settings somewhere? I never understood those, but this is a major roadblock in my proof-of-concept, so any help is appreciated. Thanks!

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  • PostgreSQL: How to index all foreign keys?

    - by biggusjimmus
    I am working with a large PostgreSQL database, and I are trying to tune it to get more performance. Our queries and updates seem to be doing a lot of lookups using foreign keys. What I would like is a relatively simple way to add Indexes to all of our foreign keys without having to go through every table (~140) and doing it manually. In researching this, I've come to find that there is no way to have Postgres do this for you automatically (like MySQL does), but I would be happy to hear otherwise there, too.

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  • Should I uniform different API calls to a single format before caching?

    - by bluedaniel
    The problem is that I am recreating the social media widget/icons on http://about.me/bluedaniel (thats me). Anyhow there can be up to 6 or 7 different API calls on the page and obviously I am caching them, at the moment with Memcached. The question is, as they arrive in various formats and sizes (fb-json, linkedin-xml, wordpress-rss etc), should I universally format/convert them before storing it in the cache. At present I have recreated the html widget and then stored that, but I worry about saving huge blocks of html in the cache as it doesn't seem that smart.

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  • jQuery AJAX & Multiple sp Result Sets

    - by Kevin
    Is it possible to use a stored procedure that returns multiple result sets in json format and process them as part of one request using ajax calls in jquery? In other words, I have a stored procedure that returns several result sets that are to be used with a series of select boxes that are all being filtered by the same criteria. If any of the select boxes is chosen that value is then passed to the stored procedure and all the subsequent select box updates reflect only results that match the filtered criteria. I don't want to have to call the same sp multiple times to process the results and was trying not to create multiple queries, so I'm wondering if it's possible to store more than one json result in a single request and then store and process them on the client side.

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  • MySQL.. search using Fulltext or using Like? What is better?

    - by user156814
    I'm working on a search feature for my application, I want to search all articles in the database. As of now, I'm using a LIKE in my queries, but I want to add a "Related Articles" feature, sort of like what SO has in the sidebar (which I see as a problem if I use Like). What's better to use for MySQL searching, Fulltext or Like... or anything else I might not know about? Also, I'm using the Kohana Framework, so If anybody knows an easy way to do fulltext matching using the query builder, I'd appreciate that. Thanks.

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  • grunt angularjs doesn't process video files

    - by Daly
    I've set up my grunt file to copy, minify, uglify, revved and all that. It works fine with all media I use, except that recently I added a video to an html file, but it's not being copied to /dist, nor is the html being updated with the versioned file (that is not being copied nor revved). Not sure what I'm missing. Here is the html fragment: <div class="col-xs-4"> <div class="row flowplayer"> <video autoplay> <source type="video/mp4" src="/videos/wedding_planners_bride_smallweb.mp4"> </video> </div> </div> What do I need to add to my gruntfile.js file to process /videos the same way /images are just working out of the box? Thanks

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  • Including associations optimization in Rails

    - by Vitaly
    Hey, I'm looking for help with Ruby optimization regarding loading of associations on demand. This is simplified example. I have 3 models: Post, Comment, User. References are: Post has many comments and Comment has reference to User (:author). Now when I go to the post page, I expect to see post body + all comments (and their respective authors names). This requires following 2 queries: select * from Post -- to get post data (1 row) select * from Comment inner join User -- to get comment + usernames (N rows) In the code I have: Post.find(params[:id], :include => { :comments => [:author] } But it doesn't work as expected: as I see in the back end, there're still N+1 hits (some of them are cached though). How can I optimize that?

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  • How to stream a WAV file?

    - by jonasb
    I'm writing an app where I record audio and upload the audio file over the web. In order to speed up the upload I want to start uploading before I've finished recording. The file I'm creating is a WAV file. My plan was to use multiple data chunks. So instead of the normal encoding (RIFF, fmt , data) I’m using (RIFF, fmt , data, data, ..., data). The first issue is that the RIFF header wants the total length of the whole file, but that is of course not known when streaming the audio (I’m now using an arbitrary number). The other problem is that I'm not sure if it's valid since Audacity doesn't recognise the file, and Windows Media Player opens the file but plays only a very small part. I've been reading WAV specs but haven’t found an answer. Any suggestions?

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  • Inheritance in kohana

    - by Binaryrespawn
    Hi all, I have recently started to use Kohana and I know inheritance is in infancy stages at the moment. The work around is using a $_has_one annotation on the child class model. In may case i have "page" as the parent of "article". I have something like, protected $_has_one = array('mypage'=>array('model'=>'page', 'foreign_key'=>'id')); In my controller, I have an action which queries the database. In this query I am trying to access fields form the parent of "article" which is the "page". $n->articles=ORM::factory('article')->where('expires','=',0) ->where('articledate','<',date('y-m-d')) ->where('expirydate','>',date('y-m-d')) ->where('mypage->status','=','PUBLISHED') ->order_by('articledate','desc') ->find_all(); The status column resides in the page table and my query is generating an error to the effect of "cannot find status", clearly because it belongs to the parent. Any ideas ?

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  • Dynamic query to immediate execute?

    - by Curtis White
    I am using the MSDN Dynamic linq to sql package. It allows using strings for queries. But, the returned type is an IQueryable and not an IQueryable<T>. I do not have the ToList() method. How can I this immediate execute without manually enumerating over the IQueryable? My goal is to databind to the Selecting event on a linqtosql datasource and that throws a datacontext disposed exception. I can set the query as the Datasource on a gridview though. Any help greatly appreciated! Thanks. The dynamic linq to sql is the one from the samples that comes with visual studio.

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  • Fulltext for innoDB? or a good solution for php app

    - by Joshua
    I have a table I want to run a fulltext search on, but it is currently innoDB and is using a lot of foreign keys for other kinds of queries. Should I make like a 1:1 "meta-data" table that is myisam for fulltext? Also I am reading some things that say that fulltext corrupts MySQL tables pretty randomly? I dunno, the articles are a couple years old, maybe they've fixed that in 5+? If not what's a good solution for searching? Zend_Lucene seems cool but slow, even with caching, for the client's large tables and autocomplete functionality et al.

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  • JQuery Two colour slider control automatic move

    - by Geetha
    Hi All, I creating a slider control with two colours for media player streaming. Working: i can drag/ move the slider. Needs: I want to move the slider automatically.(1. Once the control is ready and 2. After changing the position of the slider, from that position it has to move automatically) Code: var slider1 = new Control.Slider('handle1', 'track1', { animate: true, range: $R(0, 10), max: 10, min: 0, sliderValue: 5, startSpan: 'span1', onChange: function(v) { handleSliderChange(v); } }); Plugins: <script src="js/prototype.js" type="text/javascript"></script> <script src="js/slider.js" type="text/javascript"></script> Geetha.

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  • Compiled query using list of class objects in C#

    - by Sukan
    Hello , Can somebody help me out in creating compiled queries where input is to be a list of class objects? I have seen examples where Func<DataContext, somematchobject, IQueryable<T>> is created and compiled. But can I do something like Func<List<T>, matchObject, T>, and compile it? Basically I want an object(T) meeting certain conditions (as in matchObject) to be returned from a list of objects(List<T>). Will CompiledQuery.Compile help me in this? Please help me experts!!

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  • PHP Framework Benefits / Downfalls

    - by Lizard
    I have been a PHP developer for about 10 years now and until about a month ago I have never used a framework. The framework I am now using due to an existing codebase is cakePHP 1.2 I can see certain benefits of the frameworks with the basic helpers like default layouts. I can deffinately seen the benefits of MVC keeping the logic sperate etc. But the query building just seems to be bloated. Is this expected? Am I likely to be able to build better queries than the framework could build? I just feel I could get my apps running better without a framework. What are your thoughts?

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  • Does normalization really hurt performance in high traffic sites?

    - by Luke101
    I am designing a database and I would like to normalize the database. I one query I will joining about 30-40 tables. Will this hurt the website performance if it ever becomes extremely popular? This will be the main query and it will be getting called 50% of the time. The other queries I will be joining about 2 tables. I have a choice right now to normalize or not to normalize but if the normalization becomes a problem in the future i may have to rewrite 40% of the software and it may take me a long time. Does normalization really hurt in this case? Should I denormalize now while I have the time?

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  • How to limit the number of connections to a SQL Server server from my tomcat deployed java applicati

    - by CJ
    I have an application that is deployed on tomcat on server A and sends queries to a huge variety of SQL Server databases on an server B. I am concerned that my application could overload this SQL Server database server and would like some way to preventing it making requests to connect to any database on that server if some arbitrary number of connections were already in existence and unclosed. I am looking at using connection pooling but am under the impression that this will only pool connections to a specific database on the SQL Server server, I want to control the total of these combined connections that will occur to many different databases (incidentally I can only find out the names of individual db's dynamically as they change day to day). Will connection pooling take care of this for me, are am I looking at this from the wrong perspective? I have no access to the configuration of the SQL Server server. Links to tutorials or working examples of your suggested solution are most welcome!

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  • Are there hosted jQuery UI themes anywhere? [closed]

    - by Kip
    Possible Duplicate: Downloading jQuery CSS from Google's CDN I'm using Google-hosted jQuery and jQueryUI, but I'm wondering if there are hosted jQueryUI themes anywhere? I'd like to just point to a hosted CSS file (the same way I do with the hosted JS file), so that I don't have to worry about setting up directories for the widget images or the CSS files or anything like that. Update I've found this, referenced by the jqueryui.com source code: <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/ui-lightness/jquery-ui.css" type="text/css" media="all" /> Substituting the name of other themes from the themeroller page seems to work, but I'd love it if someone could find where on Google they list all the available themes that they are hosting. I'm not finding anything about this (maybe it is very recent?).

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  • how to use TinyMCE(rich text editor) in google-maps info window..

    - by zjm1126
    this is the demo rar file:http://omploader.org/vM3U1bA when i drag the red block to the google-maps ,it will be changed to a marker, and it will has TinyMCE when you click the info window, but my program is : it can not be written when i click it the second time, the first time: the second time(can not be written): and my code is : <!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.0//EN" "http://www.wapforum.org/DTD/xhtml-mobile10.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width,minimum-scale=0.3,maximum-scale=5.0,user-scalable=yes"> </head> <body onload="initialize()" onunload="GUnload()"> <style type="text/css"> *{ margin:0; padding:0; } </style> <!--<div style="width:100px;height:100px;background:blue;"> </div>--> <div id="map_canvas" style="width: 500px; height: 300px;"></div> <div class=b style="width: 20px; height: 20px;background:red;position:absolute;left:700px;top:200px;"></div> <div class=b style="width: 20px; height: 20px;background:red;position:absolute;left:700px;top:200px;"></div> <script src="jquery-1.4.2.js" type="text/javascript"></script> <script type="text/javascript" src="tiny_mce.js"></script> <script src="jquery-ui-1.8rc3.custom.min.js" type="text/javascript"></script> <script src="http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAA-7cuV3vqp7w6zUNiN_F4uBRi_j0U6kJrkFvY4-OX2XYmEAa76BSNz0ifabgugotzJgrxyodPDmheRA&sensor=false"type="text/javascript"></script> <script type="text/javascript"> var aFn; //********** function initialize() { if (GBrowserIsCompatible()) { var map = new GMap2(document.getElementById("map_canvas")); var center=new GLatLng(39.9493, 116.3975); map.setCenter(center, 13); aFn=function(x,y){ var point =new GPoint(x,y) point = map.fromContainerPixelToLatLng(point); //console.log(point.x+" "+point.y) var marker = new GMarker(point,{draggable:true}); var a=$( '<form method="post" action="" style="height:100px;overflow:hidden;width:220px;">'+ '<textarea id="" class="mce" name="content" cols="22" rows="5" style="border:none">sss</textarea>'+ '</form>') a.click(function(){ // }) GEvent.addListener(marker, "click", function() { marker.openInfoWindowHtml(a[0]); }); /****************** GEvent.addListener(marker, 'click', function() { marker.openInfoWindowHtml('<div contentEditable="true" ' + 'style="height: 100px; overflow: auto;">' + 'wwww</div>'); }); ***************/ map.addOverlay(marker); /********** var marker = new GMarker(point, {draggable: true}); GEvent.addListener(marker, "dragstart", function() { map.closeInfoWindow(); }); GEvent.addListener(marker, "dragend", function() { marker.openInfoWindowHtml("????..."); }); map.addOverlay(marker); //*/ } $(".b").draggable({ revert: true, revertDuration: 0 }); $("#map_canvas").droppable({ drop: function(event,ui) { //console.log(ui.offset.left+' '+ui.offset.top) aFn(event.pageX-$("#map_canvas").offset().left,event.pageY-$("#map_canvas").offset().top); } }); } } //********** $(".mce").live("click", function(){ var once=0; mce(); }); function mce(once){ if(once)return; tinyMCE.init({ // General options mode : "textareas", theme : "advanced", plugins : "safari,pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,inlinepopups,insertdatetime,preview,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,nonbreaking,xhtmlxtras,template", // Theme options theme_advanced_buttons1 : "bold,forecolor,|,justifyleft,justifycenter,justifyright,|,fontsizeselect", theme_advanced_buttons2 : "", theme_advanced_buttons3 : "", theme_advanced_buttons4 : "", theme_advanced_toolbar_location : "top", theme_advanced_toolbar_align : "left", theme_advanced_statusbar_location : "bottom", theme_advanced_resizing : true, // Example content CSS (should be your site CSS) content_css : "css/example.css", // Drop lists for link/image/media/template dialogs template_external_list_url : "js/template_list.js", external_link_list_url : "js/link_list.js", external_image_list_url : "js/image_list.js", media_external_list_url : "js/media_list.js", // Replace values for the template plugin template_replace_values : { username : "Some User", staffid : "991234" } }); once=1; } //********** </script> </body> </html>

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  • Embedded MongoDB when running integration tests

    - by seanhodges
    My question is a variation of this one. Since my Java Web-app project requires a lot of read filters/queries and interfaces with tools like GridFS, I'm struggling to think of a sensible way to simulate MongoDB in the way the above solution suggests. Therefore, I'm considering running an embedded instance of MongoDB alongside my integration tests. I'd like it to start up automatically (either for each test or the whole suite), flush the database for every test, and shut down at the end. These tests might be run on development machines as well as the CI server, so my solution will also need to be portable. Can anyone with more knowledge on MongoDB help me get idea of the feasibility of this approach, and/or perhaps suggest any reading material that might help me get started? I'm also open to other suggestions people might have on how I could approach this problem...

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